INCR-146 [Python2 > Python3] (#20488)

* INCR-146: Run python-modernize on openedx/core/djangoapps/cors_csrf

* INCR-146: Disable pylint warning for import-error

openedx/core/djangoapps/cors_csrf/admin.py

@@ -2,6 +2,8 @@
 Manage cross-domain configuration.
 """
 
+from __future__ import absolute_import
+
 from config_models.admin import ConfigurationModelAdmin
 from django.contrib import admin
 

openedx/core/djangoapps/cors_csrf/authentication.py

@@ -1,6 +1,8 @@
 """
 Django Rest Framework Authentication classes for cross-domain end-points.
 """
+from __future__ import absolute_import
+
 from django.middleware.csrf import CsrfViewMiddleware
 from rest_framework import authentication
 

openedx/core/djangoapps/cors_csrf/decorators.py

@@ -1,4 +1,6 @@
 """Decorators for cross-domain CSRF. """
+from __future__ import absolute_import
+
 from django.views.decorators.csrf import ensure_csrf_cookie
 
 

openedx/core/djangoapps/cors_csrf/helpers.py

@@ -1,7 +1,9 @@
 """Helper methods for CORS and CSRF checks. """
+from __future__ import absolute_import
+
 import contextlib
 import logging
-import urlparse
+import six.moves.urllib.parse  # pylint: disable=import-error
 
 from django.conf import settings
 
@@ -24,7 +26,7 @@ def is_cross_domain_request_allowed(request):
 
     """
     referer = request.META.get('HTTP_REFERER')
-    referer_parts = urlparse.urlparse(referer) if referer else None
+    referer_parts = six.moves.urllib.parse.urlparse(referer) if referer else None
     referer_hostname = referer_parts.hostname if referer_parts is not None else None
 
     # Use CORS_ALLOW_INSECURE *only* for development and testing environments;

openedx/core/djangoapps/cors_csrf/middleware.py

@@ -42,6 +42,8 @@ CSRF cookie.
 
 """
 
+from __future__ import absolute_import
+
 import logging
 
 from django.conf import settings

openedx/core/djangoapps/cors_csrf/migrations/0001_initial.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 import django.db.models.deletion

openedx/core/djangoapps/cors_csrf/models.py

@@ -1,4 +1,6 @@
 """Models for cross-domain configuration. """
+from __future__ import absolute_import
+
 from config_models.models import ConfigurationModel
 from django.db import models
 from django.utils.translation import ugettext_lazy as _

openedx/core/djangoapps/cors_csrf/tests/test_authentication.py

@@ -1,4 +1,6 @@
 """Tests for the CORS CSRF version of Django Rest Framework's SessionAuthentication."""
+from __future__ import absolute_import
+
 from mock import patch
 
 from django.middleware.csrf import get_token

openedx/core/djangoapps/cors_csrf/tests/test_decorators.py

@@ -1,4 +1,6 @@
 """Tests for cross-domain CSRF decorators. """
+from __future__ import absolute_import
+
 import json
 import mock
 from django.http import HttpResponse

openedx/core/djangoapps/cors_csrf/tests/test_middleware.py

@@ -2,6 +2,8 @@
 Tests for the CORS CSRF middleware
 """
 
+from __future__ import absolute_import
+
 from mock import patch, Mock
 import ddt
 

openedx/core/djangoapps/cors_csrf/tests/test_views.py

@@ -1,5 +1,7 @@
 """Tests for cross-domain request views. """
 
+from __future__ import absolute_import
+
 import json
 import unittest
 

openedx/core/djangoapps/cors_csrf/views.py

@@ -1,4 +1,6 @@
 """Views for enabling cross-domain requests. """
+from __future__ import absolute_import
+
 import json
 import logging