JSONP in web apps

[sdfanq]

Hi,

Is there any way I could implement JSONP in my S40 web app ? I'm using an API that doesn't support cross domain requests.

Best regards,
Stefan

[jzferreira]

Hi sdfanq,

Yes, you can use. Do you have any problem to use JSONP in your web apps? Can you show the error?

[sdfanq]

Thank you for the support, I don't know what the problem was but it worked using jQuery.
Using synchronous xhr (and with no library) I was always getting empty messages in the console, and they were coming instantly as though I was making asynchronous calls ...

[jzferreira]

So, when you use your xhr request the callback is not fired? Can you show your code here?

[sdfanq]

It was something like this:

var xhr = new XMLHttpRequest();

xhr.onreadystatechange = function(){
	if(xhr.readyState == 4){
		loadingEvents = false;
		if(xhr.status == 200){
			console.log(xhr.responseText);
                       }
         }
}


var queryString = 'http://api.eventful.com/json/events/search' + '?app_key=' + eventful.app_key + '&date=' + eventful.date + '&location=' + latitude + ',' + longitude + '&within=' + eventful.within + '&page_size=' + eventful.page_size;
xhr.open('GET', queryString, true);
xhr.send(null);

[jzferreira]

Hi sdfanq,

Sorry, but I didn´t see jsonp in this request. It´s a simple json request. Which parameter is the callback function?

[jaymanklu]

Hi sdfanq,

Sorry, but I didn´t see jsonp in this request. It´s a simple json request. Which parameter is the callback function?

Hello jzferreria,

Here is the simple jsonp request with the callback

function jsonp() {
			var sc = document.createElement('script');
			sc.type = "text/javascript";
			var url = "http://answers.yahooapis.com/AnswersService/V1/questionSearch?query=maybelline&region=in&appid=dj0yJmk9aVE5cFRyb2VHeVFvJmQ9WVdrOVJWTTBVSE5PTlRRbWNHbzlPVE14TXpnMk5qWXkmcz1jb25zdW1lcnNlY3JldCZ4PTll&output=jsonp&callback=call_back";
			sc.src = url;
			console.log("reached");
	
		}

		function call_back(data) {
			console.log("called");
			console.log(data.all.questions[0]);
	}

when i see in the console, i can see the jsonp() method's reached, but not call_back's console output "called" am i doing something wrong here?

[jaymanklu]

Hello sdfanq,

can you share with you the jquery method you used?

would really appreciate the help

thanks