uploadTaskWithStreamedRequest中的AFNetworking错误 [英] AFNetworking error in uploadTaskWithStreamedRequest

问题描述

错误

Terminating app due to uncaught exception 'NSGenericException', reason: 'Upload tasks in background sessions must be from a file'

当我尝试

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];

配置为 NSURLSession 工作正常，但是当我使用波纹管配置时，应用程序崩溃并给我错误。

configuration for NSURLSession work fine but when i use bellow configuration then application crash and give me error.

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration backgroundSessionConfiguration:kBackgroundSessionIdentifier];

推荐答案

您应使用 uploadTaskWithRequest： fromFile：。这里的问题是，您必须将分段请求的内容写入临时文件，然后上传该文件。

You should use uploadTaskWithRequest:fromFile: only. The catch here is that you have to write your multipart request contents to a temp file and then upload that file.

您应使用 AFHTTPRequestSerializer：requestWithMultipartFormRequest ：writingStreamContentsToFile：completionHandler：。
请参见 https://github.com/AFNetworking/AFNetworking/issues/1874-兰辛的答案

You should use AFHTTPRequestSerializer:requestWithMultipartFormRequest:writingStreamContentsToFile:completionHandler:. Refer https://github.com/AFNetworking/AFNetworking/issues/1874 - Lansing's answer

以下是对我有用的示例代码：

Here is the sample code that worked for me:

NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:TEMP_DATA_FILE];
[data writeToFile:filePath atomically:YES];
NSURL *filepathURL = [NSURL fileURLWithPath:filePath];

NSString *tempFile = [NSTemporaryDirectory() stringByAppendingPathComponent:TEMP_MULTI_PART_REQUEST_FILE];
NSURL *filePathtemp = [NSURL fileURLWithPath:tempFile];


AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
NSError *error = nil;

NSMutableURLRequest *request =
[serializer multipartFormRequestWithMethod:@"POST" URLString:AppendStrings(HOST_FOR_SERVICE_ACCESS, SERVICE_FOR_MULTIPART_UPLOAD)
                                    parameters:parameters
                     constructingBodyWithBlock:^(id<AFMultipartFormData> formData)
     {[formData appendPartWithFileURL:filepathURL name:@"data" error:nil];}
                                         error:&error ];

__block NSProgress *progress = nil;
[serializer requestWithMultipartFormRequest:request writingStreamContentsToFile:filePathtemp completionHandler:^(NSError *error) {

NSURLSessionUploadTask *uploadTask = [self.sessionManager uploadTaskWithRequest:request fromFile:filePathtemp progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {}];
[uploadTask resume];

记住以后要清理临时文件。

Remember to clean up your temp files afterwards.

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