misc: add support for REQUEST_PROXIES settings (#20385)

chrono/agendas/models.py

@@ -19,6 +19,7 @@ import datetime
 import requests
 import vobject
 
+from django.conf import settings
 from django.contrib.auth.models import Group
 from django.core.exceptions import ValidationError
 from django.core.urlresolvers import reverse
@@ -426,7 +427,7 @@ class Desk(models.Model):
 
     def create_timeperiod_exceptions_from_remote_ics(self, url):
         try:
-            response = requests.get(url)
+            response = requests.get(url, proxies=settings.REQUESTS_PROXIES)
             response.raise_for_status()
         except requests.HTTPError as e:
             raise ICSError(_('Failed to retrieve remote calendar (HTTP error %s).') % e.response.status_code)

chrono/settings.py

@@ -145,6 +145,10 @@ MELLON_USERNAME_TEMPLATE = '{attributes[name_id_content]}'
 
 MELLON_IDENTITY_PROVIDERS = []
 
+# proxies argument passed to all python-request methods
+# (see http://docs.python-requests.org/en/master/user/advanced/#proxies)
+REQUESTS_PROXIES = None
+
 local_settings_file = os.environ.get('CHRONO_SETTINGS_FILE',
         os.path.join(os.path.dirname(__file__), 'local_settings.py'))
 if os.path.exists(local_settings_file):