extjs 同步请求
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页面必须引入ext-basex.js文件：
/* global Ext *//* * ext-basex 3.5.1 * *********************************************************************************** * * Ext.lib.Ajax enhancements: * - adds EventManager Support to Ext.lib.Ajax (if Ext.util.Observable is present in the stack) * - adds Synchronous Ajax Support ( options.async =false ) * - Permits IE to Access Local File Systems using IE's older ActiveX interface via the forceActiveX property * - Pluggable Form encoder (encodeURIComponent is still the default encoder) * - Corrects the Content-Type Headers for posting JSON (application/json) and XML (text/xml) * data payloads and sets only one value (per RFC) * - Adds fullStatus:{ isLocal, proxied, isOK, isError, isTimeout, isAbort, error, status, statusText} object * to the existing Response Object. * - Adds standard HTTP Auth support to every request (XHR userId, password config options) * - options.method prevails over any method derived by the lib.Ajax stack (DELETE, PUT, HEAD etc). * - Adds named-Priority-Queuing for Ajax Requests * - adds Script=Tag support for foreign-domains (proxied:true) with configurable callbacks. * - Adds final features for $JIT support. * * - Adds Browser capabilities object reporting on presence of (SVG, Canvas, Flash, Cookies, XPath ) * if(Ext.capabilities.hasFlash){ ... } * - Adds Ext.overload supported for parameter-based overloading of Function and class methods. * - Adds Ext.clone functions for any datatype. * - Adds Array prototype features: first, last, clone, forEach, atRandom, include, flatten, compact, unique, filter, map * - Connection/response object members : getAllResponseHeaders, getResponseHeader are now functions. * - Adds Array.slice support for other browsers (Gecko already supports it) * @example: Array.slice( someArray, 2 ) * - Adds Ext[isFunction, isObject, isDocument, isElement, isEvent] methods. * - Adds Ext.isEventSupported('resize'[, forElement]) to determine if the browser supports a specific event. * - Adds multiPart Response handling (via onpart callbacks and/or parts Array of response Object) * - Adds parsed contentType to response objects * - Adds Xdomain request support for modern browsers * * *********************************************************************************** * Author: Doug Hendricks. doug[always-At]theactivegroup.com Copyright * 2007-2009, Active Group, Inc. All rights reserved. * *********************************************************************************** * * License: ext-basex is licensed under the terms of : GNU Open Source GPL 3.0 * * Commercial use is prohibited without a Developer License, see: * http://licensing.theactivegroup.com. * * This program is free software: you can redistribute it and/or modify it under * the terms of the GNU General Public License as published by the Free Software * Foundation, either version 3 of the License, or any later version. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see < http://www.gnu.org/licenses/gpl.html>. * * Donations are welcomed: http://donate.theactivegroup.com * */ (function() { var A = Ext.lib.Ajax, defined = function(test){return typeof test != 'undefined';}, emptyFn = Ext.emptyFn || function(){}, OP = Object.prototype; Ext.lib.Ajax.Queue = function(config) { config = config ? (config.name ? config : { name : config }) : {}; Ext.apply(this, config, { name : 'q-default', priority : 5, FIFO : true, // false implies LIFO callback : null, // optional callback when queue is emptied scope : null, // scope of callback suspended : false, progressive : false // if true, one queue item is dispatched per poll interval }); this.requests = new Array(); this.pending = false; // assert/resolve to 0-9 this.priority = this.priority > 9 ? 9 : (this.priority < 0 ? 0 : this.priority); }; Ext.extend(Ext.lib.Ajax.Queue, Object, { /** * Adds Ext.lib.Ajax.request arguments to queue * @param {Array} request An array of request method arguments. * */ add : function(req) { var permit = A.events ? A.fireEvent('beforequeue', this, req) : true; if (permit !== false) { this.requests.push(req); this.pending = true; A.pendingRequests++; this.manager && this.manager.start(); } }, /** * @property {Boolean} suspended Indicate the suspense state of the queue. */ suspended : false, /** * @property {Object} activeRequest A reference to current/last active request. */ activeRequest : null, /** * Selects the next item on the queue stack * @param {Boolean} peek If true, the queue item is returned but not removed from the stack. * @ default false */ next : function(peek) { var req = peek ? this.requests[this.FIFO ? 'first' : 'last']() :this.requests[this.FIFO ? 'shift' : 'pop'](); if (this.requests.length == 0) { // queue emptied callback this.pending = false; Ext.isFunction(this.callback) && this.callback.call(this.scope || null, this); A.events && A.fireEvent('queueempty', this); } return req || null; }, /** * clear the queue of any remaining (pending) requests */ clear : function() { this.suspend(); A.pendingRequests -= this.requests.length; this.requests.length = 0; this.pending = false; this.resume(); this.next(); //force the empty callback/event }, /** * Suspend queue further queue dispatches of any remaining (pending) requests until the {@link #Ext.ux.ModuleManager-resume} method is called. */ suspend : function() { this.suspended = true; }, /** Resume from a suspended state */ resume : function() { this.suspended = false; }, /** * Dispatches the next queue item and initiates a Ext.lib.Ajax request on the result. * @param {Boolean} peek If true, the queue item is returned but not removed from the stack. * @return activeRequest */ requestNext : function(peek) { var req; this.activeRequest = null; if (!this.suspended && (req = this.next(peek))) { if(req.active){ //was it aborted this.activeRequest = A.request.apply(A,req); A.pendingRequests--; } else { return this.requestNext(peek); } } return this.activeRequest; } }); Ext.lib.Ajax.QueueManager = function(config) { Ext.apply(this, config || {}, { quantas : 10, // adjustable milliseconds deferred dispatch // value priorityQueues : new Array(new Array(), new Array(), new Array(), new Array(), new Array(), new Array(), new Array(), new Array(), new Array(), new Array()), // iterable // array // (0-9) // of // prioritized // queues: queues : {} }); }; Ext.extend(Ext.lib.Ajax.QueueManager, Object, { /** * @cfg {Integer} quantas Adjustable milliseconds deferred dispatch timer interval */ quantas : 10, /** Return a named queue reference * param {String} name The name of the desired queue. * @return Ext.lib.Ajax.Queue */ getQueue : function(name) { return this.queues[name]; }, createQueue : function(config) { if (!config) {return null;} var q = new A.Queue(config); q.manager = this; this.queues[q.name] = q; var pqa = this.priorityQueues[q.priority]; pqa && pqa.indexOf(q.name) == -1 && pqa.push(q.name); return q; }, /** Remove a Queue by passed name or Queue Object reference * @param {String/Ext.lib.Ajax.Queue} queue */ removeQueue : function(q) { if (q && (q = this.getQueue(q.name || q))) { q.clear(); // purge any pending requests this.priorityQueues[q.priority].remove(q.name); delete this.queues[q.name]; } }, /** @private */ start : function() { if (!this.started) { this.started = true; this.dispatch(); } return this; }, /** Suspends all defined queues */ suspendAll : function() { forEach(this.queues, function(Q) { Q.suspend(); }); }, /** Resumes all suspended queues */ resumeAll : function() { forEach(this.queues, function(Q) { Q.resume(); }); this.start(); }, /** * @cfg (Boolean) progressive Default Dispatch mode for all defined queues<p> * a false value will exhaust a priority queue until empty during dispatch (sequential) <p> * true to dispatch a single request from each priority queue until all queues exhausted.<p>This * option may be set on the Queue itself as well. * @default false */ progressive : false, stop : function() { this.started = false; return this; }, /** private * main Request dispatch loop. This keeps the maximum allowed number of * requests going at any one time (based on defined queue priority and * dispatch mode (see progressive). */ dispatch : function(){ var qm = this, qmq = qm.queues; var quit=(A.activeRequests > A.maxConcurrentRequests); while(A.pendingRequests && !quit){ var disp = function(qName) { var q = qmq[qName], AR; while (q && !q.suspended && q.pending && q.requestNext()) { quit || (quit = A.activeRequests > A.maxConcurrentRequests); if(quit)break; // progressive, take the first one off each queue only if (q.progressive || qm.progressive) { break;} } // keep going? if(quit)return false; }; forEach(this.priorityQueues, function(pqueue) { // pqueue == array of queue names !!pqueue.length && forEach(pqueue , disp, this); quit || (quit = A.activeRequests > A.maxConcurrentRequests); if(quit)return false; }, this); } if(A.pendingRequests || quit){ this.dispatch.defer(this.quantas, this); } else{ this.stop(); } } }); Ext.apply(A, { headers : A.headers || {}, defaultPostHeader : A.defaultPostHeader || 'application/x-www-form-urlencoded; charset=UTF-8', defaultHeaders : A.defaultHeaders || {}, useDefaultXhrHeader : !!A.useDefaultXhrHeader, defaultXhrHeader : 'Ext.basex', poll : {}, pollInterval : A.pollInterval || 50, queueManager : new A.QueueManager(), // If true (or queue config object) ALL requests are queued queueAll : false, // the Current number of active Ajax requests. activeRequests : 0, // the Current number of pending Queued requests. pendingRequests : 0, /** * @property maxConcurrentRequests * Specify the maximum allowed during concurrent Queued browser (XHR) requests * Note: IE8 increases this limit to 6 */ maxConcurrentRequests : Ext.isIE ? Ext.value(window.maxConnectionsPerServer, 2) : 4, /** set True as needed, to coerce IE to use older ActiveX interface */ forceActiveX : false, /** * Global default may be toggled at any time */ async : true, /** private */ createXhrObject : function(transactionId, options) { var obj = { status : { isError : false }, tId : transactionId }, ecode = null; options || (options = {}); try { options.xdomain && window.XDomainRequest && (obj.conn = new XDomainRequest()); if (!defined(obj.conn) && window.ActiveXObject && !!Ext.value(options.forceActiveX, this.forceActiveX)) { throw ("IE7forceActiveX"); } obj.conn || (obj.conn = new XMLHttpRequest()); } catch (eo) { var actX = window.ActiveXObject ? ( options.multiPart ? this.activeXMultipart : this.activeX ) : null ; if(actX){ for (var i = 0, l = actX.length; i < l; i++) { try { obj.conn = new ActiveXObject(actX[i]); break; } catch (e) {ecode = (eo == "IE7forceActiveX"? e: eo);} } } } finally { obj.status.isError = !defined(obj.conn); obj.status.error= ecode; } return obj; }, createExceptionObject: function (tId, callbackArg, isAbort, isTimeout, errObj) { return { tId : tId, status : isAbort ? -1 : 0, statusText : isAbort ? 'transaction aborted' : 'communication failure', isAbort: isAbort, isTimeout: isTimeout, argument : callbackArg }; }, /* Replaceable Form encoder */ encoder : encodeURIComponent, serializeForm : function(){ var reSelect = /select-(one|multiple)/i, reInput = /file|undefined|reset|button/i, reChecks = /radio|checkbox/i; return function(form) { var fElements = form.elements || (document.forms[form] || Ext.getDom(form)).elements, hasSubmit = false, encoder = this.encoder, element, options, name, val, data = '', type; forEach(fElements, function(element) { name = element.name; type = element.type; if (!element.disabled && name){ if(reSelect.test(type)){ forEach(element.options, function(opt) { if (opt.selected) { data += String.format("{0}={1}&", encoder(name), (opt.hasAttribute ? opt.hasAttribute('value') : opt.getAttribute('value') !== null) ? opt.value : opt.text); } }); } else if(!reInput.test(type)) { if(!(reChecks.test(type) && !element.checked) && !(type == 'submit' && hasSubmit)){ data += encoder(name) + '=' + encoder(element.value) + '&'; hasSubmit = /submit/i.test(type); } } } }); return data.substr(0, data.length - 1); }; }(), /** private */ getHttpStatus : function(reqObj) { var statObj = { status : 0, statusText : '', isError : false, isLocal : false, isOK : true, error : null, isAbort : false, isTimeout : false }; try { if (!reqObj || !('status' in reqObj)) { throw ('noobj'); } statObj.status = reqObj.status; statObj.readyState = reqObj.readyState; statObj.isLocal = (!reqObj.status && location.protocol == "file:") || (Ext.isSafari && !defined(reqObj.status)); statObj.isOK = (statObj.isLocal || (statObj.status == 304 || statObj.status == 1223 || (statObj.status > 199 && statObj.status < 300))); statObj.statusText = reqObj.statusText || ''; } catch (e) { } // status may not avail/valid yet, called too early, or status not support by the transport return statObj; }, /** * @private */ handleTransactionResponse : function(o, callback, isAbort, isTimeout) { callback = callback || {}; var responseObject = null; o.isPart || A.activeRequests--; if (!o.status.isError) { o.status = this.getHttpStatus(o.conn); /* * create and enhance the response with proper status and XMLDOM * if necessary */ responseObject = this.createResponseObject(o, callback.argument, isAbort); } o.isPart || this.releaseObject(o); /* * checked again in case exception was raised - ActiveX was * disabled during XML-DOM creation? And mixin everything the * XHR object had to offer as well */ o.status.isError && (responseObject = Ext.apply({}, responseObject || {}, this.createExceptionObject(o.tId, callback.argument, (isAbort? isAbort: false), isTimeout, o.status.error))); responseObject.options = o.options; responseObject.fullStatus = o.status; if (!this.events || this.fireEvent('status:' + o.status.status, o.status.status, o, responseObject, callback, isAbort) !== false) { if (o.status.isOK && !o.status.isError) { if (!this.events || this.fireEvent('response', o, responseObject, callback, isAbort, isTimeout) !== false) { var cb = o.isPart? 'onpart':'success'; Ext.isFunction(callback[cb]) && callback[cb].call(callback.scope || null,responseObject); } } else { if (!this.events || this.fireEvent('exception', o, responseObject, callback, isAbort, isTimeout, responseObject.fullStatus.error) !== false) { Ext.isFunction(callback.failure) && callback.failure.call(callback.scope || null, responseObject, responseObject.fullStatus.error); } } } return responseObject; }, /** * @private * Release the allocated XHR object and reset any timers */ releaseObject:function(o){ if(o && Ext.value(o.tId,-1)+1){ if(this.poll[o.tId]){ window.clearInterval(this.poll[o.tId]); delete this.poll[o.tId]; } if(this.timeout[o.tId]){ window.clearInterval(this.timeout[o.tId]); delete this.timeout[o.tId]; } } o && (o.conn = null) ; }, /** * replace with a custom JSON decoder/validator if required */ decodeJSON : Ext.decode, /** * @cfg reCtypeJSON * regexp test pattern applied to incoming response Content-Type header * to identify a potential JSON response. The default pattern handles * either text/json or application/json */ reCtypeJSON : /(application|text)\/json/i, /** * @cfg reCtypeXML * regexp test pattern applied to incoming response Content-Type header * to identify a potential JSON response. The default pattern handles * either text/json or application/json */ reCtypeXML : /(application|text)\/xml/i, /** private */ createResponseObject : function(o, callbackArg, isAbort, isTimeout) { var obj = { responseXML : null, responseText : '', responseStream : null, responseJSON : null, contentType : null, getResponseHeader : emptyFn, getAllResponseHeaders : emptyFn }; var headerObj = {}, headerStr = ''; if (isAbort !== true) { try { // to catch bad encoding problems here obj.responseJSON = o.conn.responseJSON || null; obj.responseStream = o.conn.responseStream || null; obj.contentType = o.conn.contentType || null; obj.responseText = o.conn.responseText; } catch (e) { o.status.isError = true; o.status.error = e; } try { obj.responseXML = o.conn.responseXML || null; } catch (ex) { } try { headerStr = ('getAllResponseHeaders' in o.conn ? o.conn.getAllResponseHeaders() : null ) || ''; var s; headerStr.split('\n').forEach( function(sHeader){ (s = sHeader.split(':')) && s.first() && (headerObj[s.first().trim().toLowerCase()] = (s.last()||'').trim()); }); } catch (ex1) { o.status.isError = true; // trigger future exception callback o.status.error = ex1; } finally{ obj.contentType = obj.contentType || headerObj['content-type'] || ''; } if ((o.status.isLocal || o.proxied) && typeof obj.responseText == 'string') { o.status.isOK = !o.status.isError && ((o.status.status = (!!obj.responseText.length) ? 200 : 404) == 200); if (o.status.isOK && ( (!obj.responseXML && this.reCtypeXML.test(obj.contentType )) || (obj.responseXML && obj.responseXML.childNodes.length === 0) ) ) { var xdoc = null; try { // ActiveX may be disabled if (window.ActiveXObject) { xdoc = new ActiveXObject("MSXML2.DOMDocument.3.0"); xdoc.async = false; xdoc.loadXML(obj.responseText); } else { var domParser = null; try { // Opera 9 will fail parsing non-XML content, so trap here. domParser = new DOMParser(); xdoc = domParser.parseFromString(obj.responseText,'application\/xml'); } catch (exP) { } finally { domParser = null; } } } catch (exd) { o.status.isError = true; o.status.error = exd; } obj.responseXML = xdoc; } if (obj.responseXML) { var parseBad = (obj.responseXML.documentElement && obj.responseXML.documentElement.nodeName == 'parsererror') || (obj.responseXML.parseError || 0) !== 0 || obj.responseXML.childNodes.length === 0; parseBad || (obj.contentType = headerObj['content-type'] = obj.responseXML.contentType || 'text\/xml'); } } if (o.options.isJSON || (this.reCtypeJSON && this.reCtypeJSON.test(headerObj['content-type'] || ""))) { try { Ext.isObject(obj.responseJSON) || (obj.responseJSON = Ext.isFunction( this.decodeJSON ) && Ext.isString(obj.responseText) ? this.decodeJSON(obj.responseText) : null); } catch (exJSON) { o.status.isError = true; // trigger future exception callback o.status.error = exJSON; } } } // isAbort? o.status.proxied = !!o.proxied; Ext.apply(obj, { tId : o.tId, status : o.status.status, statusText : o.status.statusText, contentType : obj.contentType || headerObj['content-type'], getResponseHeader : function(header){return headerObj[(header||'').trim().toLowerCase()];}, getAllResponseHeaders : function(){return headerStr;}, fullStatus : o.status, isPart : o.isPart || false }); o.parts && !o.isPart && (obj.parts = o.parts); defined(callbackArg) && (obj.argument = callbackArg); return obj; }, setDefaultPostHeader : function(contentType) { this.defaultPostHeader = contentType||''; }, /** * Toggle use of the DefaultXhrHeader ('Ext.basex') */ setDefaultXhrHeader : function(bool) { this.useDefaultXhrHeader = bool || false; }, request : function(method, uri, cb, data, options) { var O = options = Ext.apply({ async : this.async || false, headers : false, userId : null, password : null, xmlData : null, jsonData : null, queue : null, proxied : false, multiPart : false, xdomain : false }, options || {}); if (!this.events || this.fireEvent('request', method, uri, cb, data, O) !== false) { // Named priority queues if (!O.queued && (O.queue || (O.queue = this.queueAll || null)) ) { O.queue === true && (O.queue = {name:'q-default'}); var oq = O.queue; var qname = oq.name || oq , qm = this.queueManager; var q = qm.getQueue(qname) || qm.createQueue(oq); O.queue = q; O.queued = true; var req = [method, uri, cb, data, O]; req.active = true; q.add(req); return { tId : this.transactionId++, queued : true, request : req, options : O }; } options.onpart && (cb.onpart || (cb.onpart = Ext.isFunction(options.onpart) ? options.onpart.createDelegate(options.scope): null)); O.headers && forEach(O.headers, function(value, key) { this.initHeader(key, value, false); },this); var cType; // The Content-Type specified on options.headers always has priority over // a calculated value. if (cType = (this.headers ? this.headers['Content-Type'] || null : null)) { // remove to ensure only ONE is passed later.(per RFC) delete this.headers['Content-Type']; } if (O.xmlData) { cType || (cType = 'text/xml'); method = 'POST'; data = O.xmlData; } else if (O.jsonData) { cType || (cType = 'application/json; charset=utf-8'); method = 'POST'; data = Ext.isObject(O.jsonData) ? Ext.encode(O.jsonData) : O.jsonData; } if (data) { cType || (cType = this.useDefaultHeader ? this.defaultPostHeader : null); cType && this.initHeader('Content-Type', cType, false); } // options.method prevails over any derived method. return this.makeRequest(O.method || method, uri, cb, data, O); } return null; }, /** private */ getConnectionObject : function(uri, options) { var o, f; var tId = this.transactionId; options || (options = {}); try { if (f = options.proxied) { /* JSONP scriptTag Support */ o = { tId : tId, status : {isError : false}, proxied : true, // synthesize an XHR object conn : { el : null, send : function() { var doc = (f.target || window).document, head = doc.getElementsByTagName("head")[0]; if (head && this.el) { head.appendChild(this.el.dom); } }, abort : function() { this.readyState = 0; }, getAllResponseHeaders : emptyFn, getResponseHeader : emptyFn, onreadystatechange : null, onload : null, readyState : 0, status : 0, responseText : null, responseXML : null, responseJSON : null }, debug : f.debug, params : options.params || {}, cbName : f.callbackName || 'basexCallback' + tId, cbParam : f.callbackParam || null }; window[o.cbName] = o.cb = function(content, request) { content && typeof(content)=='object' && (this.responseJSON = content); this.responseText = content || null; this.readyState = 4; this.status = !!content ? 200 : 404; Ext.isFunction(this.onreadystatechange) && this.onreadystatechange(); window[o.cbName] = undefined; try { delete window[o.cbName]; } catch (ex) {} o.debug || this.el.remove(); this.el = null; Ext.isFunction(this.onload) && this.onload(); }.createDelegate(o.conn, [o], true); o.conn.open = function() { if (o.cbParam) { o.params[o.cbParam] = o.cbName; } var params = Ext.urlEncode(o.params) || null; this.el = monitoredNode(f.tag || 'script', { type : "text/javascript", src : params ? uri + (uri.indexOf("?") > -1 ? "&" : "?") + params : uri, charset : f.charset || options.charset || null }, null, f.target, true); //defer head insertion until send method this.readyState = 1; // show CallInProgress Ext.isFunction(this.onreadystatechange) && this.onreadystatechange(); }; options.async = true; // force timeout support } else { o = this.createXhrObject(tId, options); } if (o) { this.transactionId++; } } catch (ex3) { o && (o.status.isError = !!(o.status.error = ex3)); } finally { return o; } }, /** private */ makeRequest : function(method, uri, callback, postData, options) { var o; if (o = this.getConnectionObject(uri, options)) { o.options = options; var r = o.conn; try { if(o.status.isError){ throw o.status.error }; A.activeRequests++; r.open(method.toUpperCase(), uri, options.async, options.userId, options.password); ('onreadystatechange' in r) && (r.onreadystatechange = this.onStateChange.createDelegate(this, [o, callback, 'readystate'], 0)); ('onload' in r) && (r.onload = this.onStateChange.createDelegate(this, [o, callback, 'load', 4], 0)); ('onprogress' in r) && (r.onprogress = this.onStateChange.createDelegate(this, [o, callback, 'progress'], 0)); //IE8/other? evolving timeout callback support if(callback && callback.timeout){ ('timeout' in r) && (r.timeout = callback.timeout); ('ontimeout' in r) && (r.ontimeout = this.abort.createDelegate(this, [o, callback, true], 0)); ('ontimeout' in r) || // Timers for syncro calls won't work here, as it's a blocking call (options.async && (this.timeout[o.tId] = window.setInterval( function() {A.abort(o, callback, true); }, callback.timeout))); } if (this.useDefaultXhrHeader && !options.xdomain) { this.defaultHeaders['X-Requested-With'] || this.initHeader('X-Requested-With', this.defaultXhrHeader, true); } this.setHeaders(o); if (!this.events || this.fireEvent('beforesend', o, method, uri, callback, postData, options) !== false) { r.send(postData || null); } } catch (exr) { o.status.isError = true; o.status.error = exr; } if(o.status.isError ) { return Ext.apply(o, this.handleTransactionResponse(o, callback)); } options.async || this.onStateChange(o, callback, 'load'); return o; } }, abort : function(o, callback, isTimeout) { if (o && o.queued && o.request) { o.request.active = o.queued = false; this.events && this.fireEvent('abort', o, callback); return true; } else if (o && this.isCallInProgress(o)) { if (!this.events || this.fireEvent(isTimeout ? 'timeout' : 'abort', o, callback)!== false){ Ext.isFunction(o.conn.abort) && o.conn.abort(); o.status.isAbort = !(o.status.isTimeout = isTimeout || false); this.handleTransactionResponse(o, callback, o.status.isAbort, isTimeout); } return true; } else { return false; } }, isCallInProgress : function(o) { // if there is a connection and readyState is supported, and not 0 or 4 if( o && o.conn ){ if('readyState' in o.conn && {0:true,4:true}[o.conn.readyState]){ return false; } return true; } return false; }, /** * Clears the Browser authentication Cache * @param {String} url {optional) reset url for non-IE browsers * @return void */ clearAuthenticationCache : function(url) { try { if (Ext.isIE) { // IE clear HTTP Authentication, (but ALL realms though) document.execCommand("ClearAuthenticationCache"); } else { // create an xmlhttp object var xmlhttp; if (xmlhttp = new XMLHttpRequest()) { // prepare invalid credentials xmlhttp.open("GET", url || '/@@', true, "logout", "logout"); // send the request to the server xmlhttp.send(""); // abort the request xmlhttp.abort.defer(100, xmlhttp); } } } catch (e) {} // There was an error }, // private initHeader : function(label, value) { (this.headers = this.headers || {})[label] = value; }, /** @private * General readyStateChange multiPart handler */ onStateChange : function(o, callback, mode) { if(!o.conn){ return; } var C = o.conn, readyState = ('readyState' in C ? C.readyState : 0); if(mode === 'load' || readyState > 2){ var ct; try{ct = C.contentType || C.getResponseHeader('Content-Type') || '';} catch(exRs){ } if(ct && /multipart\//i.test(ct)){ var r = null, boundary = ct.split('"')[1], kb = '--' + boundary; o.multiPart = true; try{r = C.responseText;}catch(ers){} var p = r ? r.split(kb) : null; if(p){ o.parts || (o.parts = []); p.shift(); p.pop(); forEach( Array.slice(p, o.parts.length), //skip parts already parsed function(newPart){ var content = newPart.split('\n\n'); var H = (content[0] ? content[0] : '') + '\n'; o.parts.push(this.handleTransactionResponse( Ext.apply( Ext.clone(o),{ boundary : boundary, conn : { //synthetic conn structure for each part status : 200, responseText : (content[1]||'').trim(), getAllResponseHeaders : function(){ return H.split('\n').filter( function(value){return !!value;}).join('\n'); } }, isPart : true }), callback)); },this); } } } (readyState === 4 || mode === 'load') && A.handleTransactionResponse(o, callback); this.events && this.fireEvent.apply(this, ['readystatechange'].concat(Array.slice(arguments, 0))); }, setHeaders:function(o){ //Some XDomain implementations (IE8) do not support setting headers if(o.conn && 'setRequestHeader' in o.conn){ this.defaultHeaders && forEach(this.defaultHeaders, function(value, key){ o.conn.setRequestHeader(key, value);}); this.headers && forEach(this.headers, function(value, key){o.conn.setRequestHeader(key, value);}); } this.headers = {}; this.hasHeaders = false; }, resetDefaultHeaders:function() { delete this.defaultHeaders; this.defaultHeaders = {}; this.hasDefaultHeaders = false; }, //These are only current versions of ActiveX XHR that support multipart responses activeXMultipart : [ 'MSXML2.XMLHTTP.6.0', 'MSXML3.XMLHTTP' ], activeX:[ 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP' ] }); /** * private -- <script and link> tag support */ var monitoredNode = function(tag, attributes, callback, context, deferred) { attributes = Ext.apply({}, attributes || {}); context || (context = window); var node = null, doc = context.document, head = doc.getElementsByTagName("head")[0]; if (doc && head && (node = Ext.get(doc.createElement(tag)))) { var ndom = Ext.getDom(node); ndom && forEach(attributes, function(value, attrib) { value && (attrib in ndom) && ndom.setAttribute(attrib, value); }); if (callback) { var cb = (callback.success || callback).createDelegate(callback.scope || null, [callback], true); Ext.capabilities.isEventSupported('load', tag) ? node.on("load", cb) : cb.defer(50); } deferred || head.appendChild(ndom); } return node; }; if (Ext.util.Observable) { Ext.apply(A, { events : { request : true, beforesend : true, response : true, exception : true, abort : true, timeout : true, readystatechange : true, beforequeue : true, queue : true, queueempty : true }, /** * onStatus define eventListeners for a single (or array) of * HTTP status codes. */ onStatus : function(status, fn, scope, options) { var args = Array.slice(arguments, 1); status = new Array().concat(status || new Array()); forEach(status, function(statusCode) { statusCode = parseInt(statusCode, 10); if (!isNaN(statusCode)) { var ev = 'status:' + statusCode; this.events[ev] || (this.events[ev] = true); this.on.apply(this, [ev].concat(args)); } }, this); }, /** * unStatus unSet eventListeners for a single (or array) of * HTTP status codes. */ unStatus : function(status, fn, scope, options) { var args = Array.slice(arguments, 1); status = new Array().concat(status || new Array()); forEach(status, function(statusCode) { statusCode = parseInt(statusCode, 10); if (!isNaN(statusCode)) { var ev = 'status:' + statusCode; this.un.apply(this, [ev].concat(args)); } }, this); } }, new Ext.util.Observable()); Ext.hasBasex = true; } // Array, object iteration and clone support Ext.stopIteration = { stopIter : true }; Ext.applyIf(Array.prototype, { /* * Fix for IE, Opera < 9.5, which does not seem to include the map * function on Array's */ map : function(fun, scope) { var len = this.length; if (typeof fun != "function") { throw new TypeError(); } var res = new Array(len); for (var i = 0; i < len; i++) { if (i in this) { res[i] = fun.call(scope || this, this[i], i, this); } } return res; }, /** * Return true of the passed Function test true of ANY array elememt. * (added for IE) */ some : function(fn){ var f= Ext.isFunction(fn) ? fn : function(){}; var i=0, l=this.length, test=false; while(i<l && !(test=!!f(this[i++]))){} return test; }, /** * Return true of the passed Function test true of ALL array elememts. * (added for IE) */ every : function(fn){ var f= Ext.isFunction(fn) ? fn : function(){}; var i=0, l=this.length, test=true; while(i<l && (test=!!f(this[i++]))){} return test; }, include : function(value, deep) { // Boolean: is value present // in Array // use native indexOf if available if (!deep && typeof this.indexOf == 'function') { return this.indexOf(value) != -1; } var found = false; try { this.forEach(function(item, index) { if (found = (deep ? (item.include ? item.include(value, deep) : (item === value)) : item === value)) { throw Ext.stopIteration; } }); } catch (exc) { if (exc != Ext.stopIteration) { throw exc; } } return found; }, // Using iterFn, traverse the array, push the current element // value onto the // result if the iterFn returns true filter : function(iterFn, scope) { var a = new Array(); iterFn || (iterFn = function(value) { return value; }); this.forEach(function(value, index) { iterFn.call(scope, value, index) && a.push(value); }); return a; }, compact : function(deep) { // Remove null, undefined array // elements var a = new Array(); this.forEach(function(v) { (v === null || v === undefined) || a.push(deep && Ext.isArray(v) ? v.compact() : v); }, this); return a; }, flatten : function() { // flatten: [1,2,3,[4,5,6]] -> // [1,2,3,4,5,6] var a = new Array(); this.forEach(function(v) { Ext.isArray(v) ? (a = a.concat(v)) : a.push(v); }, this); return a; }, indexOf : function(o){ for (var i = 0, len = this.length; i < len; i++){ if(this[i] == o) return i; } return -1; }, lastIndexOf : function(val){ var i= this.length-1; while(i>-1 && this[i] != val){i--;} return i; }, unique : function(sorted /* sort optimization */, exact) { // unique: // [1,3,3,4,4,5] // -> // [1,3,4,5] var a = new Array(); this.forEach(function(value, index) { if (0 == index || (sorted ? a.last() != value : !a.include(value, exact))) { a.push(value); } }, this); return a; }, // search array values based on regExpression pattern returning // test (and optionally execute function(value,index) on test // before returned) grep : function(rePattern, iterFn, scope) { var a = new Array(); iterFn || (iterFn = function(value) { return value; }); var fn = scope ? iterFn.createDelegate(scope) : iterFn; if (typeof rePattern == 'string') { rePattern = new RegExp(rePattern); } rePattern instanceof RegExp && this.forEach(function(value, index) { rePattern.test(value) && a.push(fn(value, index)); }); return a; }, first : function() { return this[0]; }, last : function() { return this[this.length - 1]; }, clear : function() { this.length = 0; }, // return an array element selected at random atRandom : function(defValue) { var r = Math.floor(Math.random() * this.length); return this[r] || defValue; }, clone : function(deep) { if (!deep) {return this.concat();} var length = this.length || 0, t = new Array(length); while (length--) { t[length] = Ext.clone(this[length], true); } return t; }, /* * Array forEach Iteration based on previous work by: Dean Edwards * (http://dean.edwards.name/weblog/2006/07/enum/) Gecko already * supports forEach for Arrays : see * http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Objects:Array:forEach */ forEach : function( block, scope) { Array.forEach(this, block, scope); } }); // globally resolve forEach enumeration window.forEach = function(object, block, context, deep) { context = context || object; if (object) { if (typeof block != "function") { throw new TypeError(); } var resolve = Object; if (object instanceof Function) { // functions have a "length" property resolve = Function; } else if (object.forEach instanceof Function) { // the object implements a custom forEach method so use that return object.forEach(block, context); } else if (typeof object == "string") { // the object is a string resolve = String; } else if (Ext.isNumber(object.length)) { // the object is array-like resolve = Array; } return resolve.forEach(object, block, context, deep); } }; /** * * Primary clone Function */ Ext.clone = function(obj, deep) { if (obj === null || obj === undefined) {return obj;} if (Ext.isFunction(obj.clone)) { return obj.clone(deep); } else if(Ext.isFunction(obj.cloneNode)){ return obj.cloneNode(deep); } var o={}; forEach(obj, function(value, name, objAll){ o[name] = (value === objAll ? // reference to itself? o : deep ? Ext.clone(value, true) : value); }, obj, deep); return o; }; var slice = Array.prototype.slice; var filter = Array.prototype.filter; Ext.applyIf(Array,{ // Permits: Array.slice(arguments, 1); // mozilla already supports this slice: function(obj) { return slice.apply(obj, slice.call(arguments, 1)); }, //String filter iteration filter: function(obj, fn){ var t = obj && typeof obj == 'string' ? obj.split('') : []; return filter.call(t, fn); }, /* * Array forEach Iteration based on previous work by: Dean Edwards * (http://dean.edwards.name/weblog/2006/07/enum/) Gecko already * supports forEach for Arrays : see * http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Objects:Array:forEach */ forEach : function( collection, block, scope) { if (typeof block != "function") { throw new TypeError(); } for (var i = 0, l = collection.length; i < l; i++) { block.call(scope, collection[i], i, collection); } } }); //Add clone function to primitive prototypes Ext.applyIf(RegExp.prototype,{ clone : function() { return new RegExp(this); } }); Ext.applyIf(Date.prototype, { clone : function(deep){ return deep? new Date(this.getTime()) : this ; } }); Ext.applyIf(Boolean.prototype, { clone : function(){ return this == true; } }); Ext.applyIf(Number.prototype, { times : function(block, context){ var total = parseInt(this,10) || 0; for (var i=1; i <= total; ){ block.call(context, i++); } }, forEach : function(){ this.times.apply(this, arguments); }, clone : function(){ return (this)+ 0; } }); // character enumeration Ext.applyIf(String.prototype, { trim : function() { var re = /^\s+|\s+$/g; return function() { return this.replace(re, ""); }; }(), trimRight : function() { var re = /^|\s+$/g; return function() { return this.replace(re, ""); }; }(), trimLeft : function() { var re = /^\s+|$/g; return function() { return this.replace(re, ""); }; }(), clone : function() { return String(this)+''; }, forEach : function(block, context){ String.forEach(this, block,context); } }); var overload = function(pfn, fn ){ var f = typeof pfn == 'function' ? pfn : function(){}; var ov = f._ovl; //call signature hash if(!ov){ ov = { base: f}; ov[f.length|| 0] = f; f= function(){ //the proxy stub var o = arguments.callee._ovl; var fn = o[arguments.length] || o.base; //recursion safety return fn && fn != arguments.callee ? fn.apply(this,arguments): undefined; }; } var fnA = [].concat(fn); for(var i=0,l=fnA.length; i<l; i++){ //ensures no duplicate call signatures, but last in rules! ov[fnA[i].length] = fnA[i]; } f._ovl= ov; return f; }; Ext.applyIf(Ext,{ overload : overload( overload, [ function(fn){ return overload(null, fn);}, function(obj, mname, fn){ return obj[mname] = overload(obj[mname],fn);} ]), isIterable : function(obj){ //check for array or arguments if( obj === null || obj === undefined )return false; if(Ext.isArray(obj) || !!obj.callee || Ext.isNumber(obj.length) ) return true; return !!((/NodeList|HTMLCollection/i).test(OP.toString.call(obj)) || //check for node list type //NodeList has an item and length property //IXMLDOMNodeList has nextNode method, needs to be checked first. obj.nextNode || obj.item || false); }, isArray : function(obj){ return OP.toString.apply(obj) == '[object Array]'; }, isObject:function(obj){ return (obj !== null) && typeof obj == 'object'; }, isNumber: function(obj){ return typeof obj == 'number' && isFinite(obj); }, isBoolean: function(obj){ return typeof obj == 'boolean'; }, isDocument : function(obj){ return OP.toString.apply(obj) == '[object HTMLDocument]' || (obj && obj.nodeType === 9); }, isElement : function(obj){ return obj && Ext.type(obj)== 'element'; }, isEvent : function(obj){ return OP.toString.apply(obj) == '[object Event]' || (Ext.isObject(obj) && !Ext.type(obj.constructor) && (window.event && obj.clientX && obj.clientX === window.event.clientX)); }, isFunction: function(obj){ return OP.toString.apply(obj) == '[object Function]'; }, isString : function(obj){ return typeof obj == 'string'; }, isDefined: defined }); /** * @class Ext * @singleton * @constructor * @description Ext Adapter extensions */ /** * @class Ext.capabilities * @singleton * @desc Describes Detected Browser capabilities. */ Ext.capabilities = { /** * @property {Boolean} hasActiveX True if the Browser support (and is enabled) ActiveX. */ hasActiveX : !!window.ActiveXObject, /** * @property {Boolean} hasXDR True, if the Browser has Cross-Domain Ajax request capability. */ hasXDR : function(){ return (Ext.isIE && defined(window.XDomainRequest)) || Ext.isSafari4 || (Ext.isGecko && 'withCredentials' in new XMLHttpRequest()) ; }(), /** * @property {Boolean} hasFlash True if the Flash Browser plugin is installed. */ hasFlash : (function(){ //Check for ActiveX first because some versions of IE support navigator.plugins, just not the same as other browsers if(window.ActiveXObject){ try{ //try to create a flash instance new ActiveXObject("ShockwaveFlash.ShockwaveFlash"); return true; }catch(e){}; //If the try-catch fails, return false return false; }else if(navigator.plugins){ //Loop through all the plugins for(var i=0, length = navigator.plugins.length; i < length; i++){ //test to see if any plugin names contain the word flash, if so it must support it - return true if((/flash/gi).test(navigator.plugins[i].name)){ return true; } } //return false if no plugins match return false; } //Return false if ActiveX and nagivator.plugins are not supported return false; })(), /** * @property {Boolean} hasCookies True if the browser cookies are enabled/supported. */ hasCookies : !!navigator.cookieEnabled , /** * @property {Boolean} hasCanvas True if the browser has canvas Element support. */ hasCanvas : !!document.createElement("canvas").getContext, /** * @property {Boolean} hasSVG True if the browser has SVG support. */ hasSVG : !!(document.createElementNS && document.createElementNS('http://www.w3.org/2000/svg', 'svg').width), /** * @property {Boolean} hasXpath True if the browser has Xpath query support. */ hasXpath : !!document.evaluate, hasBasex : true, /** * Determine whether a specified DOMEvent is supported by a given HTMLElement or Object. * @param {String} type The eventName (without the 'on' prefix) * @param {HTMLElement/Object/String} testEl (optional) A specific HTMLElement/Object to test against, otherwise a tagName to test against. * based on the passed eventName is used, or DIV as default. * @return {Boolean} True if the passed object supports the named event. */ isEventSupported : function(evName, testEl){ var TAGNAMES = { 'select':'input','change':'input', 'submit':'form','reset':'form', 'error':'img','load':'img','abort':'img' }, //Cached results cache = {}, //Get a tokenized string of the form nodeName:type getKey = function(type, el){ var tEl = Ext.getDom(el); return (tEl ? (Ext.isElement(tEl) || Ext.isDocument(tEl) ? tEl.nodeName.toLowerCase() : el.self ? '#window' : el || '#object') : el || 'div') + ':' + type; }; return function (evName, testEl) { var el, isSupported = false; var eventName = 'on' + evName; var tag = (testEl ? testEl : TAGNAMES[evName]) || 'div'; var key = getKey(evName, tag); if(key in cache){ //Use a previously cached result if available return cache[key]; } el = Ext.isString(tag) ? document.createElement(tag): testEl; isSupported = (!!el && (eventName in el)); isSupported || (isSupported = window.Event && !!(String(evName).toUpperCase() in window.Event)); if (!isSupported && el) { el.setAttribute && el.setAttribute(eventName, 'return;'); isSupported = Ext.isFunction(el[eventName]); } //save the cached result for future tests cache[key] = isSupported; el = null; return isSupported; }; }() };})(); // enumerate custom class properties (not prototypes unless protos==true) // usually only called by the global forEach function Ext.applyIf(Function.prototype, { forEach : function( object, block, context, protos) { if(object){ var key; for (key in object) { (!!protos || object.hasOwnProperty(key)) && block.call(context||object, object[key], key, object); } } }, clone : function(deep){ return this;} });
同步方式请求：
var conn = Ext.lib.Ajax.getConnectionObject().conn;
conn.open("GET", 'your url',false);
conn.send(null);
alert(conn.responseText);
或者
var conn = Ext.lib.Ajax.getConnectionObject().conn;
conn.open("POST", url, false);
conn.send("发送到服务器端的信息");
data = conn.responseText;
alert(data);
关键是要设置false这个参数
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