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# -*- coding: utf-8 -*-
from django.test import TestCase
from django.http import HttpRequest, HttpResponse, HttpResponseForbidden
from django.contrib.csrf.middleware import CsrfMiddleware, _make_token, csrf_exempt
from django.conf import settings
def post_form_response():
resp = HttpResponse(content="""
<html><body><form method="POST"><input type="text" /></form></body></html>
""", mimetype="text/html")
return resp
def test_view(request):
return post_form_response()
class CsrfMiddlewareTest(TestCase):
_session_id = "1"
def _get_GET_no_session_request(self):
return HttpRequest()
def _get_GET_session_request(self):
req = self._get_GET_no_session_request()
req.COOKIES[settings.SESSION_COOKIE_NAME] = self._session_id
return req
def _get_POST_session_request(self):
req = self._get_GET_session_request()
req.method = "POST"
return req
def _get_POST_no_session_request(self):
req = self._get_GET_no_session_request()
req.method = "POST"
return req
def _get_POST_session_request_with_token(self):
req = self._get_POST_session_request()
req.POST['csrfmiddlewaretoken'] = _make_token(self._session_id)
return req
def _get_post_form_response(self):
return post_form_response()
def _get_new_session_response(self):
resp = self._get_post_form_response()
resp.cookies[settings.SESSION_COOKIE_NAME] = self._session_id
return resp
def _check_token_present(self, response):
self.assertContains(response, "name='csrfmiddlewaretoken' value='%s'" % _make_token(self._session_id))
def get_view(self):
return test_view
# Check the post processing
def test_process_response_no_session(self):
"""
Check the post-processor does nothing if no session active
"""
req = self._get_GET_no_session_request()
resp = self._get_post_form_response()
resp_content = resp.content # needed because process_response modifies resp
resp2 = CsrfMiddleware().process_response(req, resp)
self.assertEquals(resp_content, resp2.content)
def test_process_response_existing_session(self):
"""
Check that the token is inserted if there is an existing session
"""
req = self._get_GET_session_request()
resp = self._get_post_form_response()
resp_content = resp.content # needed because process_response modifies resp
resp2 = CsrfMiddleware().process_response(req, resp)
self.assertNotEqual(resp_content, resp2.content)
self._check_token_present(resp2)
def test_process_response_new_session(self):
"""
Check that the token is inserted if there is a new session being started
"""
req = self._get_GET_no_session_request() # no session in request
resp = self._get_new_session_response() # but new session started
resp_content = resp.content # needed because process_response modifies resp
resp2 = CsrfMiddleware().process_response(req, resp)
self.assertNotEqual(resp_content, resp2.content)
self._check_token_present(resp2)
def test_process_response_exempt_view(self):
"""
Check that no post processing is done for an exempt view
"""
req = self._get_POST_session_request()
resp = csrf_exempt(self.get_view())(req)
resp_content = resp.content
resp2 = CsrfMiddleware().process_response(req, resp)
self.assertEquals(resp_content, resp2.content)
# Check the request processing
def test_process_request_no_session(self):
"""
Check that if no session is present, the middleware does nothing.
to the incoming request.
"""
req = self._get_POST_no_session_request()
req2 = CsrfMiddleware().process_view(req, self.get_view(), (), {})
self.assertEquals(None, req2)
def test_process_request_session_no_token(self):
"""
Check that if a session is present but no token, we get a 'forbidden'
"""
req = self._get_POST_session_request()
req2 = CsrfMiddleware().process_view(req, self.get_view(), (), {})
self.assertEquals(HttpResponseForbidden, req2.__class__)
def test_process_request_session_and_token(self):
"""
Check that if a session is present and a token, the middleware lets it through
"""
req = self._get_POST_session_request_with_token()
req2 = CsrfMiddleware().process_view(req, self.get_view(), (), {})
self.assertEquals(None, req2)
def test_process_request_session_no_token_exempt_view(self):
"""
Check that if a session is present and no token, but the csrf_exempt
decorator has been applied to the view, the middleware lets it through
"""
req = self._get_POST_session_request()
req2 = CsrfMiddleware().process_view(req, csrf_exempt(self.get_view()), (), {})
self.assertEquals(None, req2)
def test_ajax_exemption(self):
"""
Check that AJAX requests are automatically exempted.
"""
req = self._get_POST_session_request()
req.META['HTTP_X_REQUESTED_WITH'] = 'XMLHttpRequest'
req2 = CsrfMiddleware().process_view(req, self.get_view(), (), {})
self.assertEquals(None, req2)
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