python urllib简单用法

#!/usr/bin/env python
# -*- coding: UTF-8 -*-
from urllib.request import Request
from urllib.request import urlopen
from urllib import parse

##简单获取网页源码
#html = urlopen("http://www.baidu.com")#打开链接
#print(html.read().decode("utf-8"))#返回UTF-8编码的网站源码


##模拟发送POST请求
#req = Request("http://xxx.xxxx.com/apitest/userapi.php?act=addsheji")
#
#postData = parse.urlencode([
#	("name","str1"),
#	("tel","str2"),
#	("mac","str3")
#])
#
#req.add_header("Origin","http://www.baidu.com") #请求头部 添加来源
#req.add_header("User-Agent","Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36")
#resp = urlopen(req,data=postData.encode('utf-8'))
#
#print(resp.read().decode("utf-8"))

##带请求参数获取网页源码的方法
#发起请求
req = Request("http://www.baidu.com")
#添加请求参数
req.add_header("User-Agent","Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36")	
#打开链接
resp = urlopen(req)	
#返回UTF-8编码的网站源码
print(resp.read().decode("utf-8"))