Jquery jsonp response error - Callback was not called

Question

I\'m trying to get some information from a different domain, the domain allows only jsonp call - others get rejected. How can I get the content instead of execution? Because I g

Answer 1

There are a few issues with your $.ajax call.

$.ajax({
    url: url + '?callback=?',
    // this is not needed for JSONP.  What this does, is force a local
    // AJAX call to accessed as if it were cross domain
    crossDomain: true,
    // JSONP can only be GET
    type: "POST",
    data: {key: key},
    // contentType is for the request body, it is incorrect here
    contentType: "application/json; charset=utf-8;",
    // This does not work with JSONP, nor should you be using it anyway.
    // It will lock up the browser
    async: false,
    dataType: 'jsonp',
    // This changes the parameter that jQuery will add to the URL
    jsonp: 'callback',
    // This overrides the callback value that jQuery will add to the URL
    // useful to help with caching
    // or if the URL has a hard-coded callback (you need to set jsonp: false)
    jsonpCallback: 'jsonpCallback',
    error: function(xhr, status, error) {
        console.log(status + '; ' + error);
    }
});

You should be calling your url like this:

$.ajax({
    url: url,
    data: {key: key},
    dataType: 'jsonp',
    success: function(response) {
        console.log('callback success');
    },
    error: function(xhr, status, error) {
        console.log(status + '; ' + error);
    }
});

JSONP is not JSON. JSONP is actually just adding a script tag to your . The response needs to be a JavaScript file containing a function call with the JSON data as a parameter.

JSONP is something the server needs to support. If the server doesn't respond correctly, you can't use JSONP.

Please read the docs: http://api.jquery.com/jquery.ajax/