407 lines
15 KiB
Swift
407 lines
15 KiB
Swift
import Foundation
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// 添加登出通知
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extension Notification.Name {
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static let userDidLogoutNotification = Notification.Name("UserDidLogoutNotification")
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}
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// 请求标识符
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private struct RequestIdentifier {
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static var currentId: Int = 0
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static var lock = NSLock()
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static func next() -> Int {
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lock.lock()
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defer { lock.unlock() }
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currentId += 1
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return currentId
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}
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}
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enum NetworkError: Error {
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case invalidURL
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case noData
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case decodingError(Error)
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case serverError(String)
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case unauthorized
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case other(Error)
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case networkError(Error)
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case unknownError(Error)
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var localizedDescription: String {
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switch self {
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case .invalidURL:
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return "无效的URL"
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case .noData:
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return "没有收到数据"
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case .decodingError(let error):
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return "数据解析错误: \(error.localizedDescription)"
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case .serverError(let message):
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return "服务器错误: \(message)"
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case .unauthorized:
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return "未授权，请重新登录"
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case .other(let error):
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return error.localizedDescription
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case .networkError(let error):
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return "网络请求错误: \(error.localizedDescription)"
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case .unknownError(let error):
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return "未知错误: \(error.localizedDescription)"
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}
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}
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}
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class NetworkService {
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static let shared = NetworkService()
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// 默认请求头
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private let defaultHeaders: [String: String] = [
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"Content-Type": "application/json",
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"Accept": "application/json"
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]
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private var isRefreshing = false
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private var requestsToRetry: [(URLRequest, (Result<Data, NetworkError>) -> Void, Int)] = []
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private init() {}
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// MARK: - 基础请求方法
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private func request<T: Decodable>(
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_ method: String,
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path: String,
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parameters: [String: Any]? = nil,
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headers: [String: String]? = nil,
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completion: @escaping (Result<T, NetworkError>) -> Void
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) {
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// 生成请求ID
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let requestId = RequestIdentifier.next()
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// 构建URL
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let fullURL = APIConfig.baseURL + path
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guard let url = URL(string: fullURL) else {
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print("❌ [Network][#\(requestId)][\(method) \(path)] 无效的URL")
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completion(.failure(.invalidURL))
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return
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}
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// 创建请求
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var request = URLRequest(url: url)
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request.httpMethod = method
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// 设置请求头 - 合并默认头、认证头和自定义头
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defaultHeaders.forEach { key, value in
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request.setValue(value, forHTTPHeaderField: key)
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}
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// 添加认证头
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APIConfig.authHeaders.forEach { key, value in
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request.setValue(value, forHTTPHeaderField: key)
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}
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// 添加自定义头（如果提供）
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headers?.forEach { key, value in
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request.setValue(value, forHTTPHeaderField: key)
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}
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// 设置请求体（如果是POST/PUT请求）
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if let parameters = parameters, (method == "POST" || method == "PUT") {
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do {
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request.httpBody = try JSONSerialization.data(withJSONObject: parameters)
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} catch {
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print("❌ [Network][#\(requestId)][\(method) \(path)] 参数序列化失败: \(error.localizedDescription)")
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completion(.failure(.other(error)))
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return
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}
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}
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// 打印请求信息
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print("""
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🌐 [Network][#\(requestId)][\(method) \(path)] 开始请求
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🔗 URL: \(url.absoluteString)
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📤 Headers: \(request.allHTTPHeaderFields ?? [:])
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📦 Body: \(request.httpBody.flatMap { String(data: $0, encoding: .utf8) } ?? "")
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""")
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// 创建任务
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let startTime = Date()
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let task = URLSession.shared.dataTask(with: request) { [weak self] data, response, error in
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let duration = String(format: "%.3fs", Date().timeIntervalSince(startTime))
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// 处理响应
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self?.handleResponse(
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requestId: requestId,
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method: method,
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path: path,
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data: data,
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response: response,
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error: error,
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request: request,
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duration: duration,
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completion: { (result: Result<T, NetworkError>) in
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completion(result)
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}
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)
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}
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// 开始请求
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task.resume()
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}
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private func handleResponse<T: Decodable>(
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requestId: Int,
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method: String,
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path: String,
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data: Data?,
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response: URLResponse?,
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error: Error?,
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request: URLRequest,
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duration: String,
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completion: @escaping (Result<T, NetworkError>) -> Void
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) {
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// 打印响应信息
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if let httpResponse = response as? HTTPURLResponse {
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let statusCode = httpResponse.statusCode
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let statusMessage = HTTPURLResponse.localizedString(forStatusCode: statusCode)
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// 处理401未授权
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if statusCode == 401 {
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print("""
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🔑 [Network][#\(requestId)][\(method) \(path)] 检测到未授权，尝试刷新token...
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⏱️ 耗时: \(duration)
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""")
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// 将请求加入重试队列
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let dataResult = data.flatMap { Result<Data, NetworkError>.success($0) } ?? .failure(.noData)
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self.requestsToRetry.append((request, { result in
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switch result {
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case .success(let data):
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do {
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let decoder = JSONDecoder()
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let result = try decoder.decode(T.self, from: data)
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print("""
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✅ [Network][#\(requestId)][\(method) \(path)] 重试成功
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⏱️ 总耗时: \(duration) (包含token刷新时间)
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""")
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completion(.success(result))
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} catch let decodingError as DecodingError {
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print("""
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❌ [Network][#\(requestId)][\(method) \(path)] JSON解析失败
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🔍 错误: \(decodingError.localizedDescription)
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📦 原始数据: \(String(data: data, encoding: .utf8) ?? "")
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""")
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completion(.failure(.decodingError(decodingError)))
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} catch {
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print("""
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❌ [Network][#\(requestId)][\(method) \(path)] 未知错误
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🔍 错误: \(error.localizedDescription)
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""")
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completion(.failure(.unknownError(error)))
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}
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case .failure(let error):
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print("""
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❌ [Network][#\(requestId)][\(method) \(path)] 重试失败
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🔍 错误: \(error.localizedDescription)
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""")
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completion(.failure(error))
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}
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}, requestId))
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// 如果没有正在刷新的请求，则开始刷新token
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if !isRefreshing {
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refreshAndRetryRequests()
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}
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return
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}
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// 处理其他错误状态码
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if !(200...299).contains(statusCode) {
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let errorMessage = data.flatMap { String(data: $0, encoding: .utf8) } ?? ""
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print("""
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❌ [Network][#\(requestId)][\(method) \(path)] 请求失败
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📊 状态码: \(statusCode) (\(statusMessage))
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⏱️ 耗时: \(duration)
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🔍 错误响应: \(errorMessage)
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""")
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completion(.failure(.serverError("状态码: \(statusCode), 响应: \(errorMessage)")))
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return
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}
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// 成功响应
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print("""
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✅ [Network][#\(requestId)][\(method) \(path)] 请求成功
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📊 状态码: \(statusCode) (\(statusMessage))
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⏱️ 耗时: \(duration)
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""")
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}
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// 处理网络错误
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if let error = error {
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print("""
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❌ [Network][#\(requestId)][\(method) \(path)] 网络请求失败
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⏱️ 耗时: \(duration)
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🔍 错误: \(error.localizedDescription)
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""")
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completion(.failure(.networkError(error)))
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return
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}
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// 检查数据是否存在
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guard let data = data else {
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print("""
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❌ [Network][#\(requestId)][\(method) \(path)] 没有收到数据
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⏱️ 耗时: \(duration)
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""")
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completion(.failure(.noData))
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return
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}
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// 打印响应数据（调试用）
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if let responseString = String(data: data, encoding: .utf8) {
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print("""
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📥 [Network][#\(requestId)][\(method) \(path)] 响应数据:
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\(responseString.prefix(1000))\(responseString.count > 1000 ? "..." : "")
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""")
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}
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do {
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// 解析JSON数据
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let decoder = JSONDecoder()
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let result = try decoder.decode(T.self, from: data)
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completion(.success(result))
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} catch let decodingError as DecodingError {
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print("""
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❌ [Network][#\(requestId)][\(method) \(path)] JSON解析失败
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🔍 错误: \(decodingError.localizedDescription)
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📦 原始数据: \(String(data: data, encoding: .utf8) ?? "")
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""")
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completion(.failure(.decodingError(decodingError)))
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} catch {
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print("""
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❌ [Network][#\(requestId)][\(method) \(path)] 未知错误
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🔍 错误: \(error.localizedDescription)
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""")
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completion(.failure(.unknownError(error)))
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}
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}
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private func refreshAndRetryRequests() {
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guard !isRefreshing else { return }
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isRefreshing = true
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let refreshStartTime = Date()
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print("🔄 [Network] 开始刷新Token...")
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TokenManager.shared.refreshToken { [weak self] success, _ in
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guard let self = self else { return }
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let refreshDuration = String(format: "%.3fs", Date().timeIntervalSince(refreshStartTime))
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if success {
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print("""
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✅ [Network] Token刷新成功
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⏱️ 耗时: \(refreshDuration)
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🔄 准备重试\(self.requestsToRetry.count)个请求...
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""")
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// 重试所有待处理的请求
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let requestsToRetry = self.requestsToRetry
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self.requestsToRetry.removeAll()
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for (request, completion, requestId) in requestsToRetry {
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var newRequest = request
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if let token = KeychainHelper.getAccessToken() {
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newRequest.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
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}
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let task = URLSession.shared.dataTask(with: newRequest) { data, response, error in
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if let data = data {
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completion(.success(data))
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} else if let error = error {
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completion(.failure(.networkError(error)))
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} else {
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completion(.failure(.noData))
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}
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}
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task.resume()
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}
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} else {
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print("""
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❌ [Network] Token刷新失败
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⏱️ 耗时: \(refreshDuration)
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🚪 清除登录状态...
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""")
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// 清除token并通知需要重新登录
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TokenManager.shared.clearTokens()
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DispatchQueue.main.async {
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NotificationCenter.default.post(name: .userDidLogoutNotification, object: nil)
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}
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// 所有待处理的请求都返回未授权错误
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self.requestsToRetry.forEach { _, completion, _ in
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completion(.failure(.unauthorized))
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}
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self.requestsToRetry.removeAll()
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}
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self.isRefreshing = false
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}
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}
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// MARK: - 公共方法
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/// GET 请求
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func get<T: Decodable>(
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path: String,
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parameters: [String: Any]? = nil,
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headers: [String: String]? = nil,
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completion: @escaping (Result<T, NetworkError>) -> Void
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) {
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request("GET", path: path, parameters: parameters, headers: headers, completion: completion)
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}
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/// POST 请求
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func post<T: Decodable>(
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path: String,
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parameters: [String: Any]? = nil,
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headers: [String: String]? = nil,
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completion: @escaping (Result<T, NetworkError>) -> Void
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) {
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request("POST", path: path, parameters: parameters, headers: headers, completion: completion)
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}
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/// POST 请求（带Token）
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func postWithToken<T: Decodable>(
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path: String,
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parameters: [String: Any]? = nil,
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headers: [String: String]? = nil,
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completion: @escaping (Result<T, NetworkError>) -> Void
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) {
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var headers = headers ?? [:]
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if let token = KeychainHelper.getAccessToken() {
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headers["Authorization"] = "Bearer \(token)"
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}
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post(path: path, parameters: parameters, headers: headers, completion: completion)
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}
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/// DELETE 请求
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func delete<T: Decodable>(
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path: String,
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parameters: [String: Any]? = nil,
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headers: [String: String]? = nil,
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completion: @escaping (Result<T, NetworkError>) -> Void
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) {
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request("DELETE", path: path, parameters: parameters, headers: headers, completion: completion)
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}
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/// PUT 请求
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func put<T: Decodable>(
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path: String,
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parameters: [String: Any]? = nil,
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headers: [String: String]? = nil,
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completion: @escaping (Result<T, NetworkError>) -> Void
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) {
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request("PUT", path: path, parameters: parameters, headers: headers, completion: completion)
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}
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}
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