http.py 文件源码

def tunnel_patch(http):
  """Tunnel PATCH requests over POST.
  Args:
     http - An instance of httplib2.Http
         or something that acts like it.

  Returns:
     A modified instance of http that was passed in.

  Example:

    h = httplib2.Http()
    h = tunnel_patch(h, "my-app-name/6.0")

  Useful if you are running on a platform that doesn't support PATCH.
  Apply this last if you are using OAuth 1.0, as changing the method
  will result in a different signature.
  """
  request_orig = http.request

  # The closure that will replace 'httplib2.Http.request'.
  def new_request(uri, method='GET', body=None, headers=None,
                  redirections=httplib2.DEFAULT_MAX_REDIRECTS,
                  connection_type=None):
    """Modify the request headers to add the user-agent."""
    if headers is None:
      headers = {}
    if method == 'PATCH':
      if 'oauth_token' in headers.get('authorization', ''):
        logging.warning(
            'OAuth 1.0 request made with Credentials after tunnel_patch.')
      headers['x-http-method-override'] = "PATCH"
      method = 'POST'
    resp, content = request_orig(uri, method, body, headers,
                        redirections, connection_type)
    return resp, content

  http.request = new_request
  return http