taskqueue.py 文件源码

def extract_params(self):
    """Returns the parameters for this task.

    Returns:
      A dictionary of strings mapping parameter names to their values as
      strings. If the same name parameter has several values then the value will
      be a list of strings. For POST and PULL requests then the parameters are
      extracted from the task payload. For all other methods, the parameters are
      extracted from the url query string. An empty dictionary is returned if
      the task contains an empty payload or query string.

    Raises:
      ValueError: if the payload does not contain valid
        'application/x-www-form-urlencoded' data (for POST and PULL) or the url
        does not contain a valid query (all other methods).
    """
    if self.__method in ('PULL', 'POST'):

      query = self.__payload
    else:
      query = urlparse.urlparse(self.__relative_url).query

    p = {}
    if not query:
      return p

    for key, value in cgi.parse_qsl(
        query, keep_blank_values=True, strict_parsing=True):
      p.setdefault(key, []).append(value)

    for key, value in p.items():
      if len(value) == 1:
        p[key] = value[0]

    return p