PHP Classes

File: examples/AjaxTest/lib/Js.js

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File: examples/AjaxTest/lib/Js.js
Role: Auxiliary script
Content type: text/plain
Description: Ajax JS file
Class: Cyrillic to Latin
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/** * Subsys_JsHttpRequest_Js: JavaScript DHTML data loader. * (C) 2005 Dmitry Koterov, http://forum.dklab.ru/users/DmitryKoterov/ * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * See http://www.gnu.org/copyleft/lesser.html * * Do not remove this comment if you want to use script! * Не удаляйте данный комментарий, если вы хотите использовать скрипт! * * This library tries to use XMLHttpRequest (if available), and on * failure - use dynamically created <script> elements. Backend code * is the same for both cases. * * @author Dmitry Koterov * @version 3.25 */ function Subsys_JsHttpRequest_Js() { this._construct() } (function() { // to create local-scope variables var COUNT = 0; var PENDING = {}; var CACHE = {}; // Called by server script on data load. Subsys_JsHttpRequest_Js.dataReady = function(id, text, js) { var undef; var th = PENDING[id]; delete PENDING[id]; if (th) { delete th._xmlReq; if (th.caching) CACHE[th.hash] = [text, js]; th._dataReady(text, js); } else if (typeof(th) != typeof(undef)) { alert("ScriptLoader: unknown pending id: "+id); } } Subsys_JsHttpRequest_Js.prototype = { // Standard properties. onreadystatechange: null, readyState: 0, responseText: null, responseXML: null, status: 200, statusText: "OK", // Additional properties. session_name: "PHPSESSID", // set to SID cookie or GET parameter name responseJS: null, // JavaScript response array/hash caching: false, // need to use caching? // Internals. _span: null, _id: null, _xmlReq: null, _openArg: null, _reqHeaders: null, abort: function() { if (this._xmlReq) return this._xmlReq.abort(); if (this._span) { this.readyState = 0; if (this.onreadystatechange) this.onreadystatechange(); this._cleanupScript(); } }, open: function(method, url, asyncFlag, username, password) { this._openArg = { 'method': method, 'url': url, 'asyncFlag': asyncFlag, 'username': username, 'password': password }; this._id = null; this._xmlReq = null; this._reqHeaders = []; return true; }, send: function(content) { var id = (new Date().getTime()) + "" + COUNT++; // Build QUERY_STRING from query hash. var query = this._hash2query(content); // Append SID to original URL now. var url = this._openArg.url; var sid = this._getSid(); if (sid) url += (url.indexOf('?')>=0? '&' : '?') + this.session_name + "=" + escape(sid); // Solve hash BEFORE appending ID. var hash = this.hash = url + '?' + query; if (this.caching && CACHE[hash]) { var c = CACHE[hash]; this._dataReady(c[0], c[1]); return false; } // Try to use XMLHttpRequest. this._xmlReq = this._obtainXmlReq(id, url); // Pass data in URL (GET, HEAD etc.) or in request body (POST)? var hasSetHeader = this._xmlReq && (window.ActiveXObject || this._xmlReq.setRequestHeader); var href, body; if (this._xmlReq && hasSetHeader && (""+this._openArg.method).toUpperCase() == "POST") { // Use POST method. Pass query in request body. // Opera 8.01 does not support setRequestHeader, so no POST method. this._openArg.method = "POST"; href = url; body = query; } else { this._openArg.method = "GET"; href = url + (url.indexOf('?')>=0? '&' : '?') + query; body = null; } // Append ID: a=aaa&b=bbb&<id> href = href + (href.indexOf('?')>=0? '&' : '?') + id; // Save loading script. PENDING[id] = this; if (this._xmlReq) { // Open request now & send it. // In XMLHttpRequest mode request URL MUST be ended with "<id>-xml". var a = this._openArg; this._xmlReq.open(a.method, href+"-xml", a.asyncFlag, a.username, a.password); if (hasSetHeader) { // Pass pending headers. for (var i=0; i<this._reqHeaders.length; i++) this._xmlReq.setRequestHeader(this._reqHeaders[i][0], this._reqHeaders[i][1]); // Set non-default Content-type. We cannot use // "application/x-www-form-urlencoded" here, because // in PHP variable HTTP_RAW_POST_DATA is accessible only when // enctype is not default (e.g., "application/octet-stream" // is a good start). We parse POST data manually in backend // library code. this._xmlReq.setRequestHeader('Content-Type', 'application/octet-stream'); } // Send the request. return this._xmlReq.send(body); } else { // Create <script> element and run it. this._obtainScript(id, href); return true; } }, getAllResponseHeaders: function() { if (this._xmlReq) return this._xmlReq.getAllResponseHeaders(); return ''; }, getResponseHeader: function(label) { if (this._xmlReq) return this._xmlReq.getResponseHeader(label); return ''; }, setRequestHeader: function(label, value) { // Collect headers. this._reqHeaders[this._reqHeaders.length] = [label, value]; }, // // Internal functions. // // Constructor. _construct: function() {}, // Do all work when data is ready. _dataReady: function(text, js) { with (this) { if (text !== null || js !== null) { readyState = 4; responseText = responseXML = text; responseJS = js; } else { readyState = 0; responseText = responseXML = responseJS = null; } if (onreadystatechange) onreadystatechange(); _cleanupScript(); }}, // Create new XMLHttpRequest object. _obtainXmlReq: function(id, url) { // If url.domain specified, cannot use XMLHttpRequest! if (url.match(new RegExp('^[a-z]+://', 'i'))) return null; // Try to use built-in loaders. var req = null; if (window.XMLHttpRequest) { try { req = new XMLHttpRequest() } catch(e) {} } else if (window.ActiveXObject) { try { req = new ActiveXObject("Microsoft.XMLHTTP") } catch(e) {} if (!req) try { req = new ActiveXObject("Msxml2.XMLHTTP") } catch (e) {} } if (req) { var th = this; req.onreadystatechange = function() { if (req.readyState == 4) { // Remove possible junk from response. var responseText = req.responseText; try { // Call associated dataReady(). eval(responseText); } catch (e) { Subsys_JsHttpRequest_Js.dataReady(id, "JavaScript code generated by backend is invalid!\n"+responseText, null); } } else { th.readyState = req.readyState; if (th.onreadystatechange) th.onreadystatechange() } }; this._id = id; } return req; }, // Create new script element and start loading. _obtainScript: function(id, href) { with (document) { var span = null; // Oh shit! Damned stupid fucked Opera 7.23 does not allow to create SCRIPT // element over createElement (in HEAD or BODY section or in nested SPAN - // no matter): it is created deadly, and does not respons on href assignment. // So - always create SPAN. span = body.appendChild(createElement("SPAN")); span.style.display = 'none'; span.innerHTML = 'Text for stupid IE.<s'+'cript></' + 'script>'; setTimeout(function() { var s = span.getElementsByTagName("script")[0]; s.language = "JavaScript"; if (s.setAttribute) s.setAttribute('src', href); else s.src = href; }, 10); this._id = id; this._span = span; }}, // Remove last used script element (clean memory). _cleanupScript: function() { var span = this._span; if (span) { this._span = null; setTimeout(function() { // without setTimeout - crash in IE 5.0! span.parentNode.removeChild(span); }, 50); } return false; }, // Convert hash to QUERY_STRING. _hash2query: function(content, prefix) { if (prefix == null) prefix = ""; var query = []; if (content instanceof Object) { for (var k in content) { var v = content[k]; if (v.constructor.prototype[k]) continue; var curPrefix = prefix? prefix+'['+escape(k)+']' : escape(k); if (v instanceof Object) query[query.length] = this._hash2query(v, curPrefix); else query[query.length] = curPrefix + "=" + escape(v); } } else { query = [content]; } return query.join('&'); }, // Return value of SID based on QUERY_STRING or cookie // (PHP compatible sessions). _getSid: function() { var m = document.location.search.match(new RegExp('[&?]'+this.session_name+'=([^&?]*)')); var sid = null; if (m) { sid = m[1]; } else { var m = document.cookie.match(new RegExp(s='(;|^)\\s*'+this.session_name+'=([^;]*)')); if (m) sid = m[2]; } return sid; } } })();