在Python中,是否有一种方法可以通过ICMP来ping服务器,如果服务器响应则返回TRUE,如果没有响应则返回FALSE ?


当前回答

编程ICMP ping很复杂,因为发送原始ICMP包需要更高的权限,而且调用ping二进制很难看。对于服务器监控,您可以使用TCP ping技术实现相同的结果:

# pip3 install tcping
>>> from tcping import Ping
# Ping(host, port, timeout)
>>> ping = Ping('212.69.63.54', 22, 60)
>>> ping.ping(3)
Connected to 212.69.63.54[:22]: seq=1 time=23.71 ms
Connected to 212.69.63.54[:22]: seq=2 time=24.38 ms
Connected to 212.69.63.54[:22]: seq=3 time=24.00 ms

在内部,这只是建立一个到目标服务器的TCP连接,并立即丢弃它,测量所消耗的时间。这个特殊的实现有点局限,因为它不能处理封闭的端口,但对于您自己的服务器来说,它工作得很好。

其他回答

#!/usr/bin/python3

import subprocess as sp

def ipcheck():
    status,result = sp.getstatusoutput("ping -c1 -w2 " + str(pop))
    if status == 0:
        print("System " + str(pop) + " is UP !")
    else:
        print("System " + str(pop) + " is DOWN !")


pop = input("Enter the ip address: ")
ipcheck()

使用这个,它在python 2.7上测试过,工作很好,如果成功,它返回以毫秒为单位的ping时间,失败时返回False。

import platform,subproccess,re
def Ping(hostname,timeout):
    if platform.system() == "Windows":
        command="ping "+hostname+" -n 1 -w "+str(timeout*1000)
    else:
        command="ping -i "+str(timeout)+" -c 1 " + hostname
    proccess = subprocess.Popen(command, stdout=subprocess.PIPE)
    matches=re.match('.*time=([0-9]+)ms.*', proccess.stdout.read(),re.DOTALL)
    if matches:
        return matches.group(1)
    else: 
        return False

我自己的方法结合了上面的几个答案:


def ping(host, show_log=False, package_count=1):
    ping.param = "-n" if platform.system().lower() == 'windows' else "-c"
    result = subprocess.run(['ping', ping.param, str(package_count), host],
                            stdout=subprocess.PIPE,
                            stderr=subprocess.STDOUT)
    output = result.stdout
    if show_log:
        print('return code: ', result.returncode)
        print(output.decode("utf-8"))
    return result.returncode == 0 and (b'TTL=' in output or b'ttl=' in output)

在OSX Monterey上测试。

我的版本的ping函数:

适用于Python 3.5及更高版本,适用于Windows和Linux。 在Windows上,如果ping命令失败且“目标主机不可达”,则返回False。 并且不显示任何输出,无论是弹出窗口还是命令行。

import platform, subprocess

def ping(host_or_ip, packets=1, timeout=1000):
    ''' Calls system "ping" command, returns True if ping succeeds.
    Required parameter: host_or_ip (str, address of host to ping)
    Optional parameters: packets (int, number of retries), timeout (int, ms to wait for response)
    Does not show any output, either as popup window or in command line.
    Python 3.5+, Windows and Linux compatible
    '''
    # The ping command is the same for Windows and Linux, except for the "number of packets" flag.
    if platform.system().lower() == 'windows':
        command = ['ping', '-n', str(packets), '-w', str(timeout), host_or_ip]
        # run parameters: capture output, discard error messages, do not show window
        result = subprocess.run(command, stdin=subprocess.DEVNULL, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL, creationflags=0x08000000)
        # 0x0800000 is a windows-only Popen flag to specify that a new process will not create a window.
        # On Python 3.7+, you can use a subprocess constant:
        #   result = subprocess.run(command, capture_output=True, creationflags=subprocess.CREATE_NO_WINDOW)
        # On windows 7+, ping returns 0 (ok) when host is not reachable; to be sure host is responding,
        # we search the text "TTL=" on the command output. If it's there, the ping really had a response.
        return result.returncode == 0 and b'TTL=' in result.stdout
    else:
        command = ['ping', '-c', str(packets), '-w', str(timeout), host_or_ip]
        # run parameters: discard output and error messages
        result = subprocess.run(command, stdin=subprocess.DEVNULL, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
        return result.returncode == 0

你想怎么用就怎么用。

对于python3,有一个非常简单方便的python模块ping3:(pip安装ping3,需要root权限)。

from ping3 import ping, verbose_ping
ping('example.com')  # Returns delay in seconds.
>>> 0.215697261510079666

这个模块还允许自定义一些参数。