NSDebugDescription = "JSON text did not start with array or object and option to allow fragments not set.";

Question

I am using AFJSONRequestOperation to request a server and parse the returned JSON response, but while parsing, I got this error:

NSDebugDescription = "JSON text did not start with array or object and option to allow fragments not set.";

I checked the API and it's returning JSON data:

header('Content-type: text/json');
$arr[] = array("Message" => "update succeeded");
echo '{"Result":'.json_encode($arr).'}';

Any idea how to fix that?

EDIT

I tried to call the API from browser and include the request in the url, and so I got a valid JSON response:

{"Result":[{"Message":"update succeeded"}]}

Answer 1

First thing, json_encode the entire object rather than breaking into it pieces.

Secondly, unless $arr contains multiple elements (not clear from example above), it should be initalized as thus:

$arr = array("Message" => "update succeeded");

I'm still not certain what else could be the issue here. You should echo out what your app is receiving and that should indicate the issue.

Answer 2

Please use acceptable content type. in your webservice that should be only plain text.

here is my swift code and fixed:

    let manager = AFHTTPRequestOperationManager()

    manager.requestSerializer=AFJSONRequestSerializer()
    manager.responseSerializer = AFHTTPResponseSerializer();

    manager.GET(

        baseURL + (webServiceType as String) + secureParam,
        parameters:[:],

        success:
        { (operation: AFHTTPRequestOperation!,
            responseObject: AnyObject!) in
            completion(obj: responseObject)
        },
        failure:
        { (operation: AFHTTPRequestOperation!,
            error: NSError!) in
            completion(obj: nil)
    })

Answer 3

Check you have added /api/ before your base url of API like

http:// someurl / yourBasrUrl /api/apiName

Answer 4

To make a valid json response, your code should look something like this:

$response = array(
    "Result" => array(
        "Message" => "update succeeded"
    )
)

echo json_encode($response);