update sources API

src/c3nav/mapdata/api.py

@@ -224,6 +224,4 @@ class SourceViewSet(MapdataViewSet):
 
     def _image(self, request, pk=None):
         source = self.get_object()
-        response = HttpResponse(content_type=mimetypes.guess_type(source.name)[0])
-        response.write(source.image)
-        return response
+        return HttpResponse(open(source.filepath, 'rb'), content_type=mimetypes.guess_type(source.name)[0])

src/c3nav/mapdata/models/source.py

@@ -1,3 +1,6 @@
+import os
+
+from django.conf import settings
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 
@@ -15,6 +18,10 @@ class Source(BoundsMixin, models.Model):
         verbose_name_plural = _('Sources')
         default_related_name = 'sources'
 
+    @property
+    def filepath(self):
+        return os.path.join(settings.SOURCES_ROOT, self.name)
+
     @property
     def title(self):
         return self.name