styleguide/c++/chromium-cpp/main.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2014 The Chromium Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style license that can be
   5 # found in the LICENSE file.
   6 from google.appengine.api import memcache
   7 from google.appengine.api import urlfetch
   8 import webapp2
   9
  10 import base64
  11
  12 """A simple appengine app that hosts .html files in src/styleguide/c++ from
  13 chromium's git repo."""
  14
  15
  16 class MainHandler(webapp2.RequestHandler):
  17     def get(self):
  18         handler = GitilesMirrorHandler()
  19         handler.initialize(self.request, self.response)
  20         return handler.get("c++11.html")
  21
  22
  23 BASE = 'https://chromium.googlesource.com/chromium/src.git/' \
  24        '+/master/styleguide/c++/%s?format=TEXT'
  25 class GitilesMirrorHandler(webapp2.RequestHandler):
  26     def get(self, resource):
  27         if '..' in resource:  # No path traversal.
  28             self.response.write(':-(')
  29             return
  30
  31         url = BASE % resource
  32         contents = memcache.get(url)
  33         if not contents or self.request.get('bust'):
  34             result = urlfetch.fetch(url)
  35             if result.status_code != 200:
  36                 self.response.set_status(result.status_code)
  37                 self.response.write('http error %d' % result.status_code)
  38                 return
  39             contents = base64.b64decode(result.content)
  40             memcache.set(url, contents, time=5*60)  # seconds
  41
  42         if resource.endswith('.css'):
  43           self.response.headers['Content-Type'] = 'text/css'
  44         self.response.write(contents)
  45
  46
  47 app = webapp2.WSGIApplication([
  48     ('/', MainHandler),
  49     ('/(\S+\.(?:css|html))', GitilesMirrorHandler),
  50 ], debug=True)