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71 lines
2.1 KiB
Python
71 lines
2.1 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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import platform
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import socket
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import subprocess
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PORT_TIMEOUT = 5
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PING_TIMEOUT = 5
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def is_port_open(host: str, port: int) -> bool:
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"""
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Test if a given port in a host is open.
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"""
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# pylint: disable=invalid-name
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for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
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af, _, _, _, sockaddr = res
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s = socket.socket(af, socket.SOCK_STREAM)
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try:
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s.settimeout(PORT_TIMEOUT)
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s.connect(sockaddr)
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s.shutdown(socket.SHUT_RDWR)
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return True
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except OSError as _:
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continue
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finally:
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s.close()
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return False
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def is_hostname_valid(host: str) -> bool:
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"""
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Test if a given hostname can be resolved.
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"""
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try:
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socket.getaddrinfo(host, None)
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return True
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except socket.gaierror:
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return False
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def is_host_up(host: str) -> bool:
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"""
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Ping a host to see if it's up.
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Note that if we don't get a response the host might still be up,
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since many firewalls block ICMP packets.
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"""
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param = "-n" if platform.system().lower() == "windows" else "-c"
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command = ["ping", param, "1", host]
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try:
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output = subprocess.call(command, timeout=PING_TIMEOUT) # noqa: S603
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except subprocess.TimeoutExpired:
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return False
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return output == 0
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