/* Cross-Browser XMLHttpRequest v1.2 ================================= Emulate Gecko 'XMLHttpRequest()' functionality in IE and Opera. Opera requires the Sun Java Runtime Environment . by Andrew Gregory http://www.scss.com.au/family/andrew/webdesign/xmlhttprequest/ This work is licensed under the Creative Commons Attribution License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/2.5/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA. Attribution: Leave my name and web address in this script intact. Not Supported in Opera ---------------------- * user/password authentication * responseXML data member Not Fully Supported in Opera ---------------------------- * async requests * abort() * getAllResponseHeaders(), getAllResponseHeader(header) */// IE support if (window.ActiveXObject && ! window.XMLHttpRequest) { window.XMLHttpRequest = function() {var msxmls = new Array('Msxml2.XMLHTTP.5.0', 'Msxml2.XMLHTTP.4.0', 'Msxml2.XMLHTTP.3.0', 'Msxml2.XMLHTTP', 'Microsoft.XMLHTTP'); for (var i = 0;i < msxmls.length;i++) {try {return new ActiveXObject(msxmls[i]); } catch (e) { } } return null; }; } // Gecko support /* ;-) */// Opera support if (window.opera && ! window.XMLHttpRequest) { window.XMLHttpRequest = function() {this.readyState = 0; // 0=uninitialized,1=loading,2=loaded,3=interactive,4=complete this.status = 0; // HTTP status codes this.statusText = ''; this._headers =[]; this._aborted = false; this._async = true; this._defaultCharset = 'ISO-8859-1'; this._getCharset = function() {var charset = _defaultCharset; var contentType = this.getResponseHeader('Content-type').toUpperCase(); val = contentType.indexOf('CHARSET='); if (val != - 1) {charset = contentType.substring(val); } val = charset.indexOf(';'); if (val != - 1) {charset = charset.substring(0, val); } val = charset.indexOf(','); if (val != - 1) {charset = charset.substring(0, val); } return charset; }; this.abort = function() {this._aborted = true; }; this.getAllResponseHeaders = function() {return this.getAllResponseHeader( '*'); }; this.getAllResponseHeader = function(header) {var ret = ''; for (var i = 0;i < this._headers.length;i++) {if (header == '*' || this._headers[i].h == header) {ret += this._headers[i].h +': ' + this._headers[i].v + '\n'; } } return ret; }; this.getResponseHeader = function(header) {var ret = getAllResponseHeader(header); var i = ret.indexOf('\n'); if (i != - 1) {ret = ret.substring(0, i); } return ret; }; this.setRequestHeader = function(header, value) {this._headers[this._headers.length] = {h: header, v: value}; }; this.open = function(method, url, async, user, password) {this.method = method; this.url = url; this._async = true; this._aborted = false; this._headers =[]; if (arguments.length >= 3) {this._async = async; } if (arguments.length > 3) {opera.postError('XMLHttpRequest.open() - user/password not supported'); } this.readyState = 1; if (this.onreadystatechange) {this.onreadystatechange(); } }; this.send = function(data) {if ( ! navigator.javaEnabled()) {alert("XMLHttpRequest.send() - Java must be installed and enabled."); return; } if (this._async) {setTimeout(this._sendasync, 0, this, data);// this is not really asynchronous and won't execute until the current // execution context ends } else {this._sendsync(data); } }; this._sendasync = function(req, data) {if ( ! req._aborted) {req._sendsync(data); } }; this._sendsync = function(data) { this.readyState = 2; if (this.onreadystatechange) { this.onreadystatechange(); } // open connection var url = new java.net.URL(new java.net.URL(window.location.href), this.url); var conn = url.openConnection(); for (var i = 0;i < this._headers.length;i++) {conn.setRequestProperty(this._headers[i].h, this._headers[i].v); } this._headers =[]; if (this.method == 'POST') {// POST data conn.setDoOutput(true); var wr = new java.io.OutputStreamWriter(conn.getOutputStream(), this._getCharset()); wr.write(data); wr.flush(); wr.close(); } // read response headers // NOTE: the getHeaderField() methods always return nulls for me :( var gotContentEncoding = false; var gotContentLength = false; var gotContentType = false; var gotDate = false; var gotExpiration = false; var gotLastModified = false; for (var i = 0;;i++) {var hdrName = conn.getHeaderFieldKey(i); var hdrValue = conn.getHeaderField(i); if (hdrName == null && hdrValue == null) {break; } if (hdrName != null) {this._headers[this._headers.length] = {h: hdrName, v: hdrValue}; switch (hdrName.toLowerCase()) {case 'content-encoding': gotContentEncoding = true; break; case 'content-length': gotContentLength = true; break; case 'content-type': gotContentType = true; break; case 'date': gotDate = true; break; case 'expires': gotExpiration = true; break; case 'last-modified': gotLastModified = true; break; } } } // try to fill in any missing header information var val; val = conn.getContentEncoding(); if (val != null && ! gotContentEncoding) this._headers[this._headers.length] = {h: 'Content-encoding', v: val}; val = conn.getContentLength(); if (val != - 1 && ! gotContentLength) this._headers[this._headers.length] = {h: 'Content-length', v: val}; val = conn.getContentType(); if (val != null && ! gotContentType) this._headers[this._headers.length] = {h: 'Content-type', v: val}; val = conn.getDate(); if (val != 0 && ! gotDate) this._headers[this._headers.length] = {h: 'Date', v: (new Date(val)).toUTCString()}; val = conn.getExpiration(); if (val != 0 && ! gotExpiration) this._headers[this._headers.length] = {h: 'Expires', v: (new Date(val)).toUTCString()}; val = conn.getLastModified(); if (val != 0 && ! gotLastModified) this._headers[this._headers.length] = {h: 'Last-modified', v: (new Date(val)).toUTCString()};// read response data var reqdata = ''; var stream = conn.getInputStream(); if (stream) {var reader = new java.io.BufferedReader(new java.io.InputStreamReader(stream, this._getCharset())); var line; while ((line = reader.readLine()) != null) {if (this.readyState == 2) {this.readyState = 3; if (this.onreadystatechange) {this.onreadystatechange(); } } reqdata += line + '\n'; } reader.close(); this.status = 200; this.statusText = 'OK'; this.responseText = reqdata; this.readyState = 4; if (this.onreadystatechange) {this.onreadystatechange(); } if (this.onload) {this.onload(); } } else {// error this.status = 404; this.statusText = 'Not Found'; this.responseText = ''; this.readyState = 4; if (this.onreadystatechange) {this.onreadystatechange(); } if (this.onerror) {this.onerror(); } } }; }; } // ActiveXObject emulation if ( ! window.ActiveXObject && window.XMLHttpRequest) { window.ActiveXObject = function(type) {switch (type.toLowerCase()) {case 'microsoft.xmlhttp': case 'msxml2.xmlhttp': case 'msxml2.xmlhttp.3.0': case 'msxml2.xmlhttp.4.0': case 'msxml2.xmlhttp.5.0': return new XMLHttpRequest(); } return null; }; }