Does AFNetworking V 2 support non streaming multi part background upload tasks?
afnetworking-2, ios, multipartform-data, nsurlsessionuploadtask
Solution
There are some strict limitations with background NSURLSessions, regardless of AFNetworking. Upload tasks must use `[NSURLSession uploadTaskWithRequest:fromFile:]` I used Charles to monitor outgoing HTTP requests from this method and noticed it's using application/octet-stream. There is no way to get around this, at least nothing I've come across tinkering with it the past few days.
Problem
A project I am working on needs to upload a video. The post API call for uploading a video needs a multipart body. The code I tried to use is included at the bottom of the question. The code works perfectly for `[NSURLSessionConfiguration defaultSessionConfiguration]`. If I change the configuration to `[NSURLSessionConfiguration backgroundSessionConfiguration:@"Test Id"]`, the code crashes because background sessions only support file uploads. The error is: `*** Terminating app due to uncaught exception 'NSGenericException', reason: 'Upload tasks in background sessions must be from a file'` All of the multipart append methods that can be used in the following method use the AFMultipartBodyStream class. This class streams the upload so it can not be used in a background session since a stream is not a file. ``` NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) { NSError *error = nil; [formData appendPartWithFileURL:fileURL name:@"uploadFile" fileName:[fileURL lastPathComponent] mimeType:@"video/quicktime" error:&error]; } error:&error]; ``` Is it possible to have a NSURLSessionUploadTask with a multi part body that can run in a AFHTTPSessionManager that is using a backgroundSessionConfiguration? See sample code below: ``` NSURL *APIURL = [NSURL URLWithString:@"https://www.test.com/uploadVideo"]; NSError *error = nil; NSDictionary *params = @{ @"token" : @"d5bcf6c2-99ec-4de7-bd87-71918b633b3a", @"title" : @"Test_Video" }; NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) { NSError *error = nil; [formData appendPartWithFileURL:fileURL name:@"uploadFile" fileName:filePath mimeType:@"video/quicktime" error:&error]; } error:&error]; [request addValue:@"Basic 12345678901234567890" forHTTPHeaderField:@"Authorization"]; NSLog(@"%@", error); __weak __typeof(self)weakSelf = self; __block NSURLSessionUploadTask *task = [super uploadTaskWithStreamedRequest:request progress:progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) { [weakSelf handleCompletionForTask:task responseObject:responseObject error:error success:successBlock failure:failureBlock]; }]; [task setTaskDescription:endpoint.name]; [task resume]; ```