urllib2使用代理服务器详解编程语言

本代码演示了python的urllib2模块如何使用代理，以及需要登录验证的proxy

# The proxy address and port: 
proxy_info = { 'host' : 'proxy.myisp.com', 
               'port' : 3128 
             } 
  
# We create a handler for the proxy 
proxy_support = urllib2.ProxyHandler({"http" : "http://%(host)s:%(port)d" % proxy_info}) 
  
# We create an opener which uses this handler: 
opener = urllib2.build_opener(proxy_support) 
  
# Then we install this opener as the default opener for urllib2: 
urllib2.install_opener(opener) 
  
# Now we can send our HTTP request: 
htmlpage = urllib2.urlopen("http://sebsauvage.net/").read(200000) 
  
#如果代理需要验证 
proxy_info = { 'host' : 'proxy.myisp.com', 
               'port' : 3128, 
               'user' : 'John Doe', 
               'pass' : 'mysecret007' 
             } 
proxy_support = urllib2.ProxyHandler({"http" : "http://%(user)s:%(pass)s@%(host)s:%(port)d" % proxy_info}) 
opener = urllib2.build_opener(proxy_support) 
urllib2.install_opener(opener) 
htmlpage = urllib2.urlopen("http://sebsauvage.net/").read(200000)