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