I have followed the exact same steps a mentioned in the GET data from server video but I receive response code as -1

init function of Helloworld.cpp : 

    network::HttpRequest *request = new network::HttpRequest();
    request->setUrl("http://www.sonarlearning.co.uk/extras/cocostutorial/get.php");
    request->setRequestType(network::HttpRequest::Type::GET);
    request->setResponseCallback(CC_CALLBACK_2(HelloWorld::onHttpRequestCompleted,this));
    network::HttpClient::getInstance()->send(request);
    request->release();
    return true;
}

void HelloWorld::onHttpRequestCompleted(network::HttpClient *sender, network::HttpResponse *response)
{
   
        if ( response->getResponseCode() == 200 )
        {
            printf( "Succeeded" );
            return;
        }
        else
        {
            printf("Failed");
        }
}