在mootools request.JSON中响应状态代码为http 200时调用onFailure

Question

I'm trying to switch from using the normal mootools request to request.JSON since I'm using exclusively json to communicate between the client and my server. I have a json request defined as:

    var jsonRequest = new Request.JSON({

        url: '/ServletContext/servlet', 
        onRequest: function(){
            // Just a class to make the cursor change to progress
            container.addClass('request-waiting');
        },
        // validationMessages should be a json object containing
        // messages on problems validating user input from server
        onSuccess: function(validationMessages){
            container.removeClass('request-waiting');
        },
        onFailure: function(requestObj){
            container.removeClass('request-waiting');
        }
    }).post({'context': context,'title': title});

I'm currently testing this in chrome, and the request is posting fine, and returning an http 200 with the contents I'm expecting; but the onFailure call back keeps getting called. I'm wondering why the onSuccess method is not being called.

The json string I'm sending back (intentionally) in the response is:

"{titleErrors: [], contextErrors: ['Context must be more than 40 characters']}"

I'm using mootools 1.3, and tomcat 7.

EDIT: After going up the mootools stack a bit, I found a call to json.decode and this is failing. I'm guessing that is because my json string is malformed. I haven't been using json that long, so that wouldn't surprise me but I would have thought that this would work. I'm looking into this but if you're able to eyeball my json and see the problem then that would be appreciated.

Answer 1

The json was malformed. I had this:

{titleErrors: [], contextErrors: ["Context must be more than 40 characters"]}

and it should have been this (note quotes around variable names):

{"titleErrors": [], "contextErrors": ["Context must be more than 40 characters"]}