webapp2.py 文件源码

def get_all(self, argument_name, default_value=None):
        """Returns a list of query or POST arguments with the given name.

        We parse the query string and POST payload lazily, so this will be a
        slower operation on the first call.

        :param argument_name:
            The name of the query or POST argument.
        :param default_value:
            The value to return if the given argument is not present,
            None may not be used as a default, if it is then an empty
            list will be returned instead.
        :returns:
            A (possibly empty) list of values.
        """
        if self.charset and not six.PY3:
            argument_name = argument_name.encode(self.charset)

        if default_value is None:
            default_value = []

        param_value = self.params.getall(argument_name)

        if param_value is None or len(param_value) == 0:
            return default_value

        for i in six.moves.range(len(param_value)):
            if isinstance(param_value[i], cgi.FieldStorage):
                param_value[i] = param_value[i].value

        return param_value