appengine.py 文件源码

def callback_handler(self):
    """RequestHandler for the OAuth 2.0 redirect callback.

    Usage:
       app = webapp.WSGIApplication([
         ('/index', MyIndexHandler),
         ...,
         (decorator.callback_path, decorator.callback_handler())
       ])

    Returns:
      A webapp.RequestHandler that handles the redirect back from the
      server during the OAuth 2.0 dance.
    """
    decorator = self

    class OAuth2Handler(webapp.RequestHandler):
      """Handler for the redirect_uri of the OAuth 2.0 dance."""

      @login_required
      def get(self):
        error = self.request.get('error')
        if error:
          errormsg = self.request.get('error_description', error)
          self.response.out.write(
              'The authorization request failed: %s' % _safe_html(errormsg))
        else:
          user = users.get_current_user()
          decorator._create_flow(self)
          credentials = decorator.flow.step2_exchange(self.request.params)
          StorageByKeyName(
              CredentialsModel, user.user_id(), 'credentials').put(credentials)
          redirect_uri = _parse_state_value(str(self.request.get('state')),
                                            user)
          self.redirect(redirect_uri)

    return OAuth2Handler