Extensions Docs Server: Apps samples page

chrome/common/extensions/docs/server2/memcache_url_fetcher.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.
+
+from google.appengine.api import urlfetch
+import logging
+
+import appengine_memcache as memcache
+
+class MemcacheUrlFetcher(object):
+  """A wrapper around the App Engine urlfetch module that memcaches results.
+  """
+  def __init__(self, memcache, base_path):
+    self._memcache = memcache
+    self._base_path = base_path
+
+  def Fetch(self, url):
+    """Fetches a file synchronously, and memcaches the result for 60 seconds.
+    """
+    content = self._memcache.Get(url, memcache.MEMCACHE_URL_FETCHER)
+    if content is not None:
+      return content
+    content = urlfetch.fetch(self._base_path + '/' + url).content
+    try:
+      self._memcache.Set(url, content, memcache.MEMCACHE_URL_FETCHER)
+    except Exception as e:
+      logging.info(e)
+    return content