python测试网络可达性的方法

1、ping连通性测试

#!/usr/bin/env python
#-*- coding: utf-8 -*-
import os,sys,re
import subprocess

def NetCheck(ip):
   try:
    p = subprocess.Popen(["ping -c 1 -W 1 "+ ip],stdout=subprocess.PIPE,stderr=subprocess.PIPE,shell=True)
    out=p.stdout.read()
    #err=p.stderr.read()
    regex=re.compile('100% packet loss')
    #print out
    #print regex
    #print err
    if len(regex.findall(out)) == 0:
        print ip + ': host up'
        return 'UP'
    else:
        print ip + ': host down'
        return 'DOWN'
   except:
    print 'NetCheck work error!'
    return 'ERR'

ip1="2.3.2.2"
domain1="www.baidu.com"
NetCheck(ip1)
NetCheck(domain1)

或者：连通返回0，不通返回512

>>> ret1=os.system('ping -c 2 -W 1 114.114.114.14')
PING 114.114.114.14 (114.114.114.14): 56 data bytes
Request timeout for icmp_seq 0

--- 114.114.114.14 ping statistics ---
2 packets transmitted, 0 packets received, 100.0% packet loss
>>> ret1
512
>>> ret1=os.system('ping -c 2 -W 1 114.114.114.114')
PING 114.114.114.114 (114.114.114.114): 56 data bytes

--- 114.114.114.114 ping statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss, 2 packets out of wait time
round-trip min/avg/max/stddev = 27.535/31.029/34.523/3.494 ms
>>> ret1
0
>>>

2、http(s)连通性测试

#!/usr/bin/env python  
#-*- coding: utf-8 -*-
import urllib2
 1 def http_validate(target_url):
    try:
        urllib2.urlopen(target_host)
        return True
    except:
        return False


url1 = 'https://www.baidu.com'
url2 = 'http://www.baudi.com'

if http_validate(url1):
    print "可达"
else:
    print "不可达"

if http_validate(url2):
    print "可达"
else:
    print "不可达"

参考：

1、http://dgd2010.blog.51cto.com/1539422/1865925

2、http://blog.csdn.net/wyzxg/article/details/40048445