'Provides QUERY_STRING parameters as a dictionary'

@property
def params(self):

    if (self._params_cache is None):
        if ('QUERY_STRING' in self.environ):
            self._params_cache = dict(urllib.parse.parse_qsl(self.environ['QUERY_STRING'], True))
        else:
            self._params_cache = {}
    return self._params_cache
