python接口自动化23-token参数关联登录（登录拉勾网）

前言

登录网站的时候，经常会遇到传token参数，token关联并不难，难的是找出服务器第一次返回token的值所在的位置，取出来后就可以动态关联了

登录拉勾网

1.先找到登录首页https://passport.lagou.com/login/login.html，输入账号和密码登录，抓包看详情

2.再重新登录一次抓包看的时候，头部有两个参数是动态的，token和code值每次都会不一样，只能用一次

X-Anit-Forge-Token: 45aa69d8-4afa-4235-8957-9dde7af1903e
X-Anit-Forge-Code: 20765316

找到token生成的位置

1.打开登录首页https://passport.lagou.com/login/login.html，直接按F5刷新（只做刷新动作，不输入账号和密码），然后从返回的页面找到token生成的位置

看注释内容：

</script>

    <!-- 页面样式 -->    <!-- 动态token，防御伪造请求，重复提交 -->
    <script>
    window.X_Anti_Forge_Token = '286fd3ae-ef82-4019-89c4-9408947a0e26';
    window.X_Anti_Forge_Code = '74603111';
</script>

前端的代码，注释内容暴露了token位置，嘿嘿！

2.接下来从返回的html里面解析出token和code两个参数的值

# coding:utf-8
import requests
import re
from bs4 import BeautifulSoup

# 作者：上海-悠悠 QQ交流群：512200893

def getTokenCode(s):
    '''
        要从登录页面提取token，code， 然后在头信息里面添加
        <!-- 页面样式 --><!-- 动态token，防御伪造请求，重复提交 -->
        <script type="text/javascript">
            window.X_Anti_Forge_Token = 'dde4db4a-888e-47ca-8277-0c6da6a8fc19';
            window.X_Anti_Forge_Code = '61142241';
        </script>
    '''
    url = 'https://passport.lagou.com/login/login.html'
    h = {
         "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0",
        }
    # 更新session的headers
    s.headers.update(h)
    data = s.get(url, verify=False)
    soup = BeautifulSoup(data.content, "html.parser", from_encoding='utf-8')
    tokenCode = {}
    try:
        t = soup.find_all('script')[1].get_text()
        print(t)
        tokenCode['X_Anti_Forge_Token'] = re.findall(r"Token = '(.+?)'", t)[0]
        tokenCode['X_Anti_Forge_Code'] = re.findall(r"Code = '(.+?)'", t)[0]
    except:
        print("获取token和code失败")
        tokenCode['X_Anti_Forge_Token'] = ""
        tokenCode['X_Anti_Forge_Code'] = ""
    return tokenCode

模拟登陆

1.登陆的时候这里密码参数虽然加密了，但是是固定的加密方式，所以直接复制抓包的加密后字符串就行了

# coding:utf-8
import requests
import re
from bs4 import BeautifulSoup

# 作者：上海-悠悠 QQ交流群：512200893

def login(s, gtoken, user, psw):
    '''
    function:登录拉勾网网站
    :param s:  传s = requests.session()
    :param gtoken: 上一函数getTokenCode返回的tokenCode
    :param user: 账号
    :param psw: 密码
    :return: 返回json
    '''
    url2 = 'https://passport.lagou.com/login/login.json'
    h2 = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0",
    "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
    "X-Requested-With": "XMLHttpRequest",
    "X-Anit-Forge-Token": gtoken['X_Anti_Forge_Token'],
    "X-Anit-Forge-Code": gtoken['X_Anti_Forge_Code'],
    "Referer": "https://passport.lagou.com/login/login.html",
    }

    # 更新s的头部
    s.headers.update(h2)

    body = {
            "isValidate":'true',
            "username": user,
            "password": psw,
            "request_form_verifyCode": "",
            "submit": ""
            }
    r2 = s.post(url2 , data=body, verify=False)
    print(r2.text)
    return r2.json()

密码加密

1.这里密码是md5加密的（百度看了其它大神的博客，才知道的）

# coding:utf-8
import requests
import re
from bs4 import BeautifulSoup
import hashlib

def encryptPwd(passwd):
    # 作者：上海-悠悠 QQ交流群：512200893
    # 对密码进行了md5双重加密
    passwd = hashlib.md5(passwd.encode('utf-8')).hexdigest()
    # veennike 这个值是在js文件找到的一个写死的值
    passwd = 'veenike'+passwd+'veenike'
    passwd = hashlib.md5(passwd.encode('utf-8')).hexdigest()
    return passwd
if __name__ == "__main__":
   # 测试密码123456
   print(encryptPwd("123456"))

输出结果：

2.跟抓包的数据对比，发现是一样的，说明加密成功

参考代码：

# coding:utf-8
import requests
import re
from bs4 import BeautifulSoup
import urllib3
import hashlib
urllib3.disable_warnings()


# 作者：上海-悠悠 QQ交流群：512200893

class LoginLgw():

    def __init__(self, s):
        self.s = s

    def getTokenCode(self):
        '''
            要从登录页面提取token，code， 然后在头信息里面添加
            <!-- 页面样式 --><!-- 动态token，防御伪造请求，重复提交 -->
            <script type="text/javascript">
                window.X_Anti_Forge_Token = 'dde4db4a-888e-47ca-8277-0c6da6a8fc19';
                window.X_Anti_Forge_Code = '61142241';
            </script>
        '''
        url = 'https://passport.lagou.com/login/login.html'
        h = {
             "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0",
            }
        # 更新session的headers
        self.s.headers.update(h)
        data = self.s.get(url, verify=False)
        soup = BeautifulSoup(data.content, "html.parser", from_encoding='utf-8')
        tokenCode = {}
        try:
            t = soup.find_all('script')[1].get_text()
            print(t)
            tokenCode['X_Anti_Forge_Token'] = re.findall(r"Token = '(.+?)'", t)[0]
            tokenCode['X_Anti_Forge_Code'] = re.findall(r"Code = '(.+?)'", t)[0]
            return tokenCode
        except:
            print("获取token和code失败")
            tokenCode['X_Anti_Forge_Token'] = ""
            tokenCode['X_Anti_Forge_Code'] = ""
            return tokenCode

    def encryptPwd(self,passwd):
        # 对密码进行了md5双重加密
        passwd = hashlib.md5(passwd.encode('utf-8')).hexdigest()
        # veennike 这个值是在js文件找到的一个写死的值
        passwd = 'veenike'+passwd+'veenike'
        passwd = hashlib.md5(passwd.encode('utf-8')).hexdigest()
        return passwd

    def login(self, user, psw):
        '''
        function:登录拉勾网网站
        :param user: 账号
        :param psw: 密码
        :return: 返回json
        '''
        gtoken = self.getTokenCode()
        print(gtoken)
        print(gtoken['X_Anti_Forge_Token'])
        print(gtoken['X_Anti_Forge_Code'])
        url2 = 'https://passport.lagou.com/login/login.json'
        h2 = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0",
        "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
        "X-Requested-With": "XMLHttpRequest",
        "X-Anit-Forge-Token": gtoken['X_Anti_Forge_Token'],
        "X-Anit-Forge-Code": gtoken['X_Anti_Forge_Code'],
        "Referer": "https://passport.lagou.com/login/login.html",
        }

        # 更新s的头部
        self.s.headers.update(h2)
        passwd = self.encryptPwd(psw)

        body = {
                "isValidate":'true',
                "username": user,
                "password": passwd,
                "request_form_verifyCode": "",
                "submit": ""
                }
        r2 = self.s.post(url2 , data=body, verify=False)
        try:
            print(r2.text)
            return r2.json()
        except:
            print("登录异常信息：%s" % r2.text)
            return None

if __name__ == "__main__":
    s = requests.session()
    lgw = LoginLgw(s)
    lgw.login("15221000000", "123456")

---------------------------------python接口自动化完整版-------------------------

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