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OpenStack Study: network_utils.py**** CubicPower OpenStack Study **** def parse_host_port(address, default_port=None): """ Interpret a string as a host:port pair. An IPv6 address MUST be escaped if accompanied by a port, because otherwise ambiguity ensues: 2001:db8:85a3::8a2e:370:7334 means both [2001:db8:85a3::8a2e:370:7334] and [2001:db8:85a3::8a2e:370]:7334. >>> parse_host_port('server01:80') ('server01', 80) >>> parse_host_port('server01') ('server01', None) >>> parse_host_port('server01', default_port=1234) ('server01', 1234) >>> parse_host_port('[::1]:80') ('::1', 80) >>> parse_host_port('[::1]') ('::1', None) >>> parse_host_port('[::1]', default_port=1234) ('::1', 1234) >>> parse_host_port('2001:db8:85a3::8a2e:370:7334', default_port=1234) ('2001:db8:85a3::8a2e:370:7334', 1234) """ if address[0] == '[': # Escaped ipv6 _host, _port = address[1:].split(']') host = _host if ':' in _port: port = _port.split(':')[1] else: port = default_port else: if address.count(':') == 1: host, port = address.split(':') else: # 0 means ipv4, >1 means ipv6. # We prohibit unescaped ipv6 addresses with port. host = address port = default_port return (host, None if port is None else int(port))
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