Upload an image with AFNetworking 2.0

Question

I can\'t understand why this is so hard. All the tutorials and articles online seem to be talking about the 1.0 api, which is pretty useless.

I\'ve tried a few diffe

Answer 1

For a properly formed "multipart/form-data" body, you need to use use the body construction block while creating the request. Otherwise the upload task is using the raw data as the body. For example, in your AFHTTPSessionManager subclass:

NSString *urlString = [[NSURL URLWithString:kPhotoUploadPath relativeToURL:self.baseURL] absoluteString];
NSMutableURLRequest *request = [self.requestSerializer multipartFormRequestWithMethod:@"POST" URLString:urlString parameters:params constructingBodyWithBlock:^(id <AFMultipartFormData> formData) {
    [formData appendPartWithFileData:photo.data name:@"photo" fileName:@"photo.jpg" mimeType:@"image/jpeg"];
}];

NSURLSessionUploadTask *task = [self uploadTaskWithStreamedRequest:request progress:progress completionHandler:^(NSURLResponse * __unused response, id responseObject, NSError *error) {
    if (error) {
        if (failure) failure(error);
    } else {
        if (success) success(responseObject);
    }
}];
[task resume];

Or, if you don't need to track upload progress, you can simply use:

[self POST:kPhotoUploadPath parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    [formData appendPartWithFileData:photo.data name:@"photo" fileName:@"photo.jpg" mimeType:@"image/jpeg"];
} success:^(NSURLSessionDataTask *task, id responseObject) {
    if (success) success(responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
    if (failure) failure(error);
}];

Answer 2

What Ray Lillywhite describes works perfectly fine (I would've made a comment on his post, but my reputation is too low).

1. Get the correct version of AFNetworking, containing this fix for updating progress when using multipart requests. At the moment of writing, that version is HEAD.
2. Create a NSMutableURLRequest with the help of multipartFormRequestWithMethod:URLString:parameters:constructingBodyWithBlock:error:.
   • Build your form data with the help of one of the appendPartWith... methods.
3. Get a (upload) data task by calling the right uploadTaskWith... method. You NEED to use uploadTaskWithStreamedRequest:progress:completionHandler: if you want to use the NSProgress input parameter.