当JSON返回“success”时，EXT.Ajax.request将成功：false(EXT.Ajax.request going to success when JSON returns “success” : false)

 我有这个EXT JS代码： 
 
Ext.Ajax.request({
                url     : "xxx",
                method  : "POST",
                params  : params,
                success : function(response) {
                            success();

                },
                failure : function(){
                            fail();
                }
        }); 
 
 url xxx返回这段JSON。 
 
{"success": false }
 
 出于某种原因，这永远不会失败。 它永远不会运行fail()方法，总是success() 。 出了什么问题？ 

I have this EXT JS code:
 
Ext.Ajax.request({
                url     : "xxx",
                method  : "POST",
                params  : params,
                success : function(response) {
                            success();

                },
                failure : function(){
                            fail();
                }
        }); 
 
The url xxx returns this piece of JSON. 
 
{"success": false }
 
For some reason this never goes into failure. It never runs the fail() method, always success(). What's going wrong?

原文：https://stackoverflow.com/questions/10717100