add embed info

app/item/views.py

@@ -59,6 +59,7 @@ def item(request, id):
     ):
         raise Http404
     context['item'] = item
+    context['url'] = request.build_absolute_uri(item.get_absolute_url())
     qs = item.comments.order_by('created')
     if not request.user.is_staff:
         q = ~Q(published=None)