Tornado does not process an AJAX POST request with JSON in it

[Norbert Markowicz]

Hi guys,

 

I keep getting a no JSON object error in decoding a post requst in tornado:

...        raise ValueError("No JSON object could be decoded")
    ValueError: No JSON object could be decoded

E 130903 13:49:33 web:1514] 500 POST /testjsonpost (169.37.195.11) 32.00ms

 

My JS and tornado codes are below. What gives?

 

JS:

var person = {
            name: "9798679",
            address: "gagg",
            phone: "bbbbbbbbbbbb"
        }

   $.ajax({
            url: '/testjsonpost',
            type: 'post',
            dataType: 'json',
            success: function (data) {
                           alert("Success!");
            },
            data: person
        });

 

 

Tornado request handler:

class testJSONpost(tornado.web.RequestHandler):
    @asynchronous
    def post(self):
        data = json.loads(self.request.body)
        print data
        self.done()

 

Thanks in advance

[Meir Kriheli]

Please check what you're getting in request (body, arguments etc).

IIRC you should stringify the data. Something along the lines of:

$.ajax({
    type: "POST",
    url: "/testjsonpost",
    contentType: 'application/json',
    data: JSON.stringify(person),

    success: function (data) {
       alert("Success!");
    }

});

Some remarks:

1. Note that dataType is for processing the server response.
2. JSON.stringify may not be available on older versions of IE. See: http://caniuse.com/json
   

Cheers

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Meir Kriheli
http://meirkriheli.com

[Norbert Markowicz]

That did the trick Meir. Many thanks (as yes I agree i should have inspected the body contents myself)

 

Cheers