ios - 并行http请求

Question

我需要将image 发送到服务器并等待服务器响应。图片很大，需要很长时间，所以我想将其并行化。我尝试了很多方法，但出现错误:

2019-12-20 15:01:49.148156+0100 Catch Photo[644:138111] Task <81527D6C-279F-4644-9F5A-DE00665BCBF2>.<18> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_kCFStreamErrorCodeKey=-2102, NSUnderlyingError=0x282184240 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 "(null)" UserInfo={_kCFStreamErrorCodeKey=-2102, _kCFStreamErrorDomainKey=4}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalUploadTask <81527D6C-279F-4644-9F5A-DE00665BCBF2>.<18>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalUploadTask <81527D6C-279F-4644-9F5A-DE00665BCBF2>.<18>" ), NSLocalizedDescription=The request timed out.

exteriorQueinAsinc.async {
   let queue = OperationQueue()
      for i in 0..<images.count
      {
          queue.addOperation {
          self.sendImageToServer(image: images[i], imageName: imageNames[i])
       }
   }
   queue.waitUntilAllOperationsAreFinished()
}

发送图片函数:

 func SendImageToServer(image:UIImage,imageName:String){
       let userId = AppSettings.user.id
        let token = AppSettings.token

        let url = "http://intaiapi.catch-system.com/vehicle_image"
        guard let imageData = image.jpegData(compressionQuality: 1.0) else { return }

        let parametar : [String:String] = [
                        "apiUrl":apiUrl,
                        "userId":userId!,
                        "userToken":token,
                        ]

       let manager = Alamofire.SessionManager.default
       manager.session.configuration.timeoutIntervalForRequest = 1200
       manager.upload(multipartFormData: { multipleData in
           for (key, value) in parametar {
               multipleData.append(value.data(using: String.Encoding.utf8)!, withName: key)
           }
       multipleData.append(
           imageData, withName: "image", fileName: "image.jpeg", mimeType: "image/jpeg")}, to: url) {
               (result) in
        switch result {

                     case .success(let upload, _, _):
                         upload.responseJSON { response in
                             if let image = UIImage(data: response.data!) {
                                 handler(.success(image))
                             } else {
                                 NotificationCenter.default.post(name: .ClearImageErrorNotification, object: nil)
                                 handler(.failure(.NotValidStatusCode(response.debugDescription)))
                             }
                     }
                     case .failure(let encodingError):
                         NotificationCenter.default.post(name: .ClearImageErrorNotification, object: nil)
                         handler(.failure(.NotValidStatusCode(encodingError.localizedDescription)))
                         print(encodingError)
                     }
       }
}

我尝试过的方法之一就是这个。我使用 Alamofire。

Answer 1

您可以增加等待请求完成的超时时间。设置

manager.session.configuration.timeoutIntervalForResource = 1200

或任何其他接近

的值

manager.session.configuration.timeoutIntervalForRequest = 1200