使用python验证代理ip是否可用的实现方法

# _*_ coding:utf-8 _*_
import urllib2
import re
class TestProxy(object):
  def __init__(self):
    self.ip = '106.46.136.64'
    self.port = '808'
    self.url = 'http://www.baidu.com'
    self.timeout = 3
    self.regex = re.compile(r'baidu.com')
    self.run()
  def run(self):
    self.linkWithProxy()
  def linkWithProxy(self):
    server = 'http://'+ self.ip + ':'+ self.port
    opener = urllib2.build_opener(urllib2.ProxyHandler({'http':server}))
    urllib2.install_opener(opener)
    try:
      response = urllib2.urlopen(self.url, timeout=self.timeout)
    except:
      print '%s connect failed' % server
      return
    else:
      try:
        str = response.read()
      except:
        print '%s connect failed' % server
        return
      if self.regex.search(str):
        print '%s connect success .......' % server
        print self.ip + ':' + self.port
if __name__ == '__main__':
  Tp = TestProxy()

import requests
try:
  requests.get('http://wenshu.court.gov.cn/', proxies={"http":"http://121.31.154.12:8123"})
except:
  print 'connect failed'
else:
  print 'success'

import telnetlib
try:
  telnetlib.Telnet('127.0.0.1', port='80', timeout=20)
except:
  print 'connect failed'
else:
  print 'success'