Ex的Ajax请求实现同步

Ext2,.x的Ajax实现同步

Ext.lib.Ajax.request = function(method, uri, cb, data, options) { if(options){ var hs = options.headers; if(hs){ for(var h in hs){ if(hs.hasOwnProperty(h)){ this.initHeader(h, hs[h], false); } } } if(options.xmlData){ if (!hs || !hs['Content-Type']){ this.initHeader('Content-Type', 'text/xml', false); } method = (method ? method : (options.method ? options.method : 'POST')); data = options.xmlData; }else if(options.jsonData){ if (!hs || !hs['Content-Type']){ this.initHeader('Content-Type', 'application/json', false); } method = (method ? method : (options.method ? options.method : 'POST')); data = typeof options.jsonData == 'object' ? Ext.encode(options.jsonData) : options.jsonData; } } return this["sync" in options ? "syncRequest" : "asyncRequest"](method, uri, cb, data);//这句制定调用的方法，如果sync传递了就调用syncRequest， 否则调用原来的方法asyncRequest}; syncRequest方法如下： Ext.lib.Ajax.syncRequest = function(method, uri, callback, postData) { var o = this.getConnectionObject(); if (!o) { return null; } else { o.conn.open(method, uri, false); if (this.useDefaultXhrHeader) { if (!this.defaultHeaders['X-Requested-With']) { this.initHeader('X-Requested-With', this.defaultXhrHeader, true); } } if(postData && this.useDefaultHeader && (!this.hasHeaders || !this.headers['Content-Type'])){ this.initHeader('Content-Type', this.defaultPostHeader); } if (this.hasDefaultHeaders || this.hasHeaders) { this.setHeader(o); } o.conn.send(postData || null); this.handleTransactionResponse(o, callback); return o; } }; //调用： Ext.Ajax.request({ url:'', scope:this, sync:true, success:function(){} });

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Ext3.x的Ajax实现同步

<script type="text/javascript" src="../extjs/ext-base.js"></script> <script type="text/javascript" src="../extjs/ext-basex.js"></script> //引入另一个JS文件,在附件中。

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