Parse request path and return GET-vars

		:return: None or dictionary of names and tuples of values

def get_vars(self):
		""" Parse request path and return GET-vars

		:return: None or dictionary of names and tuples of values
		"""
		if self.method() != 'GET':
			raise RuntimeError('Unable to return get vars for non-get method')
		re_search = WWebRequestProto.get_vars_re.search(self.path())
		if re_search is not None:
			return urllib.parse.parse_qs(re_search.group(1), keep_blank_values=1)