Javascript 如何在ExtJS4中将beforerequest事件添加到ajax请求中？

如何在Extjs4中将beforerequest和requestcomplete事件添加到特定的ajax请求中

问候

Ext.Ajax.on("beforerequest", function(){
        console.info("beforerequest");
    });
Ext.Ajax.on("requestcomplete", function(){
        console.info("requestcomplete");
    });

Ext.Ajax.request({
    url: 'get-nodes.php',
    success: function(response){
        var text = response.responseText;
        console.info("response");
    }
});

或者，如果您在特定情况下需要，请尝试以下方法：

Ext.define('myAjax', {
    extend: 'Ext.data.Connection',
    singleton: true,
    constructor : function(config){
        this.callParent([config]);
        this.on("beforerequest", function(){
            console.info("beforerequest");
        });
        this.on("requestcomplete", function(){
            console.info("requestcomplete");
        });
    }
});

myAjax.request({
    url: 'get-nodes.php',
    success: function(response){
        console.info("response");
    }
});

---

第二个解决方案是我所寻找的，因为Ext.Ajax.on将evnt绑定到我提出的每个Ajax请求。