AFNetworking getting HTML from rails - ruby-on-rails

Question

I am using AFNetworking to get JSON data from the server, but I am only getting back HTML and an error that says the following:
Expected content type {(
"text/json",
"application/json",
"text/javascript"
)}, got text/html, AFNetworkingOperationFailingURLResponseErrorKey=<NSHTTPURLResponse: 0x7592470>}
The code is as follows:
NSURL *url = [NSURL URLWithString:#"http://127.0.0.1:3000/games"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFJSONRequestOperation *operation;
operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request
success:^(NSURLRequest *req, NSHTTPURLResponse *response, id jsonObject){
NSLog(#"Response: %#", jsonObject);
}
failure:^(NSURLRequest *req, NSHTTPURLResponse *response, NSError *error, id jsonObject){
NSLog(#"Error: %#", error);
}];
[operation start];
I am using rails and the server sends back JSON when I access the page with curl. I want to force application/json to be requested, am I doing this wrong?

Answer 1

You probably need to tell the server what content type you want back.
Here's a common fix for this issue:
NSURL *url = [NSURL URLWithString:#"http://127.0.0.1:3000/games"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
If this doesn't work, you'll need to step through your server code to determine under what conditions it'll return JSON instead of HTML.