How to upload binary data using AFNetworking 2.0

Question

I was looking for a method to execute this

curl -u username:password -H "Content-Type: application/binary" \
   --data-binary @file.dat -X POST \
   "https://helpdesk.zendesk.com/api/v2/uploads.json?filename=myfile.dat&token={optional_token}"

I tried using this

[afnetworkmanager POST:url parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

        [formData appendPartWithFileData:attachment.attachmentData name:@"image" fileName:attachment.fileName mimeType:attachment.mimeType];

    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
       // TODO:

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
       // TODO:
    }];

But it did not help. Currently I am getting an error saying

{
>     "Cache-Control" = "max-age=0, private, must-revalidate";
>     Connection = "keep-alive";
>     "Content-Length" = 345;
>     Server = "nginx/1.4.2";
>     Status = "201 Created";
>     "X-Content-Type-Options" = nosniff;
>     "X-Runtime" = "1.471856";
>     "X-UA-Compatible" = "IE=Edge,chrome=1";
>     "X-Zendesk-API-Version" = v2;
>     "X-Zendesk-API-Warn" = "Removed restricted keys [\"image\"] from parameters according to whitelist"; } },

> NSLocalizedDescription=Request failed: unacceptable content-type:
> text/plain}

I dont understand where I am wrong.

Answer 1

I eventually got this to work by using the AFURLSessionManager. Here is the complete code:

NSString *uploadAttachmentURL = @"https://mydomain.zendesk.com/api/v2/uploads.json?filename=screenshot.jpeg";

        NSData *imageData = UIImageJPEGRepresentation(image, 1.0);

        NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
        _afHTTPSessionManager = [[AFHTTPSessionManager alloc] initWithSessionConfiguration:configuration];

        // hack to allow 'text/plain' content-type to work
        NSMutableSet *contentTypes = [NSMutableSet setWithSet:_AFOpManager.responseSerializer.acceptableContentTypes];
        [contentTypes addObject:@"text/plain"];
        _afHTTPSessionManager.responseSerializer.acceptableContentTypes = contentTypes;

        [_afHTTPSessionManager.requestSerializer setAuthorizationHeaderFieldWithUsername:@"[USERNAME]" password:@"[PASSWORD]"];



        [_afHTTPSessionManager POST:uploadAttachmentURL parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
            [formData appendPartWithFileData:imageData name:@"screenshot" fileName:@"photo.jpg" mimeType:@"image/jpeg"];
        } success:^(NSURLSessionDataTask *task, id responseObject) {
            DDLogError(@"screenshot operation success!  %@", responseObject);
        } failure:^(NSURLSessionDataTask *task, NSError *error) {
            DDLogError(@"Operation Error: %@", error);
        }];