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https://github.com/ACSPRI/queXS
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Import from DCARF SVN
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azammitdcarf
240
include/pear/data/HTML_AJAX/js/IframeXHR.js
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240
include/pear/data/HTML_AJAX/js/IframeXHR.js
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/**
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* XMLHttpRequest Iframe fallback
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*
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* http://lxr.mozilla.org/seamonkey/source/extensions/xmlextras/tests/ - should work with these
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*
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* @category HTML
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* @package AJAX
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* @author Elizabeth Smith <auroraeosrose@gmail.com>
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* @copyright 2005 Elizabeth Smith
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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*/
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HTML_AJAX_IframeXHR_instances = new Object();
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function HTML_AJAX_IframeXHR()
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{
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this._id = 'HAXHR_iframe_' + new Date().getTime();
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HTML_AJAX_IframeXHR_instances[this._id] = this;
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}
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HTML_AJAX_IframeXHR.prototype = {
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// Data not sent with text/xml Content-Type will only be available via the responseText property
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// properties available in safari/mozilla/IE xmlhttprequest object
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onreadystatechange: null, // Event handler for an event that fires at every state change
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readyState: 0, // Object status integer: 0 = uninitialized 1 = loading 2 = loaded 3 = interactive 4 = complete
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responseText: '', // String version of data returned from server process
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responseXML: null, // DOM-compatible document object of data returned from server process
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status: 0, // Numeric code returned by server, such as 404 for "Not Found" or 200 for "OK"
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statusText: '', // String message accompanying the status code
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iframe: true, // flag for iframe
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//these are private properties used internally to keep track of stuff
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_id: null, // iframe id, unique to object(hopefully)
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_url: null, // url sent by open
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_method: null, // get or post
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_async: null, // sync or async sent by open
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_headers: new Object(), //request headers to send, actually sent as form vars
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_response: new Object(), //response headers received
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_phpclass: null, //class to send
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_phpmethod: null, //method to send
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_history: null, // opera has to have history munging
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// Stops the current request
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abort: function()
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{
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var iframe = document.getElementById(this._id);
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if (iframe) {
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document.body.removeChild(iframe);
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}
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if (this._timeout) {
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window.clearTimeout(this._timeout);
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}
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this.readyState = 1;
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if (typeof(this.onreadystatechange) == "function") {
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this.onreadystatechange();
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}
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},
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// This will send all headers in this._response and will include lastModified and contentType if not already set
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getAllResponseHeaders: function()
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{
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var string = '';
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for (i in this._response) {
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string += i + ' : ' + this._response[i] + "\n";
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}
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return string;
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},
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// This will use lastModified and contentType if they're not set
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getResponseHeader: function(header)
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{
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return (this._response[header] ? this._response[header] : null);
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},
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// Assigns a label/value pair to the header to be sent with a request
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setRequestHeader: function(label, value) {
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this._headers[label] = value;
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return; },
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// Assigns destination URL, method, and other optional attributes of a pending request
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open: function(method, url, async, username, password)
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{
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if (!document.body) {
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throw('CANNOT_OPEN_SEND_IN_DOCUMENT_HEAD');
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}
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//exceptions for not enough arguments
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if (!method || !url) {
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throw('NOT_ENOUGH_ARGUMENTS:METHOD_URL_REQUIRED');
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}
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//get and post are only methods accepted
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this._method = (method.toUpperCase() == 'POST' ? 'POST' : 'GET');
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this._decodeUrl(url);
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this._async = async;
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if(!this._async && document.readyState && !window.opera) {
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throw('IE_DOES_NOT_SUPPORT_SYNC_WITH_IFRAMEXHR');
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}
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//set status to loading and call onreadystatechange
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this.readyState = 1;
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if(typeof(this.onreadystatechange) == "function") {
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this.onreadystatechange();
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}
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},
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// Transmits the request, optionally with postable string or DOM object data
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send: function(content)
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{
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//attempt opera history munging
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if (window.opera) {
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this._history = window.history.length;
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}
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//create a "form" for the contents of the iframe
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var form = '<html><body><form method="'
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+ (this._url.indexOf('px=') < 0 ? this._method : 'post')
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+ '" action="' + this._url + '">';
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//tell iframe unwrapper this IS an iframe
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form += '<input name="Iframe_XHR" value="1" />';
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//class and method
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if (this._phpclass != null) {
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form += '<input name="Iframe_XHR_class" value="' + this._phpclass + '" />';
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}
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if (this._phpmethod != null) {
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form += '<input name="Iframe_XHR_method" value="' + this._phpmethod + '" />';
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}
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// fake headers
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for (label in this._headers) {
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form += '<textarea name="Iframe_XHR_headers[]">' + label +':'+ this._headers[label] + '</textarea>';
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}
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// add id
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form += '<textarea name="Iframe_XHR_id">' + this._id + '</textarea>';
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if (content != null && content.length > 0) {
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form += '<textarea name="Iframe_XHR_data">' + content + '</textarea>';
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}
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form += '<input name="Iframe_XHR_HTTP_method" value="' + this._method + '" />';
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form += '<s'+'cript>document.forms[0].submit();</s'+'cript></form></body></html>';
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form = "javascript:document.write('" + form.replace(/\'/g,"\\'") + "');void(0);";
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this.readyState = 2;
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if (typeof(this.onreadystatechange) == "function") {
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this.onreadystatechange();
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}
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// try to create an iframe with createElement and append node
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try {
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var iframe = document.createElement('iframe');
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iframe.id = this._id;
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// display: none will fail on some browsers
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iframe.style.visibility = 'hidden';
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// for old browsers with crappy css
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iframe.style.border = '0';
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iframe.style.width = '0';
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iframe.style.height = '0';
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if (document.all) {
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// MSIE, opera
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iframe.src = form;
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document.body.appendChild(iframe);
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} else {
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document.body.appendChild(iframe);
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iframe.src = form;
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}
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} catch(exception) {
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// dom failed, write the sucker manually
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var html = '<iframe src="' + form +'" id="' + this._id + '" style="visibility:hidden;border:0;height:0;width:0;"></iframe>';
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document.body.innerHTML += html;
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}
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if (this._async == true) {
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//avoid race state if onload is called first
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if (this.readyState < 3) {
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this.readyState = 3;
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if(typeof(this.onreadystatechange) == "function") {
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this.onreadystatechange();
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}
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}
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} else {
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//we force a while loop for sync, it's ugly but hopefully it works
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while (this.readyState != 4) {
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//just check to see if we can up readyState
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if (this.readyState < 3) {
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this.readyState = 3;
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if(typeof(this.onreadystatechange) == "function") {
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this.onreadystatechange();
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}
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}
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}
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}
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},
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// attached as an onload function to the iframe to trigger when we're done
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isLoaded: function(headers, data)
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{
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this.readyState = 4;
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//set responseText, Status, StatusText
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this.status = 200;
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this.statusText = 'OK';
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this.responseText = data;
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this._response = headers;
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if (!this._response['Last-Modified']) {
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string += 'Last-Modified : ' + document.getElementById(this._id).lastModified + "\n";
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}
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if (!this._response['Content-Type']) {
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string += 'Content-Type : ' + document.getElementById(this._id).contentType + "\n";
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}
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// if this is xml populate responseXML accordingly
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if (this._response['Content-Type'] == 'application/xml')
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{
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return new DOMParser().parseFromString(this.responseText, 'application/xml');
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}
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//attempt opera history munging in opera 8+ - this is a REGRESSION IN OPERA
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if (window.opera && window.opera.version) {
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//go back current history - old history
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window.history.go(this._history - window.history.length);
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}
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if (typeof(this.onreadystatechange) == "function") {
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this.onreadystatechange();
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}
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document.body.removeChild(document.getElementById(this._id));
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},
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// strip off the c and m from the url send...yuck
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_decodeUrl: function(querystring)
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{
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//opera 7 is too stupid to do a relative url...go figure
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var url = unescape(location.href);
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url = url.substring(0, url.lastIndexOf("/") + 1);
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var item = querystring.split('?');
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//rip off any path info and append to path above <- relative paths (../) WILL screw this
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this._url = url + item[0].substring(item[0].lastIndexOf("/") + 1,item[0].length);
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if(item[1]) {
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item = item[1].split('&');
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for (i in item) {
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var v = item[i].split('=');
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if (v[0] == 'c') {
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this._phpclass = v[1];
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} else if (v[0] == 'm') {
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this._phpmethod = v[1];
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}
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}
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}
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if (!this._phpclass || !this._phpmethod) {
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var cloc = window.location.href;
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this._url = cloc + (cloc.indexOf('?') >= 0 ? '&' : '?') + 'px=' + escape(HTML_AJAX_Util.absoluteURL(querystring));
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}
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}
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}
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