How do I send JSON data to Django app via Python urllib?

Question

I am trying to send JSON data to my django web app using python urllib but with no luck. This is my code;

Python application:

url = "http://127.0.0.1:8000/web_app"
values = {'name':'Paul','age':12}
jdata = {'data':values}
data = urllib.urlencode(values)
req = urllib2.Request(url, data, {'Content-Type':'application/json'})
try:
   resp = urllib2.urlopen(req)
   the_result = resp.read()
except urllib2.HTTPError, e:
   return "Reques Failed!"

My Django Web App:

@csrf_exempt
def web_app(request):
     print "In My webapp"   # This never get printed!
     data = request.POST['data']
     return HttpResponse("Thankyou...")

The request seems not to be hitting the Django web_app function, because the first print in the function is not executed!

Added: note if i remove the data from the request in the urllib2.request then everything works as expected!!

What am i missing?

can you access the page in a browser?

murgatroid99
– murgatroid99

2012-05-18 14:17:44 +00:00
Commented May 18, 2012 at 14:17 — murgatroid99
– murgatroid99, Commented May 18, 2012 at 14:17

okm · Accepted Answer · 2012-05-18 15:50:53Z

2

What's your urlconf look like? If it looks like '^web_app/$' and APPEND_SLASH=True in settings, which is default, you need to use "http://127.0.0.1:8000/web_app/" (note the suffix slash). Or else Django would try to redirect /web_app to /web_app/ if there is no matching, then complains about redirecting a POST request.

Also, its meaningless to set 'Content-Type':'application/json' for HTTP request, you could set this and break the requirement of urllib2 by passing it a JSON-dumped string; but then you should parse request.body by yourself instead of using request.POST. application/json is normally for specifying the Content-Type of response.

answered May 18, 2012 at 15:50

okm

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1 Comment

gath Over a year ago

+1, i also had a bad malformed urlconf pattern, it was like this initially url(r'$', 'myapp.views.home') without the "^" in front of the $ sign. I changed it to look like r'^$' and added the suffix slash. Thanks

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