Feed error messages through a cors wrapper so that people on other domains can see what's happening.

endpoints/api/image.py

@@ -1,11 +1,10 @@
 import json
 
 from collections import defaultdict
-from flask.ext.restful import abort
 
 from app import app
 from endpoints.api import (resource, nickname, require_repo_read, RepositoryParamResource,
-                           format_date)
+                           format_date, NotFound)
 from data import model
 from util.cache import cache_control_flask_restful
 
@@ -64,7 +63,7 @@ class RepositoryImage(RepositoryParamResource):
     """ Get the information available for the specified image. """
     image = model.get_repo_image(namespace, repository, image_id)
     if not image:
-      abort(404)
+      raise NotFound()
 
     return image_view(image)
 
@@ -81,7 +80,7 @@ class RepositoryImageChanges(RepositoryParamResource):
     image = model.get_repo_image(namespace, repository, image_id)
 
     if not image:
-      abort(404)
+      raise NotFound()
 
     uuid = image.storage and image.storage.uuid
     diffs_path = store.image_file_diffs_path(namespace, repository, image_id, uuid)
@@ -90,4 +89,4 @@ class RepositoryImageChanges(RepositoryParamResource):
       response_json = json.loads(store.get_content(diffs_path))
       return response_json
     except IOError:
-      abort(404)
+      raise NotFound()