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Editorial Team
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Asked: 2026-06-15T03:29:55+00:00

I want to fetch some data from some url and print result in nslog.

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I want to fetch some data from some url and print result in nslog.
I am passing URl and want to fetch result in log only.
I have used this code :

   -(void)GETJSONDATA
{
   NSString*lu=@"tmp";
    NSString *requestString = [[NSString alloc]init];

    // [[NSUserDefaults standardUserDefaults] setValue:nil forKey:@"WRONGANSWER"];

    NSLog(@"request string:%@",requestString);
    NSData *requestData = [NSData dataWithBytes: [requestString UTF8String] length: [requestString length]];



    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: 
                                    [NSURL URLWithString: @"http://assessments.tlisc.org.au/webservices/questions/getbytaskpart.php?jsoncallback=?&token=1726204214321678|xTAieBBJoDaWmBsG1stxfq4zLO4&taskpartid=1"]];  
    NSString *postLength = [NSString stringWithFormat:@"%d", [requestData length]];

    [request setHTTPMethod: @"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

    [request setHTTPBody:requestData];

    NSError *respError = nil;
    NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse: nil error: &respError ];
    if (respError) 
    {
        //        NSString *msg = [NSString stringWithFormat:@"Connection failed! Error - %@ %@",
        //                         [respError localizedDescription],
        //                         [[respError userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]]; 
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Test"                                                  message:@"check your network connection" delegate:self cancelButtonTitle:@"OK" 
                                                  otherButtonTitles:nil];
        [alertView show];


    } 
    else
    {
        NSString *responseString = [[NSString alloc] initWithData:returnData encoding: NSUTF8StringEncoding];
        NSLog(@"Resp : %@",responseString);

        NSDictionary *results = [responseString JSONValue];
        NSLog(@"results=%@",results);




}
}

It is showing me this error :

 -JSONValue failed. Error trace is: (
    "Error Domain=org.brautaset.JSON.ErrorDomain Code=11 \"Unexpected end of string\" UserInfo=0x6a42be0 {NSLocalizedDescription=Unexpected end of string}"

Can anybody point me error?
In response string , it is showing null value.
I don’t know the actual error.

it is working fine in browser but when I parse it it is showing this error….Is there anyway through which I can modify the url and get result …i have checked my code with different url.and it is working proper..

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1 Answer

  1. Editorial Team

    I think I was using the same library as you’re using here, and for some unexplained reason it just failed on a particular google api, sometimes getting results but usually failing. There appeared to be nothing wrong with the code.

    In the end I went with the inbuilt NSJSONSerialization ( http://developer.apple.com/library/ios/#documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html ) object and it hasn’t failed since. I wasn’t even aware there was JSON support built in (from iOS5 apparently).

    I ran the two calls and processed them side by side, the external library continually failed. The internal methods worked fine.

    Since I’m a beginner and the docs (above) don’t really help me a lot, I used this tutorial http://www.raywenderlich.com/5492/working-with-json-in-ios-5 to get my head around it

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