Question

I’m trying to validate a feed, using the web service that is in this question.

But browser does not allow me to send a ajax GET request to another server. And there is a one second restriction per each request in that web service, so I can’t mirror requests from my server.

This is my current jQuery code:

var reqUrl = "http://validator.w3.org/feed/check.cgi?url=" + encodeURIComponent(theUrl);
$.get(reqUrl, function(data) {
    // do something
});

Isn’t there any other way?

Answer 1

Ajax calls are not valid across different domains unless you use JSONP. JQuery-ajax-cross-domain is a similar question that may give you some insight. Also as noted by Luis in the comments, JSONP has to also be implemented on the domain that you are getting the data from.

Here is an example for jquery ajax(), but you may want to look into $.getJSON():

$.ajax({
    url: 'http://yourUrl?callback=?',
    dataType: 'jsonp',
    success: processJSON
});

Another option is CORS (Cross Origin Resource Sharing), however, this requires that the other server to enable CORS which most likely will not happen in this case.