Make RSS feed URL scheme configurable.

feed_content/viewsets.py

 from django import forms
+from django.conf import settings
 from django.db.models import Q
 from base.viewsets import BaseTable, BaseViewset
 from crud.tables2_columns import CrudLinkColumn
 from django.shortcuts import reverse
 from django.utils.text import mark_safe
 import django_filters
+from urlparse import urlparse
 from . import models, views
 
 class FeedCategoryFilterSet(django_filters.FilterSet):
         order_by = ('name',)
 
     def render_rss_url(self, value, bound_column):
-        rss_url = bound_column._table.view.request.build_absolute_uri(reverse('rss:daily', kwargs={'feed_category_id': value})).replace('https://', 'http://')
+        request = bound_column._table.view.request
+        rss_url = reverse('rss:daily', kwargs={'feed_category_id': value})
+        if settings.FORCE_HTTP_RSS_URLS:
+            rss_url = 'http://%s%s' % (request.META['HTTP_HOST'].split(':')[0], rss_url)
+        else:
+            rss_url = request.build_absolute_uri(rss_url)
         return mark_safe('<a href="{0}">{0}</a>'.format(rss_url))
 
 class FeedCategoryForm(forms.ModelForm):

sms_feed/settings.py

 # sets this header and never allows it to be passed directly on from clients.
 SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
 
+FORCE_HTTP_RSS_URLS = False
+
 from settings_local import *