JSON error in AFNetworking - ios

Question

I'm trying to use the AFNetworking library to send a post request to an URL like this:
https://m.com/api/2.0/basic/sim_balance.json
That expects a username and password in the URL that are my parameters (as NSDictionary).
The URL gives a JSON back like this:
{
"valid_until": "2011-05-05 22:13:28",
"sms": 0,
"sms_super_on_net_max": 300,
"voice_super_on_net": 0,
"credits": "0.00",
"bundles": [],
"is_expired": true,
"sms_super_on_net": 0,
"voice_super_on_net_max": 3600,
"data": 0
}
This is my request function:
+(void) request:(NSString *)endpoint : (NSDictionary *) parameters
{
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager POST:endpoint parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"JSON: %#", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
}
I always get this as error:
Error: Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x904b7e0 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}
I validated the JSON and the server is sending valid JSON.
Can someone help me out on this?

Answer 1

To get AFHTTPRequestOperationManager to serialize the request body as JSON, you need to set the value of its requestSerializer:
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.requestSerializer = [AFJSONRequestSerializer serializer];
[manager POST:....];
If you do not set the requestSerializer property, then the manager object will use x-www-form-urlencoded serialization by default.
Note however that AFHTTPRequestOperationManager will handle JSON in the response body by default.

Answer 2

I found the solution thanks to ester. Also you need to set the basic auth headers right.
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager.requestSerializer setAuthorizationHeaderFieldWithUsername:#"Tom" password:#"test"];
[manager GET:endpoint parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"JSON: %#", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Response data: %#",operation.responseData);
NSLog(#"Response String: %#",operation.responseString);
NSLog(#"Error: %#", error);
}];
}