Error Domain=NSCocoaErrorDomain Code=3840 in iOS swift?

Question

All was working fine before but now Getting error like

Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

My JSON parsing code is like

 func JSONParseArray(jsonString: String) -> [AnyObject] {
            if let data = jsonString.dataUsingEncoding(NSUTF8StringEncoding) {
                if let array = (try? NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions(rawValue: 0)))  as? [AnyObject] {
                    return array
                }
            }
            print(strings)
            return [AnyObject]()
        }

what can be issue? or what I am doing wrong?

My JSOn String value is

http://test.domain.in/transfer/jsp/wsCall.jsp?dataFormat=JSON&requestData={"requestId":"1447417335364","requestType":"LOGIN","channelId":"MOBILE","clientId":"RG","groupId”:”Test”,”loginId":"[email protected]","password":"cFzc3dvcmRAMA==","noofAttempts":"1","ipAddress":"8ADCD445-A4F6-49EA-A344-35313A0AD","key":"MzQM3OTA4NDgxMjY4bWlsbGVy"}

Answer 1

request.setValue("text/json", forKey: "Content-Type")

Answer 2

It seems the first letter of your response is h, the second is t, the third is t, the fourth is p. That's not valid JSON.

BTW. Never, ever, pass a string to a method that is supposed to parse JSON. Someone along the line sent NSData to you. Pass that NSData on to the JSON parser unchanged. That avoids wasting memory, wasting time, wasting battery power, and having unnecessary bugs.

BTW. For a method that can fail it is incredibly bad style to return anything other than an optional. Especially since you actually return an empty array in case of errors, which cannot be distinguished from an input of [] which gets parsed correctly and returns an empty error. So you are losing all error checking.