http_core.py 文件源码

def get_headers(http_response):
  """Retrieves all HTTP headers from an HTTP response from the server.

  This method is provided for backwards compatibility for Python2.2 and 2.3.
  The httplib.HTTPResponse object in 2.2 and 2.3 does not have a getheaders
  method so this function will use getheaders if available, but if not it
  will retrieve a few using getheader.
  """
  if hasattr(http_response, 'getheaders'):
    return http_response.getheaders()
  else:
    headers = []
    for header in (
        'location', 'content-type', 'content-length', 'age', 'allow',
        'cache-control', 'content-location', 'content-encoding', 'date',
        'etag', 'expires', 'last-modified', 'pragma', 'server',
        'set-cookie', 'transfer-encoding', 'vary', 'via', 'warning',
        'www-authenticate', 'gdata-version'):
      value = http_response.getheader(header, None)
      if value is not None:
        headers.append((header, value))
    return headers