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