for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
"""
syslog2irc.network
~~~~~~~~~~~~~~~~~~
:Copyright: 2007-2021 Jochen Kupperschmidt
:License: MIT, see LICENSE for details.
from dataclasses import dataclass
from enum import Enum
TransportProtocol = Enum('TransportProtocol', ['TCP', 'UDP'])
@dataclass(frozen=True)
class Port:
"""A network port."""
number: int
transport_protocol: TransportProtocol
def format_port(port: Port) -> str:
"""Return string representation for port."""
return f'{port.number}/{port.transport_protocol.name.lower()}'
def parse_port(value: str) -> Port:
"""Extract port number and protocol from string representation."""
tokens = value.split('/', maxsplit=1)
if len(tokens) != 2:
raise ValueError(f'Invalid port string "{value}"')
number_str = tokens[0]
try:
number = int(number_str)
except ValueError:
raise ValueError(f'Invalid port number "{number_str}"')
if number < 1 or number > 65535:
transport_protocol_str = tokens[1]
transport_protocol = TransportProtocol[transport_protocol_str.upper()]
except KeyError:
raise ValueError(
f'Unknown transport protocol "{transport_protocol_str}"'
)
return Port(number=number, transport_protocol=transport_protocol)
homeworkprod /
syslog2irc
