Extend jQuery with functions for PUT and DELETE requests.

jquery.extra_http_methods.js

/*
 * Extend jQuery with functions for PUT and DELETE requests.
 * references: 
 *   http://homework.nwsnet.de/news/9132_put-and-delete-with-jquery
 *   http://stackoverflow.com/questions/4007605/using-http-put-to-send-json-with-jquery-and-rails-3
 */

(function($) {
  function _ajax_request(url, data, callback, type, method) {
    if ($.isFunction(data)) {
      callback = data;
      data = {};
    }
    return $.ajax({
      type: method,
      url: url,
      data: data,
      success: callback,
      dataType: type,
      beforeSend: function(xhr){
        xhr.setRequestHeader("X-Http-Method-Override", method.toLowerCase());
      }
    });
  }

  $.extend({
    "put": function(url, data, callback, type) {
      return _ajax_request(url, data, callback, type, 'PUT');
    },
    "delete": function(url, data, callback, type) {
      return _ajax_request(url, data, callback, type, 'DELETE');
    }
  })
})(jQuery);