记录openlaw的反爬

地址：http://openlaw.cn/login.jsp

需要登陆，找到Form data

根据提交数据可以知道需要找到_csrf和加密后的password，_csrf由服务器生成，在登陆页面

接下来找加密password的js代码，ctrl+F搜索password，可以看出password在加密后重新填入input再提交

找到加密函数KeyEncrypt

复制到snippets调试，调用了JSEncrypt，CryptoJs，继续搜索

全都复制加到snippets里执行

这样就获得了加密passwoed的js代码，接下来需要让这段代码在python里执行，可以用execjs和js2py，推荐用execjs

把snippets的代码复制出来另存为js，用execjs执行

要注意运行时环境，如果是node.js或Jscript都会报错：navigator is not define，nodejs和Jscript都不是浏览器，可以用PhantomJS。

#运行时环境设置import execjs
import execjs.runtime_names
os.environ["EXECJS_RUNTIME"] = "PhantomJS"
PhantomJS = execjs.get(execjs.runtime_names.PhantomJS)
print(execjs.get().name)

js文件路径前要加r，加密密码结果如图

因为csfr和post data在两页，所以需要一起运行

#获取csfrheaders={
"Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3",
"Accept-Encoding":"gzip,deflate",
"Accept-Language":"zh-CN,zh;q=0.9",
"Cache-Control":"max-age=0",
"Connection":"keep-alive",
"Content-Type":"application/x-www-form-urlencoded",
"Host":"openlaw.cn",
"Upgrade-Insecure-Requests":"1",
"User-Agent":"Mozilla/5.0(WindowsNT10.0;Win64;x64)AppleWebKit/537.36(KHTML,likeGecko)Chrome/73.0.3683.86Safari/537.36",
}
r=session.get("http://openlaw.cn/login.jsp?",headers=headers1)
tree=etree.HTML(r.text)
csrf=tree.xpath('//input[@name="_csrf"]/@value')[0]

#post form data
post_url="http://openlaw.cn/login"
with open(r"C:\Users\37576\Desktop\123.js",encoding="utf-8")as f:js=f.read()ctx = execjs.compile(js)pwd=ctx.call("keyEncrypt","XXXXXXXX")#密码
data={
"_csrf":csrf,
"username":"#########",#账户
"password":pwd,
"_spring_security_remember_me":"true",
}
res=session.post(post_url,data=data,headers=headers)

tree=etree.HTML(res.text)
lala=tree.xpath('//div[@class="bbp-user-section"]//text()')

登陆成功

接下来分析抓取页面

url="http://openlaw.cn/guidance/16444eba67afe97881fa6521d333ef10"
headers1={
"Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3",
"Accept-Encoding":"gzip,deflate",
"Accept-Language":"zh-CN,zh;q=0.9",
"Connection":"keep-alive",
"Host":"openlaw.cn",
"Upgrade-Insecure-Requests":"1",
"User-Agent":"Mozilla/5.0(WindowsNT10.0;Win64;x64)AppleWebKit/537.36(KHTML,likeGecko)Chrome/73.0.3683.86Safari/537.36",
}
a=session.get(url,headers=headers1)

抓取结果全是乱码

用火狐浏览器抓包分析

第一页与刚才抓到的页面一样，第二页有数据，在第一页面下面

对比分析发现请求地址一样，但cookie不一样，参考资料了解到是js加密cookie，带新cookie的请求才能显示正确页面，所以需要找到添加cookie的js代码

查资料得知下面这种加密叫jjencode，jjencodeDemo地址：http://utf-8.jp/public/jjencode.html

],_$_:++$,$_$$:({}+"")[$],$$_$:($[$]+"")[$],_$$:++$,$$$_:(!""+"")[$],$__:++$,$_$:++$,$$__:({}+"")[$],$$_:++$,$$$:++$,$___:++$,$__$:++$};$.$_=($.$_=$+"")[$.$_$]+($._$=$.$_[$.__$])+($.$$=($.$+"")[$.__$])+((!$)+"")[$._$$]+($.__=$.$_[$.$$_])+($.$=(!""+"")[$.__$])+($._=(!""+"")[$._$_])+$.$_[$.$_$]+$.__+$._$+$.$;$.$$=$.$+(!""+"")[

#这种加密叫jsfunk，地址是：http://www.jsfuck.com/+[]+!+[]+!+[]]+(!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]

下面是aaencode，地址是http://utf-8.jp/public/aaencode.html

ﾟωﾟﾉ= /｀ｍ´）ﾉ ~┻━┻ //*´∇｀*/ ['_']; o=(ﾟｰﾟ) =_=3; c=(ﾟΘﾟ) =(ﾟｰﾟ)-(ﾟｰﾟ); (ﾟДﾟ) =(ﾟΘﾟ)= (o^_^o)/ (o^_^o);(ﾟДﾟ)={ﾟΘﾟ: '_' ,ﾟωﾟﾉ : ((ﾟωﾟﾉ==3) +'_') [ﾟΘﾟ] ,ﾟｰﾟﾉ :(ﾟωﾟﾉ+ '_')[o^_^o -(ﾟΘﾟ)] ,ﾟДﾟﾉ:((ﾟｰﾟ==3) +'_')[ﾟｰﾟ] }; (ﾟДﾟ) [ﾟΘﾟ] =((ﾟωﾟﾉ==3) +'_') [c^_^o];(ﾟДﾟ) ['c'] = ((ﾟДﾟ)+'_') [ (ﾟｰﾟ)+(ﾟｰﾟ)-(ﾟΘﾟ) ];

加密原理百度

代码在可以执行获得内容或者找工具解密成明文

(function anonymous() {if (window.wp1) {document.cookie = 'OPEN_E4C0C08491=' + wp3;document.cookie = 'OPEN_ID=B32pJOwfO/AJZJ3ZGmnunQNTaUie84jnyHoNCq/onZQ='}
}
)

代码有添加cookie，第二行拉出来单独执行

有报错但得到了解析后的代码

页面上所以js代码如下：

var wp1 = 'xKIOt5jUZQcS8wurcX4lghwlET9K0IWBUsS3ZqmSamCBTAPg7Fl5sVr443dyK42p';
var wp2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
var wp3 = "548545fe3ced4f3494934e537e304705";
var wp4 = "464acf618bf62df3e7e37e80c2c1a04d";
var wp5 = "0aa9566c4aa30883e34d0e1a530bf508";
var wp6 = "a8f49232d343e4b94ff7958088fa6734";
var wp7 = "82f778b45a9fce8589105c852174947b";
var wp8 = "3221d819c9b96d2631d0b5084c736f69";
if (window.wp1) {document.cookie = 'OPEN_E4C0C08491=' + wp3;document.cookie = 'OPEN_ID=B32pJOwfO/AJZJ3ZGmnunQNTaUie84jnyHoNCq/onZQ='}var getGlobal = function() {if (typeof self !== '') {return self};if (typeof window !== '') {return window};if (typeof global !== '') {return global};throw new Error('unable to locate global object')};
function _process(s) {var result = s.substring(5, 7).concat('s').concat(s.substring(14, 15)).concat('v').concat(s.substring(9, 13)).concat('g').concat(s.substring(5)).concat('l').concat(s.substring(11, 19));return result.substr(0, 32);};var _switch = false;if ((getGlobal() === window)) {_switch = true} else {_switch = false};document.cookie = 'SIGNIN_ID=3e2291010f36c9244c633aba4cdcdd42';
document.cookie = 'SIGNIN_UC=9e65d8fc646e49fb7a0f9f8237915bfb';
document.cookie = 'UNDEFINED=432e9111ecf89746f3046ca970814f41';
if (_switch) {document.cookie = 'OPEN_589D5869B5=' + _process(wp3);setTimeout("location.reload();", 100);
}

有六条cookie修改完后通过location.reload()刷新页面，带着新cookie刷新后的页面能访问到有数据的页面

接下来需要把js代码拉出来执行获得cookie，但是有一点问题就是cookie数据：OPEN_E4C0C08491，OPEN_ID，SIGNIN_ID，UNDEFINED，OPEN_589D5869B5不知道从哪里来的，找了很久都没找到

没有这些数据就没办法写cookie，就此卡住。。。等水平提高再来解决

为了获取页面数据，下面用selenium解决该问题

#配置chorme无头浏览器from selenium import webdriver
from selenium.webdriver.chrome.options import Options
chrome_options = Options()
chrome_options.add_argument('--headless')
driver = webdriver.Chrome(chrome_options=chrome_options,executable_path = 'D:\python\chromedriver.exe')
from time import sleep

#登陆账号driver.get("http://openlaw.cn/login.jsp?logout")
driver.find_element_by_id("username").send_keys("XXXXXXXXX")
driver.find_element_by_id("password").send_keys("XXXXXXXXX")
sleep(2)
driver.find_element_by_id("submit").click()

#获取页面数据driver.get("http://openlaw.cn/guidance/167ce490ba94c3ed26baab5689fdd620")
sleep(2)
title=driver.find_element_by_xpath('//h1[@class="entry-title"]').text
guid=driver.find_element_by_xpath('//div[@class="annotator-wrapper"]/p').text
content=driver.find_element_by_xpath('//div[@class="annotator-wrapper"]/p[2]').text
page_detail={"title":title,"content":guid+"\n"+content.replace("\u3000"," ")}

结果

小结

1.RSA学习地址：https://blog.csdn.net/u014044812/article/details/80782448

2.用代理或访问频率异常会频繁出现验证码

3.访问有资源的网页时服务器会验证cookie，如果不带有特定cookie访问，网页会转到空白页执行js代码添加cookie，然后302或reload带着新cookie重新请求出有数据的页面

4.常见的js混淆方式

5.还不熟练js调试用法，等水平提高继续破解该反爬

转载于:https://www.cnblogs.com/shenyiyangle/p/10743133.html