python测试网络可达性的方法

1、ping连通性测试

 1 #!/usr/bin/env python
 2 #-*- coding: utf-8 -*-
 3 import os,sys,re
 4 import subprocess
 5 
 6 def NetCheck(ip):
 7    try:
 8     p = subprocess.Popen(["ping -c 1 -W 1 "+ ip],stdout=subprocess.PIPE,stderr=subprocess.PIPE,shell=True)
 9     out=p.stdout.read()
10     #err=p.stderr.read()
11     regex=re.compile('100% packet loss')
12     #print out
13     #print regex
14     #print err
15     if len(regex.findall(out)) == 0:
16         print ip + ': host up'
17         return 'UP'
18     else:
19         print ip + ': host down'
20         return 'DOWN'
21    except:
22     print 'NetCheck work error!'
23     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

 1 >>> ret1=os.system('ping -c 2 -W 1 114.114.114.14')
 2 PING 114.114.114.14 (114.114.114.14): 56 data bytes
 3 Request timeout for icmp_seq 0
 4 
 5 --- 114.114.114.14 ping statistics ---
 6 2 packets transmitted, 0 packets received, 100.0% packet loss
 7 >>> ret1
 8 512
 9 >>> ret1=os.system('ping -c 2 -W 1 114.114.114.114')
10 PING 114.114.114.114 (114.114.114.114): 56 data bytes
11 
12 --- 114.114.114.114 ping statistics ---
13 2 packets transmitted, 2 packets received, 0.0% packet loss, 2 packets out of wait time
14 round-trip min/avg/max/stddev = 27.535/31.029/34.523/3.494 ms
15 >>> ret1
16 0
17 >>>

2、http(s)连通性测试

#!/usr/bin/env python  
#-*- coding: utf-8 -*-
import urllib2
 1 def http_validate(target_url):
 2     try:
 3         urllib2.urlopen(target_host)
 4         return True
 5     except:
 6         return False
 7 
 8 
 9 url1 = 'https://www.baidu.com'
10 url2 = 'http://www.baudi.com'
11 
12 if http_validate(url1):
13     print "可达"
14 else:
15     print "不可达"
16 
17 if http_validate(url2):
18     print "可达"
19 else:
20     print "不可达"

参考：

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

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