Be careful to attach cookies when sending requests~
It is recommended to pay attention to the following points when simulating login:
Look at the request sent during normal login in the browser: #🎜🎜 #

• What fields were submitted?

• What cookies did you bring?

• Does the requested address have parameters?

Then when submitting the form, it is not only the user name and password, but also a hidden
field. This field is written in the hidden input when the login form is generated, so it must be extracted; #🎜🎜 #In the address of the post form, there is also a jsessionid field, which you also need to extract and add from the login page; lt
In short, I hope my solution ideas can give you some guidance.

When the server detects no abnormalities between your simulated login information and the normally submitted information, the login is successful~

Imitate normal login Action
, keep thinking about it in the network debugging tool of the browser. Attached below is the simulated login crawler I wrote some time ago

 #coding:utf-8
 #!/usr/bin/python 
  
import HTMLParser 
import urlparse 
import urllib 
import urllib2 
import cookielib 
import string 
import re
import sys
import time
reload(sys)
sys.setdefaultencoding('utf-8')

COOKIE_FLAG = True  # true使用这次cookie  false使用上次cookie

hosturl = "http://202.203.222.202/cas/login"
history = "http://202.203.222.202/myspace/reader/book/historyBorrow?pageSize=200&pageNo=1"

cj = cookielib.LWPCookieJar() 
cookie_support = urllib2.HTTPCookieProcessor(cj) 
opener = urllib2.build_opener(cookie_support, urllib2.HTTPHandler) 
urllib2.install_opener(opener) 
#获取 lt
def getHTML(stdNum):
    cookie = cookielib.CookieJar()
    handler=urllib2.HTTPCookieProcessor(cookie)
    opener = urllib2.build_opener(handler)
    response = opener.open(hosturl)
    for item in cookie:
        if item.name == "JSESSIONID":
            jsessionId = item.value

    loginHTML = response.read()
    searchString = 'name="lt" value='
    try:
        index = loginHTML.index(searchString)
    except Exception as err:
        print "err:\t" + err
        return False
    lt = loginHTML[index +17:index +56]
    # print "lt:\t" + lt
    print "JD:   "+jsessionId
    targetPost = 'http://202.203.222.202/cas/login;jsessionid='+ jsessionId + '?service=http%3A%2F%2F202.203.222.202%2Fmyspace%2Freader%2Findex'
    headers = {
            'User-Agent' : 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.1', 
            "Host": "202.203.222.202",
            "Origin": "http://202.203.222.202",
            "Referer": "http://202.203.222.202/cas/login?service=http://202.203.222.202/myspace/reader/index",
            "Upgrade-Insecure-Requests": 1,
          } 
    postData = {
            "username":stdNum,
            "password":stdNum[3:],
            "lt": lt,
            "execution": 'e1s1',
            "_eventId": "submit",
            "submit": "登录",
          }
    postData = urllib.urlencode(postData)
    request = urllib2.Request(targetPost, postData, headers)
    logResult =  urllib2.urlopen(request).read().decode("utf8")

    if "登录系统" in logResult:
        print "失败啦！"
        return "login failed "
    historyBorrowPage = urllib2.urlopen(history) 
    historyHTML = historyBorrowPage.read().decode('utf8')

    if "登录系统" in historyHTML:
        return False
    else:
        logout = "http://202.203.222.202/myspace/reader/logout"
        logoutYa = urllib2.Request(logout)
        logoutPage = urllib2.urlopen(logoutYa)
        return historyHTML

By the way, why is it Taobao’s address== Just use the cookie you logged in with. Zhihu seems to have a verification code too