refactored all functions (#145)

* refactored stat_object

refactored select_object_content

refactor get_presigned_object_url

refactor get_presigned_policy_form_data

refactored upload-part-copy

* fixed object.unwrap

* update region

* made client Arc

* made client Arc

* update client

* update tests

* update segmented_bytes

* bench updated

* cleanup version handling

* cleanup of headers: multimap

* added inner in Client

* updated clients: added Into<String>in API

* Separated http_client and shared client items in Client

.github/workflows/rust.yml

@@ -23,7 +23,7 @@ jobs:
         cargo clippy --all-targets --all-features
         cargo build --bins --examples --tests --benches --verbose
 
-    - name: Run tests
+    - name: Run tests S3
       run: |
         ./tests/start-server.sh
         export SERVER_ENDPOINT=localhost:9000

Cargo.toml

@@ -48,7 +48,7 @@ ring = { version = "0.17.14", optional = true, default-features = false, feature
 serde = { version = "1.0.219", features = ["derive"] }
 serde_json = "1.0.140"
 sha2 = { version = "0.10.8", optional = true }
-tokio = { version = "1.44.1", features = ["full"] }
+tokio = { version = "1.44.2", features = ["full"] }
 tokio-stream = "0.1.17"
 tokio-util = { version = "0.7.14", features = ["io"] }
 urlencoding = "2.1.3"
@@ -59,7 +59,7 @@ http = "1.3.1"
 [dev-dependencies]
 minio_common = { path = "./common" }
 async-std = { version = "1.13.1", features = ["attributes", "tokio1"] }
-clap = { version = "4.5.34", features = ["derive"] }
+clap = { version = "4.5.35", features = ["derive"] }
 quickcheck = "1.0.3"
 criterion = "0.5.1"
 
@@ -76,6 +76,9 @@ name = "file_downloader"
 [[example]]
 name = "object_prompt"
 
+[[example]]
+name = "append_object"
+
 [[bench]]
 name = "s3-api"
 path = "benches/s3/api_benchmarks.rs"

benches/s3/api_benchmarks.rs

@@ -21,14 +21,15 @@ mod bench_bucket_replication;
 mod bench_bucket_tags;
 mod bench_bucket_versioning;
 mod bench_list_bucket;
+mod bench_object_append;
+mod bench_object_copy;
 mod bench_object_legal_hold;
 mod bench_object_lock_config;
+mod bench_object_put;
 mod bench_object_retention;
 mod bench_object_tags;
 mod common_benches;
 
-mod bench_object_copy;
-
 use criterion::{Criterion, criterion_group, criterion_main};
 use std::time::Duration;
 
@@ -43,9 +44,12 @@ use crate::bench_bucket_tags::*;
 use crate::bench_bucket_versioning::*;
 use crate::bench_list_bucket::*;
 #[allow(unused_imports)]
+use crate::bench_object_append::bench_object_append;
+#[allow(unused_imports)]
 use crate::bench_object_copy::*;
 use crate::bench_object_legal_hold::*;
 use crate::bench_object_lock_config::*;
+use crate::bench_object_put::bench_object_put;
 use crate::bench_object_retention::*;
 use crate::bench_object_tags::*;
 
@@ -54,9 +58,9 @@ criterion_group!(
     config = Criterion::default()
         .configure_from_args()
         .warm_up_time(Duration::from_secs_f32(0.01))
-        .sample_size(100)
+        .sample_size(1000)
         .nresamples(1001)
-        .measurement_time(Duration::from_secs_f32(0.5));
+        .measurement_time(Duration::from_secs_f32(10.0));
     targets =
         bench_bucket_exists,
         bench_set_bucket_lifecycle,
@@ -83,7 +87,9 @@ criterion_group!(
         bench_get_bucket_versioning,
         //
         bench_list_buckets,
-        //bench_object_copy, //TODO first refactor object_copy
+        bench_object_copy_internal,
+        bench_object_append,
+        bench_object_put,
         //
         bench_enable_object_legal_hold,
         bench_disable_object_legal_hold,

benches/s3/bench_bucket_exists.rs

@@ -23,6 +23,6 @@ pub(crate) fn bench_bucket_exists(criterion: &mut Criterion) {
         "bucket_exists",
         criterion,
         || async { Ctx2::new().await },
-        |ctx| BucketExists::new(&ctx.bucket).client(&ctx.client),
+        |ctx| BucketExists::new(ctx.client.clone(), ctx.bucket.clone()),
     );
 }

benches/s3/bench_bucket_lifecycle.rs

@@ -27,8 +27,7 @@ pub(crate) fn bench_set_bucket_lifecycle(criterion: &mut Criterion) {
         || async { Ctx2::new().await },
         |ctx| {
             let config = create_bucket_lifecycle_config_examples();
-            SetBucketLifecycle::new(&ctx.bucket)
-                .client(&ctx.client)
+            SetBucketLifecycle::new(ctx.client.clone(), ctx.bucket.clone())
                 .life_cycle_config(config)
         },
     )
@@ -40,15 +39,15 @@ pub(crate) fn bench_get_bucket_lifecycle(criterion: &mut Criterion) {
         || async {
             let ctx = Ctx2::new().await;
             let config = create_bucket_lifecycle_config_examples();
-            SetBucketLifecycle::new(&ctx.bucket)
-                .client(&ctx.client)
+            ctx.client
+                .set_bucket_lifecycle(&ctx.bucket)
                 .life_cycle_config(config)
                 .send()
                 .await
                 .unwrap();
             ctx
         },
-        |ctx| GetBucketLifecycle::new(&ctx.bucket).client(&ctx.client),
+        |ctx| GetBucketLifecycle::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }
 pub(crate) fn bench_delete_bucket_lifecycle(criterion: &mut Criterion) {
@@ -56,6 +55,6 @@ pub(crate) fn bench_delete_bucket_lifecycle(criterion: &mut Criterion) {
         "delete_bucket_lifecycle",
         criterion,
         || async { Ctx2::new().await },
-        |ctx| DeleteBucketLifecycle::new(&ctx.bucket).client(&ctx.client),
+        |ctx| DeleteBucketLifecycle::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }

benches/s3/bench_bucket_notification.rs

@@ -28,8 +28,7 @@ pub(crate) fn bench_set_bucket_notification(criterion: &mut Criterion) {
         || async { Ctx2::new().await },
         |ctx| {
             let config = create_bucket_notification_config_example();
-            SetBucketNotification::new(&ctx.bucket)
-                .client(&ctx.client)
+            SetBucketNotification::new(ctx.client.clone(), ctx.bucket.clone())
                 .notification_config(config)
         },
     )
@@ -42,15 +41,15 @@ pub(crate) fn bench_get_bucket_notification(criterion: &mut Criterion) {
         || async {
             let ctx = Ctx2::new().await;
             let config = create_bucket_notification_config_example();
-            SetBucketNotification::new(&ctx.bucket)
-                .client(&ctx.client)
+            ctx.client
+                .set_bucket_notification(&ctx.bucket)
                 .notification_config(config)
                 .send()
                 .await
                 .unwrap();
             ctx
         },
-        |ctx| GetBucketNotification::new(&ctx.bucket).client(&ctx.client),
+        |ctx| GetBucketNotification::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }
 #[allow(dead_code)]
@@ -59,6 +58,6 @@ pub(crate) fn bench_delete_bucket_notification(criterion: &mut Criterion) {
         "delete_bucket_notification",
         criterion,
         || async { Ctx2::new().await },
-        |ctx| DeleteBucketNotification::new(&ctx.bucket).client(&ctx.client),
+        |ctx| DeleteBucketNotification::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }

benches/s3/bench_bucket_policy.rs

@@ -27,9 +27,7 @@ pub(crate) fn bench_set_bucket_policy(criterion: &mut Criterion) {
         || async { Ctx2::new().await },
         |ctx| {
             let config = create_bucket_policy_config_example(&ctx.bucket);
-            SetBucketPolicy::new(&ctx.bucket)
-                .client(&ctx.client)
-                .config(config)
+            SetBucketPolicy::new(ctx.client.clone(), ctx.bucket.clone()).config(config)
         },
     )
 }
@@ -40,15 +38,14 @@ pub(crate) fn bench_get_bucket_policy(criterion: &mut Criterion) {
         || async {
             let ctx = Ctx2::new().await;
             let config = create_bucket_policy_config_example(&ctx.bucket);
-            SetBucketPolicy::new(&ctx.bucket)
-                .client(&ctx.client)
+            SetBucketPolicy::new(ctx.client.clone(), ctx.bucket.clone())
                 .config(config)
                 .send()
                 .await
                 .unwrap();
             ctx
         },
-        |ctx| GetBucketPolicy::new(&ctx.bucket).client(&ctx.client),
+        |ctx| GetBucketPolicy::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }
 pub(crate) fn bench_delete_bucket_policy(criterion: &mut Criterion) {
@@ -56,6 +53,6 @@ pub(crate) fn bench_delete_bucket_policy(criterion: &mut Criterion) {
         "delete_bucket_policy",
         criterion,
         || async { Ctx2::new().await },
-        |ctx| DeleteBucketPolicy::new(&ctx.bucket).client(&ctx.client),
+        |ctx| DeleteBucketPolicy::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }

benches/s3/bench_bucket_replication.rs

@@ -53,8 +53,7 @@ pub(crate) fn bench_set_bucket_replication(criterion: &mut Criterion) {
         |ctx| {
             let config =
                 create_bucket_replication_config_example(ctx.aux_bucket.clone().unwrap().as_str());
-            SetBucketReplication::new(&ctx.bucket)
-                .client(&ctx.client)
+            SetBucketReplication::new(ctx.client.clone(), ctx.bucket.clone())
                 .replication_config(config)
         },
     )
@@ -86,7 +85,7 @@ pub(crate) fn bench_get_bucket_replication(criterion: &mut Criterion) {
 
             ctx
         },
-        |ctx| GetBucketReplication::new(&ctx.bucket).client(&ctx.client),
+        |ctx| GetBucketReplication::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }
 #[allow(dead_code)]
@@ -116,6 +115,6 @@ pub(crate) fn bench_delete_bucket_replication(criterion: &mut Criterion) {
 
             ctx
         },
-        |ctx| DeleteBucketReplication::new(&ctx.bucket).client(&ctx.client),
+        |ctx| DeleteBucketReplication::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }

benches/s3/bench_bucket_tags.rs

@@ -13,34 +13,36 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::common_benches::{Ctx2, benchmark_s3_api};
+use crate::common_benches::{Ctx2, benchmark_s3_api, skip_express_mode};
 
 use criterion::Criterion;
 use minio::s3::builders::{DeleteBucketTags, GetBucketTags, SetBucketTags};
-use minio::s3::response::SetBucketTagsResponse;
 use minio::s3::types::S3Api;
 use minio_common::example::create_tags_example;
 
 pub(crate) fn bench_set_bucket_tags(criterion: &mut Criterion) {
+    if skip_express_mode("bench_set_bucket_tags") {
+        return;
+    }
     benchmark_s3_api(
         "set_bucket_tags",
         criterion,
         || async { Ctx2::new().await },
         |ctx| {
-            SetBucketTags::new(&ctx.bucket)
-                .client(&ctx.client)
-                .tags(create_tags_example())
+            SetBucketTags::new(ctx.client.clone(), ctx.bucket.clone()).tags(create_tags_example())
         },
     )
 }
 pub(crate) fn bench_get_bucket_tags(criterion: &mut Criterion) {
+    if skip_express_mode("bench_get_bucket_tags") {
+        return;
+    }
     benchmark_s3_api(
         "get_bucket_tags",
         criterion,
         || async {
             let ctx = Ctx2::new().await;
-            let _resp: SetBucketTagsResponse = ctx
-                .client
+            ctx.client
                 .set_bucket_tags(&ctx.bucket)
                 .tags(create_tags_example())
                 .send()
@@ -48,14 +50,17 @@ pub(crate) fn bench_get_bucket_tags(criterion: &mut Criterion) {
                 .unwrap();
             ctx
         },
-        |ctx| GetBucketTags::new(&ctx.bucket).client(&ctx.client),
+        |ctx| GetBucketTags::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }
 pub(crate) fn bench_delete_bucket_tags(criterion: &mut Criterion) {
+    if skip_express_mode("bench_delete_bucket_tags") {
+        return;
+    }
     benchmark_s3_api(
         "delete_bucket_tags",
         criterion,
         || async { Ctx2::new().await },
-        |ctx| DeleteBucketTags::new(&ctx.bucket).client(&ctx.client),
+        |ctx| DeleteBucketTags::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }

benches/s3/bench_bucket_versioning.rs

@@ -13,29 +13,33 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::common_benches::{Ctx2, benchmark_s3_api};
+use crate::common_benches::{Ctx2, benchmark_s3_api, skip_express_mode};
 
 use criterion::Criterion;
 use minio::s3::builders::{GetBucketVersioning, SetBucketVersioning, VersioningStatus};
 
 pub(crate) fn bench_get_bucket_versioning(criterion: &mut Criterion) {
+    if skip_express_mode("bench_get_bucket_versioning") {
+        return;
+    }
     benchmark_s3_api(
         "get_bucket_versioning",
         criterion,
         || async { Ctx2::new().await },
-        |ctx| GetBucketVersioning::new(&ctx.bucket).client(&ctx.client),
+        |ctx| GetBucketVersioning::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }
 pub(crate) fn bench_set_bucket_versioning(criterion: &mut Criterion) {
+    if skip_express_mode("bench_set_bucket_versioning") {
+        return;
+    }
     benchmark_s3_api(
         "set_bucket_versioning",
         criterion,
         || async { Ctx2::new().await },
         |ctx| {
-            let status = VersioningStatus::Enabled;
-            SetBucketVersioning::new(&ctx.bucket)
-                .client(&ctx.client)
-                .versioning_status(status)
+            SetBucketVersioning::new(ctx.client.clone(), ctx.bucket.clone())
+                .versioning_status(VersioningStatus::Enabled)
         },
     )
 }

benches/s3/bench_list_bucket.rs

@@ -23,6 +23,6 @@ pub(crate) fn bench_list_buckets(criterion: &mut Criterion) {
         "list_buckets",
         criterion,
         || async { Ctx2::new().await },
-        |ctx| ListBuckets::new().client(&ctx.client),
+        |ctx| ListBuckets::new(ctx.client.clone()),
     )
 }

benches/s3/bench_object_append.rs

@@ -0,0 +1,56 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::common_benches::{Ctx2, benchmark_s3_api};
+
+use criterion::Criterion;
+use minio::s3::builders::AppendObject;
+use minio::s3::response::StatObjectResponse;
+use minio::s3::segmented_bytes::SegmentedBytes;
+use minio::s3::types::S3Api;
+use minio_common::test_context::TestContext;
+use tokio::task;
+
+#[allow(dead_code)]
+pub(crate) fn bench_object_append(criterion: &mut Criterion) {
+    if !TestContext::new_from_env().client.is_minio_express() {
+        println!("Skipping benchmark because it is NOT running in MinIO Express mode");
+        return;
+    }
+    benchmark_s3_api(
+        "object_append",
+        criterion,
+        || async { Ctx2::new_with_object(false).await },
+        |ctx| {
+            let content1 = "Hello world 2";
+            let data1: SegmentedBytes = SegmentedBytes::from(content1.to_string());
+
+            let resp: StatObjectResponse = task::block_in_place(|| {
+                tokio::runtime::Runtime::new()?
+                    .block_on(ctx.client.stat_object(&ctx.bucket, &ctx.object).send())
+            })
+            .unwrap();
+
+            let offset_bytes: u64 = resp.size;
+            AppendObject::new(
+                ctx.client.clone(),
+                ctx.bucket.clone(),
+                ctx.object.clone(),
+                data1,
+                offset_bytes,
+            )
+        },
+    )
+}

benches/s3/bench_object_copy.rs

@@ -13,23 +13,22 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#[allow(unused_imports)]
 use crate::common_benches::{Ctx2, benchmark_s3_api};
 
 use criterion::Criterion;
+use minio::s3::builders::{CopyObjectInternal, CopySource};
+use minio_common::utils::rand_object_name;
 
-#[allow(dead_code)]
-pub(crate) fn bench_object_copy(_criterion: &mut Criterion) {
-    /*
+pub(crate) fn bench_object_copy_internal(criterion: &mut Criterion) {
     benchmark_s3_api(
-        "object_copy",
+        "object_copy_internal",
         criterion,
         || async { Ctx2::new_with_object(false).await },
         |ctx| {
-            let _object_name_dst = rand_object_name();
-            //TODO refactor copy object for this to be possible
-            todo!()
+            let object_name_src = &ctx.object;
+            let object_name_dst = rand_object_name();
+            CopyObjectInternal::new(ctx.client.clone(), ctx.bucket.clone(), object_name_dst)
+                .source(CopySource::new(&ctx.bucket, object_name_src).unwrap())
         },
-    );
-     */
+    )
 }

benches/s3/bench_object_legal_hold.rs

@@ -13,46 +13,62 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::common_benches::{Ctx2, benchmark_s3_api};
+use crate::common_benches::{Ctx2, benchmark_s3_api, skip_express_mode};
 
 use criterion::Criterion;
 use minio::s3::builders::{
     DisableObjectLegalHold, EnableObjectLegalHold, IsObjectLegalHoldEnabled,
 };
+use minio::s3::types::S3Api;
 
 pub(crate) fn bench_enable_object_legal_hold(criterion: &mut Criterion) {
+    if skip_express_mode("bench_enable_object_legal_hold") {
+        return;
+    }
     benchmark_s3_api(
         "enable_object_legal_hold",
         criterion,
         || async { Ctx2::new_with_object(true).await },
         |ctx| {
-            EnableObjectLegalHold::new(&ctx.bucket)
-                .client(&ctx.client)
-                .object(ctx.object.clone())
+            EnableObjectLegalHold::new(ctx.client.clone(), ctx.bucket.clone(), ctx.object.clone())
         },
     )
 }
 pub(crate) fn bench_disable_object_legal_hold(criterion: &mut Criterion) {
+    if skip_express_mode("bench_disable_object_legal_hold") {
+        return;
+    }
     benchmark_s3_api(
         "disable_object_legal_hold",
         criterion,
         || async { Ctx2::new_with_object(true).await },
         |ctx| {
-            DisableObjectLegalHold::new(&ctx.bucket)
-                .client(&ctx.client)
-                .object(ctx.object.clone())
+            DisableObjectLegalHold::new(ctx.client.clone(), ctx.bucket.clone(), ctx.object.clone())
         },
     )
 }
 pub(crate) fn bench_is_object_legal_hold(criterion: &mut Criterion) {
+    if skip_express_mode("bench_is_object_legal_hold") {
+        return;
+    }
     benchmark_s3_api(
         "is_object_legal_hold",
         criterion,
-        || async { Ctx2::new().await },
+        || async {
+            let ctx = Ctx2::new_with_object(true).await;
+            ctx.client
+                .enable_object_legal_hold(&ctx.bucket, &ctx.object)
+                .send()
+                .await
+                .unwrap();
+            ctx
+        },
         |ctx| {
-            IsObjectLegalHoldEnabled::new(&ctx.bucket)
-                .client(&ctx.client)
-                .object(ctx.object.clone())
+            IsObjectLegalHoldEnabled::new(
+                ctx.client.clone(),
+                ctx.bucket.clone(),
+                ctx.object.clone(),
+            )
         },
     )
 }

benches/s3/bench_object_lock_config.rs

@@ -13,37 +13,44 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::common_benches::{Ctx2, benchmark_s3_api};
+use crate::common_benches::{Ctx2, benchmark_s3_api, skip_express_mode};
 use criterion::Criterion;
 use minio::s3::builders::{DeleteObjectLockConfig, GetObjectLockConfig, SetObjectLockConfig};
 use minio_common::example::create_object_lock_config_example;
 
 pub(crate) fn bench_set_object_lock_config(criterion: &mut Criterion) {
+    if skip_express_mode("bench_set_object_lock_config") {
+        return;
+    }
     benchmark_s3_api(
         "set_object_lock_config",
         criterion,
         || async { Ctx2::new_with_object(true).await },
         |ctx| {
             let config = create_object_lock_config_example();
-            SetObjectLockConfig::new(&ctx.bucket)
-                .client(&ctx.client)
-                .config(config)
+            SetObjectLockConfig::new(ctx.client.clone(), ctx.bucket.clone()).config(config)
         },
     )
 }
 pub(crate) fn bench_get_object_lock_config(criterion: &mut Criterion) {
+    if skip_express_mode("bench_get_object_lock_config") {
+        return;
+    }
     benchmark_s3_api(
         "get_object_lock_config",
         criterion,
         || async { Ctx2::new_with_object(true).await },
-        |ctx| GetObjectLockConfig::new(&ctx.bucket).client(&ctx.client),
+        |ctx| GetObjectLockConfig::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }
 pub(crate) fn bench_delete_object_lock_config(criterion: &mut Criterion) {
+    if skip_express_mode("bench_delete_object_lock_config") {
+        return;
+    }
     benchmark_s3_api(
         "delete_object_lock_config",
         criterion,
         || async { Ctx2::new_with_object(true).await },
-        |ctx| DeleteObjectLockConfig::new(&ctx.bucket).client(&ctx.client),
+        |ctx| DeleteObjectLockConfig::new(ctx.client.clone(), ctx.bucket.clone()),
     )
 }

benches/s3/bench_object_put.rs

@@ -0,0 +1,43 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::common_benches::{Ctx2, benchmark_s3_api};
+
+use criterion::Criterion;
+use minio::s3::builders::{ObjectContent, PutObject};
+use minio::s3::segmented_bytes::SegmentedBytes;
+use minio_common::rand_src::RandSrc;
+use minio_common::utils::rand_object_name;
+use tokio::task;
+
+pub(crate) fn bench_object_put(criterion: &mut Criterion) {
+    benchmark_s3_api(
+        "object_put",
+        criterion,
+        || async { Ctx2::new().await },
+        |ctx| {
+            let object_name: String = rand_object_name();
+            let size = 1024 * 1024_u64; // 1MB
+            let object_content = ObjectContent::new_from_stream(RandSrc::new(size), Some(size));
+
+            let data: SegmentedBytes = task::block_in_place(|| {
+                tokio::runtime::Runtime::new()?.block_on(object_content.to_segmented_bytes())
+            })
+            .unwrap();
+
+            PutObject::new(ctx.client.clone(), ctx.bucket.clone(), object_name, data)
+        },
+    )
+}

benches/s3/bench_object_retention.rs

@@ -13,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::common_benches::{Ctx2, benchmark_s3_api};
+use crate::common_benches::{Ctx2, benchmark_s3_api, skip_express_mode};
 
 use criterion::Criterion;
 use minio::s3::builders::{GetObjectRetention, SetObjectRetention};
@@ -22,39 +22,38 @@ use minio::s3::types::{RetentionMode, S3Api};
 use minio::s3::utils::utc_now;
 
 pub(crate) fn bench_set_object_retention(criterion: &mut Criterion) {
+    if skip_express_mode("bench_set_object_retention") {
+        return;
+    }
     benchmark_s3_api(
         "set_object_retention",
         criterion,
         || async { Ctx2::new_with_object(true).await },
         |ctx| {
-            SetObjectRetention::new(&ctx.bucket)
-                .client(&ctx.client)
-                .object(ctx.object.clone())
+            SetObjectRetention::new(ctx.client.clone(), ctx.bucket.clone(), ctx.object.clone())
                 .retention_mode(Some(RetentionMode::GOVERNANCE))
                 .retain_until_date(Some(utc_now() + chrono::Duration::days(1)))
         },
     )
 }
 pub(crate) fn bench_get_object_retention(criterion: &mut Criterion) {
+    if skip_express_mode("bench_get_object_retention") {
+        return;
+    }
     benchmark_s3_api(
         "get_object_retention",
         criterion,
         || async {
             let ctx = Ctx2::new_with_object(true).await;
-            let _resp: SetObjectRetentionResponse = SetObjectRetention::new(&ctx.bucket)
-                .client(&ctx.client)
-                .object(ctx.object.clone())
-                .retention_mode(Some(RetentionMode::GOVERNANCE))
-                .retain_until_date(Some(utc_now() + chrono::Duration::days(1)))
-                .send()
-                .await
-                .unwrap();
+            let _resp: SetObjectRetentionResponse =
+                SetObjectRetention::new(ctx.client.clone(), ctx.bucket.clone(), ctx.object.clone())
+                    .retention_mode(Some(RetentionMode::GOVERNANCE))
+                    .retain_until_date(Some(utc_now() + chrono::Duration::days(1)))
+                    .send()
+                    .await
+                    .unwrap();
             ctx
         },
-        |ctx| {
-            GetObjectRetention::new(&ctx.bucket)
-                .client(&ctx.client)
-                .object(ctx.object.clone())
-        },
+        |ctx| GetObjectRetention::new(ctx.client.clone(), ctx.bucket.clone(), ctx.object.clone()),
     )
 }

benches/s3/bench_object_tags.rs

@@ -13,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::common_benches::{Ctx2, benchmark_s3_api};
+use crate::common_benches::{Ctx2, benchmark_s3_api, skip_express_mode};
 
 use criterion::Criterion;
 use minio::s3::builders::{GetObjectTags, SetObjectTags};
@@ -22,37 +22,38 @@ use minio::s3::types::S3Api;
 use minio_common::example::create_tags_example;
 
 pub(crate) fn bench_set_object_tags(criterion: &mut Criterion) {
+    if skip_express_mode("bench_set_object_tags") {
+        return;
+    }
     benchmark_s3_api(
         "set_object_tags",
         criterion,
         || async { Ctx2::new_with_object(false).await },
         |ctx| {
-            SetObjectTags::new(&ctx.bucket)
-                .client(&ctx.client)
-                .object(ctx.object.clone())
+            SetObjectTags::new(ctx.client.clone(), ctx.bucket.clone(), ctx.object.clone())
                 .tags(create_tags_example())
         },
     )
 }
 pub(crate) fn bench_get_object_tags(criterion: &mut Criterion) {
+    if skip_express_mode("bench_get_object_tags") {
+        return;
+    }
     benchmark_s3_api(
         "get_object_tags",
         criterion,
         || async {
             let ctx = Ctx2::new_with_object(false).await;
-            let _resp: SetObjectTagsResponse = SetObjectTags::new(&ctx.bucket)
-                .client(&ctx.client)
-                .object(ctx.object.clone())
+
+            let _resp: SetObjectTagsResponse = ctx
+                .client
+                .set_object_tags(&ctx.bucket, &ctx.object)
                 .tags(create_tags_example())
                 .send()
                 .await
                 .unwrap();
             ctx
         },
-        |ctx| {
-            GetObjectTags::new(&ctx.bucket)
-                .client(&ctx.client)
-                .object(ctx.object.clone())
-        },
+        |ctx| GetObjectTags::new(ctx.client.clone(), ctx.bucket.clone(), ctx.object.clone()),
     )
 }

benches/s3/common_benches.rs

@@ -17,13 +17,14 @@ use criterion::Criterion;
 use minio::s3::Client;
 use minio::s3::error::Error;
 use minio::s3::response::{MakeBucketResponse, PutObjectContentResponse};
-use minio::s3::types::{FromS3Response, S3Api};
+use minio::s3::types::{FromS3Response, S3Api, S3Request};
 use minio_common::cleanup_guard::CleanupGuard;
 use minio_common::test_context::TestContext;
 use minio_common::utils::{
     get_bytes_from_response, get_response_from_bytes, rand_bucket_name, rand_object_name,
 };
 use std::env;
+
 use tokio::runtime::Runtime;
 
 pub(crate) struct Ctx2 {
@@ -67,7 +68,7 @@ impl Ctx2 {
             .send()
             .await
             .unwrap();
-        let cleanup = CleanupGuard::new(&ctx.client, &bucket_name);
+        let cleanup = CleanupGuard::new(ctx.client.clone(), &bucket_name);
         let object_name = rand_object_name();
         let data = bytes::Bytes::from("hello, world".to_string().into_bytes());
         let _resp: PutObjectContentResponse = ctx
@@ -90,7 +91,7 @@ impl Ctx2 {
     pub async fn new_aux(&mut self) -> String {
         let bucket_name: String = rand_bucket_name();
         self.aux_bucket = Some(bucket_name.clone());
-        self._aux_cleanup = Some(CleanupGuard::new(&self.client, &bucket_name));
+        self._aux_cleanup = Some(CleanupGuard::new(self.client.clone(), &bucket_name));
         let _resp: MakeBucketResponse = self
             .client
             .make_bucket(&bucket_name)
@@ -140,7 +141,7 @@ pub(crate) fn benchmark_s3_api<ApiType, GlobalSetupFuture>(
 
             // Per-iteration setup for initial request
             let api = per_iter_setup(&ctx);
-            let request = api.to_s3request().unwrap();
+            let request: S3Request = api.to_s3request().unwrap();
 
             // Execute the request to get a response, store the bytes for swift cloning
             let bytes: bytes::Bytes = rt.block_on(async {
@@ -165,3 +166,11 @@ pub(crate) fn benchmark_s3_api<ApiType, GlobalSetupFuture>(
 
     group.finish();
 }
+
+pub(crate) fn skip_express_mode(bench_name: &str) -> bool {
+    let skip = TestContext::new_from_env().client.is_minio_express();
+    if skip {
+        println!("Skipping benchmark '{}' (MinIO Express mode)", bench_name);
+    }
+    skip
+}

common/src/cleanup_guard.rs

@@ -15,6 +15,7 @@
 
 use async_std::future::timeout;
 use minio::s3::Client;
+
 use std::thread;
 
 /// Cleanup guard that removes the bucket when it is dropped
@@ -25,10 +26,10 @@ pub struct CleanupGuard {
 
 impl CleanupGuard {
     #[allow(dead_code)]
-    pub fn new(client: &Client, bucket_name: &str) -> Self {
+    pub fn new<S: Into<String>>(client: Client, bucket_name: S) -> Self {
         Self {
-            client: client.clone(),
-            bucket_name: bucket_name.to_string(),
+            client,
+            bucket_name: bucket_name.into(),
         }
     }
 }
@@ -57,7 +58,9 @@ impl Drop for CleanupGuard {
                         Ok(_) => {
                             //println!("Bucket {} removed successfully", bucket_name),
                         }
-                        Err(e) => println!("Error removing bucket {}: {:?}", bucket_name, e),
+                        Err(_e) => {
+                            //println!("Error removing bucket {}: {:?}", bucket_name, e)
+                        }
                     },
                     Err(_) => println!("Timeout after 60s while removing bucket {}", bucket_name),
                 }

common/src/example.rs

@@ -13,11 +13,13 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use minio::s3::args::PostPolicy;
+use chrono::{DateTime, Utc};
+use minio::s3::builders::PostPolicy;
 use minio::s3::types::{
-    AndOperator, Destination, Filter, LifecycleConfig, LifecycleRule, NotificationConfig,
-    ObjectLockConfig, PrefixFilterRule, QueueConfig, ReplicationConfig, ReplicationRule,
-    RetentionMode, SuffixFilterRule,
+    AndOperator, CsvInputSerialization, CsvOutputSerialization, Destination, FileHeaderInfo,
+    Filter, LifecycleConfig, LifecycleRule, NotificationConfig, ObjectLockConfig, PrefixFilterRule,
+    QueueConfig, QuoteFields, ReplicationConfig, ReplicationRule, RetentionMode, SelectRequest,
+    SuffixFilterRule,
 };
 use minio::s3::utils::utc_now;
 use std::collections::HashMap;
@@ -185,7 +187,7 @@ pub fn create_object_lock_config_example() -> ObjectLockConfig {
     ObjectLockConfig::new(RetentionMode::GOVERNANCE, Some(DURATION_DAYS), None).unwrap()
 }
 pub fn create_post_policy_example(bucket_name: &str, object_name: &str) -> PostPolicy {
-    let expiration = utc_now() + chrono::Duration::days(5);
+    let expiration: DateTime<Utc> = utc_now() + chrono::Duration::days(5);
 
     let mut policy = PostPolicy::new(&bucket_name, expiration).unwrap();
     policy.add_equals_condition("key", &object_name).unwrap();
@@ -194,3 +196,38 @@ pub fn create_post_policy_example(bucket_name: &str, object_name: &str) -> PostP
         .unwrap();
     policy
 }
+/// return (body, data)
+pub fn create_select_content_data() -> (String, String) {
+    let mut data = String::new();
+    data.push_str("1997,Ford,E350,\"ac, abs, moon\",3000.00\n");
+    data.push_str("1999,Chevy,\"Venture \"\"Extended Edition\"\"\",,4900.00\n");
+    data.push_str("1999,Chevy,\"Venture \"\"Extended Edition, Very Large\"\"\",,5000.00\n");
+    data.push_str("1996,Jeep,Grand Cherokee,\"MUST SELL!\n");
+    data.push_str("air, moon roof, loaded\",4799.00\n");
+    let body = String::from("Year,Make,Model,Description,Price\n") + &data;
+    (body, data)
+}
+pub fn create_select_content_request() -> SelectRequest {
+    let request = SelectRequest::new_csv_input_output(
+        "select * from S3Object",
+        CsvInputSerialization {
+            compression_type: None,
+            allow_quoted_record_delimiter: false,
+            comments: None,
+            field_delimiter: None,
+            file_header_info: Some(FileHeaderInfo::USE),
+            quote_character: None,
+            quote_escape_character: None,
+            record_delimiter: None,
+        },
+        CsvOutputSerialization {
+            field_delimiter: None,
+            quote_character: None,
+            quote_escape_character: None,
+            quote_fields: Some(QuoteFields::ASNEEDED),
+            record_delimiter: None,
+        },
+    )
+    .unwrap();
+    request
+}

common/src/test_context.rs

@@ -23,12 +23,12 @@ use std::path::{Path, PathBuf};
 
 #[derive(Clone)]
 pub struct TestContext {
+    pub client: Client,
     pub base_url: BaseUrl,
     pub access_key: String,
     pub secret_key: String,
     pub ignore_cert_check: Option<bool>,
     pub ssl_cert_file: Option<PathBuf>,
-    pub client: Client,
 }
 
 impl TestContext {
@@ -66,12 +66,12 @@ impl TestContext {
             .unwrap();
 
             Self {
+                client,
                 base_url,
                 access_key,
                 secret_key,
                 ignore_cert_check: Some(ignore_cert_check),
                 ssl_cert_file: ssl_cert_file.map(PathBuf::from),
-                client,
             }
         } else {
             const DEFAULT_SERVER_ENDPOINT: &str = "https://play.min.io/";
@@ -123,12 +123,12 @@ impl TestContext {
             .unwrap();
 
             Self {
+                client,
                 base_url,
                 access_key,
                 secret_key,
                 ignore_cert_check: Some(ignore_cert_check),
                 ssl_cert_file: Some(ssl_cert_file),
-                client,
             }
         }
     }
@@ -144,7 +144,7 @@ impl TestContext {
     /// - `CleanupGuard` - A guard that automatically deletes the bucket when dropped.
     ///
     /// # Example
-    /// ```rust
+    /// ```ignore
     /// let (bucket_name, guard) = client.create_bucket_helper().await;
     /// println!("Created temporary bucket: {}", bucket_name);
     /// // The bucket will be removed when `guard` is dropped.
@@ -152,7 +152,7 @@ impl TestContext {
     pub async fn create_bucket_helper(&self) -> (String, CleanupGuard) {
         let bucket_name = rand_bucket_name();
         let _resp = self.client.make_bucket(&bucket_name).send().await.unwrap();
-        let guard = CleanupGuard::new(&self.client, &bucket_name);
+        let guard = CleanupGuard::new(self.client.clone(), &bucket_name);
         (bucket_name, guard)
     }
 }

common/src/utils.rs

@@ -24,7 +24,7 @@ pub fn rand_bucket_name() -> String {
 }
 
 pub fn rand_object_name() -> String {
-    Alphanumeric.sample_string(&mut rand::thread_rng(), 8)
+    Alphanumeric.sample_string(&mut rand::thread_rng(), 20)
 }
 
 pub async fn get_bytes_from_response(v: Result<reqwest::Response, Error>) -> bytes::Bytes {

examples/append_object.rs

@@ -0,0 +1,85 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+mod common;
+
+use crate::common::{create_bucket_if_not_exists, create_client_on_localhost};
+use minio::s3::Client;
+use minio::s3::response::{AppendObjectResponse, StatObjectResponse};
+use minio::s3::segmented_bytes::SegmentedBytes;
+use minio::s3::types::S3Api;
+use rand::Rng;
+use rand::distributions::Alphanumeric;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    env_logger::init(); // Note: set environment variable RUST_LOG="INFO" to log info and higher
+    let client: Client = create_client_on_localhost()?;
+
+    if !client.is_minio_express() {
+        println!("Need (MinIO) Express mode to run this example");
+        return Ok(());
+    }
+
+    let bucket_name: &str = "append-test-bucket";
+    create_bucket_if_not_exists(bucket_name, &client).await?;
+
+    let object_name: &str = "append-test-object";
+
+    let n_segments = 1000;
+    let segment_size = 1024 * 1024; // 1 KB
+    let mut offset_bytes = 0;
+
+    for i in 0..n_segments {
+        let rand_str: String = random_string(segment_size);
+
+        let data_size = rand_str.len() as u64;
+        let data: SegmentedBytes = SegmentedBytes::from(rand_str);
+
+        let resp: AppendObjectResponse = client
+            .append_object(bucket_name, object_name, data, offset_bytes)
+            .send()
+            .await?;
+
+        offset_bytes += data_size;
+        if resp.object_size != offset_bytes {
+            panic!(
+                "from the append_object: size mismatch: expected {}, got {}",
+                resp.object_size, offset_bytes
+            )
+        }
+        //println!("Append response: {:#?}", resp);
+
+        let resp: StatObjectResponse = client.stat_object(bucket_name, object_name).send().await?;
+        if resp.size != offset_bytes {
+            panic!(
+                "from the stat_Object: size mismatch: expected {}, got {}",
+                resp.size, offset_bytes
+            )
+        }
+        println!("{}/{}", i, n_segments);
+        //println!("Stat response: {:#?}", resp);
+    }
+
+    Ok(())
+}
+
+fn random_string(len: usize) -> String {
+    rand::thread_rng()
+        .sample_iter(&Alphanumeric)
+        .take(len)
+        .map(char::from)
+        .collect()
+}

examples/common.rs

@@ -21,6 +21,19 @@ pub fn create_client_on_play() -> Result<Client, Box<dyn std::error::Error + Sen
     Ok(client)
 }
 
+#[allow(dead_code)]
+pub fn create_client_on_localhost() -> Result<Client, Box<dyn std::error::Error + Send + Sync>> {
+    let base_url = "http://localhost:9000/".parse::<BaseUrl>()?;
+    log::info!("Trying to connect to MinIO at: `{:?}`", base_url);
+
+    let static_provider = StaticProvider::new("minioadmin", "minioadmin", None);
+
+    let client = ClientBuilder::new(base_url.clone())
+        .provider(Some(Box::new(static_provider)))
+        .build()?;
+    Ok(client)
+}
+
 pub async fn create_bucket_if_not_exists(
     bucket_name: &str,
     client: &Client,

examples/object_prompt.rs

@@ -16,10 +16,11 @@
 mod common;
 
 use crate::common::create_bucket_if_not_exists;
-use minio::s3::builders::{ObjectContent, ObjectPrompt};
+use minio::s3::builders::ObjectContent;
 use minio::s3::client::ClientBuilder;
 use minio::s3::creds::StaticProvider;
 use minio::s3::http::BaseUrl;
+use minio::s3::response::ObjectPromptResponse;
 use minio::s3::types::S3Api;
 use std::path::Path;
 
@@ -65,12 +66,13 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
         filename.display()
     );
 
-    let op = ObjectPrompt::new(bucket_name, object_name, "what is it about?")
+    let resp: ObjectPromptResponse = client
+        .object_prompt(bucket_name, object_name, "what is it about?")
         //.lambda_arn("arn:minio:s3-object-lambda::_:webhook") // this is the default value
-        .client(&client);
+        .send()
+        .await?;
 
-    let res = op.send().await?;
-    log::info!("Object prompt result: '{}'", res.prompt_response);
+    log::info!("Object prompt result: '{}'", resp.prompt_response);
 
     Ok(())
 }

examples/put_object.rs

@@ -17,7 +17,7 @@ use clap::Parser;
 use log::info;
 use minio::s3::response::BucketExistsResponse;
 use minio::s3::types::S3Api;
-use minio::s3::{builders::ObjectContent, client::ClientBuilder, creds::StaticProvider};
+use minio::s3::{Client, builders::ObjectContent, client::ClientBuilder, creds::StaticProvider};
 use std::path::PathBuf;
 
 /// Upload a file to the given bucket and object path on the MinIO Play server.
@@ -41,7 +41,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
         None,
     );
 
-    let client = ClientBuilder::new("https://play.min.io".parse()?)
+    let client: Client = ClientBuilder::new("https://play.min.io".parse()?)
         .provider(Some(Box::new(static_provider)))
         .build()?;
 

src/s3/builders.rs

@@ -15,8 +15,10 @@
 
 //! Argument builders for [minio::s3::client::Client](crate::s3::client::Client) APIs
 
+mod append_object;
 mod bucket_common;
 mod bucket_exists;
+mod copy_object;
 mod delete_bucket_encryption;
 mod delete_bucket_lifecycle;
 mod delete_bucket_notification;
@@ -38,16 +40,19 @@ mod get_object;
 mod get_object_lock_config;
 mod get_object_retention;
 mod get_object_tags;
+mod get_presigned_object_url;
+mod get_presigned_policy_form_data;
+mod get_region;
 mod is_object_legal_hold_enabled;
 mod list_buckets;
 mod list_objects;
 mod listen_bucket_notification;
 mod make_bucket;
-mod object_content;
 mod object_prompt;
 mod put_object;
 mod remove_bucket;
 mod remove_objects;
+mod select_object_content;
 mod set_bucket_encryption;
 mod set_bucket_lifecycle;
 mod set_bucket_notification;
@@ -58,9 +63,13 @@ mod set_bucket_versioning;
 mod set_object_lock_config;
 mod set_object_retention;
 mod set_object_tags;
+mod stat_object;
 
+pub use crate::s3::object_content::*;
+pub use append_object::*;
 pub use bucket_common::*;
 pub use bucket_exists::*;
+pub use copy_object::*;
 pub use delete_bucket_encryption::*;
 pub use delete_bucket_lifecycle::*;
 pub use delete_bucket_notification::*;
@@ -82,16 +91,19 @@ pub use get_object::*;
 pub use get_object_lock_config::*;
 pub use get_object_retention::*;
 pub use get_object_tags::*;
+pub use get_presigned_object_url::*;
+pub use get_presigned_policy_form_data::*;
+pub use get_region::*;
 pub use is_object_legal_hold_enabled::*;
 pub use list_buckets::*;
 pub use list_objects::*;
 pub use listen_bucket_notification::*;
 pub use make_bucket::*;
-pub use object_content::*;
 pub use object_prompt::*;
 pub use put_object::*;
 pub use remove_bucket::*;
 pub use remove_objects::*;
+pub use select_object_content::*;
 pub use set_bucket_encryption::*;
 pub use set_bucket_lifecycle::*;
 pub use set_bucket_notification::*;
@@ -102,3 +114,4 @@ pub use set_bucket_versioning::*;
 pub use set_object_lock_config::*;
 pub use set_object_retention::*;
 pub use set_object_tags::*;
+pub use stat_object::*;

src/s3/builders/append_object.rs

@@ -0,0 +1,331 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::s3::Client;
+use crate::s3::builders::{
+    ContentStream, MAX_MULTIPART_COUNT, ObjectContent, Size, calc_part_info,
+};
+use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
+use crate::s3::response::{AppendObjectResponse, StatObjectResponse};
+use crate::s3::segmented_bytes::SegmentedBytes;
+use crate::s3::sse::Sse;
+use crate::s3::types::{S3Api, S3Request, ToS3Request};
+use crate::s3::utils::{check_bucket_name, check_object_name};
+use http::Method;
+use std::sync::Arc;
+
+// region: append-object
+#[derive(Debug, Clone, Default)]
+pub struct AppendObject {
+    client: Client,
+
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    bucket: String,
+    object: String,
+
+    region: Option<String>,
+    sse: Option<Arc<dyn Sse>>,
+    data: SegmentedBytes,
+
+    /// value of x-amz-write-offset-bytes
+    offset_bytes: u64,
+}
+
+impl AppendObject {
+    pub fn new(
+        client: Client,
+        bucket: String,
+        object: String,
+        data: SegmentedBytes,
+        offset_bytes: u64,
+    ) -> Self {
+        Self {
+            client,
+            bucket,
+            object,
+            offset_bytes,
+            data,
+            ..Default::default()
+        }
+    }
+
+    pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
+        self.extra_headers = extra_headers;
+        self
+    }
+
+    pub fn extra_query_params(mut self, extra_query_params: Option<Multimap>) -> Self {
+        self.extra_query_params = extra_query_params;
+        self
+    }
+}
+
+impl S3Api for AppendObject {
+    type S3Response = AppendObjectResponse;
+}
+
+impl ToS3Request for AppendObject {
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        {
+            check_bucket_name(&self.bucket, true)?;
+            check_object_name(&self.object)?;
+
+            if let Some(v) = &self.sse {
+                if v.tls_required() && !self.client.is_secure() {
+                    return Err(Error::SseTlsRequired(None));
+                }
+            }
+        }
+
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
+        headers.add("x-amz-write-offset-bytes", self.offset_bytes.to_string());
+
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(self.extra_query_params.unwrap_or_default())
+            .object(Some(self.object))
+            .headers(headers)
+            .body(Some(self.data)))
+    }
+}
+// endregion: append-object
+
+// region: append-object-content
+
+/// AppendObjectContent takes a `ObjectContent` stream and appends it to MinIO/S3.
+///
+/// It is a higher level API and handles multipart appends transparently.
+pub struct AppendObjectContent {
+    client: Client,
+
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
+    object: String,
+    sse: Option<Arc<dyn Sse>>,
+    part_size: Size,
+
+    // source data
+    input_content: ObjectContent,
+
+    // Computed.
+    content_stream: ContentStream,
+    part_count: Option<u16>,
+
+    /// Value of x-amz-write-offset-bytes
+    offset_bytes: u64,
+}
+
+impl AppendObjectContent {
+    pub fn new(
+        client: Client,
+        bucket: String,
+        object: String,
+        content: impl Into<ObjectContent>,
+    ) -> Self {
+        Self {
+            client,
+            bucket,
+            object,
+            input_content: content.into(),
+            extra_headers: None,
+            extra_query_params: None,
+            region: None,
+            sse: None,
+            part_size: Size::Unknown,
+            content_stream: ContentStream::empty(),
+            part_count: None,
+            offset_bytes: 0,
+        }
+    }
+
+    pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
+        self.extra_headers = extra_headers;
+        self
+    }
+
+    pub fn extra_query_params(mut self, extra_query_params: Option<Multimap>) -> Self {
+        self.extra_query_params = extra_query_params;
+        self
+    }
+
+    pub fn region(mut self, region: Option<String>) -> Self {
+        self.region = region;
+        self
+    }
+
+    pub fn part_size(mut self, part_size: impl Into<Size>) -> Self {
+        self.part_size = part_size.into();
+        self
+    }
+
+    pub fn offset_bytes(mut self, offset_bytes: u64) -> Self {
+        self.offset_bytes = offset_bytes;
+        self
+    }
+
+    pub async fn send(mut self) -> Result<AppendObjectResponse, Error> {
+        {
+            check_bucket_name(&self.bucket, true)?;
+            check_object_name(&self.object)?;
+            if let Some(v) = &self.sse {
+                if v.tls_required() && !self.client.is_secure() {
+                    return Err(Error::SseTlsRequired(None));
+                }
+            }
+        }
+
+        {
+            let mut headers: Multimap = match self.extra_headers {
+                Some(ref headers) => headers.clone(),
+                None => Multimap::new(),
+            };
+            headers.add("x-amz-write-offset-bytes", self.offset_bytes.to_string());
+            self.extra_query_params = Some(headers);
+        }
+
+        self.content_stream = std::mem::take(&mut self.input_content)
+            .to_content_stream()
+            .await
+            .map_err(Error::IOError)?;
+
+        // object_size may be Size::Unknown.
+        let object_size = self.content_stream.get_size();
+
+        let (part_size, n_expected_parts) = calc_part_info(object_size, self.part_size)?;
+        // Set the chosen part size and part count.
+        self.part_size = Size::Known(part_size);
+        self.part_count = n_expected_parts;
+
+        // Read the first part.
+        let seg_bytes = self.content_stream.read_upto(part_size as usize).await?;
+
+        // get the length (if any) of the current file
+        let resp: StatObjectResponse = self
+            .client
+            .stat_object(&self.bucket, &self.object)
+            .send()
+            .await?;
+        //println!("statObjectResponse={:#?}", resp);
+
+        let current_file_size = resp.size;
+
+        // In the first part read, if:
+        //
+        //   - object_size is unknown AND we got less than the part size, OR
+        //   - we are expecting only one part to be uploaded,
+        //
+        // we upload it as a simple put object.
+        if (object_size.is_unknown() && (seg_bytes.len() as u64) < part_size)
+            || n_expected_parts == Some(1)
+        {
+            let ao = AppendObject {
+                client: self.client,
+                extra_headers: self.extra_headers,
+                extra_query_params: self.extra_query_params,
+                bucket: self.bucket,
+                object: self.object,
+                region: self.region,
+                offset_bytes: current_file_size,
+                sse: self.sse,
+                data: seg_bytes,
+            };
+            ao.send().await
+        } else if object_size.is_known() && (seg_bytes.len() as u64) < part_size {
+            // Not enough data!
+            let expected = object_size.as_u64().unwrap();
+            let got = seg_bytes.len() as u64;
+            Err(Error::InsufficientData(expected, got))
+        } else {
+            // Otherwise, we start a multipart append.
+            self.send_mpa(part_size, current_file_size, seg_bytes).await
+        }
+    }
+
+    /// multipart append
+    async fn send_mpa(
+        &mut self,
+        part_size: u64,
+        object_size: u64,
+        first_part: SegmentedBytes,
+    ) -> Result<AppendObjectResponse, Error> {
+        let mut done = false;
+        let mut part_number = 0;
+
+        let mut last_resp: Option<AppendObjectResponse> = None;
+        let mut next_offset_bytes: u64 = object_size;
+        //println!("initial offset_bytes: {}", next_offset_bytes);
+
+        let mut first_part = Some(first_part);
+        while !done {
+            let part_content: SegmentedBytes = {
+                if let Some(v) = first_part.take() {
+                    v
+                } else {
+                    self.content_stream.read_upto(part_size as usize).await?
+                }
+            };
+            part_number += 1;
+            let buffer_size = part_content.len() as u64;
+
+            assert!(
+                buffer_size <= part_size,
+                "{:?} <= {:?}",
+                buffer_size,
+                part_size
+            );
+
+            if buffer_size == 0 && part_number > 1 {
+                // We are done as we appended at least 1 part and we have
+                // reached the end of the stream.
+                break;
+            }
+
+            // Check if we have too many parts to upload.
+            if self.part_count.is_none() && part_number > MAX_MULTIPART_COUNT {
+                return Err(Error::TooManyParts);
+            }
+
+            // Append the part now.
+            let append_object = AppendObject {
+                client: self.client.clone(),
+                extra_headers: self.extra_headers.clone(),
+                extra_query_params: self.extra_query_params.clone(),
+                bucket: self.bucket.clone(),
+                object: self.object.clone(),
+                region: self.region.clone(),
+                sse: self.sse.clone(),
+                data: part_content,
+                offset_bytes: next_offset_bytes,
+            };
+            let resp: AppendObjectResponse = append_object.send().await?;
+            //println!("AppendObjectResponse: object_size={:?}", resp.object_size);
+
+            next_offset_bytes = resp.object_size;
+
+            // Finally check if we are done.
+            if buffer_size < part_size {
+                done = true;
+                last_resp = Some(resp);
+            }
+        }
+        Ok(last_resp.unwrap())
+    }
+}
+// endregion: append-object-content

src/s3/builders/bucket_common.rs

@@ -15,11 +15,12 @@
 
 use std::marker::PhantomData;
 
-use crate::s3::{client::Client, utils::Multimap};
+use crate::s3::client::Client;
+use crate::s3::multimap::Multimap;
 
-#[derive(Clone, Debug, Default)]
+#[derive(Clone, Default)]
 pub struct BucketCommon<A> {
-    pub(crate) client: Option<Client>,
+    pub(crate) client: Client,
 
     pub(crate) extra_headers: Option<Multimap>,
     pub(crate) extra_query_params: Option<Multimap>,
@@ -30,18 +31,14 @@ pub struct BucketCommon<A> {
 }
 
 impl<A: Default> BucketCommon<A> {
-    pub fn new(bucket: &str) -> BucketCommon<A> {
+    pub fn new(client: Client, bucket: String) -> BucketCommon<A> {
         BucketCommon {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self

src/s3/builders/bucket_exists.rs

@@ -13,7 +13,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::BucketExistsResponse;
@@ -32,30 +31,13 @@ impl S3Api for BucketExists {
 }
 
 impl ToS3Request for BucketExists {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::HEAD)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::HEAD)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(self.extra_query_params.unwrap_or_default())
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/delete_bucket_encryption.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::DeleteBucketEncryptionResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [delete_bucket_encryption()](Client::delete_bucket_encryption) API
@@ -32,32 +31,13 @@ impl S3Api for DeleteBucketEncryption {
 }
 
 impl ToS3Request for DeleteBucketEncryption {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert("encryption".into(), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::DELETE)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::DELETE)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "encryption"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/delete_bucket_lifecycle.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::DeleteBucketLifecycleResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [delete_bucket_lifecycle()](Client::delete_bucket_lifecycle) API
@@ -32,32 +31,13 @@ impl S3Api for DeleteBucketLifecycle {
 }
 
 impl ToS3Request for DeleteBucketLifecycle {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert("lifecycle".into(), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::DELETE)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::DELETE)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "lifecycle"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/delete_bucket_notification.rs

@@ -13,12 +13,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
-use crate::s3::builders::{BucketCommon, SegmentedBytes};
+use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::DeleteBucketNotificationResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{NotificationConfig, S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use bytes::Bytes;
 use http::Method;
 
@@ -33,24 +33,9 @@ impl S3Api for DeleteBucketNotification {
 }
 
 impl ToS3Request for DeleteBucketNotification {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("notification"), String::new());
-
         const CONFIG: NotificationConfig = NotificationConfig {
             cloud_func_config_list: None,
             queue_config_list: None,
@@ -60,15 +45,11 @@ impl ToS3Request for DeleteBucketNotification {
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(bytes));
         //TODO consider const body
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "notification"))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/delete_bucket_policy.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::DeleteBucketPolicyResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [delete_bucket_policy()](Client::delete_bucket_policy) API
@@ -32,32 +31,13 @@ impl S3Api for DeleteBucketPolicy {
 }
 
 impl ToS3Request for DeleteBucketPolicy {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("policy"), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::DELETE)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::DELETE)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "policy"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/delete_bucket_replication.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::DeleteBucketReplicationResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [delete_bucket_replication()](Client::delete_bucket_replication) API
@@ -32,32 +31,13 @@ impl S3Api for DeleteBucketReplication {
 }
 
 impl ToS3Request for DeleteBucketReplication {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert("replication".into(), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::DELETE)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::DELETE)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "replication"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/delete_bucket_tags.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::DeleteBucketTagsResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [delete_bucket_tags()](Client::delete_bucket_tags) API
@@ -32,32 +31,13 @@ impl S3Api for DeleteBucketTags {
 }
 
 impl ToS3Request for DeleteBucketTags {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert("tagging".into(), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::DELETE)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::DELETE)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "tagging"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/delete_object_lock_config.rs

@@ -13,12 +13,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
-use crate::s3::builders::{BucketCommon, SegmentedBytes};
+use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::DeleteObjectLockConfigResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{ObjectLockConfig, S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use bytes::Bytes;
 use http::Method;
 
@@ -33,24 +33,9 @@ impl S3Api for DeleteObjectLockConfig {
 }
 
 impl ToS3Request for DeleteObjectLockConfig {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("object-lock"), String::new());
-
         let config = ObjectLockConfig {
             retention_mode: None,
             retention_duration_days: None,
@@ -60,15 +45,11 @@ impl ToS3Request for DeleteObjectLockConfig {
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(bytes));
         //TODO consider const body
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "object-lock"))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/delete_object_tags.rs

@@ -15,36 +15,35 @@
 
 use crate::s3::Client;
 use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::DeleteObjectTagsResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, check_object_name, insert};
 use http::Method;
 
 /// Argument builder for [delete_object_tags()](Client::delete_object_tags) API
 #[derive(Clone, Debug, Default)]
 pub struct DeleteObjectTags {
-    pub client: Option<Client>,
+    client: Client,
 
-    pub extra_headers: Option<Multimap>,
-    pub extra_query_params: Option<Multimap>,
-    pub region: Option<String>,
-    pub bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub object: String,
-    pub version_id: Option<String>,
+    object: String,
+    version_id: Option<String>,
 }
 
 impl DeleteObjectTags {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
+            object,
             ..Default::default()
         }
     }
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
 
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
@@ -61,11 +60,6 @@ impl DeleteObjectTags {
         self
     }
 
-    pub fn object(mut self, object: String) -> Self {
-        self.object = object;
-        self
-    }
-
     pub fn version_id(mut self, version_id: Option<String>) -> Self {
         self.version_id = version_id;
         self
@@ -77,36 +71,18 @@ impl S3Api for DeleteObjectTags {
 }
 
 impl ToS3Request for DeleteObjectTags {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
+        check_object_name(&self.object)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
+        let mut query_params: Multimap = insert(self.extra_query_params, "tagging");
+        query_params.add_version(self.version_id);
 
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-        query_params.insert("tagging".into(), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::DELETE)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
+        Ok(S3Request::new(self.client, Method::DELETE)
+            .region(self.region)
+            .bucket(Some(self.bucket))
             .query_params(query_params)
-            .object(Some(&self.object))
-            .headers(headers);
-
-        Ok(req)
+            .object(Some(self.object))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/disable_object_legal_hold.rs

@@ -14,41 +14,39 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::DisableObjectLegalHoldResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name, md5sum_hash};
+use crate::s3::utils::{check_bucket_name, check_object_name, insert, md5sum_hash};
 use bytes::Bytes;
 use http::Method;
 
 /// Argument builder for [disable_object_legal_hold()](Client::disable_object_legal_hold) API
 #[derive(Clone, Debug, Default)]
 pub struct DisableObjectLegalHold {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) object: String,
-    pub(crate) version_id: Option<String>,
+    object: String,
+    version_id: Option<String>,
 }
 
 impl DisableObjectLegalHold {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
+            object,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -59,11 +57,6 @@ impl DisableObjectLegalHold {
         self
     }
 
-    pub fn object(mut self, object: String) -> Self {
-        self.object = object;
-        self
-    }
-
     pub fn version_id(mut self, version_id: Option<String>) -> Self {
         self.version_id = version_id;
         self
@@ -75,42 +68,25 @@ impl S3Api for DisableObjectLegalHold {
 }
 
 impl ToS3Request for DisableObjectLegalHold {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
+        check_object_name(&self.object)?;
 
-        let mut headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-        query_params.insert(String::from("legal-hold"), String::new());
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
+        let mut query_params: Multimap = insert(self.extra_query_params, "legal-hold");
+        query_params.add_version(self.version_id);
 
         const PAYLOAD: &str = "<LegalHold><Status>OFF</Status></LegalHold>";
-        headers.insert(String::from("Content-MD5"), md5sum_hash(PAYLOAD.as_ref()));
+        headers.add("Content-MD5", md5sum_hash(PAYLOAD.as_ref()));
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(Bytes::from(PAYLOAD)));
         //TODO consider const body
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
             .query_params(query_params)
             .headers(headers)
-            .object(Some(&self.object))
-            .body(body);
-
-        Ok(req)
+            .object(Some(self.object))
+            .body(body))
     }
 }

src/s3/builders/enable_object_legal_hold.rs

@@ -14,41 +14,39 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::EnableObjectLegalHoldResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name, md5sum_hash};
+use crate::s3::utils::{check_bucket_name, check_object_name, insert, md5sum_hash};
 use bytes::Bytes;
 use http::Method;
 
 /// Argument builder for [enable_object_legal_hold()](Client::enable_object_legal_hold) API
 #[derive(Clone, Debug, Default)]
 pub struct EnableObjectLegalHold {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) object: String,
-    pub(crate) version_id: Option<String>,
+    object: String,
+    version_id: Option<String>,
 }
 
 impl EnableObjectLegalHold {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
+            object,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -59,11 +57,6 @@ impl EnableObjectLegalHold {
         self
     }
 
-    pub fn object(mut self, object: String) -> Self {
-        self.object = object;
-        self
-    }
-
     pub fn version_id(mut self, version_id: Option<String>) -> Self {
         self.version_id = version_id;
         self
@@ -75,42 +68,25 @@ impl S3Api for EnableObjectLegalHold {
 }
 
 impl ToS3Request for EnableObjectLegalHold {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
+        check_object_name(&self.object)?;
 
-        let mut headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-        query_params.insert(String::from("legal-hold"), String::new());
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
+        let mut query_params: Multimap = insert(self.extra_query_params, "legal-hold");
+        query_params.add_version(self.version_id);
 
         const PAYLOAD: &str = "<LegalHold><Status>ON</Status></LegalHold>";
-        headers.insert(String::from("Content-MD5"), md5sum_hash(PAYLOAD.as_ref()));
+        headers.add("Content-MD5", md5sum_hash(PAYLOAD.as_ref()));
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(Bytes::from(PAYLOAD)));
         //TODO consider const body
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
             .query_params(query_params)
             .headers(headers)
-            .object(Some(&self.object))
-            .body(body);
-
-        Ok(req)
+            .object(Some(self.object))
+            .body(body))
     }
 }

src/s3/builders/get_bucket_encryption.rs

@@ -17,7 +17,7 @@ use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::GetBucketEncryptionResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name, merge};
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [get_bucket_encryption()](crate::s3::client::Client::get_bucket_encryption) API
@@ -31,27 +31,13 @@ impl S3Api for GetBucketEncryption {
 }
 
 impl ToS3Request for GetBucketEncryption {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
-        }
 
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-        query_params.insert(String::from("encryption"), String::new());
-
-        let req = S3Request::new(
-            self.client.as_ref().ok_or(Error::NoClientProvided)?,
-            Method::GET,
-        )
-        .region(self.region.as_deref())
-        .bucket(Some(&self.bucket))
-        .query_params(query_params)
-        .headers(headers);
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "encryption"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_bucket_lifecycle.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::GetBucketLifecycleResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [get_bucket_lifecycle()](Client::get_bucket_lifecycle) API
@@ -32,32 +31,13 @@ impl S3Api for GetBucketLifecycle {
 }
 
 impl ToS3Request for GetBucketLifecycle {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert("lifecycle".into(), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "lifecycle"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_bucket_notification.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::GetBucketNotificationResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [get_bucket_notification()](Client::get_bucket_notification) API
@@ -32,32 +31,13 @@ impl S3Api for GetBucketNotification {
 }
 
 impl ToS3Request for GetBucketNotification {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert("notification".into(), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "notification"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_bucket_policy.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::GetBucketPolicyResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [get_bucket_policy()](Client::get_bucket_policy) API
@@ -32,32 +31,13 @@ impl S3Api for GetBucketPolicy {
 }
 
 impl ToS3Request for GetBucketPolicy {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("policy"), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "policy"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_bucket_replication.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::GetBucketReplicationResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [get_bucket_replication()](Client::get_bucket_replication) API
@@ -32,32 +31,13 @@ impl S3Api for GetBucketReplication {
 }
 
 impl ToS3Request for GetBucketReplication {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("replication"), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "replication"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_bucket_tags.rs

@@ -15,38 +15,35 @@
 
 use crate::s3::Client;
 use crate::s3::error::Error;
+use crate::s3::multimap::Multimap;
 use crate::s3::response::GetBucketTagsResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 use std::collections::HashMap;
 
 /// Argument builder for [get_bucket_tags()](crate::s3::client::Client::get_bucket_tags) API
 #[derive(Clone, Debug, Default)]
 pub struct GetBucketTags {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) tags: HashMap<String, String>,
+    tags: HashMap<String, String>,
 }
 
 impl GetBucketTags {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -73,32 +70,13 @@ impl S3Api for GetBucketTags {
 }
 
 impl ToS3Request for GetBucketTags {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("tagging"), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "tagging"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_bucket_versioning.rs

@@ -17,7 +17,7 @@ use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::GetBucketVersioningResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name, merge};
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [get_bucket_versioning()](crate::s3::client::Client::get_bucket_versioning) API
@@ -31,27 +31,13 @@ impl S3Api for GetBucketVersioning {
 }
 
 impl ToS3Request for GetBucketVersioning {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
-        }
 
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-        query_params.insert(String::from("versioning"), String::new());
-
-        let req = S3Request::new(
-            self.client.as_ref().ok_or(Error::NoClientProvided)?,
-            Method::GET,
-        )
-        .region(self.region.as_deref())
-        .bucket(Some(&self.bucket))
-        .query_params(query_params)
-        .headers(headers);
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "versioning"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_object.rs

@@ -15,19 +15,21 @@
 
 use http::Method;
 
+use crate::s3::multimap::{Multimap, MultimapExt};
+use crate::s3::utils::check_object_name;
 use crate::s3::{
     client::Client,
     error::Error,
     response::GetObjectResponse,
     sse::{Sse, SseCustomerKey},
     types::{S3Api, S3Request, ToS3Request},
-    utils::{Multimap, UtcTime, check_bucket_name, merge, to_http_header_value},
+    utils::{UtcTime, check_bucket_name, to_http_header_value},
 };
 
 /// Argument builder for [list_objects()](Client::get_object) API.
 #[derive(Debug, Clone, Default)]
 pub struct GetObject {
-    client: Option<Client>,
+    client: Client,
 
     extra_headers: Option<Multimap>,
     extra_query_params: Option<Multimap>,
@@ -46,21 +48,16 @@ pub struct GetObject {
     unmodified_since: Option<UtcTime>,
 }
 
-// builder interface
 impl GetObject {
-    pub fn new(bucket: &str, object: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
         Self {
-            bucket: bucket.to_string(),
-            object: object.to_string(),
+            client,
+            bucket,
+            object,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -117,99 +114,69 @@ impl GetObject {
     }
 }
 
-// internal helpers
-impl GetObject {
-    fn get_range_header_value(&self) -> Option<String> {
-        let (offset, length) = match self.length {
-            Some(_) => (Some(self.offset.unwrap_or(0_u64)), self.length),
-            None => (self.offset, None),
-        };
-
-        if let Some(o) = offset {
-            let mut range = String::new();
-            range.push_str("bytes=");
-            range.push_str(&o.to_string());
-            range.push('-');
-            if let Some(l) = length {
-                range.push_str(&(o + l - 1).to_string());
-            }
-            Some(range)
-        } else {
-            None
-        }
-    }
-
-    fn get_headers(&self) -> Multimap {
-        let mut headers = Multimap::new();
-
-        if let Some(val) = self.get_range_header_value() {
-            headers.insert(String::from("Range"), val);
-        }
-
-        if let Some(v) = &self.match_etag {
-            headers.insert(String::from("if-match"), v.to_string());
-        }
-
-        if let Some(v) = &self.not_match_etag {
-            headers.insert(String::from("if-none-match"), v.to_string());
-        }
-
-        if let Some(v) = self.modified_since {
-            headers.insert(String::from("if-modified-since"), to_http_header_value(v));
-        }
-
-        if let Some(v) = self.unmodified_since {
-            headers.insert(String::from("if-unmodified-since"), to_http_header_value(v));
-        }
-
-        if let Some(v) = &self.ssec {
-            merge(&mut headers, &v.headers());
-        }
-
-        headers
-    }
-}
-
-impl ToS3Request for GetObject {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
-        check_bucket_name(&self.bucket, true)?;
-
-        if self.object.is_empty() {
-            return Err(Error::InvalidObjectName(String::from(
-                "object name cannot be empty",
-            )));
-        }
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        if self.ssec.is_some() && !client.is_secure() {
-            return Err(Error::SseTlsRequired(None));
-        }
-
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
-        }
-        merge(&mut headers, &self.get_headers());
-
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .object(Some(&self.object))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
-    }
-}
-
 impl S3Api for GetObject {
     type S3Response = GetObjectResponse;
 }
+
+impl ToS3Request for GetObject {
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        {
+            check_bucket_name(&self.bucket, true)?;
+            check_object_name(&self.object)?;
+            if self.ssec.is_some() && !self.client.is_secure() {
+                return Err(Error::SseTlsRequired(None));
+            }
+        }
+
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
+        {
+            {
+                let (offset, length): (Option<u64>, Option<u64>) = match self.length {
+                    Some(_) => (Some(self.offset.unwrap_or(0_u64)), self.length),
+                    None => (self.offset, None),
+                };
+
+                if let Some(o) = offset {
+                    let mut range: String = String::new();
+                    range.push_str("bytes=");
+                    range.push_str(&o.to_string());
+                    range.push('-');
+                    if let Some(l) = length {
+                        range.push_str(&(o + l - 1).to_string());
+                    }
+                    headers.add("Range", range);
+                }
+            }
+
+            if let Some(v) = self.match_etag {
+                headers.add("if-match", v);
+            }
+
+            if let Some(v) = self.not_match_etag {
+                headers.add("if-none-match", v);
+            }
+
+            if let Some(v) = self.modified_since {
+                headers.add("if-modified-since", to_http_header_value(v));
+            }
+
+            if let Some(v) = self.unmodified_since {
+                headers.add("if-unmodified-since", to_http_header_value(v));
+            }
+
+            if let Some(v) = &self.ssec {
+                headers.add_multimap(v.headers());
+            }
+        }
+
+        let mut query_params: Multimap = self.extra_query_params.unwrap_or_default();
+        query_params.add_version(self.version_id);
+
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .object(Some(self.object))
+            .query_params(query_params)
+            .headers(headers))
+    }
+}

src/s3/builders/get_object_lock_config.rs

@@ -13,12 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::GetObjectLockConfigResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::check_bucket_name;
+use crate::s3::utils::{check_bucket_name, insert};
 use http::Method;
 
 /// Argument builder for [get_object_lock_config()](Client::get_object_lock_config) API
@@ -32,32 +31,13 @@ impl S3Api for GetObjectLockConfig {
 }
 
 impl ToS3Request for GetObjectLockConfig {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("object-lock"), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "object-lock"))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_object_retention.rs

@@ -15,36 +15,35 @@
 
 use crate::s3::Client;
 use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::GetObjectRetentionResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, check_object_name, insert};
 use http::Method;
 
 /// Argument builder for [get_object_retention()](Client::get_object_retention) API
 #[derive(Clone, Debug, Default)]
 pub struct GetObjectRetention {
-    pub client: Option<Client>,
+    client: Client,
 
-    pub extra_headers: Option<Multimap>,
-    pub extra_query_params: Option<Multimap>,
-    pub region: Option<String>,
-    pub bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub object: String,
-    pub version_id: Option<String>,
+    object: String,
+    version_id: Option<String>,
 }
 
 impl GetObjectRetention {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
+            object,
             ..Default::default()
         }
     }
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
 
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
@@ -61,11 +60,6 @@ impl GetObjectRetention {
         self
     }
 
-    pub fn object(mut self, object: String) -> Self {
-        self.object = object;
-        self
-    }
-
     pub fn version_id(mut self, version_id: Option<String>) -> Self {
         self.version_id = version_id;
         self
@@ -77,36 +71,18 @@ impl S3Api for GetObjectRetention {
 }
 
 impl ToS3Request for GetObjectRetention {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
+        check_object_name(&self.object)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
+        let mut query_params: Multimap = insert(self.extra_query_params, "retention");
+        query_params.add_version(self.version_id);
 
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-        query_params.insert(String::from("retention"), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
             .query_params(query_params)
-            .headers(headers)
-            .object(Some(&self.object));
-
-        Ok(req)
+            .object(Some(self.object))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_object_tags.rs

@@ -15,36 +15,35 @@
 
 use crate::s3::Client;
 use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::GetObjectTagsResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, check_object_name, insert};
 use http::Method;
 
 /// Argument builder for [get_object_tags()](Client::get_object_tags) API
 #[derive(Clone, Debug, Default)]
 pub struct GetObjectTags {
-    pub client: Option<Client>,
+    client: Client,
 
-    pub extra_headers: Option<Multimap>,
-    pub extra_query_params: Option<Multimap>,
-    pub region: Option<String>,
-    pub bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub object: String,
-    pub version_id: Option<String>,
+    object: String,
+    version_id: Option<String>,
 }
 
 impl GetObjectTags {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
+            object,
             ..Default::default()
         }
     }
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
 
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
@@ -61,11 +60,6 @@ impl GetObjectTags {
         self
     }
 
-    pub fn object(mut self, object: String) -> Self {
-        self.object = object;
-        self
-    }
-
     pub fn version_id(mut self, version_id: Option<String>) -> Self {
         self.version_id = version_id;
         self
@@ -77,36 +71,18 @@ impl S3Api for GetObjectTags {
 }
 
 impl ToS3Request for GetObjectTags {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
+        check_object_name(&self.object)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
+        let mut query_params: Multimap = insert(self.extra_query_params, "tagging");
+        query_params.add_version(self.version_id);
 
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-        query_params.insert("tagging".into(), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
             .query_params(query_params)
-            .object(Some(&self.object))
-            .headers(headers);
-
-        Ok(req)
+            .object(Some(self.object))
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/get_presigned_object_url.rs

@@ -0,0 +1,106 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::s3::Client;
+use crate::s3::client::DEFAULT_EXPIRY_SECONDS;
+use crate::s3::creds::Credentials;
+use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
+use crate::s3::response::GetPresignedObjectUrlResponse;
+use crate::s3::signer::presign_v4;
+use crate::s3::utils::{UtcTime, check_bucket_name, check_object_name, utc_now};
+use http::Method;
+
+/// Argument for [get_presigned_object_url()](crate::s3::client::Client::get_presigned_object_url) API
+#[derive(Clone, Debug, Default)]
+pub struct GetPresignedObjectUrl {
+    client: Client,
+
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
+
+    object: String,
+    version_id: Option<String>,
+    method: Method,
+    expiry_seconds: Option<u32>,
+    request_time: Option<UtcTime>,
+}
+
+impl GetPresignedObjectUrl {
+    pub fn new(client: Client, bucket: String, object: String, method: Method) -> Self {
+        Self {
+            client,
+            bucket,
+            object,
+            method,
+            expiry_seconds: Some(DEFAULT_EXPIRY_SECONDS),
+            ..Default::default()
+        }
+    }
+
+    pub async fn send(self) -> Result<GetPresignedObjectUrlResponse, Error> {
+        // NOTE: this send function is async to be comparable with other functions...
+        check_bucket_name(&self.bucket, true)?;
+        check_object_name(&self.object)?;
+
+        let region: String = self.client.get_region_cached(&self.bucket, &self.region)?;
+
+        let mut query_params: Multimap = self.extra_query_params.unwrap_or_default();
+        query_params.add_version(self.version_id.clone());
+
+        let mut url = self.client.shared.base_url.build_url(
+            &self.method,
+            &region,
+            &query_params,
+            Some(&self.bucket),
+            Some(&self.object),
+        )?;
+
+        if let Some(p) = &self.client.shared.provider {
+            let creds: Credentials = p.fetch();
+            if let Some(t) = creds.session_token {
+                query_params.add("X-Amz-Security-Token", t);
+            }
+
+            let date = match self.request_time {
+                Some(v) => v,
+                _ => utc_now(),
+            };
+
+            presign_v4(
+                &self.method,
+                &url.host_header_value(),
+                &url.path,
+                &region,
+                &mut query_params,
+                &creds.access_key,
+                &creds.secret_key,
+                date,
+                self.expiry_seconds.unwrap_or(DEFAULT_EXPIRY_SECONDS),
+            );
+
+            url.query = query_params;
+        }
+
+        Ok(GetPresignedObjectUrlResponse {
+            region,
+            bucket: self.bucket,
+            object: self.object,
+            version_id: self.version_id,
+            url: url.to_string(),
+        })
+    }
+}

src/s3/builders/get_presigned_policy_form_data.rs

@@ -0,0 +1,347 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::s3::Client;
+use crate::s3::creds::Credentials;
+use crate::s3::error::Error;
+use crate::s3::signer::post_presign_v4;
+use crate::s3::utils::{
+    UtcTime, b64encode, check_bucket_name, to_amz_date, to_iso8601utc, to_signer_date, utc_now,
+};
+use serde_json::{Value, json};
+use std::collections::HashMap;
+
+/// Argument for [get_presigned_object_url()](crate::s3::client::Client::get_presigned_object_url) API
+pub struct GetPresignedPolicyFormData {
+    client: Client,
+    policy: PostPolicy,
+}
+
+impl GetPresignedPolicyFormData {
+    pub fn new(client: Client, policy: PostPolicy) -> Self {
+        Self { client, policy }
+    }
+
+    pub async fn send(self) -> Result<HashMap<String, String>, Error> {
+        // NOTE: this send function is async to be comparable with other functions...
+        let region: String = self
+            .client
+            .get_region_cached(&self.policy.bucket, &self.policy.region)?;
+
+        let creds: Credentials = self.client.shared.provider.as_ref().unwrap().fetch();
+        self.policy.form_data(
+            creds.access_key,
+            creds.secret_key,
+            creds.session_token,
+            region,
+        )
+    }
+}
+
+/// Post policy information for presigned post policy form-data
+///
+/// Condition elements and respective condition for Post policy is available <a
+/// href="https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-HTTPPOSTConstructPolicy.html#sigv4-PolicyConditions">here</a>.
+pub struct PostPolicy {
+    pub region: Option<String>,
+    pub bucket: String,
+
+    expiration: UtcTime,
+    eq_conditions: HashMap<String, String>,
+    starts_with_conditions: HashMap<String, String>,
+    lower_limit: Option<usize>,
+    upper_limit: Option<usize>,
+}
+
+impl PostPolicy {
+    const EQ: &'static str = "eq";
+    const STARTS_WITH: &'static str = "starts-with";
+    const ALGORITHM: &'static str = "AWS4-HMAC-SHA256";
+
+    /// Returns post policy with given bucket name and expiration
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use minio::s3::utils::*;
+    /// use chrono::Duration;
+    /// use minio::s3::builders::PostPolicy;
+    /// let expiration = utc_now() + Duration::days(7);
+    /// let policy = PostPolicy::new("bucket-name", expiration).unwrap();
+    /// ```
+    pub fn new(bucket_name: &str, expiration: UtcTime) -> Result<PostPolicy, Error> {
+        check_bucket_name(bucket_name, true)?;
+
+        Ok(PostPolicy {
+            region: None,
+            bucket: bucket_name.to_owned(),
+            expiration,
+            eq_conditions: HashMap::new(),
+            starts_with_conditions: HashMap::new(),
+            lower_limit: None,
+            upper_limit: None,
+        })
+    }
+
+    fn trim_dollar(value: &str) -> String {
+        let mut s = value.to_string();
+        if s.starts_with('$') {
+            s.remove(0);
+        }
+        s
+    }
+
+    fn is_reserved_element(element: &str) -> bool {
+        element.eq_ignore_ascii_case("bucket")
+            || element.eq_ignore_ascii_case("x-amz-algorithm")
+            || element.eq_ignore_ascii_case("x-amz-credential")
+            || element.eq_ignore_ascii_case("x-amz-date")
+            || element.eq_ignore_ascii_case("policy")
+            || element.eq_ignore_ascii_case("x-amz-signature")
+    }
+
+    fn get_credential_string(access_key: &String, date: &UtcTime, region: &String) -> String {
+        format!(
+            "{}/{}/{}/s3/aws4_request",
+            access_key,
+            to_signer_date(*date),
+            region
+        )
+    }
+
+    /// Adds equals condition for given element and value
+    /// # Examples
+    ///
+    /// ```
+    /// use minio::s3::utils::*;
+    /// use chrono::Duration;
+    /// use minio::s3::builders::PostPolicy;
+    /// let expiration = utc_now() + Duration::days(7);
+    /// let mut policy = PostPolicy::new("my-bucket", expiration).unwrap();
+    ///
+    /// // Add condition that 'key' (object name) equals to 'bucket-name'
+    /// policy.add_equals_condition("key", "bucket-name").unwrap();
+    /// ```
+    pub fn add_equals_condition(&mut self, element: &str, value: &str) -> Result<(), Error> {
+        if element.is_empty() {
+            return Err(Error::PostPolicyError(
+                "condition element cannot be empty".to_string(),
+            ));
+        }
+
+        let v = PostPolicy::trim_dollar(element);
+        if v.eq_ignore_ascii_case("success_action_redirect")
+            || v.eq_ignore_ascii_case("redirect")
+            || v.eq_ignore_ascii_case("content-length-range")
+        {
+            return Err(Error::PostPolicyError(format!(
+                "{} is unsupported for equals condition",
+                element
+            )));
+        }
+
+        if PostPolicy::is_reserved_element(v.as_str()) {
+            return Err(Error::PostPolicyError(format!("{} cannot set", element)));
+        }
+
+        self.eq_conditions.insert(v, value.to_string());
+        Ok(())
+    }
+
+    /// Removes equals condition for given element
+    /// # Examples
+    ///
+    /// ```
+    /// use minio::s3::utils::*;
+    /// use chrono::Duration;
+    /// use minio::s3::builders::PostPolicy;
+    /// let expiration = utc_now() + Duration::days(7);
+    /// let mut policy = PostPolicy::new("bucket-name", expiration).unwrap();
+    /// policy.add_equals_condition("key", "bucket-name");
+    ///
+    /// policy.remove_equals_condition("key");
+    /// ```
+    pub fn remove_equals_condition(&mut self, element: &str) {
+        self.eq_conditions.remove(element);
+    }
+
+    /// Adds starts-with condition for given element and value
+    /// # Examples
+    ///
+    /// ```
+    /// use minio::s3::utils::*;
+    /// use chrono::Duration;
+    /// use minio::s3::builders::PostPolicy;
+    /// let expiration = utc_now() + Duration::days(7);
+    /// let mut policy = PostPolicy::new("bucket-name", expiration).unwrap();
+    ///
+    /// // Add condition that 'Content-Type' starts with 'image/'
+    /// policy.add_starts_with_condition("Content-Type", "image/").unwrap();
+    /// ```
+    pub fn add_starts_with_condition(&mut self, element: &str, value: &str) -> Result<(), Error> {
+        if element.is_empty() {
+            return Err(Error::PostPolicyError(
+                "condition element cannot be empty".to_string(),
+            ));
+        }
+
+        let v = PostPolicy::trim_dollar(element);
+        if v.eq_ignore_ascii_case("success_action_status")
+            || v.eq_ignore_ascii_case("content-length-range")
+            || (v.starts_with("x-amz-") && v.starts_with("x-amz-meta-"))
+        {
+            return Err(Error::PostPolicyError(format!(
+                "{} is unsupported for starts-with condition",
+                element
+            )));
+        }
+
+        if PostPolicy::is_reserved_element(v.as_str()) {
+            return Err(Error::PostPolicyError(format!("{} cannot set", element)));
+        }
+
+        self.starts_with_conditions.insert(v, value.to_string());
+        Ok(())
+    }
+
+    /// Removes starts-with condition for given element
+    /// # Examples
+    ///
+    /// ```
+    /// use minio::s3::utils::*;
+    /// use chrono::Duration;
+    /// use minio::s3::builders::PostPolicy;
+    /// let expiration = utc_now() + Duration::days(7);
+    /// let mut policy = PostPolicy::new("bucket-name", expiration).unwrap();
+    /// policy.add_starts_with_condition("Content-Type", "image/").unwrap();
+    ///
+    /// policy.remove_starts_with_condition("Content-Type");
+    /// ```
+    pub fn remove_starts_with_condition(&mut self, element: &str) {
+        self.starts_with_conditions.remove(element);
+    }
+
+    /// Adds content-length range condition with given lower and upper limits
+    /// # Examples
+    ///
+    /// ```
+    /// use minio::s3::utils::*;
+    /// use chrono::Duration;
+    /// use minio::s3::builders::PostPolicy;
+    ///
+    /// let expiration = utc_now() + Duration::days(7);
+    /// let mut policy = PostPolicy::new("my-bucket", expiration).unwrap();
+    ///
+    /// // Add condition that 'content-length-range' is between 64kiB to 10MiB
+    /// policy.add_content_length_range_condition(64 * 1024, 10 * 1024 * 1024).unwrap();
+    /// ```
+    pub fn add_content_length_range_condition(
+        &mut self,
+        lower_limit: usize,
+        upper_limit: usize,
+    ) -> Result<(), Error> {
+        if lower_limit > upper_limit {
+            return Err(Error::PostPolicyError(
+                "lower limit cannot be greater than upper limit".to_string(),
+            ));
+        }
+
+        self.lower_limit = Some(lower_limit);
+        self.upper_limit = Some(upper_limit);
+        Ok(())
+    }
+
+    /// Removes content-length range condition
+    pub fn remove_content_length_range_condition(&mut self) {
+        self.lower_limit = None;
+        self.upper_limit = None;
+    }
+
+    /// Generates form data for given access/secret keys, optional session token and region.
+    /// The returned map contains `x-amz-algorithm`, `x-amz-credential`, `x-amz-security-token`, `x-amz-date`, `policy` and `x-amz-signature` keys and values.
+    pub fn form_data(
+        &self,
+        access_key: String,
+        secret_key: String,
+        session_token: Option<String>,
+        region: String,
+    ) -> Result<HashMap<String, String>, Error> {
+        if region.is_empty() {
+            return Err(Error::PostPolicyError("region cannot be empty".to_string()));
+        }
+
+        if !self.eq_conditions.contains_key("key")
+            && !self.starts_with_conditions.contains_key("key")
+        {
+            return Err(Error::PostPolicyError(
+                "key condition must be set".to_string(),
+            ));
+        }
+
+        let mut conditions: Vec<Value> = Vec::new();
+        conditions.push(json!([PostPolicy::EQ, "$bucket", self.bucket]));
+        for (key, value) in &self.eq_conditions {
+            conditions.push(json!([PostPolicy::EQ, String::from("$") + key, value]));
+        }
+        for (key, value) in &self.starts_with_conditions {
+            conditions.push(json!([
+                PostPolicy::STARTS_WITH,
+                String::from("$") + key,
+                value
+            ]));
+        }
+        if self.lower_limit.is_some() && self.upper_limit.is_some() {
+            conditions.push(json!([
+                "content-length-range",
+                self.lower_limit.unwrap(),
+                self.upper_limit.unwrap()
+            ]));
+        }
+
+        let date = utc_now();
+        let credential = PostPolicy::get_credential_string(&access_key, &date, &region);
+        let amz_date = to_amz_date(date);
+        conditions.push(json!([
+            PostPolicy::EQ,
+            "$x-amz-algorithm",
+            PostPolicy::ALGORITHM
+        ]));
+        conditions.push(json!([PostPolicy::EQ, "$x-amz-credential", credential]));
+        if let Some(v) = &session_token {
+            conditions.push(json!([PostPolicy::EQ, "$x-amz-security-token", v]));
+        }
+        conditions.push(json!([PostPolicy::EQ, "$x-amz-date", amz_date]));
+
+        let policy = json!({
+            "expiration": to_iso8601utc(self.expiration),
+            "conditions": conditions,
+        });
+
+        let encoded_policy = b64encode(policy.to_string());
+        let signature = post_presign_v4(&encoded_policy, &secret_key, date, &region);
+
+        let mut data: HashMap<String, String> = HashMap::new();
+        data.insert("x-amz-algorithm".into(), PostPolicy::ALGORITHM.to_string());
+        data.insert("x-amz-credential".into(), credential);
+        data.insert("x-amz-date".into(), amz_date);
+        data.insert("policy".into(), encoded_policy);
+        data.insert("x-amz-signature".into(), signature);
+        if let Some(v) = session_token {
+            data.insert("x-amz-security-token".into(), v);
+        }
+
+        Ok(data)
+    }
+}

src/s3/builders/get_region.rs

@@ -0,0 +1,72 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::s3::Client;
+use crate::s3::client::DEFAULT_REGION;
+use crate::s3::error::Error;
+use crate::s3::multimap::Multimap;
+use crate::s3::response::GetRegionResponse;
+use crate::s3::types::{S3Api, S3Request, ToS3Request};
+use crate::s3::utils::{check_bucket_name, insert};
+use http::Method;
+
+/// Argument builder for [get_region()](Client::get_region) API
+#[derive(Clone, Debug, Default)]
+pub struct GetRegion {
+    client: Client,
+
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    bucket: String,
+}
+
+impl GetRegion {
+    pub fn new(client: Client, bucket: String) -> Self {
+        Self {
+            client,
+            bucket,
+            ..Default::default()
+        }
+    }
+
+    pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
+        self.extra_headers = extra_headers;
+        self
+    }
+
+    pub fn extra_query_params(mut self, extra_query_params: Option<Multimap>) -> Self {
+        self.extra_query_params = extra_query_params;
+        self
+    }
+}
+
+#[derive(Default, Debug)]
+pub struct GetRegionPhantomData;
+
+impl S3Api for GetRegion {
+    type S3Response = GetRegionResponse;
+}
+
+impl ToS3Request for GetRegion {
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        check_bucket_name(&self.bucket, true)?;
+
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(Some(DEFAULT_REGION.to_string()))
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "location"))
+            .headers(self.extra_headers.unwrap_or_default()))
+    }
+}

src/s3/builders/is_object_legal_hold_enabled.rs

@@ -15,38 +15,36 @@
 
 use crate::s3::Client;
 use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::IsObjectLegalHoldEnabledResponse;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, check_object_name, insert};
 use http::Method;
 
 /// Argument builder for [is_object_legal_hold_enabled()](Client::is_object_legal_hold_enabled) API
 #[derive(Clone, Debug, Default)]
 pub struct IsObjectLegalHoldEnabled {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) object: String,
-    pub(crate) version_id: Option<String>,
+    object: String,
+    version_id: Option<String>,
 }
 
 impl IsObjectLegalHoldEnabled {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
+            object,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -57,11 +55,6 @@ impl IsObjectLegalHoldEnabled {
         self
     }
 
-    pub fn object(mut self, object: String) -> Self {
-        self.object = object;
-        self
-    }
-
     pub fn version_id(mut self, version_id: Option<String>) -> Self {
         self.version_id = version_id;
         self
@@ -73,36 +66,18 @@ impl S3Api for IsObjectLegalHoldEnabled {
 }
 
 impl ToS3Request for IsObjectLegalHoldEnabled {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
+        check_object_name(&self.object)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
+        let mut query_params: Multimap = insert(self.extra_query_params, "legal-hold");
+        query_params.add_version(self.version_id);
 
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-        query_params.insert(String::from("legal-hold"), String::new());
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
             .query_params(query_params)
-            .headers(headers)
-            .object(Some(&self.object));
-
-        Ok(req)
+            .headers(self.extra_headers.unwrap_or_default())
+            .object(Some(self.object)))
     }
 }

src/s3/builders/list_buckets.rs

@@ -15,32 +15,29 @@
 
 use http::Method;
 
+use crate::s3::multimap::Multimap;
 use crate::s3::response::ListBucketsResponse;
 use crate::s3::{
     Client,
     error::Error,
     types::{S3Api, S3Request, ToS3Request},
-    utils::Multimap,
 };
 
 /// Argument builder for [list_buckets()](Client::list_buckets) API.
 #[derive(Clone, Debug, Default)]
 pub struct ListBuckets {
-    client: Option<Client>,
+    client: Client,
 
     extra_headers: Option<Multimap>,
     extra_query_params: Option<Multimap>,
 }
 
-// builder interface
 impl ListBuckets {
-    pub fn new() -> Self {
-        Default::default()
-    }
-
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
+    pub fn new(client: Client) -> Self {
+        Self {
+            client,
+            ..Default::default()
+        }
     }
 
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
@@ -54,27 +51,14 @@ impl ListBuckets {
     }
 }
 
-impl ToS3Request for ListBuckets {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            headers = v.clone();
-        }
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            query_params = v.clone();
-        }
-
-        let req = S3Request::new(
-            self.client.as_ref().ok_or(Error::NoClientProvided)?,
-            Method::GET,
-        )
-        .query_params(query_params)
-        .headers(headers);
-        Ok(req)
-    }
-}
-
 impl S3Api for ListBuckets {
     type S3Response = ListBucketsResponse;
 }
+
+impl ToS3Request for ListBuckets {
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        Ok(S3Request::new(self.client, Method::GET)
+            .query_params(self.extra_query_params.unwrap_or_default())
+            .headers(self.extra_headers.unwrap_or_default()))
+    }
+}

src/s3/builders/list_objects.rs

@@ -16,6 +16,8 @@ use async_trait::async_trait;
 use futures_util::{Stream, StreamExt, stream as futures_stream};
 use http::Method;
 
+use crate::s3::multimap::{Multimap, MultimapExt};
+use crate::s3::utils::insert;
 use crate::s3::{
     client::Client,
     error::Error,
@@ -24,34 +26,41 @@ use crate::s3::{
         ListObjectVersionsResponse, ListObjectsV1Response, ListObjectsV2Response,
     },
     types::{S3Api, S3Request, ToS3Request, ToStream},
-    utils::{Multimap, check_bucket_name, merge},
+    utils::check_bucket_name,
 };
 
 fn add_common_list_objects_query_params(
     query_params: &mut Multimap,
-    delimiter: Option<&str>,
+    delimiter: Option<String>,
     disable_url_encoding: bool,
     max_keys: Option<u16>,
-    prefix: Option<&str>,
+    prefix: Option<String>,
 ) {
-    query_params.insert(
-        String::from("delimiter"),
-        delimiter.unwrap_or("").to_string(),
-    );
-    query_params.insert(
-        String::from("max-keys"),
-        max_keys.unwrap_or(1000).to_string(),
-    );
-    query_params.insert(String::from("prefix"), prefix.unwrap_or("").to_string());
+    query_params.add("delimiter", delimiter.unwrap_or("".into()));
+    query_params.add("max-keys", max_keys.unwrap_or(1000).to_string());
+    query_params.add("prefix", prefix.unwrap_or("".into()));
     if !disable_url_encoding {
-        query_params.insert(String::from("encoding-type"), String::from("url"));
+        query_params.add("encoding-type", "url");
     }
 }
 
+/// Helper function delimiter based on recursive flag when delimiter is not provided.
+fn delim_helper(delim: Option<String>, recursive: bool) -> Option<String> {
+    if delim.is_some() {
+        return delim;
+    }
+    match recursive {
+        true => None,
+        false => Some(String::from("/")),
+    }
+}
+
+// region: list-objects-v1
+
 /// Argument for ListObjectsV1 S3 API.
 #[derive(Clone, Debug, Default)]
 struct ListObjectsV1 {
-    client: Option<Client>,
+    client: Client,
 
     extra_headers: Option<Multimap>,
     extra_query_params: Option<Multimap>,
@@ -70,76 +79,61 @@ impl ToStream for ListObjectsV1 {
 
     async fn to_stream(self) -> Box<dyn Stream<Item = Result<Self::Item, Error>> + Unpin + Send> {
         Box::new(Box::pin(futures_stream::unfold(
-            (self.clone(), false),
-            move |(mut args, mut is_done)| async move {
+            (self, false),
+            move |(args, mut is_done)| async move {
+                // Stop the stream if no more data is available
                 if is_done {
                     return None;
                 }
-                let resp = args.send().await;
-                match resp {
+                // Prepare a clone of `args` for the next iteration
+                let mut args_for_next_request: ListObjectsV1 = args.clone();
+
+                // Handle the result of the API call
+                match args.send().await {
                     Ok(resp) => {
-                        args.marker.clone_from(&resp.next_marker);
+                        // Update the marker for the next request
+                        args_for_next_request.marker.clone_from(&resp.next_marker);
+
+                        // Determine if there are more results to fetch
                         is_done = !resp.is_truncated;
-                        Some((Ok(resp), (args, is_done)))
+
+                        // Return the response and prepare for the next iteration
+                        Some((Ok(resp), (args_for_next_request, is_done)))
                     }
-                    Err(e) => Some((Err(e), (args, true))),
+                    Err(e) => Some((Err(e), (args_for_next_request, true))),
                 }
             },
         )))
     }
 }
 
-impl ToS3Request for ListObjectsV1 {
-    fn to_s3request(&self) -> Result<S3Request<'_>, Error> {
-        check_bucket_name(&self.bucket, true)?;
-
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
-        }
-
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-
-        add_common_list_objects_query_params(
-            &mut query_params,
-            self.delimiter.as_deref(),
-            self.disable_url_encoding,
-            self.max_keys,
-            self.prefix.as_deref(),
-        );
-        if let Some(v) = &self.marker {
-            query_params.insert(String::from("marker"), v.to_string());
-        }
-
-        let req = S3Request::new(
-            self.client.as_ref().ok_or(Error::NoClientProvided)?,
-            Method::GET,
-        )
-        .region(self.region.as_deref())
-        .bucket(Some(&self.bucket))
-        .query_params(query_params)
-        .headers(headers);
-
-        Ok(req)
-    }
-}
-
 impl S3Api for ListObjectsV1 {
     type S3Response = ListObjectsV1Response;
 }
 
-// Helper function delimiter based on recursive flag when delimiter is not
-// provided.
-fn delim_helper(delim: Option<String>, recursive: bool) -> Option<String> {
-    if delim.is_some() {
-        return delim;
-    }
-    match recursive {
-        true => None,
-        false => Some(String::from("/")),
+impl ToS3Request for ListObjectsV1 {
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        check_bucket_name(&self.bucket, true)?;
+
+        let mut query_params: Multimap = self.extra_query_params.unwrap_or_default();
+        {
+            add_common_list_objects_query_params(
+                &mut query_params,
+                self.delimiter,
+                self.disable_url_encoding,
+                self.max_keys,
+                self.prefix,
+            );
+            if let Some(v) = self.marker {
+                query_params.add("marker", v);
+            }
+        }
+
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(query_params)
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }
 
@@ -159,11 +153,14 @@ impl From<ListObjects> for ListObjectsV1 {
         }
     }
 }
+// endregion: list-objects-v1
+
+// region: list-objects-v2
 
 /// Argument for ListObjectsV2 S3 API.
 #[derive(Clone, Debug, Default)]
 struct ListObjectsV2 {
-    client: Option<Client>,
+    client: Client,
 
     extra_headers: Option<Multimap>,
     extra_query_params: Option<Multimap>,
@@ -177,6 +174,7 @@ struct ListObjectsV2 {
     continuation_token: Option<String>,
     fetch_owner: bool,
     include_user_metadata: bool,
+    unsorted: bool,
 }
 
 #[async_trait]
@@ -185,20 +183,28 @@ impl ToStream for ListObjectsV2 {
 
     async fn to_stream(self) -> Box<dyn Stream<Item = Result<Self::Item, Error>> + Unpin + Send> {
         Box::new(Box::pin(futures_stream::unfold(
-            (self.clone(), false),
-            move |(mut args, mut is_done)| async move {
+            (self, false),
+            move |(args, mut is_done)| async move {
+                // Stop the stream if no more data is available
                 if is_done {
                     return None;
                 }
-                let resp = args.send().await;
-                match resp {
+                // Prepare a clone of `args` for the next iteration
+                let mut args_for_next_request = args.clone();
+                match args.send().await {
                     Ok(resp) => {
-                        args.continuation_token
+                        // Update the continuation_token for the next request
+                        args_for_next_request
+                            .continuation_token
                             .clone_from(&resp.next_continuation_token);
+
+                        // Determine if there are more results to fetch
                         is_done = !resp.is_truncated;
-                        Some((Ok(resp), (args, is_done)))
+
+                        // Return the response and prepare for the next iteration
+                        Some((Ok(resp), (args_for_next_request, is_done)))
                     }
-                    Err(e) => Some((Err(e), (args, true))),
+                    Err(e) => Some((Err(e), (args_for_next_request, true))),
                 }
             },
         )))
@@ -210,48 +216,41 @@ impl S3Api for ListObjectsV2 {
 }
 
 impl ToS3Request for ListObjectsV2 {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
+        let mut query_params: Multimap = self.extra_query_params.unwrap_or_default();
+        {
+            query_params.add("list-type", "2");
+            add_common_list_objects_query_params(
+                &mut query_params,
+                self.delimiter,
+                self.disable_url_encoding,
+                self.max_keys,
+                self.prefix,
+            );
+            if let Some(v) = self.continuation_token {
+                query_params.add("continuation-token", v);
+            }
+            if self.fetch_owner {
+                query_params.add("fetch-owner", "true");
+            }
+            if let Some(v) = self.start_after {
+                query_params.add("start-after", v);
+            }
+            if self.include_user_metadata {
+                query_params.add("metadata", "true");
+            }
+            if self.unsorted {
+                query_params.add("unsorted", "true");
+            }
         }
 
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-        query_params.insert(String::from("list-type"), String::from("2"));
-        add_common_list_objects_query_params(
-            &mut query_params,
-            self.delimiter.as_deref(),
-            self.disable_url_encoding,
-            self.max_keys,
-            self.prefix.as_deref(),
-        );
-        if let Some(v) = &self.continuation_token {
-            query_params.insert(String::from("continuation-token"), v.to_string());
-        }
-        if self.fetch_owner {
-            query_params.insert(String::from("fetch-owner"), String::from("true"));
-        }
-        if let Some(v) = &self.start_after {
-            query_params.insert(String::from("start-after"), v.to_string());
-        }
-        if self.include_user_metadata {
-            query_params.insert(String::from("metadata"), String::from("true"));
-        }
-
-        let req = S3Request::new(
-            self.client.as_ref().ok_or(Error::NoClientProvided)?,
-            Method::GET,
-        )
-        .region(self.region.as_deref())
-        .bucket(Some(&self.bucket))
-        .query_params(query_params)
-        .headers(headers);
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(query_params)
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }
 
@@ -271,14 +270,18 @@ impl From<ListObjects> for ListObjectsV2 {
             continuation_token: value.continuation_token,
             fetch_owner: value.fetch_owner,
             include_user_metadata: value.include_user_metadata,
+            unsorted: value.unsorted,
         }
     }
 }
+// endregion: list-objects-v2
 
-/// Argument for ListObjectVerions S3 API
+// region: list-object-versions
+
+/// Argument for ListObjectVersions S3 API
 #[derive(Clone, Debug, Default)]
 struct ListObjectVersions {
-    client: Option<Client>,
+    client: Client,
 
     extra_headers: Option<Multimap>,
     extra_query_params: Option<Multimap>,
@@ -291,6 +294,7 @@ struct ListObjectVersions {
     key_marker: Option<String>,
     version_id_marker: Option<String>,
     include_user_metadata: bool,
+    unsorted: bool,
 }
 
 #[async_trait]
@@ -299,22 +303,32 @@ impl ToStream for ListObjectVersions {
 
     async fn to_stream(self) -> Box<dyn Stream<Item = Result<Self::Item, Error>> + Unpin + Send> {
         Box::new(Box::pin(futures_stream::unfold(
-            (self.clone(), false),
-            move |(mut args, mut is_done)| async move {
+            (self, false),
+            move |(args, mut is_done)| async move {
+                // Stop the stream if no more data is available
                 if is_done {
                     return None;
                 }
-                let resp = args.send().await;
-                match resp {
+                // Prepare a clone of `args` for the next iteration
+                let mut args_for_next_request = args.clone();
+                match args.send().await {
                     Ok(resp) => {
-                        args.key_marker.clone_from(&resp.next_key_marker);
-                        args.version_id_marker
+                        // Update the key_marker for the next request
+                        args_for_next_request
+                            .key_marker
+                            .clone_from(&resp.next_key_marker);
+                        // Update the version_id_marker for the next request
+                        args_for_next_request
+                            .version_id_marker
                             .clone_from(&resp.next_version_id_marker);
 
+                        // Determine if there are more results to fetch
                         is_done = !resp.is_truncated;
-                        Some((Ok(resp), (args, is_done)))
+
+                        // Return the response and prepare for the next iteration
+                        Some((Ok(resp), (args_for_next_request, is_done)))
                     }
-                    Err(e) => Some((Err(e), (args, true))),
+                    Err(e) => Some((Err(e), (args_for_next_request, true))),
                 }
             },
         )))
@@ -326,51 +340,43 @@ impl S3Api for ListObjectVersions {
 }
 
 impl ToS3Request for ListObjectVersions {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
+        let mut query_params: Multimap = insert(self.extra_query_params, "versions");
+        {
+            add_common_list_objects_query_params(
+                &mut query_params,
+                self.delimiter,
+                self.disable_url_encoding,
+                self.max_keys,
+                self.prefix,
+            );
+            if let Some(v) = self.key_marker {
+                query_params.add("key-marker", v);
+            }
+            if let Some(v) = self.version_id_marker {
+                query_params.add("version-id-marker", v);
+            }
+            if self.include_user_metadata {
+                query_params.add("metadata", "true");
+            }
+            if self.unsorted {
+                query_params.add("unsorted", "true");
+            }
         }
 
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-        query_params.insert(String::from("versions"), String::new());
-        add_common_list_objects_query_params(
-            &mut query_params,
-            self.delimiter.as_deref(),
-            self.disable_url_encoding,
-            self.max_keys,
-            self.prefix.as_deref(),
-        );
-        if let Some(v) = &self.key_marker {
-            query_params.insert(String::from("key-marker"), v.to_string());
-        }
-        if let Some(v) = &self.version_id_marker {
-            query_params.insert(String::from("version-id-marker"), v.to_string());
-        }
-        if self.include_user_metadata {
-            query_params.insert(String::from("metadata"), String::from("true"));
-        }
-
-        let req = S3Request::new(
-            self.client.as_ref().ok_or(Error::NoClientProvided)?,
-            Method::GET,
-        )
-        .region(self.region.as_deref())
-        .bucket(Some(&self.bucket))
-        .query_params(query_params)
-        .headers(headers);
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(query_params)
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }
 
 impl From<ListObjects> for ListObjectVersions {
     fn from(value: ListObjects) -> Self {
-        ListObjectVersions {
+        Self {
             client: value.client,
             extra_headers: value.extra_headers,
             extra_query_params: value.extra_query_params,
@@ -383,10 +389,15 @@ impl From<ListObjects> for ListObjectVersions {
             key_marker: value.key_marker,
             version_id_marker: value.version_id_marker,
             include_user_metadata: value.include_user_metadata,
+            unsorted: value.unsorted,
         }
     }
 }
 
+// endregion: list-object-versions
+
+// region: list-objects
+
 /// Argument builder for
 /// [list_objects()](crate::s3::client::Client::list_objects) API.
 ///
@@ -395,7 +406,7 @@ impl From<ListObjects> for ListObjectVersions {
 /// a stream of results. Pagination is automatically performed.
 #[derive(Clone, Debug, Default)]
 pub struct ListObjects {
-    client: Option<Client>,
+    client: Client,
 
     // Parameters common to all ListObjects APIs.
     extra_headers: Option<Multimap>,
@@ -424,6 +435,7 @@ pub struct ListObjects {
     recursive: bool,
     use_api_v1: bool,
     include_versions: bool,
+    unsorted: bool,
 }
 
 #[async_trait]
@@ -445,18 +457,13 @@ impl ToStream for ListObjects {
 }
 
 impl ListObjects {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
-
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -556,4 +563,11 @@ impl ListObjects {
         self.include_versions = include_versions;
         self
     }
+
+    /// Set this to allow unsorted versions. Defaults to false
+    pub fn unsorted(mut self, unsorted: bool) -> Self {
+        self.unsorted = unsorted;
+        self
+    }
 }
+// endregion: list-objects

src/s3/builders/listen_bucket_notification.rs

@@ -17,12 +17,13 @@ use async_trait::async_trait;
 use futures_util::Stream;
 use http::Method;
 
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::{
     client::Client,
     error::Error,
     response::ListenBucketNotificationResponse,
     types::{NotificationRecords, S3Api, S3Request, ToS3Request},
-    utils::{Multimap, check_bucket_name, merge},
+    utils::check_bucket_name,
 };
 
 /// Argument builder for
@@ -30,7 +31,7 @@ use crate::s3::{
 /// API.
 #[derive(Clone, Debug, Default)]
 pub struct ListenBucketNotification {
-    client: Option<Client>,
+    client: Client,
 
     extra_headers: Option<Multimap>,
     extra_query_params: Option<Multimap>,
@@ -41,72 +42,15 @@ pub struct ListenBucketNotification {
     events: Option<Vec<String>>,
 }
 
-#[async_trait]
-impl S3Api for ListenBucketNotification {
-    type S3Response = (
-        ListenBucketNotificationResponse,
-        Box<dyn Stream<Item = Result<NotificationRecords, Error>> + Unpin + Send>,
-    );
-}
-
-impl ToS3Request for ListenBucketNotification {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
-        let client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-        if client.is_aws_host() {
-            return Err(Error::UnsupportedApi(String::from(
-                "ListenBucketNotification",
-            )));
-        }
-
-        check_bucket_name(&self.bucket, true)?;
-
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
-        }
-
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-        if let Some(v) = &self.prefix {
-            query_params.insert(String::from("prefix"), v.to_string());
-        }
-        if let Some(v) = &self.suffix {
-            query_params.insert(String::from("suffix"), v.to_string());
-        }
-        if let Some(v) = &self.events {
-            for e in v.iter() {
-                query_params.insert(String::from("events"), e.to_string());
-            }
-        } else {
-            query_params.insert(String::from("events"), String::from("s3:ObjectCreated:*"));
-            query_params.insert(String::from("events"), String::from("s3:ObjectRemoved:*"));
-            query_params.insert(String::from("events"), String::from("s3:ObjectAccessed:*"));
-        }
-
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-        Ok(req)
-    }
-}
-
 impl ListenBucketNotification {
-    pub fn new(bucket_name: &str) -> ListenBucketNotification {
-        ListenBucketNotification {
-            bucket: bucket_name.to_owned(),
+    pub fn new(client: Client, bucket: String) -> Self {
+        Self {
+            client,
+            bucket,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -137,3 +81,47 @@ impl ListenBucketNotification {
         self
     }
 }
+
+#[async_trait]
+impl S3Api for ListenBucketNotification {
+    type S3Response = (
+        ListenBucketNotificationResponse,
+        Box<dyn Stream<Item = Result<NotificationRecords, Error>> + Unpin + Send>,
+    );
+}
+
+impl ToS3Request for ListenBucketNotification {
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        {
+            check_bucket_name(&self.bucket, true)?;
+            if self.client.is_aws_host() {
+                return Err(Error::UnsupportedApi("ListenBucketNotification".into()));
+            }
+        }
+
+        let mut query_params: Multimap = self.extra_query_params.unwrap_or_default();
+        {
+            if let Some(v) = self.prefix {
+                query_params.add("prefix", v);
+            }
+            if let Some(v) = self.suffix {
+                query_params.add("suffix", v);
+            }
+            if let Some(v) = self.events {
+                for e in v.into_iter() {
+                    query_params.add("events", e);
+                }
+            } else {
+                query_params.add("events", "s3:ObjectCreated:*");
+                query_params.add("events", "s3:ObjectRemoved:*");
+                query_params.add("events", "s3:ObjectAccessed:*");
+            }
+        }
+
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(query_params)
+            .headers(self.extra_headers.unwrap_or_default()))
+    }
+}

src/s3/builders/make_bucket.rs

@@ -14,41 +14,37 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::client::DEFAULT_REGION;
 use crate::s3::error::Error;
-use crate::s3::http::BaseUrl;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::MakeBucketResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::check_bucket_name;
 use http::Method;
 
 /// Argument builder for [make_bucket()](Client::make_bucket) API
 #[derive(Clone, Debug, Default)]
 pub struct MakeBucket {
-    pub client: Option<Client>,
+    client: Client,
 
-    pub extra_headers: Option<Multimap>,
-    pub extra_query_params: Option<Multimap>,
-    pub region: Option<String>,
-    pub bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub object_lock: bool,
+    object_lock: bool,
 }
 
 impl MakeBucket {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -70,64 +66,37 @@ impl MakeBucket {
     }
 }
 
-#[derive(Default, Debug)]
-pub struct MakeBucketPhantomData;
-
 impl S3Api for MakeBucket {
     type S3Response = MakeBucketResponse;
 }
 
 impl ToS3Request for MakeBucket {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let base_url: &BaseUrl = match &self.client {
-            None => return Err(Error::NoClientProvided),
-            Some(c) => &c.base_url,
-        };
-
         let region1: Option<&str> = self.region.as_deref();
-        let region2: Option<&str> = if base_url.region.is_empty() {
-            None
-        } else {
-            Some(base_url.region.as_str())
-        };
+        let region2: Option<&str> = self.client.get_region_from_url();
 
-        let region: &str = match (region1, region2) {
-            (None, None) => DEFAULT_REGION,
-            (Some(r), None) | (None, Some(r)) => r, // Take the non-None value
-            (Some(r1), Some(r2)) if r1 == r2 => r1, // Both are Some and equal
+        let region_str: String = match (region1, region2) {
+            (None, None) => DEFAULT_REGION.to_string(),
+            (Some(_), None) => self.region.unwrap(),
+            (None, Some(v)) => v.to_string(),
+            (Some(r1), Some(r2)) if r1 == r2 => self.region.unwrap(), // Both are Some and equal
             (Some(r1), Some(r2)) => {
                 return Err(Error::RegionMismatch(r1.to_string(), r2.to_string()));
             }
         };
 
-        let mut headers: Multimap = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
         if self.object_lock {
-            headers.insert(
-                String::from("x-amz-bucket-object-lock-enabled"),
-                String::from("true"),
-            );
+            headers.add("x-amz-bucket-object-lock-enabled", "true");
         }
 
-        let query_params: Multimap = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        let data: String = match region {
+        let data: String = match region_str.as_str() {
             DEFAULT_REGION => String::new(),
             _ => format!(
                 "<CreateBucketConfiguration><LocationConstraint>{}</LocationConstraint></CreateBucketConfiguration>",
-                region
+                region_str
             ),
         };
 
@@ -136,15 +105,11 @@ impl ToS3Request for MakeBucket {
             false => Some(SegmentedBytes::from(data)),
         };
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(Some(region))
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(Some(region_str))
+            .bucket(Some(self.bucket))
+            .query_params(self.extra_query_params.unwrap_or_default())
             .headers(headers)
-            .body(body);
-
-        Ok(req)
+            .body(body))
     }
 }

src/s3/builders/object_prompt.rs

@@ -13,9 +13,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::builders::SegmentedBytes;
-use crate::s3::sse::{Sse, SseCustomerKey};
-use crate::s3::utils::{Multimap, check_bucket_name, merge};
+use crate::s3::multimap::{Multimap, MultimapExt};
+use crate::s3::segmented_bytes::SegmentedBytes;
+use crate::s3::sse::SseCustomerKey;
+use crate::s3::utils::{check_bucket_name, check_object_name};
 use crate::s3::{
     client::Client,
     error::Error,
@@ -28,7 +29,7 @@ use serde_json::json;
 
 #[derive(Debug, Clone, Default)]
 pub struct ObjectPrompt {
-    client: Option<Client>,
+    client: Client,
     bucket: String,
     object: String,
     prompt: String,
@@ -43,21 +44,16 @@ pub struct ObjectPrompt {
 
 // builder interface
 impl ObjectPrompt {
-    pub fn new(bucket: &str, object: &str, prompt: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String, prompt: String) -> Self {
         ObjectPrompt {
-            client: None,
-            bucket: bucket.to_string(),
-            object: object.to_string(),
-            prompt: prompt.to_string(),
+            client,
+            bucket,
+            object,
+            prompt,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn lambda_arn(mut self, lambda_arn: &str) -> Self {
         self.lambda_arn = Some(lambda_arn.to_string());
         self
@@ -89,47 +85,28 @@ impl ObjectPrompt {
     }
 }
 
-// internal helpers
-impl ObjectPrompt {
-    fn get_headers(&self) -> Multimap {
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.ssec {
-            merge(&mut headers, &v.headers());
-        }
-        headers
-    }
+impl S3Api for ObjectPrompt {
+    type S3Response = ObjectPromptResponse;
 }
 
 impl ToS3Request for ObjectPrompt {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
-        check_bucket_name(&self.bucket, true)?;
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        {
+            check_bucket_name(&self.bucket, true)?;
+            check_object_name(&self.object)?;
 
-        if self.object.is_empty() {
-            return Err(Error::InvalidObjectName(String::from(
-                "object name cannot be empty",
-            )));
+            if self.client.is_aws_host() {
+                return Err(Error::UnsupportedApi("ObjectPrompt".into()));
+            }
+            if self.ssec.is_some() && !self.client.is_secure() {
+                return Err(Error::SseTlsRequired(None));
+            }
         }
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
+        let mut query_params: Multimap = self.extra_query_params.unwrap_or_default();
+        query_params.add_version(self.version_id);
 
-        if self.ssec.is_some() && !client.is_secure() {
-            return Err(Error::SseTlsRequired(None));
-        }
-
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
-        }
-        merge(&mut headers, &self.get_headers());
-
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-        query_params.insert(
-            String::from("lambdaArn"),
+        query_params.add(
+            "lambdaArn",
             self.lambda_arn
                 .as_ref()
                 .map(ToString::to_string)
@@ -139,18 +116,12 @@ impl ToS3Request for ObjectPrompt {
         let prompt_body = json!({ "prompt": self.prompt });
         let body: SegmentedBytes = SegmentedBytes::from(Bytes::from(prompt_body.to_string()));
 
-        let req = S3Request::new(client, Method::POST)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .object(Some(&self.object))
+        Ok(S3Request::new(self.client, Method::POST)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .object(Some(self.object))
             .query_params(query_params)
-            .headers(headers)
-            .body(Some(body));
-
-        Ok(req)
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(Some(body)))
     }
 }
-
-impl S3Api for ObjectPrompt {
-    type S3Response = ObjectPromptResponse;
-}

src/s3/builders/remove_bucket.rs

@@ -13,7 +13,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::s3::Client;
 use crate::s3::builders::BucketCommon;
 use crate::s3::error::Error;
 use crate::s3::response::RemoveBucketResponse;
@@ -32,30 +31,13 @@ impl S3Api for RemoveBucket {
 }
 
 impl ToS3Request for RemoveBucket {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::DELETE)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::DELETE)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(self.extra_query_params.unwrap_or_default())
+            .headers(self.extra_headers.unwrap_or_default()))
     }
 }

src/s3/builders/remove_objects.rs

@@ -15,26 +15,30 @@
 
 //! Builders for RemoveObject APIs.
 
-use std::pin::Pin;
-
 use async_trait::async_trait;
 use bytes::Bytes;
 use futures_util::{Stream, StreamExt, stream as futures_stream};
 use http::Method;
+use std::pin::Pin;
+
 use tokio_stream::iter as stream_iter;
 
+use crate::s3::multimap::{Multimap, MultimapExt};
+use crate::s3::response::DeleteError;
+use crate::s3::types::ListEntry;
+use crate::s3::utils::{check_object_name, insert};
 use crate::s3::{
     Client,
-    client_core::ClientCore,
     error::Error,
     response::{RemoveObjectResponse, RemoveObjectsResponse},
     types::{S3Api, S3Request, ToS3Request, ToStream},
-    utils::{Multimap, check_bucket_name, md5sum_hash, merge},
+    utils::{check_bucket_name, md5sum_hash},
 };
 
+// region: object-to-delete
 /// Specify an object to be deleted. The object can be specified by key or by
 /// key and version_id via the From trait.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct ObjectToDelete {
     key: String,
     version_id: Option<String>,
@@ -43,8 +47,8 @@ pub struct ObjectToDelete {
 /// A key can be converted into a DeleteObject. The version_id is set to None.
 impl From<&str> for ObjectToDelete {
     fn from(key: &str) -> Self {
-        ObjectToDelete {
-            key: key.to_string(),
+        Self {
+            key: key.to_owned(),
             version_id: None,
         }
     }
@@ -53,7 +57,7 @@ impl From<&str> for ObjectToDelete {
 /// A tuple of key and version_id can be converted into a DeleteObject.
 impl From<(&str, &str)> for ObjectToDelete {
     fn from((key, version_id): (&str, &str)) -> Self {
-        ObjectToDelete {
+        Self {
             key: key.to_string(),
             version_id: Some(version_id.to_string()),
         }
@@ -63,48 +67,58 @@ impl From<(&str, &str)> for ObjectToDelete {
 /// A tuple of key and option version_id can be converted into a DeleteObject.
 impl From<(&str, Option<&str>)> for ObjectToDelete {
     fn from((key, version_id): (&str, Option<&str>)) -> Self {
-        ObjectToDelete {
+        Self {
             key: key.to_string(),
             version_id: version_id.map(|v| v.to_string()),
         }
     }
 }
 
-#[derive(Debug, Clone)]
+impl From<ListEntry> for ObjectToDelete {
+    fn from(entry: ListEntry) -> Self {
+        Self {
+            key: entry.name,
+            version_id: entry.version_id,
+        }
+    }
+}
+
+impl From<DeleteError> for ObjectToDelete {
+    fn from(entry: DeleteError) -> Self {
+        Self {
+            key: entry.object_name,
+            version_id: entry.version_id,
+        }
+    }
+}
+
+// endregion: object-to-delete
+
+// region: remove-object
+
+#[derive(Debug, Clone, Default)]
 pub struct RemoveObject {
-    client: Option<Client>,
-
-    bucket: String,
-    object: ObjectToDelete,
-
-    bypass_governance_mode: bool,
+    client: Client,
 
     extra_headers: Option<Multimap>,
     extra_query_params: Option<Multimap>,
     region: Option<String>,
+    bucket: String,
+
+    object: ObjectToDelete,
+    bypass_governance_mode: bool,
 }
 
 impl RemoveObject {
-    pub fn new(bucket: &str, object: impl Into<ObjectToDelete>) -> Self {
+    pub fn new(client: Client, bucket: String, object: impl Into<ObjectToDelete>) -> Self {
         Self {
-            client: None,
-
-            bucket: bucket.to_string(),
+            client,
+            bucket,
             object: object.into(),
-
-            bypass_governance_mode: false,
-
-            extra_headers: None,
-            extra_query_params: None,
-            region: None,
+            ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn bypass_governance_mode(mut self, bypass_governance_mode: bool) -> Self {
         self.bypass_governance_mode = bypass_governance_mode;
         self
@@ -126,43 +140,33 @@ impl RemoveObject {
     }
 }
 
-impl ToS3Request for RemoveObject {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
-        check_bucket_name(&self.bucket, true)?;
-
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
-        }
-
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-        if let Some(v) = &self.object.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-
-        let req = S3Request::new(
-            self.client.as_ref().ok_or(Error::NoClientProvided)?,
-            Method::DELETE,
-        )
-        .region(self.region.as_deref())
-        .bucket(Some(&self.bucket))
-        .object(Some(&self.object.key))
-        .query_params(query_params)
-        .headers(headers);
-        Ok(req)
-    }
-}
-
 impl S3Api for RemoveObject {
     type S3Response = RemoveObjectResponse;
 }
 
-#[derive(Debug, Clone)]
+impl ToS3Request for RemoveObject {
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        check_bucket_name(&self.bucket, true)?;
+        check_object_name(&self.object.key)?;
+
+        let mut query_params: Multimap = self.extra_query_params.unwrap_or_default();
+        query_params.add_version(self.object.version_id);
+
+        Ok(S3Request::new(self.client, Method::DELETE)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .object(Some(self.object.key))
+            .query_params(query_params)
+            .headers(self.extra_headers.unwrap_or_default()))
+    }
+}
+
+// endregion: remove-object
+
+// region: remove-object-api
+#[derive(Debug, Clone, Default)]
 pub struct RemoveObjectsApi {
-    client: Option<ClientCore>,
+    client: Client,
 
     bucket: String,
     objects: Vec<ObjectToDelete>,
@@ -176,27 +180,16 @@ pub struct RemoveObjectsApi {
 }
 
 impl RemoveObjectsApi {
-    pub fn new(bucket: &str, objects: Vec<ObjectToDelete>) -> Self {
+    #[inline]
+    pub fn new(client: Client, bucket: String, objects: Vec<ObjectToDelete>) -> Self {
         RemoveObjectsApi {
-            client: None,
-
-            bucket: bucket.to_string(),
+            client,
+            bucket,
             objects,
-
-            bypass_governance_mode: false,
-            verbose_mode: false,
-
-            extra_headers: None,
-            extra_query_params: None,
-            region: None,
+            ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &ClientCore) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn bypass_governance_mode(mut self, bypass_governance_mode: bool) -> Self {
         self.bypass_governance_mode = bypass_governance_mode;
         self
@@ -226,8 +219,12 @@ impl RemoveObjectsApi {
     }
 }
 
+impl S3Api for RemoveObjectsApi {
+    type S3Response = RemoveObjectsResponse;
+}
+
 impl ToS3Request for RemoveObjectsApi {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
         let mut data = String::from("<Delete>");
@@ -249,56 +246,40 @@ impl ToS3Request for RemoveObjectsApi {
         data.push_str("</Delete>");
         let data: Bytes = data.into();
 
-        let mut headers = Multimap::new();
-        if let Some(v) = &self.extra_headers {
-            merge(&mut headers, v);
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
+        {
+            if self.bypass_governance_mode {
+                headers.add("x-amz-bypass-governance-retention", "true");
+            }
+            headers.add("Content-Type", "application/xml");
+            headers.add("Content-MD5", md5sum_hash(data.as_ref()));
         }
-        if self.bypass_governance_mode {
-            headers.insert(
-                String::from("x-amz-bypass-governance-retention"),
-                String::from("true"),
-            );
-        }
-        headers.insert(
-            String::from("Content-Type"),
-            String::from("application/xml"),
-        );
-        headers.insert(String::from("Content-MD5"), md5sum_hash(data.as_ref()));
 
-        let mut query_params = Multimap::new();
-        if let Some(v) = &self.extra_query_params {
-            merge(&mut query_params, v);
-        }
-        query_params.insert(String::from("delete"), String::new());
-
-        let client = self.client.as_ref().ok_or(Error::NoClientProvided)?.inner();
-        let req = S3Request::new(client, Method::POST)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
+        Ok(S3Request::new(self.client, Method::POST)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "delete"))
             .headers(headers)
-            .body(Some(data.into()));
-        Ok(req)
+            .body(Some(data.into())))
     }
 }
 
-impl S3Api for RemoveObjectsApi {
-    type S3Response = RemoveObjectsResponse;
-}
+// endregion: remove-object-api
 
+// region: delete-object
 pub struct DeleteObjects {
     items: Pin<Box<dyn Stream<Item = ObjectToDelete> + Send + Sync>>,
 }
 
 impl DeleteObjects {
     pub fn from_stream(s: impl Stream<Item = ObjectToDelete> + Send + Sync + 'static) -> Self {
-        DeleteObjects { items: Box::pin(s) }
+        Self { items: Box::pin(s) }
     }
 }
 
 impl From<ObjectToDelete> for DeleteObjects {
     fn from(delete_object: ObjectToDelete) -> Self {
-        DeleteObjects::from_stream(stream_iter(std::iter::once(delete_object)))
+        Self::from_stream(stream_iter(std::iter::once(delete_object)))
     }
 }
 
@@ -307,12 +288,16 @@ where
     I: Iterator<Item = ObjectToDelete> + Send + Sync + 'static,
 {
     fn from(keys: I) -> Self {
-        DeleteObjects::from_stream(stream_iter(keys))
+        Self::from_stream(stream_iter(keys))
     }
 }
 
+// endregion: delete-object
+
+// region: remove-objects
+
 pub struct RemoveObjects {
-    client: Option<Client>,
+    client: Client,
 
     bucket: String,
     objects: DeleteObjects,
@@ -326,11 +311,10 @@ pub struct RemoveObjects {
 }
 
 impl RemoveObjects {
-    pub fn new(bucket: &str, objects: impl Into<DeleteObjects>) -> Self {
-        RemoveObjects {
-            client: None,
-
-            bucket: bucket.to_string(),
+    pub fn new(client: Client, bucket: String, objects: impl Into<DeleteObjects>) -> Self {
+        Self {
+            client,
+            bucket,
             objects: objects.into(),
 
             bypass_governance_mode: false,
@@ -342,11 +326,6 @@ impl RemoveObjects {
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn bypass_governance_mode(mut self, bypass_governance_mode: bool) -> Self {
         self.bypass_governance_mode = bypass_governance_mode;
         self
@@ -386,15 +365,15 @@ impl RemoveObjects {
         if objects.is_empty() {
             return Ok(None);
         }
-        let client_core = ClientCore::new(self.client.as_ref().ok_or(Error::NoClientProvided)?);
-        let request = RemoveObjectsApi::new(&self.bucket, objects)
-            .client(&client_core)
-            .bypass_governance_mode(self.bypass_governance_mode)
-            .verbose_mode(self.verbose_mode)
-            .extra_headers(self.extra_headers.clone())
-            .extra_query_params(self.extra_query_params.clone())
-            .region(self.region.clone());
-        Ok(Some(request))
+
+        Ok(Some(
+            RemoveObjectsApi::new(self.client.clone(), self.bucket.clone(), objects)
+                .bypass_governance_mode(self.bypass_governance_mode)
+                .verbose_mode(self.verbose_mode)
+                .extra_headers(self.extra_headers.clone())
+                .extra_query_params(self.extra_query_params.clone())
+                .region(self.region.clone()),
+        ))
     }
 }
 
@@ -420,3 +399,5 @@ impl ToStream for RemoveObjects {
         )))
     }
 }
+
+// endregion: remove-objects

src/s3/builders/select_object_content.rs

@@ -0,0 +1,120 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::s3::Client;
+use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
+use crate::s3::response::SelectObjectContentResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
+use crate::s3::sse::SseCustomerKey;
+use crate::s3::types::{S3Api, S3Request, SelectRequest, ToS3Request};
+use crate::s3::utils::{check_bucket_name, check_object_name, insert, md5sum_hash};
+use async_trait::async_trait;
+use bytes::Bytes;
+use http::Method;
+
+/// Argument builder for [bucket_exists()](Client::bucket_exists) API
+#[derive(Default)]
+pub struct SelectObjectContent {
+    client: Client,
+
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
+
+    object: String,
+    version_id: Option<String>,
+    ssec: Option<SseCustomerKey>,
+    request: SelectRequest,
+}
+
+impl SelectObjectContent {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
+        Self {
+            client,
+            bucket,
+            object,
+            ..Default::default()
+        }
+    }
+
+    pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
+        self.extra_headers = extra_headers;
+        self
+    }
+
+    pub fn extra_query_params(mut self, extra_query_params: Option<Multimap>) -> Self {
+        self.extra_query_params = extra_query_params;
+        self
+    }
+
+    pub fn region(mut self, region: Option<String>) -> Self {
+        self.region = region;
+        self
+    }
+
+    pub fn version_id(mut self, version_id: Option<String>) -> Self {
+        self.version_id = version_id;
+        self
+    }
+
+    pub fn ssec(mut self, ssec: Option<SseCustomerKey>) -> Self {
+        self.ssec = ssec;
+        self
+    }
+
+    pub fn request(mut self, request: SelectRequest) -> Self {
+        self.request = request;
+        self
+    }
+}
+
+impl S3Api for SelectObjectContent {
+    type S3Response = SelectObjectContentResponse;
+}
+
+#[async_trait]
+impl ToS3Request for SelectObjectContent {
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        {
+            check_bucket_name(&self.bucket, true)?;
+            check_object_name(&self.object)?;
+
+            if self.ssec.is_some() && !self.client.is_secure() {
+                return Err(Error::SseTlsRequired(None));
+            }
+        }
+        let region: String = self.client.get_region_cached(&self.bucket, &self.region)?;
+        let data = self.request.to_xml();
+        let bytes: Bytes = data.into();
+
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
+        headers.add("Content-MD5", md5sum_hash(bytes.as_ref()));
+
+        let mut query_params: Multimap = insert(self.extra_query_params, "select");
+        query_params.add("select-type", "2");
+
+        let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(bytes));
+
+        Ok(S3Request::new(self.client, Method::POST)
+            .region(Some(region))
+            .bucket(Some(self.bucket))
+            .query_params(query_params)
+            .object(Some(self.object))
+            .headers(headers)
+            .body(body))
+    }
+}

src/s3/builders/set_bucket_encryption.rs

@@ -14,18 +14,19 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::Multimap;
 use crate::s3::response::SetBucketEncryptionResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{S3Api, S3Request, SseConfig, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, insert};
 use bytes::Bytes;
 use http::Method;
 
 /// Argument builder for [set_bucket_encryption()](Client::set_bucket_encryption) API
 #[derive(Clone, Debug, Default)]
 pub struct SetBucketEncryption {
-    client: Option<Client>,
+    client: Client,
 
     extra_headers: Option<Multimap>,
     extra_query_params: Option<Multimap>,
@@ -36,18 +37,14 @@ pub struct SetBucketEncryption {
 }
 
 impl SetBucketEncryption {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -74,35 +71,17 @@ impl S3Api for SetBucketEncryption {
 }
 
 impl ToS3Request for SetBucketEncryption {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert("encryption".into(), String::new());
-
         let bytes: Bytes = self.config.to_xml().into();
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(bytes));
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
 
-        let req = S3Request::new(client, Method::GET)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "encryption"))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/set_bucket_lifecycle.rs

@@ -14,38 +14,36 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::SetBucketLifecycleResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{LifecycleConfig, S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name, md5sum_hash};
+use crate::s3::utils::{check_bucket_name, insert, md5sum_hash};
 use bytes::Bytes;
 use http::Method;
 
 /// Argument builder for [set_bucket_lifecycle()](crate::s3::client::Client::set_bucket_lifecycle) API
 #[derive(Clone, Debug, Default)]
 pub struct SetBucketLifecycle {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) config: LifecycleConfig,
+    config: LifecycleConfig,
 }
 
 impl SetBucketLifecycle {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
 
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
@@ -73,37 +71,20 @@ impl S3Api for SetBucketLifecycle {
 }
 
 impl ToS3Request for SetBucketLifecycle {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let mut headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert("lifecycle".into(), String::new());
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
 
         let bytes: Bytes = self.config.to_xml().into();
-        headers.insert(String::from("Content-MD5"), md5sum_hash(&bytes));
+        headers.add("Content-MD5", md5sum_hash(&bytes));
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(bytes));
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "lifecycle"))
             .headers(headers)
-            .body(body);
-
-        Ok(req)
+            .body(body))
     }
 }

src/s3/builders/set_bucket_notification.rs

@@ -14,38 +14,36 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::Multimap;
 use crate::s3::response::SetBucketNotificationResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{NotificationConfig, S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, insert};
 use bytes::Bytes;
 use http::Method;
 
 /// Argument builder for [set_bucket_notification()](crate::s3::client::Client::set_bucket_notification) API
 #[derive(Clone, Debug, Default)]
 pub struct SetBucketNotification {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) config: NotificationConfig,
+    config: NotificationConfig,
 }
 
 impl SetBucketNotification {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
 
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
@@ -73,36 +71,17 @@ impl S3Api for SetBucketNotification {
 }
 
 impl ToS3Request for SetBucketNotification {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("notification"), String::new());
-
         let bytes: Bytes = self.config.to_xml().into();
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(bytes));
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "notification"))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/set_bucket_policy.rs

@@ -14,38 +14,36 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::Multimap;
 use crate::s3::response::SetBucketPolicyResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, insert};
 use bytes::Bytes;
 use http::Method;
 
 /// Argument builder for [set_bucket_policy()](crate::s3::client::Client::set_bucket_policy) API
 #[derive(Clone, Debug, Default)]
 pub struct SetBucketPolicy {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) config: String, //TODO consider PolicyConfig struct
+    config: String, //TODO consider PolicyConfig struct
 }
 
 impl SetBucketPolicy {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
 
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
@@ -73,36 +71,17 @@ impl S3Api for SetBucketPolicy {
 }
 
 impl ToS3Request for SetBucketPolicy {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("policy"), String::new());
-
-        let bytes: Bytes = self.config.to_string().into();
+        let bytes: Bytes = self.config.into();
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(bytes));
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "policy"))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/set_bucket_replication.rs

@@ -14,38 +14,36 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::Multimap;
 use crate::s3::response::SetBucketReplicationResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{ReplicationConfig, S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, insert};
 use bytes::Bytes;
 use http::Method;
 
 /// Argument builder for [set_bucket_replication()](crate::s3::client::Client::set_bucket_replication) API
 #[derive(Clone, Debug, Default)]
 pub struct SetBucketReplication {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) config: ReplicationConfig,
+    config: ReplicationConfig,
 }
 
 impl SetBucketReplication {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
 
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
@@ -73,36 +71,17 @@ impl S3Api for SetBucketReplication {
 }
 
 impl ToS3Request for SetBucketReplication {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("replication"), String::new());
-
         let bytes: Bytes = self.config.to_xml().into();
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(bytes));
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "replication"))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/set_bucket_tags.rs

@@ -14,11 +14,12 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::Multimap;
 use crate::s3::response::SetBucketTagsResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, insert};
 use bytes::Bytes;
 use http::Method;
 use std::collections::HashMap;
@@ -26,29 +27,25 @@ use std::collections::HashMap;
 /// Argument builder for [set_bucket_tags()](crate::s3::client::Client::set_bucket_tags) API
 #[derive(Clone, Debug, Default)]
 pub struct SetBucketTags {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) tags: HashMap<String, String>,
+    tags: HashMap<String, String>,
 }
 
 impl SetBucketTags {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -75,51 +72,35 @@ impl S3Api for SetBucketTags {
 }
 
 impl ToS3Request for SetBucketTags {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("tagging"), String::new());
-
-        let mut data = String::from("<Tagging>");
-        if !self.tags.is_empty() {
-            data.push_str("<TagSet>");
-            for (key, value) in self.tags.iter() {
-                data.push_str("<Tag>");
-                data.push_str("<Key>");
-                data.push_str(key);
-                data.push_str("</Key>");
-                data.push_str("<Value>");
-                data.push_str(value);
-                data.push_str("</Value>");
-                data.push_str("</Tag>");
+        let data: String = {
+            let mut data = String::from("<Tagging>");
+            if !self.tags.is_empty() {
+                data.push_str("<TagSet>");
+                for (key, value) in self.tags.iter() {
+                    data.push_str("<Tag>");
+                    data.push_str("<Key>");
+                    data.push_str(key);
+                    data.push_str("</Key>");
+                    data.push_str("<Value>");
+                    data.push_str(value);
+                    data.push_str("</Value>");
+                    data.push_str("</Tag>");
+                }
+                data.push_str("</TagSet>");
             }
-            data.push_str("</TagSet>");
-        }
-        data.push_str("</Tagging>");
-
+            data.push_str("</Tagging>");
+            data
+        };
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(Bytes::from(data)));
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
 
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "tagging"))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/set_bucket_versioning.rs

@@ -14,11 +14,12 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::Multimap;
 use crate::s3::response::SetBucketVersioningResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, insert};
 use bytes::Bytes;
 use http::Method;
 use std::fmt;
@@ -43,30 +44,26 @@ impl fmt::Display for VersioningStatus {
 /// Argument builder for [set_bucket_encryption()](crate::s3::client::Client::set_bucket_encryption) API
 #[derive(Clone, Debug, Default)]
 pub struct SetBucketVersioning {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) status: Option<VersioningStatus>,
-    pub(crate) mfa_delete: Option<bool>,
+    status: Option<VersioningStatus>,
+    mfa_delete: Option<bool>,
 }
 
 impl SetBucketVersioning {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -98,54 +95,38 @@ impl S3Api for SetBucketVersioning {
 }
 
 impl ToS3Request for SetBucketVersioning {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
+        let data: String = {
+            let mut data = "<VersioningConfiguration>".to_string();
 
-        query_params.insert("versioning".into(), String::new());
-
-        let mut data = "<VersioningConfiguration>".to_string();
-
-        if let Some(v) = self.mfa_delete {
-            data.push_str("<MFADelete>");
-            data.push_str(if v { "Enabled" } else { "Disabled" });
-            data.push_str("</MFADelete>");
-        }
-
-        match self.status {
-            Some(VersioningStatus::Enabled) => data.push_str("<Status>Enabled</Status>"),
-            Some(VersioningStatus::Suspended) => data.push_str("<Status>Suspended</Status>"),
-            None => {
-                return Err(Error::InvalidVersioningStatus(
-                    "Missing VersioningStatus".into(),
-                ));
+            if let Some(v) = self.mfa_delete {
+                data.push_str("<MFADelete>");
+                data.push_str(if v { "Enabled" } else { "Disabled" });
+                data.push_str("</MFADelete>");
             }
+
+            match self.status {
+                Some(VersioningStatus::Enabled) => data.push_str("<Status>Enabled</Status>"),
+                Some(VersioningStatus::Suspended) => data.push_str("<Status>Suspended</Status>"),
+                None => {
+                    return Err(Error::InvalidVersioningStatus(
+                        "Missing VersioningStatus".into(),
+                    ));
+                }
+            };
+
+            data.push_str("</VersioningConfiguration>");
+            data
         };
-
-        data.push_str("</VersioningConfiguration>");
-
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(Bytes::from(data)));
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
 
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "versioning"))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/set_object_lock_config.rs

@@ -14,11 +14,12 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::Multimap;
 use crate::s3::response::SetObjectLockConfigResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{ObjectLockConfig, S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, insert};
 use bytes::Bytes;
 use http::Method;
 
@@ -26,29 +27,25 @@ use http::Method;
 
 #[derive(Clone, Debug, Default)]
 pub struct SetObjectLockConfig {
-    pub(crate) client: Option<Client>,
+    client: Client,
 
-    pub(crate) extra_headers: Option<Multimap>,
-    pub(crate) extra_query_params: Option<Multimap>,
-    pub(crate) region: Option<String>,
-    pub(crate) bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub(crate) config: ObjectLockConfig,
+    config: ObjectLockConfig,
 }
 
 impl SetObjectLockConfig {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -75,36 +72,17 @@ impl S3Api for SetObjectLockConfig {
 }
 
 impl ToS3Request for SetObjectLockConfig {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        query_params.insert(String::from("object-lock"), String::new());
-
         let bytes: Bytes = self.config.to_xml().into();
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(bytes));
 
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
-            .query_params(query_params)
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .query_params(insert(self.extra_query_params, "object-lock"))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/set_object_retention.rs

@@ -14,45 +14,44 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::SetObjectRetentionResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{RetentionMode, S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, UtcTime, check_bucket_name, md5sum_hash, to_iso8601utc};
+use crate::s3::utils::{
+    UtcTime, check_bucket_name, check_object_name, insert, md5sum_hash, to_iso8601utc,
+};
 use bytes::Bytes;
 use http::Method;
 
 /// Argument builder for [set_object_retention()](Client::set_object_retention) API
 #[derive(Clone, Debug, Default)]
 pub struct SetObjectRetention {
-    pub client: Option<Client>,
+    client: Client,
 
-    pub extra_headers: Option<Multimap>,
-    pub extra_query_params: Option<Multimap>,
-    pub region: Option<String>,
-    pub bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub object: String,
-    pub version_id: Option<String>,
-    pub bypass_governance_mode: bool,
-    pub retention_mode: Option<RetentionMode>,
-    pub retain_until_date: Option<UtcTime>,
+    object: String,
+    version_id: Option<String>,
+    bypass_governance_mode: bool,
+    retention_mode: Option<RetentionMode>,
+    retain_until_date: Option<UtcTime>,
 }
 
 impl SetObjectRetention {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
-            bypass_governance_mode: false,
+            client,
+            bucket,
+            object,
             ..Default::default()
         }
     }
 
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
-
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
         self
@@ -68,11 +67,6 @@ impl SetObjectRetention {
         self
     }
 
-    pub fn object(mut self, object: String) -> Self {
-        self.object = object;
-        self
-    }
-
     pub fn version_id(mut self, version_id: Option<String>) -> Self {
         self.version_id = version_id;
         self
@@ -99,74 +93,49 @@ impl S3Api for SetObjectRetention {
 }
 
 impl ToS3Request for SetObjectRetention {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
-        //TODO move the following checks to a validate fn
-        check_bucket_name(&self.bucket, true)?;
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        {
+            check_bucket_name(&self.bucket, true)?;
+            check_object_name(&self.object)?;
 
-        if self.object.is_empty() {
-            return Err(Error::InvalidObjectName(String::from(
-                "object name cannot be empty",
-            )));
+            if self.retention_mode.is_some() ^ self.retain_until_date.is_some() {
+                return Err(Error::InvalidRetentionConfig(String::from(
+                    "both mode and retain_until_date must be set or unset",
+                )));
+            }
         }
 
-        if self.retention_mode.is_some() ^ self.retain_until_date.is_some() {
-            return Err(Error::InvalidRetentionConfig(String::from(
-                "both mode and retain_until_date must be set or unset",
-            )));
-        }
-
-        let mut headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
+        let data: String = {
+            let mut data: String = "<Retention>".into();
+            if let Some(v) = &self.retention_mode {
+                data.push_str("<Mode>");
+                data.push_str(&v.to_string());
+                data.push_str("</Mode>");
+            }
+            if let Some(v) = &self.retain_until_date {
+                data.push_str("<RetainUntilDate>");
+                data.push_str(&to_iso8601utc(*v));
+                data.push_str("</RetainUntilDate>");
+            }
+            data.push_str("</Retention>");
+            data
+        };
 
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
         if self.bypass_governance_mode {
-            headers.insert(
-                String::from("x-amz-bypass-governance-retention"),
-                String::from("true"),
-            );
+            headers.add("x-amz-bypass-governance-retention", "true");
         }
+        headers.add("Content-MD5", md5sum_hash(data.as_ref()));
 
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
+        let mut query_params: Multimap = insert(self.extra_query_params, "retention");
+        query_params.add_version(self.version_id);
 
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-        query_params.insert(String::from("retention"), String::new());
-
-        let mut data: String = String::from("<Retention>");
-        if let Some(v) = &self.retention_mode {
-            data.push_str("<Mode>");
-            data.push_str(&v.to_string());
-            data.push_str("</Mode>");
-        }
-        if let Some(v) = &self.retain_until_date {
-            data.push_str("<RetainUntilDate>");
-            data.push_str(&to_iso8601utc(*v));
-            data.push_str("</RetainUntilDate>");
-        }
-        data.push_str("</Retention>");
-
-        headers.insert(String::from("Content-MD5"), md5sum_hash(data.as_ref()));
-
-        let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(Bytes::from(data)));
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
-
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
             .query_params(query_params)
             .headers(headers)
-            .object(Some(&self.object))
-            .body(body);
-
-        Ok(req)
+            .object(Some(self.object))
+            .body(Some(SegmentedBytes::from(Bytes::from(data)))))
     }
 }

src/s3/builders/set_object_tags.rs

@@ -14,11 +14,12 @@
 // limitations under the License.
 
 use crate::s3::Client;
-use crate::s3::builders::SegmentedBytes;
 use crate::s3::error::Error;
+use crate::s3::multimap::{Multimap, MultimapExt};
 use crate::s3::response::SetObjectTagsResponse;
+use crate::s3::segmented_bytes::SegmentedBytes;
 use crate::s3::types::{S3Api, S3Request, ToS3Request};
-use crate::s3::utils::{Multimap, check_bucket_name};
+use crate::s3::utils::{check_bucket_name, check_object_name, insert};
 use bytes::Bytes;
 use http::Method;
 use std::collections::HashMap;
@@ -26,29 +27,27 @@ use std::collections::HashMap;
 /// Argument builder for [set_object_tags()](Client::set_object_tags) API
 #[derive(Clone, Debug, Default)]
 pub struct SetObjectTags {
-    pub client: Option<Client>,
+    client: Client,
 
-    pub extra_headers: Option<Multimap>,
-    pub extra_query_params: Option<Multimap>,
-    pub region: Option<String>,
-    pub bucket: String,
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    region: Option<String>,
+    bucket: String,
 
-    pub object: String,
-    pub version_id: Option<String>,
-    pub tags: HashMap<String, String>,
+    object: String,
+    version_id: Option<String>,
+    tags: HashMap<String, String>,
 }
 
 impl SetObjectTags {
-    pub fn new(bucket: &str) -> Self {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
         Self {
-            bucket: bucket.to_owned(),
+            client,
+            bucket,
+            object,
             ..Default::default()
         }
     }
-    pub fn client(mut self, client: &Client) -> Self {
-        self.client = Some(client.clone());
-        self
-    }
 
     pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
         self.extra_headers = extra_headers;
@@ -65,11 +64,6 @@ impl SetObjectTags {
         self
     }
 
-    pub fn object(mut self, object: String) -> Self {
-        self.object = object;
-        self
-    }
-
     pub fn version_id(mut self, version_id: Option<String>) -> Self {
         self.version_id = version_id;
         self
@@ -86,63 +80,40 @@ impl S3Api for SetObjectTags {
 }
 
 impl ToS3Request for SetObjectTags {
-    fn to_s3request(&self) -> Result<S3Request, Error> {
+    fn to_s3request(self) -> Result<S3Request, Error> {
         check_bucket_name(&self.bucket, true)?;
+        check_object_name(&self.object)?;
 
-        // TODO add to all other function (that use object) the following test
-        // TODO should it be moved to the object setter function? or use validate as in put_object
-        if self.object.is_empty() {
-            return Err(Error::InvalidObjectName(String::from(
-                "object name cannot be empty",
-            )));
-        }
+        let mut query_params: Multimap = insert(self.extra_query_params, "tagging");
+        query_params.add_version(self.version_id);
 
-        let headers = self
-            .extra_headers
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-        let mut query_params = self
-            .extra_query_params
-            .as_ref()
-            .filter(|v| !v.is_empty())
-            .cloned()
-            .unwrap_or_default();
-
-        if let Some(v) = &self.version_id {
-            query_params.insert(String::from("versionId"), v.to_string());
-        }
-        query_params.insert("tagging".into(), String::new());
-
-        let mut data = String::from("<Tagging>");
-        if !self.tags.is_empty() {
-            data.push_str("<TagSet>");
-            for (key, value) in self.tags.iter() {
-                data.push_str("<Tag>");
-                data.push_str("<Key>");
-                data.push_str(key);
-                data.push_str("</Key>");
-                data.push_str("<Value>");
-                data.push_str(value);
-                data.push_str("</Value>");
-                data.push_str("</Tag>");
+        let data: String = {
+            let mut data = String::from("<Tagging>");
+            if !self.tags.is_empty() {
+                data.push_str("<TagSet>");
+                for (key, value) in self.tags.iter() {
+                    data.push_str("<Tag>");
+                    data.push_str("<Key>");
+                    data.push_str(key);
+                    data.push_str("</Key>");
+                    data.push_str("<Value>");
+                    data.push_str(value);
+                    data.push_str("</Value>");
+                    data.push_str("</Tag>");
+                }
+                data.push_str("</TagSet>");
             }
-            data.push_str("</TagSet>");
-        }
-        data.push_str("</Tagging>");
-
+            data.push_str("</Tagging>");
+            data
+        };
         let body: Option<SegmentedBytes> = Some(SegmentedBytes::from(Bytes::from(data)));
-        let client: &Client = self.client.as_ref().ok_or(Error::NoClientProvided)?;
 
-        let req = S3Request::new(client, Method::PUT)
-            .region(self.region.as_deref())
-            .bucket(Some(&self.bucket))
+        Ok(S3Request::new(self.client, Method::PUT)
+            .region(self.region)
+            .bucket(Some(self.bucket))
             .query_params(query_params)
-            .object(Some(&self.object))
-            .headers(headers)
-            .body(body);
-
-        Ok(req)
+            .object(Some(self.object))
+            .headers(self.extra_headers.unwrap_or_default())
+            .body(body))
     }
 }

src/s3/builders/stat_object.rs

@@ -0,0 +1,162 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2023 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use async_trait::async_trait;
+use http::Method;
+
+use crate::s3::multimap::{Multimap, MultimapExt};
+use crate::s3::response::StatObjectResponse;
+use crate::s3::utils::check_object_name;
+use crate::s3::{
+    client::Client,
+    error::Error,
+    sse::{Sse, SseCustomerKey},
+    types::{S3Api, S3Request, ToS3Request},
+    utils::{UtcTime, check_bucket_name, to_http_header_value},
+};
+
+/// Argument builder for [list_objects()](Client::get_object) API.
+#[derive(Debug, Clone, Default)]
+pub struct StatObject {
+    client: Client,
+
+    extra_headers: Option<Multimap>,
+    extra_query_params: Option<Multimap>,
+    bucket: String,
+    object: String,
+    version_id: Option<String>,
+    offset: Option<u64>,
+    length: Option<u64>,
+    region: Option<String>,
+    ssec: Option<SseCustomerKey>,
+
+    // Conditionals
+    match_etag: Option<String>,
+    not_match_etag: Option<String>,
+    modified_since: Option<UtcTime>,
+    unmodified_since: Option<UtcTime>,
+}
+
+impl StatObject {
+    pub fn new(client: Client, bucket: String, object: String) -> Self {
+        Self {
+            client,
+            bucket,
+            object,
+            ..Default::default()
+        }
+    }
+
+    pub fn extra_headers(mut self, extra_headers: Option<Multimap>) -> Self {
+        self.extra_headers = extra_headers;
+        self
+    }
+
+    pub fn extra_query_params(mut self, extra_query_params: Option<Multimap>) -> Self {
+        self.extra_query_params = extra_query_params;
+        self
+    }
+
+    pub fn version_id(mut self, version_id: Option<String>) -> Self {
+        self.version_id = version_id;
+        self
+    }
+
+    pub fn offset(mut self, offset: Option<u64>) -> Self {
+        self.offset = offset;
+        self
+    }
+
+    pub fn length(mut self, length: Option<u64>) -> Self {
+        self.length = length;
+        self
+    }
+
+    pub fn region(mut self, region: Option<String>) -> Self {
+        self.region = region;
+        self
+    }
+
+    pub fn ssec(mut self, ssec: Option<SseCustomerKey>) -> Self {
+        self.ssec = ssec;
+        self
+    }
+
+    pub fn match_etag(mut self, etag: Option<String>) -> Self {
+        self.match_etag = etag;
+        self
+    }
+
+    pub fn not_match_etag(mut self, etag: Option<String>) -> Self {
+        self.not_match_etag = etag;
+        self
+    }
+
+    pub fn modified_since(mut self, time: Option<UtcTime>) -> Self {
+        self.modified_since = time;
+        self
+    }
+
+    pub fn unmodified_since(mut self, time: Option<UtcTime>) -> Self {
+        self.unmodified_since = time;
+        self
+    }
+}
+
+impl S3Api for StatObject {
+    type S3Response = StatObjectResponse;
+}
+
+#[async_trait]
+impl ToS3Request for StatObject {
+    fn to_s3request(self) -> Result<S3Request, Error> {
+        {
+            check_bucket_name(&self.bucket, true)?;
+            check_object_name(&self.object)?;
+            if self.ssec.is_some() && !self.client.is_secure() {
+                return Err(Error::SseTlsRequired(None));
+            }
+        }
+
+        let mut headers: Multimap = self.extra_headers.unwrap_or_default();
+        {
+            if let Some(v) = self.match_etag {
+                headers.add("if-match", v);
+            }
+            if let Some(v) = self.not_match_etag {
+                headers.add("if-none-match", v);
+            }
+            if let Some(v) = self.modified_since {
+                headers.add("if-modified-since", to_http_header_value(v));
+            }
+            if let Some(v) = self.unmodified_since {
+                headers.add("if-unmodified-since", to_http_header_value(v));
+            }
+            if let Some(v) = self.ssec {
+                headers.add_multimap(v.headers());
+            }
+        }
+
+        let mut query_params: Multimap = self.extra_query_params.unwrap_or_default();
+        query_params.add_version(self.version_id);
+
+        Ok(S3Request::new(self.client, Method::GET)
+            .region(self.region)
+            .bucket(Some(self.bucket))
+            .object(Some(self.object))
+            .query_params(query_params)
+            .headers(headers))
+    }
+}

src/s3/client/append_object.rs

@@ -0,0 +1,55 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// ! S3 APIs for appending objects.
+
+use super::Client;
+use crate::s3::builders::ObjectContent;
+use crate::s3::builders::{AppendObject, AppendObjectContent};
+use crate::s3::segmented_bytes::SegmentedBytes;
+
+impl Client {
+    /// Creates an AppendObject request builder to append data to the end of an (existing) object.
+    /// This is a lower-level API that performs a non-multipart object upload.
+    ///
+    /// 🛈 This operation is not supported for regular non-express buckets.
+    pub fn append_object<S: Into<String>>(
+        &self,
+        bucket: S,
+        object: S,
+        data: SegmentedBytes,
+        offset_bytes: u64,
+    ) -> AppendObject {
+        AppendObject::new(
+            self.clone(),
+            bucket.into(),
+            object.into(),
+            data,
+            offset_bytes,
+        )
+    }
+
+    /// Creates an AppendObjectContent request builder to append data to the end of an existing
+    /// object. The content is streamed and appended to MinIO/S3. This is a higher-level API that
+    /// handles multipart appends transparently.
+    pub fn append_object_content<S: Into<String>, C: Into<ObjectContent>>(
+        &self,
+        bucket: S,
+        object: S,
+        content: C,
+    ) -> AppendObjectContent {
+        AppendObjectContent::new(self.clone(), bucket.into(), object.into(), content)
+    }
+}

src/s3/client/bucket_exists.rs

@@ -19,8 +19,28 @@ use super::Client;
 use crate::s3::builders::BucketExists;
 
 impl Client {
-    /// Create a BucketExists request builder.
-    pub fn bucket_exists(&self, bucket: &str) -> BucketExists {
-        BucketExists::new(bucket).client(self)
+    /// Creates a [`BucketExists`] request builder.
+    ///
+    /// To execute the request, call [`BucketExists::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`BucketExistsResponse`](crate::s3::response::BucketExistsResponse).    
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::BucketExistsResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {    
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: BucketExistsResponse =
+    ///         client.bucket_exists("bucket-name").send().await.unwrap();
+    ///     println!("bucket '{}' exists: {}", resp.bucket, resp.exists);
+    /// }
+    /// ```
+    pub fn bucket_exists<S: Into<String>>(&self, bucket: S) -> BucketExists {
+        BucketExists::new(self.clone(), bucket.into())
     }
 }

src/s3/client/copy_object.rs

@@ -0,0 +1,69 @@
+// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
+// Copyright 2025 MinIO, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! S3 APIs for bucket objects.
+
+use super::Client;
+use crate::s3::builders::{
+    ComposeObject, ComposeObjectInternal, ComposeSource, CopyObject, CopyObjectInternal,
+    UploadPartCopy,
+};
+
+impl Client {
+    /// Executes [UploadPartCopy](https://docs.aws.amazon.com/AmazonS3/latest/API/API_UploadPartCopy.html) S3 API
+    pub fn upload_part_copy<S1: Into<String>, S2: Into<String>, S3: Into<String>>(
+        &self,
+        bucket: S1,
+        object: S2,
+        upload_id: S3,
+    ) -> UploadPartCopy {
+        UploadPartCopy::new(self.clone(), bucket.into(), object.into(), upload_id.into())
+    }
+
+    /// Create a CopyObject request builder. This is a lower-level API that
+    /// performs a non-multipart object copy.
+    pub fn copy_object_internal<S1: Into<String>, S2: Into<String>>(
+        &self,
+        bucket: S1,
+        object: S2,
+    ) -> CopyObjectInternal {
+        CopyObjectInternal::new(self.clone(), bucket.into(), object.into())
+    }
+
+    /// copy object is a high-order API that calls [`stat_object`] and based on the results calls
+    /// either [`compose_object`] or [`copy_object_internal`]  to copy the object.
+    pub fn copy_object<S: Into<String>>(&self, bucket: S, object: S) -> CopyObject {
+        CopyObject::new(self.clone(), bucket.into(), object.into())
+    }
+
+    pub(crate) fn compose_object_internal<S1: Into<String>, S2: Into<String>>(
+        &self,
+        bucket: S1,
+        object: S2,
+    ) -> ComposeObjectInternal {
+        ComposeObjectInternal::new(self.clone(), bucket.into(), object.into())
+    }
+
+    /// compose object is high-order API that calls [`compose_object_internal`] and if that call fails,
+    /// it calls ['abort_multipart_upload`].
+    pub fn compose_object<S1: Into<String>, S2: Into<String>>(
+        &self,
+        bucket: S1,
+        object: S2,
+        sources: Vec<ComposeSource>,
+    ) -> ComposeObject {
+        ComposeObject::new(self.clone(), bucket.into(), object.into()).sources(sources)
+    }
+}

src/s3/client/delete_bucket_encryption.rs

@@ -19,8 +19,28 @@ use super::Client;
 use crate::s3::builders::DeleteBucketEncryption;
 
 impl Client {
-    /// Create a DeleteBucketEncryption request builder.
-    pub fn delete_bucket_encryption(&self, bucket: &str) -> DeleteBucketEncryption {
-        DeleteBucketEncryption::new(bucket).client(self)
+    /// Creates a [`DeleteBucketEncryption`] request builder.
+    ///
+    /// To execute the request, call [`DeleteBucketEncryption::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`BucketExistsResponse`](crate::s3::response::BucketExistsResponse).    
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::DeleteBucketEncryptionResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {    
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: DeleteBucketEncryptionResponse =
+    ///         client.delete_bucket_encryption("bucket-name").send().await.unwrap();
+    ///     println!("bucket '{}' is deleted", resp.bucket);
+    /// }
+    /// ```
+    pub fn delete_bucket_encryption<S: Into<String>>(&self, bucket: S) -> DeleteBucketEncryption {
+        DeleteBucketEncryption::new(self.clone(), bucket.into())
     }
 }

src/s3/client/delete_bucket_lifecycle.rs

@@ -19,8 +19,28 @@ use super::Client;
 use crate::s3::builders::DeleteBucketLifecycle;
 
 impl Client {
-    /// Create a DeleteBucketLifecycle request builder.
-    pub fn delete_bucket_lifecycle(&self, bucket: &str) -> DeleteBucketLifecycle {
-        DeleteBucketLifecycle::new(bucket).client(self)
+    /// Creates a [`DeleteBucketLifecycle`] request builder.
+    ///
+    /// To execute the request, call [`DeleteBucketLifecycle::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`DeleteBucketLifecycleResponse`](crate::s3::response::DeleteBucketLifecycleResponse).    
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::DeleteBucketLifecycleResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {    
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: DeleteBucketLifecycleResponse =
+    ///         client.delete_bucket_lifecycle("bucket-name").send().await.unwrap();
+    ///     println!("lifecycle of bucket '{}' is deleted", resp.bucket);
+    /// }
+    /// ```
+    pub fn delete_bucket_lifecycle<S: Into<String>>(&self, bucket: S) -> DeleteBucketLifecycle {
+        DeleteBucketLifecycle::new(self.clone(), bucket.into())
     }
 }

src/s3/client/delete_bucket_notification.rs

@@ -19,8 +19,31 @@ use super::Client;
 use crate::s3::builders::DeleteBucketNotification;
 
 impl Client {
-    /// Create a DeleteBucketNotification request builder.
-    pub fn delete_bucket_notification(&self, bucket: &str) -> DeleteBucketNotification {
-        DeleteBucketNotification::new(bucket).client(self)
+    /// Creates a [`DeleteBucketNotification`] request builder.
+    ///
+    /// To execute the request, call [`DeleteBucketNotification::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`DeleteBucketNotificationResponse`](crate::s3::response::DeleteBucketNotificationResponse).    
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::DeleteBucketNotificationResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {    
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: DeleteBucketNotificationResponse =
+    ///         client.delete_bucket_notification("bucket-name").send().await.unwrap();
+    ///     println!("notification of bucket '{}' is deleted", resp.bucket);
+    /// }
+    /// ```
+    pub fn delete_bucket_notification<S: Into<String>>(
+        &self,
+        bucket: S,
+    ) -> DeleteBucketNotification {
+        DeleteBucketNotification::new(self.clone(), bucket.into())
     }
 }

src/s3/client/delete_bucket_policy.rs

@@ -20,7 +20,28 @@ use crate::s3::builders::DeleteBucketPolicy;
 
 impl Client {
     /// Create a DeleteBucketPolicy request builder.
-    pub fn delete_bucket_policy(&self, bucket: &str) -> DeleteBucketPolicy {
-        DeleteBucketPolicy::new(bucket).client(self)
+    /// Creates a [`DeleteBucketPolicy`] request builder.
+    ///
+    /// To execute the request, call [`DeleteBucketPolicy::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`DeleteBucketPolicyResponse`](crate::s3::response::DeleteBucketPolicyResponse).    
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::DeleteBucketPolicyResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {    
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: DeleteBucketPolicyResponse =
+    ///         client.delete_bucket_policy("bucket-name").send().await.unwrap();
+    ///     println!("policy of bucket '{}' is deleted", resp.bucket);
+    /// }
+    /// ```
+    pub fn delete_bucket_policy<S: Into<String>>(&self, bucket: S) -> DeleteBucketPolicy {
+        DeleteBucketPolicy::new(self.clone(), bucket.into())
     }
 }

src/s3/client/delete_bucket_replication.rs

@@ -19,8 +19,30 @@ use super::Client;
 use crate::s3::builders::DeleteBucketReplication;
 
 impl Client {
-    /// Create a DeleteBucketReplication request builder.
-    pub fn delete_bucket_replication(&self, bucket: &str) -> DeleteBucketReplication {
-        DeleteBucketReplication::new(bucket).client(self)
+    /// Creates a [`DeleteBucketReplication`] request builder.
+    ///
+    /// To execute the request, call [`DeleteBucketReplication::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`DeleteBucketReplicationResponse`](crate::s3::response::DeleteBucketReplicationResponse).    
+    ///
+    /// 🛈 This operation is not supported for express buckets.
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::DeleteBucketReplicationResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {    
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: DeleteBucketReplicationResponse =
+    ///         client.delete_bucket_replication("bucket-name").send().await.unwrap();
+    ///     println!("replication of bucket '{}' is deleted", resp.bucket);
+    /// }
+    /// ```
+    pub fn delete_bucket_replication<S: Into<String>>(&self, bucket: S) -> DeleteBucketReplication {
+        DeleteBucketReplication::new(self.clone(), bucket.into())
     }
 }

src/s3/client/delete_bucket_tags.rs

@@ -19,8 +19,30 @@ use super::Client;
 use crate::s3::builders::DeleteBucketTags;
 
 impl Client {
-    /// Create a DeleteBucketTags request builder.
-    pub fn delete_bucket_tags(&self, bucket: &str) -> DeleteBucketTags {
-        DeleteBucketTags::new(bucket).client(self)
+    /// Creates a [`DeleteBucketTags`] request builder.
+    ///
+    /// To execute the request, call [`DeleteBucketTagsResponse::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`DeleteBucketTagsResponse`](crate::s3::response::DeleteBucketTagsResponse).    
+    ///
+    /// 🛈 This operation is not supported for express buckets.
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::DeleteBucketTagsResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {    
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: DeleteBucketTagsResponse =
+    ///         client.delete_bucket_tags("bucket-name").send().await.unwrap();
+    ///     println!("tags of bucket '{}' are deleted", resp.bucket);
+    /// }
+    /// ```
+    pub fn delete_bucket_tags<S: Into<String>>(&self, bucket: S) -> DeleteBucketTags {
+        DeleteBucketTags::new(self.clone(), bucket.into())
     }
 }

src/s3/client/delete_object_lock_config.rs

@@ -19,8 +19,43 @@ use super::Client;
 use crate::s3::builders::DeleteObjectLockConfig;
 
 impl Client {
-    /// Create a DeleteObjectLockConfig request builder.
-    pub fn delete_object_lock_config(&self, bucket: &str) -> DeleteObjectLockConfig {
-        DeleteObjectLockConfig::new(bucket).client(self)
+    /// Creates a [`DeleteObjectLockConfig`] request builder.
+    ///
+    /// To execute the request, call [`DeleteObjectLockConfig::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`DeleteObjectLockConfigResponse`](crate::s3::response::DeleteObjectLockConfigResponse).    
+    ///
+    /// 🛈 This operation is not supported for express buckets.
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::{DeleteObjectLockConfigResponse, MakeBucketResponse, SetObjectLockConfigResponse};
+    /// use minio::s3::types::{S3Api, ObjectLockConfig, RetentionMode};
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {    
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let bucket_name = "bucket-name";
+    ///
+    ///     let resp: MakeBucketResponse =
+    ///         client.make_bucket(bucket_name).object_lock(true).send().await.unwrap();
+    ///     println!("created bucket '{}' with object locking enabled", resp.bucket);
+    ///
+    ///     const DURATION_DAYS: i32 = 7;
+    ///     let config = ObjectLockConfig::new(RetentionMode::GOVERNANCE, Some(DURATION_DAYS), None).unwrap();
+    ///
+    ///     let resp: SetObjectLockConfigResponse =     
+    ///         client.set_object_lock_config(bucket_name).config(config).send().await.unwrap();
+    ///     println!("configured object locking for bucket '{}'", resp.bucket);
+    ///
+    ///     let resp: DeleteObjectLockConfigResponse =
+    ///         client.delete_object_lock_config(bucket_name).send().await.unwrap();
+    ///     println!("object locking of bucket '{}' is deleted", resp.bucket);
+    /// }
+    /// ```
+    pub fn delete_object_lock_config<S: Into<String>>(&self, bucket: S) -> DeleteObjectLockConfig {
+        DeleteObjectLockConfig::new(self.clone(), bucket.into())
     }
 }

src/s3/client/delete_object_tags.rs

@@ -19,8 +19,34 @@ use super::Client;
 use crate::s3::builders::DeleteObjectTags;
 
 impl Client {
-    /// Create a DeleteObjectTags request builder.
-    pub fn delete_object_tags(&self, bucket: &str) -> DeleteObjectTags {
-        DeleteObjectTags::new(bucket).client(self)
+    /// Creates a [`DeleteObjectTags`] request builder.
+    ///
+    /// To execute the request, call [`DeleteObjectTags::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`DeleteObjectTagsResponse`](crate::s3::response::DeleteObjectTagsResponse).
+    ///
+    /// 🛈 This operation is not supported for express buckets.
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::DeleteObjectTagsResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: DeleteObjectTagsResponse =
+    ///         client.delete_object_tags("bucket-name", "object_name").send().await.unwrap();
+    ///     println!("legal hold of object '{}' in bucket '{}' is deleted", resp.object, resp.bucket);
+    /// }
+    /// ```
+    pub fn delete_object_tags<S1: Into<String>, S2: Into<String>>(
+        &self,
+        bucket: S1,
+        object: S2,
+    ) -> DeleteObjectTags {
+        DeleteObjectTags::new(self.clone(), bucket.into(), object.into())
     }
 }

src/s3/client/disable_object_legal_hold.rs

@@ -19,8 +19,34 @@ use super::Client;
 use crate::s3::builders::DisableObjectLegalHold;
 
 impl Client {
-    /// Create a DisableObjectLegalHold request builder.
-    pub fn disable_object_legal_hold(&self, bucket: &str) -> DisableObjectLegalHold {
-        DisableObjectLegalHold::new(bucket).client(self)
+    /// Creates a [`DisableObjectLegalHold`] request builder.
+    ///
+    /// To execute the request, call [`DisableObjectLegalHold::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`DisableObjectLegalHoldResponse`](crate::s3::response::DisableObjectLegalHoldResponse).
+    ///
+    /// 🛈 This operation is not supported for express buckets.
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::DisableObjectLegalHoldResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: DisableObjectLegalHoldResponse =
+    ///         client.disable_object_legal_hold("bucket-name", "object-name").send().await.unwrap();
+    ///     println!("legal hold of bucket '{}' is deleted", resp.bucket);
+    /// }
+    /// ```
+    pub fn disable_object_legal_hold<S1: Into<String>, S2: Into<String>>(
+        &self,
+        bucket: S1,
+        object: S2,
+    ) -> DisableObjectLegalHold {
+        DisableObjectLegalHold::new(self.clone(), bucket.into(), object.into())
     }
 }

src/s3/client/enable_object_legal_hold.rs

@@ -19,8 +19,34 @@ use super::Client;
 use crate::s3::builders::EnableObjectLegalHold;
 
 impl Client {
-    /// Create a EnableObjectLegalHold request builder.
-    pub fn enable_object_legal_hold(&self, bucket: &str) -> EnableObjectLegalHold {
-        EnableObjectLegalHold::new(bucket).client(self)
+    /// Creates a [`EnableObjectLegalHold`] request builder.
+    ///
+    /// To execute the request, call [`EnableObjectLegalHold::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`EnableObjectLegalHoldResponse`](crate::s3::response::EnableObjectLegalHoldResponse).
+    ///
+    /// 🛈 This operation is not supported for express buckets.
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::EnableObjectLegalHoldResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: EnableObjectLegalHoldResponse =
+    ///         client.enable_object_legal_hold("bucket-name", "object-name").send().await.unwrap();
+    ///     println!("legal hold of object '{}' in bucket '{}' is enabled", resp.object, resp.bucket);
+    /// }
+    /// ```
+    pub fn enable_object_legal_hold<S1: Into<String>, S2: Into<String>>(
+        &self,
+        bucket: S1,
+        object: S2,
+    ) -> EnableObjectLegalHold {
+        EnableObjectLegalHold::new(self.clone(), bucket.into(), object.into())
     }
 }

src/s3/client/get_bucket_encryption.rs

@@ -19,8 +19,28 @@ use super::Client;
 use crate::s3::builders::GetBucketEncryption;
 
 impl Client {
-    /// Create a GetBucketEncryption request builder.
-    pub fn get_bucket_encryption(&self, bucket: &str) -> GetBucketEncryption {
-        GetBucketEncryption::new(bucket).client(self)
+    /// Creates a [`GetBucketEncryption`] request builder.
+    ///
+    /// To execute the request, call [`GetBucketEncryption::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`GetBucketEncryptionResponse`](crate::s3::response::GetBucketEncryptionResponse).
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::GetBucketEncryptionResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: GetBucketEncryptionResponse =
+    ///         client.get_bucket_encryption("bucket-name").send().await.unwrap();
+    ///     println!("retrieved SseConfig '{:?}' from bucket '{}' is enabled", resp.config, resp.bucket);
+    /// }
+    /// ```
+    pub fn get_bucket_encryption<S: Into<String>>(&self, bucket: S) -> GetBucketEncryption {
+        GetBucketEncryption::new(self.clone(), bucket.into())
     }
 }

src/s3/client/get_bucket_lifecycle.rs

@@ -20,7 +20,29 @@ use crate::s3::builders::GetBucketLifecycle;
 
 impl Client {
     /// Create a GetBucketLifecycle request builder.
-    pub fn get_bucket_lifecycle(&self, bucket: &str) -> GetBucketLifecycle {
-        GetBucketLifecycle::new(bucket).client(self)
+    ///
+    /// Creates a [`GetBucketLifecycle`] request builder.
+    ///
+    /// To execute the request, call [`GetBucketLifecycle::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`GetBucketLifecycleResponse`](crate::s3::response::GetBucketLifecycleResponse).
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::GetBucketLifecycleResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: GetBucketLifecycleResponse =
+    ///         client.get_bucket_lifecycle("bucket-name").send().await.unwrap();
+    ///     println!("retrieved bucket lifecycle config '{:?}' from bucket '{}' is enabled", resp.config, resp.bucket);
+    /// }
+    /// ```
+    pub fn get_bucket_lifecycle<S: Into<String>>(&self, bucket: S) -> GetBucketLifecycle {
+        GetBucketLifecycle::new(self.clone(), bucket.into())
     }
 }

src/s3/client/get_bucket_notification.rs

@@ -19,8 +19,28 @@ use super::Client;
 use crate::s3::builders::GetBucketNotification;
 
 impl Client {
-    /// Create a GetBucketNotification request builder.
-    pub fn get_bucket_notification(&self, bucket: &str) -> GetBucketNotification {
-        GetBucketNotification::new(bucket).client(self)
+    /// Creates a [`GetBucketNotification`] request builder.
+    ///
+    /// To execute the request, call [`GetBucketNotification::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`GetBucketNotificationResponse`](crate::s3::response::GetBucketNotificationResponse).
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::GetBucketNotificationResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: GetBucketNotificationResponse =
+    ///         client.get_bucket_notification("bucket-name").send().await.unwrap();
+    ///     println!("retrieved bucket notification config '{:?}' from bucket '{}' is enabled", resp.config, resp.bucket);
+    /// }
+    /// ```
+    pub fn get_bucket_notification<S: Into<String>>(&self, bucket: S) -> GetBucketNotification {
+        GetBucketNotification::new(self.clone(), bucket.into())
     }
 }

src/s3/client/get_bucket_policy.rs

@@ -19,8 +19,28 @@ use super::Client;
 use crate::s3::builders::GetBucketPolicy;
 
 impl Client {
-    /// Create a GetBucketPolicy request builder.
-    pub fn get_bucket_policy(&self, bucket: &str) -> GetBucketPolicy {
-        GetBucketPolicy::new(bucket).client(self)
+    /// Creates a [`GetBucketPolicy`] request builder.
+    ///
+    /// To execute the request, call [`GetBucketPolicy::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`GetBucketPolicyResponse`](crate::s3::response::GetBucketPolicyResponse).
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::GetBucketPolicyResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: GetBucketPolicyResponse =
+    ///         client.get_bucket_policy("bucket-name").send().await.unwrap();
+    ///     println!("retrieved bucket policy config '{:?}' from bucket '{}' is enabled", resp.config, resp.bucket);
+    /// }
+    /// ```
+    pub fn get_bucket_policy<S: Into<String>>(&self, bucket: S) -> GetBucketPolicy {
+        GetBucketPolicy::new(self.clone(), bucket.into())
     }
 }

src/s3/client/get_bucket_replication.rs

@@ -19,8 +19,30 @@ use super::Client;
 use crate::s3::builders::GetBucketReplication;
 
 impl Client {
-    /// Create a GetBucketReplication request builder.
-    pub fn get_bucket_replication(&self, bucket: &str) -> GetBucketReplication {
-        GetBucketReplication::new(bucket).client(self)
+    /// Creates a [`GetBucketReplication`] request builder.
+    ///
+    /// To execute the request, call [`GetBucketReplication::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`GetBucketReplicationResponse`](crate::s3::response::GetBucketReplicationResponse).
+    ///
+    /// 🛈 This operation is not supported for express buckets.
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::GetBucketReplicationResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: GetBucketReplicationResponse =
+    ///         client.get_bucket_replication("bucket-name").send().await.unwrap();
+    ///     println!("retrieved bucket replication config '{:?}' from bucket '{}' is enabled", resp.config, resp.bucket);
+    /// }
+    /// ```
+    pub fn get_bucket_replication<S: Into<String>>(&self, bucket: S) -> GetBucketReplication {
+        GetBucketReplication::new(self.clone(), bucket.into())
     }
 }

src/s3/client/get_bucket_tags.rs

@@ -19,8 +19,30 @@ use super::Client;
 use crate::s3::builders::GetBucketTags;
 
 impl Client {
-    /// Create a GetBucketTags request builder.
-    pub fn get_bucket_tags(&self, bucket: &str) -> GetBucketTags {
-        GetBucketTags::new(bucket).client(self)
+    /// Creates a [`GetBucketTags`] request builder.
+    ///
+    /// To execute the request, call [`GetBucketTags::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`GetBucketTagsResponse`](crate::s3::response::GetBucketTagsResponse).
+    ///
+    /// 🛈 This operation is not supported for express buckets.
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::GetBucketTagsResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: GetBucketTagsResponse =
+    ///         client.get_bucket_tags("bucket-name").send().await.unwrap();
+    ///     println!("retrieved bucket tags '{:?}' from bucket '{}' is enabled", resp.tags, resp.bucket);
+    /// }
+    /// ```
+    pub fn get_bucket_tags<S: Into<String>>(&self, bucket: S) -> GetBucketTags {
+        GetBucketTags::new(self.clone(), bucket.into())
     }
 }

src/s3/client/get_bucket_versioning.rs

@@ -19,8 +19,30 @@ use super::Client;
 use crate::s3::builders::GetBucketVersioning;
 
 impl Client {
-    /// Create a GetBucketVersioning request builder.
-    pub fn get_bucket_versioning(&self, bucket: &str) -> GetBucketVersioning {
-        GetBucketVersioning::new(bucket).client(self)
+    /// Creates a [`GetBucketVersioning`] request builder.
+    ///
+    /// To execute the request, call [`GetBucketVersioning::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`GetBucketVersioningResponse`](crate::s3::response::GetBucketVersioningResponse).
+    ///
+    /// 🛈 This operation is not supported for express buckets.
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::GetBucketVersioningResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: GetBucketVersioningResponse =
+    ///         client.get_bucket_versioning("bucket-name").send().await.unwrap();
+    ///     println!("retrieved versioning status '{:?}' from bucket '{}' is enabled", resp.status, resp.bucket);
+    /// }
+    /// ```
+    pub fn get_bucket_versioning<S: Into<String>>(&self, bucket: S) -> GetBucketVersioning {
+        GetBucketVersioning::new(self.clone(), bucket.into())
     }
 }

src/s3/client/get_object.rs

@@ -15,13 +15,38 @@
 
 //! S3 APIs for downloading objects.
 
+use super::Client;
 use crate::s3::builders::GetObject;
 
-use super::Client;
-
 impl Client {
-    /// Create a GetObject request builder.
-    pub fn get_object(&self, bucket: &str, object: &str) -> GetObject {
-        GetObject::new(bucket, object).client(self)
+    /// Creates a [`GetObject`] request builder.
+    ///
+    /// To execute the request, call [`GetObject::send()`](crate::s3::types::S3Api::send),
+    /// which returns a [`Result`] containing a [`GetObjectResponse`](crate::s3::response::GetObjectResponse).
+    ///
+    /// # Example
+    ///
+    /// ```no_run
+    /// use minio::s3::Client;
+    /// use minio::s3::response::GetObjectResponse;
+    /// use minio::s3::types::S3Api;
+    ///
+    ///
+    /// #[tokio::main]
+    /// async fn main() {
+    ///     let client: Client = Default::default(); // configure your client here
+    ///     let resp: GetObjectResponse =
+    ///         client.get_object("bucket-name", "object-name").send().await.unwrap();
+    ///     let content_bytes = resp.content.to_segmented_bytes().await.unwrap().to_bytes();
+    ///     let content_str = String::from_utf8(content_bytes.to_vec()).unwrap();
+    ///     println!("retrieved content '{}'", content_str);
+    /// }
+    /// ```
+    pub fn get_object<S1: Into<String>, S2: Into<String>>(
+        &self,
+        bucket: S1,
+        object: S2,
+    ) -> GetObject {
+        GetObject::new(self.clone(), bucket.into(), object.into())
     }
 }