Question

我需要同时上传数百个请求才能上传文件。我正在使用AFNetworking，我只是从for循环中调用一个方法。但它给了我一些文件中的内部服务器错误。服务器端没有任何内容。此过程已从Web成功执行。

这是我的代码：

for (UIImage *img in imgages) {
        [self uploadImage:img];
      }


-(void) uploadImage:(UIImage *)image
{



    //    NSDictionary *someData=@{x:x }
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:someData
                                                       options:0

                                                         error:nil];

        NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:[BASE_URL stringByAppendingString:@"xyz.com"] parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        [formData appendPartWithFormData:jsonData name:@"abc"];

        if (imgData) {

            [formData appendPartWithFormData:imgData name:@"file"];

        }
    } error:nil];

    AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

     NSURLSessionUploadTask *uploadTask;

   manager.responseSerializer = [AFHTTPResponseSerializer serializer];

    uploadTask = [manager
                  uploadTaskWithStreamedRequest:request
                  progress:nil completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {

                  }];

    [uploadTask resume];

}

实现上述功能的最佳方式是什么？

Answer 1

尝试使用以下代码同时上传文件。

 -(id)init {
self = [super init];
if(self) {
    backgroundQueue = dispatch_queue_create("com.bgqueue", NULL);

    dispatch_once(&onceToken, ^{

        NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:@"com.Demo-Upload"];
        sessionConfiguration.HTTPMaximumConnectionsPerHost = 10;
         manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:sessionConfiguration];
    });
}
return self;
}

- (void)processFiles{
    for (UIImage *img in imgages) {
         dispatch_async(backgroundQueue, ^(void) {
             [self uploadImage:img];
         });
    }
}


-(void) uploadImage:(UIImage *)image
{
     // Prepare a temporary file to store the multipart request prior to sending it to the server due to an alleged
     // bug in NSURLSessionTask.
     NSString* tmpFilename = [NSString stringWithFormat:@"%f", [NSDate timeIntervalSinceReferenceDate]];
     NSURL* tmpFileUrl = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent:tmpFilename]];

     // Create a multipart form request.
     NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:[BASE_URL stringByAppendingString:@"xyz.com"] parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    [formData appendPartWithFormData:jsonData name:@"abc"];

       if (imgData) {
          [formData appendPartWithFormData:imgData name:@"file"];
       }
     } error:nil];

     // Dump multipart request into the temporary file.
    [[AFHTTPRequestSerializer serializer] requestWithMultipartFormRequest:request
                                          writingStreamContentsToFile:tmpFileUrl
                                                    completionHandler:^(NSError *error)
     {
          // Once the multipart form is serialized into a temporary file, we can initialize
          // the actual HTTP request using session manager.


          // Here note that we are submitting the initial multipart request. We are, however,
          // forcing the body stream to be read from the temporary file.

           self.uploadTask = [manager uploadTaskWithRequest:request
                                fromFile:tmpFileUrl
                                progress:^(NSProgress * _Nonnull uploadProgress)
                                            {
                                                NSLog(@"Progress… %f", uploadProgress.fractionCompleted);
                                            }
                                completionHandler:^(NSURLResponse *response, id responseObject, NSError *error)
                                           {
                                               // Cleanup: remove temporary file.
                                               [[NSFileManager defaultManager] removeItemAtURL:tmpFileUrl error:nil];

                                               // Do something with the result.
                                               if (error)
                                               {
                                                 //Print Error
                                               } else
                                               {
                                                   //Print responseObject
                                               }
                                           }];
         // Start the file upload.
         [self.uploadTask resume];
    }];
}

当应用程序进入后台时，上面的功能将继续上传图像。因此，这不会给您内部服务器错误或任何超时错误。

希望它会对你有所帮助。如果您对上述代码有任何疑问，请随时提出。

使用AFNetworking同时发出数百个请求

1 个答案: