这是我的gitee仓库:https://gitee.com/qin-laoda/python-exercises
有兴趣的小可爱们可以点进去看看,
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下面我们来按照爬虫思路找一下我们要爬的网页,并获取数据
下面我以https://ggzyfw.fujian.gov.cn/business/list/来爬取想要的数据
首先我们进去找到该网页,打开开发者工具找到如下所示:
图中我们没有搜索到想要的内容,那我们就查看源代码看看,如图:
可以看出也没有找到我们想要的数据,那就有可能是被加密了,下面我们就找到对应的接口其看看
如下图:
当我们随机点击一个看看就会发现,返回的是一堆看不懂的数据,其实这就是js加密后返回来的数据,下面我们就来进入正题
JavaScript 是世界上最流行的语言之一,是一种运行在客户端的脚本语言 (Script 是脚本的意思)
脚本语言:不需要编译,运行过程中由 js 解释器( js 引擎)逐行来进行解释并执行
现在也可以基于 Node.js 技术进行服务器端编程
___________________________
下面我来说一些思路:
python代码跑爬虫,js代码去做参数加密
例如:
from:en
to:zh
query:hello
transtype:realtime
simple_means_flag:3
sign:54706.276099
token:12cb0bfe4bc476dc010333cfb8148927
domain:common
ts:1686129751591
sign是通过js加密的! ! ! !,要去找到网站的sign加密的位置,然后把这段js代码扣下来,放到js文件里面执行,执行的结果要和网页的一样 ,比如网页的sign:54706.276099,我们执行的结果也要是这样的
总结一小下:就是通过python代码运行js文件,js文件返回结果给python,然后python再利用
来发送请求
下面我来讲解怎么找到页面的js文件
以百度翻译为例https://fanyi.baidu.com/translate?aldtype=16047&query=hello%0D%0A%0D%0A&keyfrom=baidu&smartresult=dict&lang=auto2zh#en/zh/hello
第二步:
第三步:
第四步:
第五步(找到含有对应内容的就是文件,然后打一个标记,再继续找直到找完全部):
第七步:
我们要好好分析一下
第八步点击进去会有一下的提示
第十步:找到对应的js代码:
function n(t, e) {
for (var n = 0; n < e.length - 2; n += 3) {
var r = e.charAt(n + 2);
r = "a" <= r ? r.charCodeAt(0) - 87 : Number(r),
r = "+" === e.charAt(n + 1) ? t >>> r : t << r,
t = "+" === e.charAt(n) ? t + r & 4294967295 : t ^ r
}
return t
}
function arr(t) {
var o, i = t.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g);
if (null === i) {
var a = t.length;
a > 30 && (t = "".concat(t.substr(0, 10)).concat(t.substr(Math.floor(a / 2) - 5, 10)).concat(t.substr(-10, 10)))
} else {
for (var s = t.split(/[\uD800-\uDBFF][\uDC00-\uDFFF]/), c = 0, l = s.length, u = []; c < l; c++)
"" !== s[c] && u.push.apply(u, function(t) {
if (Array.isArray(t))
return e(t)
}(o = s[c].split("")) || function(t) {
if ("undefined" != typeof Symbol && null != t[Symbol.iterator] || null != t["@@iterator"])
return Array.from(t)
}(o) || function(t, n) {
if (t) {
if ("string" == typeof t)
return e(t, n);
var r = Object.prototype.toString.call(t).slice(8, -1);
return "Object" === r && t.constructor && (r = t.constructor.name),
"Map" === r || "Set" === r ? Array.from(t) : "Arguments" === r || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(r) ? e(t, n) : void 0
}
}(o) || function() {
throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")
}()),
c !== l - 1 && u.push(i[c]);
var p = u.length;
p > 30 && (t = u.slice(0, 10).join("") + u.slice(Math.floor(p / 2) - 5, Math.floor(p / 2) + 5).join("") + u.slice(-10).join(""))
}
r='320305.131321201'
for (var d = "".concat(String.fromCharCode(103)).concat(String.fromCharCode(116)).concat(String.fromCharCode(107)), h = (null !== r ? r : (r = window[d] || "") || "").split("."), f = Number(h[0]) || 0, m = Number(h[1]) || 0, g = [], y = 0, v = 0; v < t.length; v++) {
var _ = t.charCodeAt(v);
_ < 128 ? g[y++] = _ : (_ < 2048 ? g[y++] = _ >> 6 | 192 : (55296 == (64512 & _) && v + 1 < t.length && 56320 == (64512 & t.charCodeAt(v + 1)) ? (_ = 65536 + ((1023 & _) << 10) + (1023 & t.charCodeAt(++v)),
g[y++] = _ >> 18 | 240,
g[y++] = _ >> 12 & 63 | 128) : g[y++] = _ >> 12 | 224,
g[y++] = _ >> 6 & 63 | 128),
g[y++] = 63 & _ | 128)
}
for (var b = f, w = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(97)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(54)), k = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(51)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(98)) + "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(102)), x = 0; x < g.length; x++)
b = n(b += g[x], w);
return b = n(b, k),
(b ^= m) < 0 && (b = 2147483648 + (2147483647 & b)),
"".concat((b %= 1e6).toString(), ".").concat(b ^ f)
}
console.log(arr("你好"));
结果:
这里我们不要高兴得太早,因为我们只完成了js,还有python代码没完成
安装python模块PyExecjs
pip install PyExecJS
js文件:
function n(t, e) {
for (var n = 0; n < e.length - 2; n += 3) {
var r = e.charAt(n + 2);
r = "a" <= r ? r.charCodeAt(0) - 87 : Number(r),
r = "+" === e.charAt(n + 1) ? t >>> r : t << r,
t = "+" === e.charAt(n) ? t + r & 4294967295 : t ^ r
}
return t
}
function arr(t) {
var o, i = t.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g);
if (null === i) {
var a = t.length;
a > 30 && (t = "".concat(t.substr(0, 10)).concat(t.substr(Math.floor(a / 2) - 5, 10)).concat(t.substr(-10, 10)))
} else {
for (var s = t.split(/[\uD800-\uDBFF][\uDC00-\uDFFF]/), c = 0, l = s.length, u = []; c < l; c++)
"" !== s[c] && u.push.apply(u, function(t) {
if (Array.isArray(t))
return e(t)
}(o = s[c].split("")) || function(t) {
if ("undefined" != typeof Symbol && null != t[Symbol.iterator] || null != t["@@iterator"])
return Array.from(t)
}(o) || function(t, n) {
if (t) {
if ("string" == typeof t)
return e(t, n);
var r = Object.prototype.toString.call(t).slice(8, -1);
return "Object" === r && t.constructor && (r = t.constructor.name),
"Map" === r || "Set" === r ? Array.from(t) : "Arguments" === r || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(r) ? e(t, n) : void 0
}
}(o) || function() {
throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")
}()),
c !== l - 1 && u.push(i[c]);
var p = u.length;
p > 30 && (t = u.slice(0, 10).join("") + u.slice(Math.floor(p / 2) - 5, Math.floor(p / 2) + 5).join("") + u.slice(-10).join(""))
}
r='320305.131321201'
for (var d = "".concat(String.fromCharCode(103)).concat(String.fromCharCode(116)).concat(String.fromCharCode(107)), h = (null !== r ? r : (r = window[d] || "") || "").split("."), f = Number(h[0]) || 0, m = Number(h[1]) || 0, g = [], y = 0, v = 0; v < t.length; v++) {
var _ = t.charCodeAt(v);
_ < 128 ? g[y++] = _ : (_ < 2048 ? g[y++] = _ >> 6 | 192 : (55296 == (64512 & _) && v + 1 < t.length && 56320 == (64512 & t.charCodeAt(v + 1)) ? (_ = 65536 + ((1023 & _) << 10) + (1023 & t.charCodeAt(++v)),
g[y++] = _ >> 18 | 240,
g[y++] = _ >> 12 & 63 | 128) : g[y++] = _ >> 12 | 224,
g[y++] = _ >> 6 & 63 | 128),
g[y++] = 63 & _ | 128)
}
for (var b = f, w = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(97)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(54)), k = "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(51)) + "".concat(String.fromCharCode(94)).concat(String.fromCharCode(43)).concat(String.fromCharCode(98)) + "".concat(String.fromCharCode(43)).concat(String.fromCharCode(45)).concat(String.fromCharCode(102)), x = 0; x < g.length; x++)
b = n(b += g[x], w);
return b = n(b, k),
(b ^= m) < 0 && (b = 2147483648 + (2147483647 & b)),
"".concat((b %= 1e6).toString(), ".").concat(b ^ f)
}
py文件:
ef get_js_function(js_path,js_function,js_args=None):
with open(js_path,"r",encoding="utf-8")as f:
js=f.read()
#编译js文件
ret=execjs.compile(js)
#执行js中的函数
dem=ret.call(js_function,js_args)
print(dem)
return dem
# get_js_function("./demo.js","arr","你好")
execjs.compile(js)可以理解为创建一个对象
call(js的函数名,传入js函数的参数)
下面我再来一个例子:
https://ggzyfw.fujian.gov.cn/business/list/
由于前面我已经讲过了,小可爱可以套用,我们直接来到js加密
可以看出来这里加密的不是sign,而是response返回的数据进行了加密,
如果细心的小可爱也发现了,
这两个不一样,会造成我们访问失败,所以我们在遇见有Data的时候,post 请求就用data来接收,遇见Request就用json接收例如:requests.post(url,headers=header,json=data)
下面我写了一些代码爬取加密文件的:
请求头加密了
返回结果加密了
思路:加密发送请求头,解密获取数据
python文件:
import requests
import execjs
import time
from jsonpath import jsonpath
def main():
"""主要的业务逻辑"""
# url
url="https://ggzyfw.fujian.gov.cn/FwPortalApi/Trade/TradeInfo"
data={
'AREACODE':"",
'BeginTime':"2022-12-07 00:00:00",
'EndTime':"2023-06-07 23:59:59",
'GGTYPE':"1",
'KIND':"GCJS",
'M_PROJECT_TYPE':"",
'PROTYPE':"",
'createTime':[],
'pageNo':3,
'pageSize':20,
'timeType':"6",
'total':3537,
'ts':int(time.time()*1000)
}
def js_parth(js_path, js_function, js_args=None):
with open(js_path, "r", encoding="utf-8")as f:
js = f.read()
# 编译js文件
js_pa = execjs.compile(js,cwd=r"C:\Users\32288\WebstormProjects\untitled\node_modules\crypto-js")
# 运行js的函数
resuit = js_pa.call(js_function, js_args)
return resuit
ps = js_parth("./02.js", "d", data)
header = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36",
"Host": "ggzyfw.fujian.gov.cn",
"Origin": "https://ggzyfw.fujian.gov.cn",
"Referer": "https://ggzyfw.fujian.gov.cn/business/list/",
"Portal-Sign":ps,
"Content-Type": "application/json;charset=UTF-8",
"Accept": "application/json, text/plain, */*"
}
response=requests.post(url,headers=header,json=data)
# print(response.json())
# 创建一个json对象
path=jsonpath(response.json(),"$..Data")[0]
print(path)
data_html=js_parth("./jiemi.js","b",path)
print(data_html)
# 发送请求获取响应
# 数据的提取
# 保存
if __name__ == '__main__':
main()
js文件(加密版):
//导入
const CrypyoJS=require("crypto-js");
// import CryptoJS from "crypto-js";
data={
'AREACODE':"",
'BeginTime':"2022-12-07 00:00:00",
'EndTime':"2023-06-07 23:59:59",
'GGTYPE':"1",
'KIND':"GCJS",
'M_PROJECT_TYPE':"",
'PROTYPE':"",
'createTime':[],
'pageNo':3,
'pageSize':20,
'timeType':"6",
'total':3537,
'ts':new Date().getTime()//时间戳
}
//57e776a8c23455410734cca06cd62a38
//0f3aa7843dfec2c0ac67e2c66d1d6418
//4ff85b173651722cc354ce032b2de64d
// 7ca9c7f6af67a6c3585984c61c49b0a1
function u(t, e) {
return t.toString().toUpperCase() > e.toString().toUpperCase() ? 1 : t.toString().toUpperCase() == e.toString().toUpperCase() ? 0 : -1
}
function l(t) {
for (var e = Object.keys(t).sort(u), n = "", a = 0; a < e.length; a++)
if (void 0 !== t[e[a]])
if (t[e[a]] && t[e[a]]instanceof Object || t[e[a]]instanceof Array) {
var i = JSON.stringify(t[e[a]]);
n += e[a] + i
} else
n += e[a] + t[e[a]];
return n
}
function d(t) {
for (var e in t)
"" !== t[e] && void 0 !== t[e] || delete t[e];
var n = '3637CB36B2E54A72A7002978D0506CDF'+ l(t);
return CrypyoJS.MD5(n).toString()
}
// console.log(d(data))
js解密版:
const CryptoJS=require("crypto-js")
function b(t) {
var e = CryptoJS.enc.Utf8.parse('BE45D593014E4A4EB4449737660876CE')
, n =CryptoJS.enc.Utf8.parse('A8909931867B0425')
, a = CryptoJS.AES.decrypt(t, e, {
iv: n,
mode:CryptoJS.mode.CBC,
padding: CryptoJS.pad.Pkcs7
});
return a.toString(CryptoJS.enc.Utf8)
}
运行最终结果:
下面我来讲解一下问题所在:
以上就是我的介绍js逆向的内容了,