ajax post data from javascript to python

Question

Im trying to send a dict from javascript code to a python script via ajax through post. Heres the js:

    function foo(){
      context = {
         'var1': val1,
         'var2': val2
       }
       $.ajax({
         url:'/pyfoo'
         type: 'POST'
         data: context,
         success: function(){
            ...
         }
       });

I need to pull var1 and var2 from context in python but it doesn't come through. Any help would be appreciated.

I've tried a few thing in python:

def pyfoo():                                                                 
  data = json.loads('context')

Are you json.loads ing the string you get in Python? How are you getting it? — Jared Smith
– Jared Smith, Commented Mar 10, 2017 at 20:13
@JaredSmith, I've tried with json but I know very little about json. i get errors such as: json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0) — echo3
– echo3, Commented Mar 10, 2017 at 20:18
json is essentially just a format for serializing a string-keyed hashmap as a string. Meaning you have to deserialize it when it gets where its going. It also seems that its not getting encoded by the client code, try data: JSON.stringify(context), — Jared Smith
– Jared Smith, Commented Mar 10, 2017 at 20:20
Huh? json.loads('context')? Why are you referencing the name of a client side variable in your server side code? What HTTP server are you using? — Jared Smith
– Jared Smith, Commented Mar 10, 2017 at 20:22
see python function should take up the JSON response by using function handlers. def function(handler): print handler.get_arguments or so... let me know if I'm wrong. generally tornado/django frameworks takes something like this.. whenever ajax called that url handler function will simple do the work for you. What framework you are using? — Chandu
– Chandu, Commented Mar 10, 2017 at 20:24

corn3lius · Accepted Answer · 2017-03-10 21:49:21Z

3

From flask examples on their site :

def pyfoo() : 
    try:
        data = json.loads(request.data)
        print(data)
        return "Success" 200
    except ValueError:
        error('Unable to parse JSON data from request.')
        return "Error" 400

answered Mar 10, 2017 at 21:49

corn3lius

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