jquery.xwindow_name.js

/**
 * windowName transport plugin for jQuery
 *
 * Thanks to Kris Zyp <http://www.sitepen.com/blog/2008/07/22/windowname-transport/>
 * for the original idea and some code
 *
 * Licensed under GPLv3: http://www.gnu.org/licenses/gpl-3.0.txt
 * @author Marko Mrdjenovic <[email protected]>
 * 
 * @author Austin Putman <austin hat radicaldesigns dhot org>
 * This version has been extended to work on Firefox 3 with jQuery > 1.2.6
 * you will need to patch your version of jquery 1.2.6 to use this script
 * the patch can be found here: http://gist.github.com/14809
 * UNTESTED with all other browsers, may or may not expose you to as-yet-undiscovered
 * security exploits, contents may explode under pressure
 * 
**/
(function () {
	var $ = window.jQuery,
		_ajax = $.ajax,
		frameCounter = 0;
	$.extend({
		ajax: function (s) {
			var remote = /^(?:\w+:)?\/\/([^\/?#]+)/,
				localdom = remote.exec(s.url);
			if ( localdom && localdom[1] !== location.host) { 
                // when targetting a remote location use window.name transport
				s.xhr = function () {
					var url = '',
						frameName = '',
						frame = '',
						defaultName = 'jQuery.windowName.transport.frame',
						u = null;
					function cleanup() {
						try {
							delete window[frameName + '.callback'];
						} catch (er) {
							window[frameName + '.callback'] = function () {};
						}
						setTimeout(function () {
							$(frame).remove();
						}, 100);
					}
					function setData() {
						try {
							var data = frame.contentWindow.name;
							if (typeof data === 'string') {
								if (data === defaultName) {
									u.status = 501;
									u.statusText = 'Not Implemented';
								} else {
									u.status = 200;
									u.statusText = 'OK';
									u.responseText = data;
								}
                                // all data received
								u.readyState = 4; // we are done now
								u.onreadystatechange();
								cleanup();
							}
						} catch (er) {}
					}
					u = {
						abort: function () {
							cleanup();
						},
						getAllResponseHeaders: function () {
							return '';
						},
						getResponseHeader: function (key) {
							return '';
						},
						open: function (m, u) {
							url = u;
							this.readyState = 1;
							this.onreadystatechange();
						},
						send: function (data) {
							// prepare frame
							frameCounter += 1;
							frameName = "jQuery.ajax.windowName." + ('' + Math.random()).substr(2, 8);
							frame = document.createElement($.browser.msie? '<iframe name="' + frameName + '" onload="'+ frameName + '.callback()">' : 'iframe');
							frame.style.display = 'none';
							window[frameName + '.callback'] = frame.onload = function (interval) {
								var local = window.location.href.substr(0, window.location.href.indexOf('/', 8)) + '/robots.txt';
								function is_local() {
									var c = false;
									try {
										c = !!frame.contentWindow.location.href;
										// try to get location - if we can we're still local and have to wait some more...
									} catch (er) {
										// if we're at foreign location we're sure we can proceed
									}
									return c;
								}
								try {
									if (frame.contentWindow.location.href === 'about:blank') {
										return;
									}
								} catch (er) {}
								if (u.readyState === 3 && is_local()) {
                                    //redirect completed, data should be ready
									setData();
								}
								if (u.readyState === 2 && !is_local()) {
                                    //waiting for data
									u.readyState = 3;
									u.onreadystatechange();
                                    frame.contentWindow.location = local;
								}
							};
							setTimeout(function () { // stop after 2 mins
								cleanup();
							}, 120000);
							frame.name = frameName;
							frame.id = frameName;
							$('body')[0].appendChild(frame);
                            if( s.type.match(/GET/i)) {
                              if(s.data && s.data.length) {
                                s.url += ( s.url.indexOf("?") == -1 ? "?" : "&" ) + s.data;
                              }
                              frame.src = s.url;
                              console.log( s.url );
                              if( frame.contentWindow ) {
                                frame.contentWindow.location.replace(s.url);
                              }
                              this.readyState = 2;
                              this.onreadystatechange();
                            } else if( s.type.match(/POST/i)) {
                              // prepare form
                              var form = document.createElement('form');
                              function queryToObject(q) {
                                  var r = {},
                                      d = decodeURIComponent,
                                      dd = function( value ) { return value.replace(/\+/g, "%20" ) };
                                  $.each(q.split("&"), function (k, v) {
                                      if (v.length) {
                                          var parts = v.split('='),
                                              n = d(dd(parts.shift())),
                                              curr = r[n];
                                          v = d(dd(parts.join('=')));
                                          if (typeof curr === 'undefined') {
                                              r[n] = v;
                                          } else {
                                              if (curr.constructor === Array) {
                                                  r[n].push(v);
                                              } else {
                                                  r[n] = [curr].concat(v);
                                              }
                                          }
                                      }
                                  });
                                  return r;
                              }
                              document.getElementsByTagName('body')[0].appendChild(form);
                              $.each(queryToObject(data), function (k, v) {
                                  function setVal(k, v) {
                                      var input = document.createElement("input");
                                      input.type = 'hidden';
                                      input.name = k;
                                      input.value = v;
                                      form.appendChild(input);
                                  }
                                  if (v.constuctor === Array) {
                                      $.each(v, function (i, v) {
                                          setVal(k, v);
                                      });
                                  } else {
                                      setVal(k, v);
                                  }
                              });
                              form.method = 'POST';
                              form.action = url;
                              form.target = frameName;
                              frame.contentWindow.location = 'about:blank'; // opera likes this
                              form.submit();
                              //request sent
                              this.readyState = 2;
                              this.onreadystatechange();
                              form.parentNode.removeChild(form);
                            }
							if (frame.contentWindow) {
								frame.contentWindow.name = defaultName;
							}
						},
						setRequestHeader: function (key, value) {
						},
						onreadystatechange: function () {},
						readyState: 0,
						responseText: '',
						responseXML: null,
						status: null,
						statusText: null
					};
					return u;
				};
            }
            return _ajax( s );
        }
    });
})();