Detailed explanation of Python simulated login example

This article mainly introduces the Python simulated login implementation code. The detailed code is compiled here, which has certain reference value. Interested friends can refer to it.

The following is a website using Python. A small example of simulated login.

Principle

Use Cookie technology to bypass website login verification. To use the cookielib library. Process:

1. Create a container to save cookies. The options are CookieJar, FileCookieJar, MozillaCookieJar, and LWPCookieJar. The relationship between them is CookieJar --- Derived -->FileCookieJar -- - Derive—–>MozillaCookieJar and LWPCookieJar.

2. Then create a processor handler that handles Cookie. Pass urllib2.HTTPCookieProcessor(cookie)

3. Create an opener for opening the website. That’s it. This opener is more common than the urllib2.urlopen method. opener = urllib2.build_opener(handler).

4. Then we can use opener to access the network normally.

Small case

The function implemented is to simulate logging into the academic affairs website of Dalian University of Technology. The code is as follows:

# coding:UTF-8

import urllib,urllib2,cookielib

filename = r'F:\pachong\gaoqing\dlutcookie.txt'
# show cookie and save to local
cookie = cookielib.MozillaCookieJar()
handler = urllib2.HTTPCookieProcessor(cookie)
opener = urllib2.build_opener(handler)
# 记得使用urllib模块进行参数的encode
postdata = urllib.urlencode({
  # 哈哈，本宫不给你们我的账号╭(╯^╰)╮
  'zjh':'xxxxxxxxx',
  'mm':'XXXXXX'
})


# 登陆到教务系统的url
url = 'http://zhjw.dlut.edu.cn/loginAction.do'

# 开始进行模拟登陆，并把cookie保存到变量
response = opener.open(url,postdata)
cookie.save(filename,ignore_discard=True,ignore_expires=True)

# 打印一下获得的cookie信息吧
for item in cookie:
  item.name + ' = ' + item.value

# 利用cookie访问另一个网址  登陆到个人成绩的URL
course_url='zhjw.dlut.edu.cn/xkAction.do?actionType=6'
course_header={
  'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586',
  'referer':'zhjw.dlut.edu.cn/menu/s_main.jsp'
}

result = opener.open(course_url)
print result.read()

Running results

##Summary

In fact, for simulated login For example, the first login is to obtain the cookie data. Then use the opener we created to complete the key further operations we want to perform next. All we need to understand is the process of using the cookie.

The above is the detailed content of Detailed explanation of Python simulated login example. For more information, please follow other related articles on the PHP Chinese website!