An example tutorial on using the Request library to simulate login in Python

Such a simple (unsafe) login form is rare anymore. The login form of the subtitle library is as follows, with irrelevant content omitted:

1 <form class="login-form" action="/User/login.html" method="post">2     <input type="hidden" name="referer" value="www.zimuku.net/">3     <input type="text" id="inputEmail" datatype="*1-16" value="" name="username">4     <input type="password" id="inputPassword" datatype="*6-20" name="password">5     <input type="checkbox" name="isremember" value="1" checked="">6     <button type="submit" class="btn submit-btn">登 陆</button>7 </form>

Through packet capture analysis, it can be found that the username and password are not encrypted:

Use POST directly to simulate login:

 1 import requests 2 from bs4 import BeautifulSoup 3  4 url='' 5 data={'referer':'','username':'***','password':'***','isremember':'1'} 6  7 #创建会话 8 session=requests.session() 9 #模拟登录10 r=session.post(url,data=data)11 #解析页面12 bs=BeautifulSoup(r.text,'lxml')13 14 print(bs.body.text) #登录成功！页面自动 跳转 等待时间： 1

Successful login, analyze the js code in the returned page, and find:

href = document.getElementById('href').href;
location.href = href;

Explain that the page you want to jump to is in the hyperlink with the id href:

<a id="href" href="/User/index.html">跳转</a>

Get the page you want to jump to, and then try to open a new page Whether the login status can be maintained:

1 href=''+bs.find(id='href').attrs['href']2 r2=ss.get(href)3 print(BeautifulSoup(r2.text,'lxml').title.text)#首页 - 用户中心 - 字幕库(zimuku.net)

The words "Home Page - User Center" are printed, and the login status is successfully maintained.

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