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') 

• Jared Smith: Are you json.loads ing the string you get in Python? How are you getting it?
• echo3: @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)
• Jared Smith: 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: 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?
• Chandu: 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?

Answer 1

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