// --------------------- Ajax Chat Class (c) fijiwebdesign.com ------------------------------------------- var _ms_XMLHttpRequest_ActiveX = ""; // Holds type of ActiveX to instantiate for differing browsers var _ajax; // Reference to a global XMLHTTPRequest object var _logger = false; // write output to the Activity Log false on startup var _status_area; // will point to the area to write status messages to BASE_URL = "."; if ( document.location.href.indexOf("www.fijiwebdesign.com") > 0 ) { BASE_URL = "/projects"; } if (!window.Node || !window.Node.ELEMENT_NODE) { var Node = { ELEMENT_NODE: 1, ATTRIBUTE_NODE: 2, TEXT_NODE: 3, CDATA_SECTION_NODE: 4, ENTITY_REFERENCE_NODE: 5, ENTITY_NODE: 6, PROCESSING_INSTRUCTION_NODE: 7, COMMENT_NODE: 8, DOCUMENT_NODE: 9, DOCUMENT_TYPE_NODE: 10, DOCUMENT_FRAGMENT_NODE: 11, NOTATION_NODE: 12 }; } /** * Only declare $ if not already declared * IE7 will declare function declarations in conditionals, so we need to use = */ if (typeof($) == 'undefined') { $ = function() { var elements = new Array(); for (var i = 0; i < arguments.length; i++) { var element = arguments[i]; if (typeof element == 'string') element = document.getElementById(element); if (arguments.length == 1) return element; elements.push(element); } return elements; } } /** * Method to get text from an XML DOM object */ function getTextFromXML( oNode, deep ) { var s = ""; var nodes = oNode.childNodes; for (var i = 0; i < nodes.length; i++) { var node = nodes[i]; if (node.nodeType == Node.TEXT_NODE) { s += node.data; } else if (deep == true && (node.nodeType == Node.ELEMENT_NODE || node.nodeType == Node.DOCUMENT_NODE || node.nodeType == Node.DOCUMENT_FRAGMENT_NODE)) { s += getTextFromXML(node, true); }; } ; return s; } ; /** * If you plan on doing anything outside of North America, then you'd better encode the things you pass back and forth * the escape() method in Javascript is deprecated -- should use encodeURIComponent if available */ function encode( uri ) { if (encodeURIComponent) { return encodeURIComponent(uri); } if (escape) { return escape(uri); } } /** * Decodes URI */ function decode( uri ) { uri = uri.replace(/\+/g, ' '); if (decodeURIComponent) { return decodeURIComponent(uri); } if (unescape) { return unescape(uri); } return uri; } /** * log information to the status area textfield */ function logger( text, clear ) { if (_logger) { if (!_status_area) { _status_area = document.getElementById("status_area"); } if (_status_area) { if (clear) { _status_area.value = ""; } var old = _status_area.value; _status_area.value = text + ((old) ? "\r\n" : "") + old; } } } /** * Executes the returned text from the xmlHttp Requrest * If the function executeReturnExt() exists it will be executed instead */ function executeReturn( AJAX ) { if (AJAX.readyState == 4) { if (AJAX.status == 200) { logger('AJAXRequest is complete: ' + AJAX.readyState + "/" + AJAX.status + "/" + AJAX.statusText); if ( AJAX.responseText ) { logger(AJAX.responseText); if (!executeReturnExt) { eval(AJAX.responseText); // evaluate returned text } else { executeReturnExt(AJAX); // execute custom function } } } } } /** * Converts HTML to HTML Entities */ function html2entities(str){ //alert(str); var newstr; newstr = str.replace("//", ">"); newstr = str.replace("/\"/", """); newstr = str.replace("/'/", "'"); newstr = str.replace("/&/", "&"); return newstr; } var ix = 0; var responseXML = new Array(); /** * views any recieved xml Response (debugging) */ function viewResp(id) { return responseXML[id]; } /** * Encapsulated xmlHttpRequest Object */ function AJAXRequest( method, url, data, process, async, dosend) { // self = this; creates a pointer to the current function // the pointer will be used to create a "closure". A closure // allows a subordinate function to contain an object reference to the // calling function. We can't just use "this" because in our anonymous // function later, "this" will refer to the object that calls the function // during runtime, not the AJAXRequest function that is declaring the function // clear as mud, right? // Java this ain't var self = this; // check the dom to see if this is IE or not if (window.XMLHttpRequest) { // Not IE self.AJAX = new XMLHttpRequest(); } else if (window.ActiveXObject) { // Hello IE! // Instantiate the latest MS ActiveX Objects if (_ms_XMLHttpRequest_ActiveX) { self.AJAX = new ActiveXObject(_ms_XMLHttpRequest_ActiveX); } else { // loops through the various versions of XMLHTTP to ensure we're using the latest var versions = ["Msxml2.XMLHTTP.7.0", "Msxml2.XMLHTTP.6.0", "Msxml2.XMLHTTP.5.0", "Msxml2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"]; for (var i = 0; i < versions.length ; i++) { try { // try to create the object // if it doesn't work, we'll try again // if it does work, we'll save a reference to the proper one to speed up future instantiations self.AJAX = new ActiveXObject(versions[i]); if (self.AJAX) { _ms_XMLHttpRequest_ActiveX = versions[i]; break; } } catch (e) { // trap; try next one } ; } ; } } // if no callback process is specified, then assing a default which executes the code returned by the server if (typeof process == 'undefined' || process == null) { process = executeReturn; } self.process = process; // create an anonymous function to log state changes self.AJAX.onreadystatechange = function( ) { //logger("AJAXRequest Handler: State = " + self.AJAX.readyState); self.process(self.AJAX); } // if no method specified, then default to POST if (!method) { method = "POST"; } method = method.toUpperCase(); if (typeof async == 'undefined' || async == null) { async = true; } logger("----------------------------------------------------------------------"); logger("AJAX Request: " + ((async) ? "Async" : "Sync") + " " + method + ": URL: " + url + ", Data: " + data); try { self.AJAX.open(method, url, async); } catch(e) { //alert("xmlHTTPRequest.open() failed: " + ((async) ? "Async" : "Sync") + " " + method + ": URL: " + url + ", Data: " + data + ' from:'+window.location.href); if (!retry_xmlHTTPRequest_open(function() { self.AJsAX.open(method, url, async); })) { return false; } } if (method == "POST") { //self.AJAX.setRequestHeader("Connection", "close"); self.AJAX.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); self.AJAX.setRequestHeader("Method", "POST " + url + " HTTP/1.1"); } // if dosend is true or undefined, send the request // only fails is dosend is false // you'd do this to set special request headers if ( dosend || typeof dosend == 'undefined' ) { if ( !data ) data=""; self.AJAX.send(data); } return self.AJAX; } // catch the exception when xmlHTTPRequest.open() denied. refreshing once seems to do the trick function retry_xmlHTTPRequest_open(retry_function) { // Instantiate the common lib var common = new commonLib(); // first we retry the xmlHTTPRequest.open() try { retry_function(); return true; } catch(e) { } // xmlHTTPRequest.open() retry didn't work. Try refreshing page var append = '&'; if (window.location.href.indexOf('?') === -1) { append = '?'; } // check if user does not want any more reloads if (common.getCookie('ajc_noreload') == '1') { //common.setCookie('ajc_noreload', '0'); return false; } if (window.location.href.indexOf('reloaded=1') !== -1) { if (confirm("The AjaxChat application is having problems initiating. \r\nWould you like to reload the page?")) { window.location = window.location.href+append+'reloaded=1'; } else { // set a cookie to stop further reload requests common.setCookie('ajc_noreload', '1'); } } else { window.location = window.location.href+append+'reloaded=1'; } return false; } // ----------------------------- obj debug ----------------------------------- // /** * Alerts the properties of an obj. Used for debugging objects * @param object Object to debug * @param string object name */ function alertObj(obj, name) { if (typeof(obj) == 'object') { for (x in obj) { alertObj(obj[x], x); } } else { _debug(name+'=>'+obj); } } /** * Counts the properties of an obj. Slower but seems to be the only method that works on every object * @param object Object to count properties of */ function propertyCount(obj) { var i = 0; for (x in obj) { i++; } return i; }