taskqueue.py 文件源码

def __host_from_target(target):
    """Calculate the value of the host header from a target.

    Args:
      target: A string representing the target hostname or the constant
          DEFAULT_APP_VERSION.

    Returns:
      The string to be used as the host header, or None if it can not be
      determined.
    """
    default_hostname = app_identity.get_default_version_hostname()
    if default_hostname is None:



      return None

    if target is DEFAULT_APP_VERSION:
      return default_hostname
    else:


      return '%s.%s' % (target, default_hostname)