网页下载器urllib2实例

1、最简洁方法

response：直接请求

response.getcode()：获取状态码

response.read()：读取内容 

#coding:utf8
import urllib2
url = "http://www.baidu.com"
print '第一种方法'
response1 = urllib2.urlopen(url)
print response1.getcode()
print len(response1.read())

第一种方法
200
118765

 

2、添加data、http header

request = urllib2.Request(url)：创建request对象

request.add_data：添加数据

request.add_header:添加http的header

response = urllib2.urlopen(request):发送请求获取结果

print '第二种方法'
request = urllib2.Request(url)
request.add_header("user-agent", "Mozilla/5.0")
response2 = urllib2.urlopen(request)
print response2.getcode()
print len(response2.read())

第二种方法
200
118649

3、添加特殊情景的处理器

cj = cookielib.CookieJar():创建cookie容器

opener = 。。。：创建1个opener

urllib2.install_opener(opener):给urllib2安装opener

print '第三种方法'
cj = cookielib.CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
response3 = urllib2.urlopen(url)
print response3.getcode()
print cj
print response3.read()

第三种方法
200
<CookieJar[]>
<!DOCTYPE html>
<!--STATUS OK-->

posted @ 2018-11-05 16:46  strawqqhat  阅读(102)  评论(0)  编辑  收藏  举报
#home h1{ font-size:45px; } body{ background-image: url("放你的背景图链接"); background-position: initial; background-size: cover; background-repeat: no-repeat; background-attachment: fixed; background-origin: initial; background-clip: initial; height:100%; width:100%; } #home{ opacity:0.7; } .wall{ position: fixed; top: 0; left: 0; bottom: 0; right: 0; } div#midground{ background: url("https://i.postimg.cc/PP5GtGtM/midground.png"); z-index: -1; -webkit-animation: cc 200s linear infinite; -moz-animation: cc 200s linear infinite; -o-animation: cc 200s linear infinite; animation: cc 200s linear infinite; } div#foreground{ background: url("https://i.postimg.cc/z3jZZD1B/foreground.png"); z-index: -2; -webkit-animation: cc 253s linear infinite; -o-animation: cc 253s linear infinite; -moz-animation: cc 253s linear infinite; animation: cc 253s linear infinite; } div#top{ background: url("https://i.postimg.cc/PP5GtGtM/midground.png"); z-index: -4; -webkit-animation: da 200s linear infinite; -o-animation: da 200s linear infinite; animation: da 200s linear infinite; } @-webkit-keyframes cc { from{ background-position: 0 0; transform: translateY(10px); } to{ background-position: 600% 0; } } @-o-keyframes cc { from{ background-position: 0 0; transform: translateY(10px); } to{ background-position: 600% 0; } } @-moz-keyframes cc { from{ background-position: 0 0; transform: translateY(10px); } to{ background-position: 600% 0; } } @keyframes cc { 0%{ background-position: 0 0; } 100%{ background-position: 600% 0; } } @keyframes da { 0%{ background-position: 0 0; } 100%{ background-position: 0 600%; } } @-webkit-keyframes da { 0%{ background-position: 0 0; } 100%{ background-position: 0 600%; } } @-moz-keyframes da { 0%{ background-position: 0 0; } 100%{ background-position: 0 600%; } } @-ms-keyframes da { 0%{ background-position: 0 0; } 100%{ background-position: 0 600%; } }