Fixed 500 during image pull when content is missing on the FS.

closes pulp#555

CHANGES/555.bugfix

@@ -0,0 +1 @@
+Fixed 500 during image pull when content is missing on the FS.

pulp_container/app/registry.py

@@ -62,6 +62,10 @@ async def _dispatch(file, headers):
             The :class:`aiohttp.web.FileResponse` for the file.
 
         """
+        path = os.path.join(settings.MEDIA_ROOT, file.name)
+        if not os.path.exists(path):
+            raise PathNotResolved(path)
+
         full_headers = MultiDict()
 
         full_headers["Content-Type"] = headers["Content-Type"]
@@ -71,8 +75,6 @@ async def _dispatch(file, headers):
         full_headers["Content-Disposition"] = "attachment; filename={n}".format(
             n=os.path.basename(file.name)
         )
-
-        path = os.path.join(settings.MEDIA_ROOT, file.name)
         file_response = web.FileResponse(path, headers=full_headers)
         return file_response
 

pulp_container/app/schema_convert.py

@@ -323,4 +323,7 @@ def _get_manifest_dict(manifest):
 
 
 def _get_dict(artifact):
-    return json.load(artifact.file)
+    try:
+        return json.load(artifact.file)
+    except FileNotFoundError:
+        raise RuntimeError()