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https://github.com/ACSPRI/queXS
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Import from DCARF SVN
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azammitdcarf
269
include/pear/data/HTML_AJAX/js/HttpClient.js
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269
include/pear/data/HTML_AJAX/js/HttpClient.js
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/**
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* XMLHttpRequest Wrapper
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* @category HTML
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* @package AJAX
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* @author Joshua Eichorn <josh@bluga.net>
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* @copyright 2005 Joshua Eichorn
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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*/
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function HTML_AJAX_HttpClient() { }
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HTML_AJAX_HttpClient.prototype = {
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// request object
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request: null,
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// timeout id
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_timeoutId: null,
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callbackComplete: true,
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// has this request been aborted
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aborted: false,
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// method to initialize an xmlhttpclient
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init:function()
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{
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try {
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// Mozilla / Safari
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//this.xmlhttp = new HTML_AJAX_IframeXHR(); //uncomment these two lines to test iframe
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//return;
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this.xmlhttp = new XMLHttpRequest();
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} catch (e) {
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// IE
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var XMLHTTP_IDS = new Array(
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'MSXML2.XMLHTTP.5.0',
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'MSXML2.XMLHTTP.4.0',
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'MSXML2.XMLHTTP.3.0',
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'MSXML2.XMLHTTP',
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'Microsoft.XMLHTTP' );
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var success = false;
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for (var i=0;i < XMLHTTP_IDS.length && !success; i++) {
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try {
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this.xmlhttp = new ActiveXObject(XMLHTTP_IDS[i]);
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success = true;
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} catch (e) {}
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}
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if (!success) {
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try{
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this.xmlhttp = new HTML_AJAX_IframeXHR();
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this.request.iframe = true;
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} catch(e) {
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throw new Error('Unable to create XMLHttpRequest.');
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}
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}
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}
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},
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// check if there is a call in progress
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callInProgress: function()
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{
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switch ( this.xmlhttp.readyState ) {
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case 1:
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case 2:
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case 3:
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return true;
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break;
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default:
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return false;
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break;
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}
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},
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// make the request defined in the request object
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makeRequest: function()
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{
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if (!this.xmlhttp) {
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this.init();
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}
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try {
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if (this.request.Open) {
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this.request.Open();
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}
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else if (HTML_AJAX.Open) {
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HTML_AJAX.Open(this.request);
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}
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if (this.request.multipart) {
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if (document.all) {
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this.iframe = true;
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} else {
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this.xmlhttp.multipart = true;
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}
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}
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// set onreadystatechange here since it will be reset after a completed call in Mozilla
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var self = this;
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this.xmlhttp.open(this.request.requestType,this.request.completeUrl(),this.request.isAsync);
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if (this.request.customHeaders) {
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for (i in this.request.customHeaders) {
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this.xmlhttp.setRequestHeader(i, this.request.customHeaders[i]);
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}
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}
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if (this.request.customHeaders && !this.request.customHeaders['Content-Type']) {
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var content = this.request.getContentType();
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//opera is stupid for anything but plain text or xml!!
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if(window.opera && content != 'application/xml')
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{
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this.xmlhttp.setRequestHeader('Content-Type','text/plain; charset=utf-8');
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this.xmlhttp.setRequestHeader('x-Content-Type', content + '; charset=utf-8');
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}
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else
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{
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this.xmlhttp.setRequestHeader('Content-Type', content + '; charset=utf-8');
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}
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}
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if (this.request.isAsync) {
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if (this.request.callback) {
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this.callbackComplete = false;
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}
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this.xmlhttp.onreadystatechange = function() { self._readyStateChangeCallback(); }
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} else {
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this.xmlhttp.onreadystatechange = function() {}
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}
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var payload = this.request.getSerializedPayload();
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if (payload) {
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this.xmlhttp.setRequestHeader('Content-Length', payload.length);
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}
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this.xmlhttp.send(payload);
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if (!this.request.isAsync) {
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if ( this.xmlhttp.status == 200 ) {
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HTML_AJAX.requestComplete(this.request);
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if (this.request.Load) {
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this.request.Load();
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} else if (HTML_AJAX.Load) {
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HTML_AJAX.Load(this.request);
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}
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return this._decodeResponse();
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} else {
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var e = new Error('['+this.xmlhttp.status +'] '+this.xmlhttp.statusText);
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e.headers = this.xmlhttp.getAllResponseHeaders();
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this._handleError(e);
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}
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}
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else {
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// setup timeout
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var self = this;
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this._timeoutId = window.setTimeout(function() { self.abort(true); },this.request.timeout);
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}
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} catch (e) {
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this._handleError(e);
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}
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},
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// abort an inprogress request
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abort: function (automatic)
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{
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if (this.callInProgress()) {
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this.aborted = true;
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this.xmlhttp.abort();
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if (automatic) {
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HTML_AJAX.requestComplete(this.request);
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this._handleError(new Error('Request Timed Out: time out was '+this.request.timeout+'ms'));
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}
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}
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},
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// internal method used to handle ready state changes
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_readyStateChangeCallback:function()
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{
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try {
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switch(this.xmlhttp.readyState) {
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// XMLHTTPRequest.open() has just been called
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case 1:
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break;
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// XMLHTTPRequest.send() has just been called
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case 2:
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if (this.request.Send) {
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this.request.Send();
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} else if (HTML_AJAX.Send) {
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HTML_AJAX.Send(this.request);
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}
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break;
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// Fetching response from server in progress
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case 3:
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if (this.request.Progress) {
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this.request.Progress();
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} else if (HTML_AJAX.Progress ) {
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HTML_AJAX.Progress(this.request);
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}
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break;
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// Download complete
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case 4:
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window.clearTimeout(this._timeoutId);
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if (this.aborted) {
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if (this.request.Load) {
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this.request.Load();
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} else if (HTML_AJAX.Load) {
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HTML_AJAX.Load(this.request);
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}
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}
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else if (this.xmlhttp.status == 200) {
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if (this.request.Load) {
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this.request.Load();
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} else if (HTML_AJAX.Load ) {
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HTML_AJAX.Load(this.request);
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}
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var response = this._decodeResponse();
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if (this.request.callback) {
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this.request.callback(response);
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this.callbackComplete = true;
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}
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}
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else {
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var e = new Error('HTTP Error Making Request: ['+this.xmlhttp.status+'] '+this.xmlhttp.statusText);
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this._handleError(e);
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}
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HTML_AJAX.requestComplete(this.request);
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break;
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}
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} catch (e) {
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this._handleError(e);
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}
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},
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// decode response as needed
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_decodeResponse: function() {
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//try for x-Content-Type first
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var content = null;
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try {
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content = this.xmlhttp.getResponseHeader('X-Content-Type');
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} catch(e) {}
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if(!content || content == null)
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{
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content = this.xmlhttp.getResponseHeader('Content-Type');
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}
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//strip anything after ;
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if(content.indexOf(';') != -1)
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{
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content = content.substring(0, content.indexOf(';'));
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}
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// hook for xml, it doesn't need to be unserialized
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if(content == 'application/xml')
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{
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return this.xmlhttp.responseXML;
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}
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var unserializer = HTML_AJAX.serializerForEncoding(content);
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//alert(this.xmlhttp.getAllResponseHeaders()); // some sort of debug hook is needed here
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return unserializer.unserialize(this.xmlhttp.responseText);
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},
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// handle sending an error where it needs to go
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_handleError: function(e)
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{
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HTML_AJAX.requestComplete(this.request,e);
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if (this.request.onError) {
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this.request.onError(e);
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} else if (HTML_AJAX.onError) {
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HTML_AJAX.onError(e,this.request);
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}
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else {
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throw e;
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}
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}
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}
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