AFNetworking 2.0 - “unacceptable content-type: text/plain”

Question

I'm using AFNetworking 2.0 to read JSON from a service I'm building (on localhost for now) in Node. Pretty normal stuff.

Node is sending JSON like so:

res.setHeader('Content-Type','application/json');
res.end( JSON.stringify(...));

My iOS first-pass code is attempting to read that data like so:

typedef void(^NextBlock)();
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

manager.responseSerializer = [AFJSONResponseSerializer serializer];
[manager GET:self.newestTimestampURL.absoluteString
    parameters:nil
    success:^(AFHTTPRequestOperation *operation, id responseObject)
    {
        //NSDictionary *response =
        NSLog(@"got %@", responseObject );
    }
    failure:^(AFHTTPRequestOperation *operation, NSError *error)
    {
        NSLog(@"fail %@", error );
    }];

This is the error I'm getting:

Error Domain=AFNetworkingErrorDomain Code=-1016 "Request failed: unacceptable content-type: text/plain" UserInfo=0xb783e30 {NSErrorFailingURLKey=http://localhost:3000/api/v1/log/newest, AFNetworkingOperationFailingURLResponseErrorKey=<NSHTTPURLResponse: 0xb656a70> { URL: http://localhost:3000/api/v1/log/newest } { status code: 200, headers {
Connection = "keep-alive";
ContentType = "application/json";
Date = "Fri, 27 Dec 2013 20:58:50 GMT";
"Transfer-Encoding" = Identity;
} }, NSLocalizedDescription=Request failed: unacceptable content-type: text/plain}

I can curl (-i) the url http://localhost:3000/api/v1/log/newest and get the data I'm expecting, and it's application/json as expected. If I load that data in my web browser, I get JSON as expected per dev tools inspector.

But using AFNetworking, I get this mysterious "unacceptable content-type: text/plain" error. Any idea?

NOTE: I've never used AFNetworking before, so I'm probably using it incorrectly.

Answer 1

It seems that the server is sending "text/html", and this type is not supported by default. Add @"text/html" for "acceptableContentTypes"

manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];

Answer 2

manager.responseSerializer = [AFHTTPResponseSerializer serializer];

work for me.

Answer 3

Work for me.

manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/plain"];

Answer 4

I have followed the answer posted by @KIO but it did not work in my scenario.

After going with many answers i was able to find solution which worked for me.

AFHTTPRequestOperationManager *operation = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:url];
    operation.responseSerializer = [AFJSONResponseSerializer serializer];

AFJSONResponseSerializer *jsonResponseSerializer = [AFJSONResponseSerializer serializer];

NSMutableSet *jsonAcceptableContentTypes = [NSMutableSet setWithSet:jsonResponseSerializer.acceptableContentTypes];
[jsonAcceptableContentTypes addObject:@"text/plain"];
jsonResponseSerializer.acceptableContentTypes = jsonAcceptableContentTypes;
operation.responseSerializer = jsonResponseSerializer;

Answer 5

Just use:

SWIFT:

manager.responseSerializer.acceptableContentTypes = NSSet(object: "text/plain") as Set<NSObject>

OBJ-C:

manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/plain"];

Answer 6

NSURL *url = [NSURL URLWithString:RSS_WORLD_NEWS];
NSURLRequest *request = [NSURLRequest requestWithURL:url];

AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

// Make sure to set the responseSerializer correctly
operation.responseSerializer = [AFXMLParserResponseSerializer serializer];

operation.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"application/rss+xml"];

[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {

    NSXMLParser *XMLParser = (NSXMLParser *)responseObject;
    [XMLParser setShouldProcessNamespaces:YES];

     XMLParser.delegate = self;
     [XMLParser parse];

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {

    [MBProgressHUD hideHUDForView:self.view animated:YES];
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error Retrieving contents"
                                                        message:[error localizedDescription]
                                                       delegate:nil
                                              cancelButtonTitle:@"Ok"
                                              otherButtonTitles:nil];
    [alertView show];

}];

[operation start];

work for me

Answer 7

Updated Solution for Swift.

If you are using AFNetworking in Swift. Then this solution might help you. It will accept most of the content types.

let manager=AFHTTPRequestOperationManager()

            manager.responseSerializer = AFJSONResponseSerializer(readingOptions: NSJSONReadingOptions.AllowFragments) as AFJSONResponseSerializer

            manager.requestSerializer = AFJSONRequestSerializer() as AFJSONRequestSerializer

            manager.responseSerializer.acceptableContentTypes = NSSet(objects:"application/json", "text/html", "text/plain", "text/json", "text/javascript", "audio/wav") as Set<NSObject>