Die build.py, Die: Part 1 (BranchUtility and SubversionFetcher)

chrome/common/extensions/docs/server2/urlfetch.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 logging
+
+from google.appengine.api import urlfetch
+from google.appengine.api import memcache
+
+DEFAULT_CACHE_TIME = 300
+
+class _FetchException(Exception):
+  """Thrown when status code is not 200.
+  """
+  def __init__(self, url):
+    Exception.__init__(self, 'Fetch exception from ' + url)
+
+def fetch(url):
+  result = memcache.get(url, namespace=__name__)
+  if result is not None:
+    return result
+  logging.info('Fetch cache miss: ' + url)
+
+  result = urlfetch.fetch(url)
+
+  if result.status_code != 200:
+    raise _FetchException(url)
+
+  memcache.add(url, result, DEFAULT_CACHE_TIME, namespace=__name__)
+  return result