Fix blog rss image urls to be absolute

mhackspace/blog/feeds.py

@@ -1,4 +1,5 @@
-from django.contrib.syndication.views import Feed
+from django.contrib.syndication.views import Feed, add_domain
+from django.contrib.sites.shortcuts import get_current_site
 from django.utils import timezone
 
 from mhackspace.base.feeds import MediaRssFeed
@@ -11,8 +12,15 @@ class BlogFeed(Feed):
     feed_type = MediaRssFeed
     description = "The latest blog posts and news from the Maidstone Hackspace site"
 
+    def get_feed(self, obj, request):
+        self.current_site = get_current_site(request)
+        return super(BlogFeed, self).get_feed(obj, request)
+
     def items(self, category):
-        return Post.objects.select_related('author').filter(active=True, members_only=False, published_date__lte=timezone.now())[:20]
+        return Post.objects.select_related('author').filter(
+            active=True,
+            members_only=False,
+            published_date__lte=timezone.now())[:20]
 
     def item_title(self, post):
         return post.title
@@ -38,7 +46,10 @@ class BlogFeed(Feed):
 
     def item_extra_kwargs(self, post):
         return {
-            'thumbnail_url': post.image.full.url,
+            'thumbnail_url': add_domain(
+                domain=self.current_site.domain,
+                url=post.image.full.url,
+                secure=True),
             'thumbnail_width': post.image.full.width,
             'thumbnail_height': post.image.full.height,
         }
@@ -49,7 +60,11 @@ class BlogCategoryFeed(BlogFeed):
         return Category.objects.filter(slug=category).first()
 
     def items(self, category):
-        return Post.objects.select_related('author').filter(active=True, members_only=False, categories=category, published_date__lte=timezone.now())[:20]
+        return Post.objects.select_related('author').filter(
+            active=True,
+            members_only=False,
+            categories=category,
+            published_date__lte=timezone.now())[:20]
 
     def title(self, category):
         return "Maidstone Hackspace Blog: %s" % category.name