httplib是python自带的模块，无需额外安装
#!/usr/bin/env python
#coding:utf8
import httplib
if __name__ == "__main__":
conn = httplib.HTTPConnection('www.google.com',80)
#conn.set_debuglevel(2)
conn.request('GET','',headers={"Host": "www.google.com",
"User-Agent": "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.1) Gecko/20090624 Firefox/3.5",
"Accept": "text/plain"})
respond = conn.getresponse()
#输出状态码
print "status: %s" % respond.status
#输出当次请求的结果的表述内容，200是ok，404是Not Found
print "reason: %s" % respond.reason
#关闭连接
conn.close()
