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

在四处寻找之后,我最终编写了自己的ping模块,该模块旨在监视大量地址,是异步的,并且不使用大量系统资源。你可以在这里找到它:https://github.com/romana/multi-ping/它是Apache授权的,所以你可以在你的项目中以任何你认为合适的方式使用它。

实施我自己的方法的主要原因是其他方法的限制:

这里提到的许多解决方案都需要将exec输出到命令行实用程序。如果您需要监控大量的IP地址,这是非常低效和资源消耗的。 其他人提到了一些较老的python ping模块。我看了这些,最后,他们都有这样或那样的问题(比如没有正确设置数据包id),不能处理大量地址的ping-ing。

其他回答

我有类似的要求,所以我实现它如下所示。它在Windows 64位和Linux上进行了测试。

import subprocess
def systemCommand(Command):
    Output = ""
    Error = ""     
    try:
        Output = subprocess.check_output(Command,stderr = subprocess.STDOUT,shell='True')
    except subprocess.CalledProcessError as e:
        #Invalid command raises this exception
        Error =  e.output 

    if Output:
        Stdout = Output.split("\n")
    else:
        Stdout = []
    if Error:
        Stderr = Error.split("\n")
    else:
        Stderr = []

    return (Stdout,Stderr)

#in main
Host = "ip to ping"
NoOfPackets = 2
Timeout = 5000 #in milliseconds
#Command for windows
Command = 'ping -n {0} -w {1} {2}'.format(NoOfPackets,Timeout,Host)
#Command for linux 
#Command = 'ping -c {0} -w {1} {2}'.format(NoOfPackets,Timeout,Host)
Stdout,Stderr = systemCommand(Command)
if Stdout:
   print("Host [{}] is reachable.".format(Host))
else:
   print("Host [{}] is unreachable.".format(Host))

当IP不可达时,subprocess.check_output()将引发异常。额外的验证可以通过从输出行“Packets: Sent = 2, Received = 2, Lost = 0 (0% loss)”中提取信息来完成。

import os #to get clear screen
import subprocess as sp #to get system ping
os.system("clear") #clear screen
print('Wait or Press Ctrl+Z to Terminate\n') #notice to terminate or wait
for i in range(255): #0 to 255 loop
    ip='192.168.1.'+str(i) #concatenating str and int
    s,r=sp.getstatusoutput("ping -c1 -w2 " + ip) #ping and store status in s
    if s==0: #if status is 0 equal to pass
        print(ip+" is UP ✓ ") #output
    else: #if status is not 0 equal to fail
        pass #skip and try next ip from loop

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。

我使用这篇文章中回答的想法,但只使用更新的推荐子进程模块和python3:

import subprocess
import platform

operating_sys = platform.system()
nas = '192.168.0.10'

def ping(ip):
    # ping_command = ['ping', ip, '-n', '1'] instead of ping_command = ['ping', ip, '-n 1'] for Windows
    ping_command = ['ping', ip, '-n', '1'] if operating_sys == 'Windows' else ['ping', ip, '-c 1']
    shell_needed = True if operating_sys == 'Windows' else False

    ping_output = subprocess.run(ping_command,shell=shell_needed,stdout=subprocess.PIPE)
    success = ping_output.returncode
    return True if success == 0 else False

out = ping(nas)
print(out)

我需要一个更快的ping扫描,我不想使用任何外部库,所以我决定使用内置的asyncio来实现并发。

此代码需要python 3.7+,仅在Linux上制作和测试。它不能在Windows上工作,但我相信你可以很容易地将其更改为在Windows上工作。

我不是asyncio方面的专家,但我使用了这篇很棒的文章,用并发性加速你的Python程序,我想出了这些代码行。我试图使它尽可能简单,所以很可能您需要添加更多的代码来满足您的需求。

它不会返回true或false,我认为让它打印响应ping请求的IP会更方便。我认为这是相当快的,在近10秒内ping 255个ip。

#!/usr/bin/python3

import asyncio

async def ping(host):
    """
    Prints the hosts that respond to ping request
    """
    ping_process = await asyncio.create_subprocess_shell("ping -c 1 " + host + " > /dev/null 2>&1")
    await ping_process.wait()

    if ping_process.returncode == 0:
        print(host)
    return 


async def ping_all():
    tasks = []

    for i in range(1,255):
        ip = "192.168.1.{}".format(i)
        task = asyncio.ensure_future(ping(ip))
        tasks.append(task)

    await asyncio.gather(*tasks, return_exceptions = True)

asyncio.run(ping_all())

样例输出:

192.168.1.1
192.168.1.3
192.168.1.102
192.168.1.106
192.168.1.6

请注意,IP不是按顺序排列的,因为IP在它响应时就会打印出来,所以先响应的就会先打印出来。