Adds UNPREPEND_WWW, because why not?

pinaxcon/middleware.py

@@ -0,0 +1,34 @@
+import re
+import warnings
+
+from django import http
+from django.conf import settings
+from django.utils.deprecation import MiddlewareMixin
+
+class UnprependWWWMiddleware(MiddlewareMixin):
+    """ Unprepends www if necessary. """
+
+    response_redirect_class = http.HttpResponsePermanentRedirect
+
+    def process_request(self, request):
+        """
+        Rewrite the URL based on settings.UNPREPEND_WWW
+        """
+
+        unprepend_www = getattr(settings, "UNPREPEND_WWW", False)
+
+        if not unprepend_www:
+            return
+
+        # Check for a redirect based on settings.UNPREPEND_WWW
+        host = request.get_host()
+        must_unprepend = unprepend_www and host and host.lower().startswith('www.')
+        wwwless_host = host[4:]
+        redirect_url = ('%s://%s' % (request.scheme, wwwless_host)) if must_unprepend else ''
+
+        path = request.get_full_path()
+
+        # Return a redirect if necessary
+        if redirect_url or path != request.get_full_path():
+            redirect_url += path
+            return self.response_redirect_class(redirect_url)

pinaxcon/settings.py

@@ -15,12 +15,14 @@ DATABASES = {
     }
 }
 
+UNPREPEND_WWW = bool(os.environ.get("DJANGO_UNPREPEND_WWW", False))
+
 # HEROKU: Update database configuration with $DATABASE_URL.
 import dj_database_url
 db_from_env = dj_database_url.config()
 DATABASES['default'].update(db_from_env)
 
-ALLOWED_HOSTS = ["localhost", ".herokuapp.com", ".northbaypython.org"]
+ALLOWED_HOSTS = [".localhost", ".herokuapp.com", ".northbaypython.org"]
 
 # Local time zone for this installation. Choices can be found here:
 # http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
@@ -132,6 +134,7 @@ MIDDLEWARE_CLASSES = [
     "reversion.middleware.RevisionMiddleware",
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
     "ssl_redirect.middleware.SSLRedirectMiddleware",
+    "pinaxcon.middleware.UnprependWWWMiddleware",
 
 ]