AJAX https POST requests using jquery fail in Firefox

Question

I have a simple list of records in an HTML table with a delete link for each row. The delete link shoots off an AJAX post request to a fixed url that looks like: "/delete/record/5"

The AJAX request is created using jquery's .ajax() call with a POST message when running on a server that uses https. This call fails in Firefox 3 on OSX/Windows architectures. It works on all other browsers I've tested (OSX/Windows: Chrome, Safari, IE7.)

The requests are coming from an https site and going to the same https site. But I think somewhere during the process the original request starts off as http and there is a redirect attempt on our server to send it from http->https and Firefox rejects that redirect as some type of forgery.

Has anyone had experience doing .ajax() JQuery calls on an https site with Firefox? I notice something odd where if the request has "?var=xxx" arguments in the URL, the request seems to work more often then if it does not have those variables.

Answer 1

Sounds like you're getting an HTTP 411 error.. This error can happen if you're sending a POST request without any data.

To fix this, add an empty object ({}) to the data property to your requests:

$.ajax({ 
    url: url, 
    type: 'POST', 
    data: {}, // <- set empty data 
    success: function(data, textStatus) { 
        // do something 
    } 
});