Docserver: Add per-request profiling.

chrome/common/extensions/docs/server2/github_file_system.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import json
 import logging
 import os
 from StringIO import StringIO
 
 import appengine_blobstore as blobstore
@@ skipping 82 matching lines @@
       self._username, self._password = (USERNAME, PASSWORD)
 
     self._url = url
     self._fetcher = AppEngineUrlFetcher(url)
     self._blobstore = blobstore
     self._stat_object_store = object_store_creator.Create(GithubFileSystem)
     self._version = None
     self._GetZip(self.Stat(ZIP_KEY).version)
 
   def _GetZip(self, version):
-    blob = self._blobstore.Get(_MakeBlobstoreKey(version),
-                               blobstore.BLOBSTORE_GITHUB)
+    try:
+      blob = self._blobstore.Get(_MakeBlobstoreKey(version),
+                                 blobstore.BLOBSTORE_GITHUB)
+    except:

[Yoyo Zhou, 2013/12/13 05:15:21]

except SpecificTypeOfError: would be better.

[not at google - send to devlin, 2013/12/18 02:26:11]

Done.

+      self._zip_file = Future(value=None)
+      return
     if blob is not None:
       try:
         self._zip_file = Future(value=ZipFile(StringIO(blob)))
       except BadZipfile as e:
         self._blobstore.Delete(_MakeBlobstoreKey(version),
                                blobstore.BLOBSTORE_GITHUB)
         logging.error('Bad github zip file: %s' % e)
         self._zip_file = Future(value=None)
     else:
       self._zip_file = Future(
@@ skipping 84 matching lines @@
       self._stat_object_store.Set(path, version)
       return StatInfo(version)
     except StandardError as e:
       logging.warning(
           ('%s: got invalid or unexpected JSON from github. Response status ' +
            'was %s, content %s') % (e, result.status_code, result.content))
       return self._DefaultStat(path)
 
   def GetIdentity(self):
     return '%s@%s' % (self.__class__.__name__, StringIdentity(self._url))