python爬取企名科技创业项目信息
前言
这篇文章讲的是一个具体的案例，涉及到的主要内容是得到的response内容加密后的怎么解密，这些信息应该是公开的吧（应该吧）
分析过程
①找到目标地址
经过查看，确认网页源代码中没有信息，意味着是AJAX异步加载的
经过查看确认目标地址
②分析表单数据
这个表单数据也没有什么好分析的了，已经很见名知意了，这里也不多页爬取了，就爬一页
③查看返回数据
返回数据的类型是json格式，数据内容是加密的
④尝试逆向分析
尝试着搜索encrypt_data，在第六个匹配项处看到一点希望
打个断点，经过四次调试，看到一点希望
这里有个JSON.parse()，还有个decode()函数，且参数t就是我们得到的所加密的内容
decode是解密，而解密的内容就是我们通过请求拿到的加密内容，答案已经呼之欲出了，这个函数是关键
⑤分析关键函数
这个关键函数中有两个函数，分别是s函数与decode()函数，而执行过程应该是先执行decode函数得到的返回结果，再参加s函数，s函数的返回结果再传入JSON.parse()返回解密后的内容，那么只需要补全s函数与decode函数就行了。
继续调试4次
这个是decode函数，把它抠出来，这里我们点跳出函数，因为下面有个循环
这个是s函数，很长，别抠错了
分析到这就已经差不多了，代码实现也不难
可能遇到的问题
这个错误可以通过安装node.js解决
这个错误可以修改decode函数名定义方式来解决，我单独拎出来了：python 使用execjs模块执行js脚本文件时报错：execjs._exceptions.ProcessExitedWithNonZeroStatus - Flower_and_you - 博客园 (cnblogs.com)
f是写死的内容，手动添加就好了，就是将制表、换行、换页、回车替换成空字符串
c也是写死的字符串，手动添加就好了
这两个错误，我没有太好的解决方法，所以我用了非常笨拙的方式，我把JSON.parse()给去了，然后使用python的json.loads()转成json
代码与结果展示
python代码
import json
import execjs
import requests
url = 'https://vipapi.qimingpian.cn/DataList/productListVip'
# url = 'https://vipapi.qimingpian.cn/Search/industryFieldVip'
headers = {
'Accept': 'application/json, text/plain, */*',
'Accept-Encoding': 'gzip, deflate, br',
'Accept-Language': 'zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6',
'Connection': 'keep-alive',
'Content-Length': '69',
'Content-Type': 'application/x-www-form-urlencoded',
'Host': 'vipapi.qimingpian.cn',
'Origin': 'https://www.qimingpian.cn',
'sec-ch-ua': '" Not A;Brand";v="99", "Chromium";v="101", "Microsoft Edge";v="101"',
'sec-ch-ua-mobile': '?0',
'sec-ch-ua-platform': '"Windows"',
'Sec-Fetch-Dest': 'empty',
'Sec-Fetch-Mode': 'cors',
'Sec-Fetch-Site': 'same-site',
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.36 Edg/101.0.1210.53',
}
data = {
'time_interval': '',
'tag': '',
'tag_type': '',
'province': '',
'lunci': '',
'page': '1',
'num': '20',
'unionid': '',
}
def get_qimingkeji(url, headers):
"""
获取企名科技的加密数据
:param url: 地址
:param headers: 请求头
:return: 加密数据
"""
response = requests.post(url=url, headers=headers, data=data)
data_json = response.json()
encrypt_data = data_json['encrypt_data']
return encrypt_data
def decrypt_data(encrypt_data):
"""
对加密数据进行解密
:param encrypt_data: 加密数据
:return: 解密数据
"""
js_file = 'encrypt_data.js'
with open(file=js_file, mode='r', encoding='utf-8') as f:
js_code = execjs.compile(f.read())
decryptData = js_code.call('o', encrypt_data)
return decryptData
def extract_data(decryptData):
"""
从解密数据汇总提取需要的内容
:param decryptData: 解密数据
:return: 需要的内容
"""
decryptData = json.loads(decryptData)
data_list = decryptData['list']
for data in data_list:
print('项目：' + data['product'])
print('业务：' + data['yewu'])
print('行业领域：' + data['hangye1'])
print('地区：' + data['province'])
print('投资轮次：' + data['lunci'])
print('投资时间：' + data['time'])
print('投资金额：' + data['money'])
investors = data['investor_info']
print('投资方：', end='')
for investor in investors:
print(investor['investor'] + '，', end='')
print()
print('=' * 50)
if __name__ == '__main__':
encrypt_data = get_qimingkeji(url=url, headers=headers)
decryptData = decrypt_data(encrypt_data=encrypt_data)
extract_data(decryptData=decryptData)JavaScript代码
function s(t, e, i, n, a, s) {
var o, c, r, l, u, d, h, p, f, v, m, g, b, y, _ = new Array(16843776,0,65536,16843780,16842756,66564,4,65536,1024,16843776,16843780,1024,16778244,16842756,16777216,4,1028,16778240,16778240,66560,66560,16842752,16842752,16778244,65540,16777220,16777220,65540,0,1028,66564,16777216,65536,16843780,4,16842752,16843776,16777216,16777216,1024,16842756,65536,66560,16777220,1024,4,16778244,66564,16843780,65540,16842752,16778244,16777220,1028,66564,16843776,1028,16778240,16778240,0,65540,66560,0,16842756), C = new Array(-2146402272,-2147450880,32768,1081376,1048576,32,-2146435040,-2147450848,-2147483616,-2146402272,-2146402304,-2147483648,-2147450880,1048576,32,-2146435040,1081344,1048608,-2147450848,0,-2147483648,32768,1081376,-2146435072,1048608,-2147483616,0,1081344,32800,-2146402304,-2146435072,32800,0,1081376,-2146435040,1048576,-2147450848,-2146435072,-2146402304,32768,-2146435072,-2147450880,32,-2146402272,1081376,32,32768,-2147483648,32800,-2146402304,1048576,-2147483616,1048608,-2147450848,-2147483616,1048608,1081344,0,-2147450880,32800,-2147483648,-2146435040,-2146402272,1081344), w = new Array(520,134349312,0,134348808,134218240,0,131592,134218240,131080,134217736,134217736,131072,134349320,131080,134348800,520,134217728,8,134349312,512,131584,134348800,134348808,131592,134218248,131584,131072,134218248,8,134349320,512,134217728,134349312,134217728,131080,520,131072,134349312,134218240,0,512,131080,134349320,134218240,134217736,512,0,134348808,134218248,131072,134217728,134349320,8,131592,131584,134217736,134348800,134218248,520,134348800,131592,8,134348808,131584), x = new Array(8396801,8321,8321,128,8396928,8388737,8388609,8193,0,8396800,8396800,8396929,129,0,8388736,8388609,1,8192,8388608,8396801,128,8388608,8193,8320,8388737,1,8320,8388736,8192,8396928,8396929,129,8388736,8388609,8396800,8396929,129,0,0,8396800,8320,8388736,8388737,1,8396801,8321,8321,128,8396929,129,1,8192,8388609,8193,8396928,8388737,8193,8320,8388608,8396801,128,8388608,8192,8396928), k = new Array(256,34078976,34078720,1107296512,524288,256,1073741824,34078720,1074266368,524288,33554688,1074266368,1107296512,1107820544,524544,1073741824,33554432,1074266112,1074266112,0,1073742080,1107820800,1107820800,33554688,1107820544,1073742080,0,1107296256,34078976,33554432,1107296256,524544,524288,1107296512,256,33554432,1073741824,34078720,1107296512,1074266368,33554688,1073741824,1107820544,34078976,1074266368,256,33554432,1107820544,1107820800,524544,1107296256,1107820800,34078720,0,1074266112,1107296256,524544,33554688,1073742080,524288,0,1074266112,34078976,1073742080), T = new Array(536870928,541065216,16384,541081616,541065216,16,541081616,4194304,536887296,4210704,4194304,536870928,4194320,536887296,536870912,16400,0,4194320,536887312,16384,4210688,536887312,16,541065232,541065232,0,4210704,541081600,16400,4210688,541081600,536870912,536887296,16,541065232,4210688,541081616,4194304,16400,536870928,4194304,536887296,536870912,16400,536870928,541081616,4210688,541065216,4210704,541081600,0,541065232,16,16384,541065216,4210704,16384,4194320,536887312,0,541081600,536870912,4194320,536887312), A = new Array(2097152,69206018,67110914,0,2048,67110914,2099202,69208064,69208066,2097152,0,67108866,2,67108864,69206018,2050,67110912,2099202,2097154,67110912,67108866,69206016,69208064,2097154,69206016,2048,2050,69208066,2099200,2,67108864,2099200,67108864,2099200,2097152,67110914,67110914,69206018,69206018,2,2097154,67108864,67110912,2097152,69208064,2050,2099202,69208064,2050,67108866,69208066,69206016,2099200,0,2,69208066,0,2099202,69206016,2048,67108866,67110912,2048,2097154), L = new Array(268439616,4096,262144,268701760,268435456,268439616,64,268435456,262208,268697600,268701760,266240,268701696,266304,4096,64,268697600,268435520,268439552,4160,266240,262208,268697664,268701696,4160,0,0,268697664,268435520,268439552,266304,262144,266304,262144,268701696,4096,64,268697664,4096,266304,268439552,64,268435520,268697600,268697664,268435456,262144,268439616,0,268701760,262208,268435520,268697600,268439552,268439616,0,268701760,266240,266240,4160,4160,262208,268435456,268701696), z = function(t) {
for (var e, i, n, a = new Array(0,4,536870912,536870916,65536,65540,536936448,536936452,512,516,536871424,536871428,66048,66052,536936960,536936964), s = new Array(0,1,1048576,1048577,67108864,67108865,68157440,68157441,256,257,1048832,1048833,67109120,67109121,68157696,68157697), o = new Array(0,8,2048,2056,16777216,16777224,16779264,16779272,0,8,2048,2056,16777216,16777224,16779264,16779272), c = new Array(0,2097152,134217728,136314880,8192,2105344,134225920,136323072,131072,2228224,134348800,136445952,139264,2236416,134356992,136454144), r = new Array(0,262144,16,262160,0,262144,16,262160,4096,266240,4112,266256,4096,266240,4112,266256), l = new Array(0,1024,32,1056,0,1024,32,1056,33554432,33555456,33554464,33555488,33554432,33555456,33554464,33555488), u = new Array(0,268435456,524288,268959744,2,268435458,524290,268959746,0,268435456,524288,268959744,2,268435458,524290,268959746), d = new Array(0,65536,2048,67584,536870912,536936448,536872960,536938496,131072,196608,133120,198656,537001984,537067520,537004032,537069568), h = new Array(0,262144,0,262144,2,262146,2,262146,33554432,33816576,33554432,33816576,33554434,33816578,33554434,33816578), p = new Array(0,268435456,8,268435464,0,268435456,8,268435464,1024,268436480,1032,268436488,1024,268436480,1032,268436488), f = new Array(0,32,0,32,1048576,1048608,1048576,1048608,8192,8224,8192,8224,1056768,1056800,1056768,1056800), v = new Array(0,16777216,512,16777728,2097152,18874368,2097664,18874880,67108864,83886080,67109376,83886592,69206016,85983232,69206528,85983744), m = new Array(0,4096,134217728,134221824,524288,528384,134742016,134746112,16,4112,134217744,134221840,524304,528400,134742032,134746128), g = new Array(0,4,256,260,0,4,256,260,1,5,257,261,1,5,257,261), b = t.length > 8 ? 3 : 1, y = new Array(32 * b), _ = new Array(0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0), C = 0, w = 0, x = 0; x < b; x++) {
var k = t.charCodeAt(C++) << 24 | t.charCodeAt(C++) << 16 | t.charCodeAt(C++) << 8 | t.charCodeAt(C++)
, T = t.charCodeAt(C++) << 24 | t.charCodeAt(C++) << 16 | t.charCodeAt(C++) << 8 | t.charCodeAt(C++);
k ^= (n = 252645135 & (k >>> 4 ^ T)) << 4,
k ^= n = 65535 & ((T ^= n) >>> -16 ^ k),
k ^= (n = 858993459 & (k >>> 2 ^ (T ^= n << -16))) << 2,
k ^= n = 65535 & ((T ^= n) >>> -16 ^ k),
k ^= (n = 1431655765 & (k >>> 1 ^ (T ^= n << -16))) << 1,
k ^= n = 16711935 & ((T ^= n) >>> 8 ^ k),
n = (k ^= (n = 1431655765 & (k >>> 1 ^ (T ^= n << 8))) << 1) << 8 | (T ^= n) >>> 20 & 240,
k = T << 24 | T << 8 & 16711680 | T >>> 8 & 65280 | T >>> 24 & 240,
T = n;
for (var A = 0; A < _.length; A++)
_[A] ? (k = k << 2 | k >>> 26,
T = T << 2 | T >>> 26) : (k = k << 1 | k >>> 27,
T = T << 1 | T >>> 27),
T &= -15,
e = a[(k &= -15) >>> 28] | s[k >>> 24 & 15] | o[k >>> 20 & 15] | c[k >>> 16 & 15] | r[k >>> 12 & 15] | l[k >>> 8 & 15] | u[k >>> 4 & 15],
i = d[T >>> 28] | h[T >>> 24 & 15] | p[T >>> 20 & 15] | f[T >>> 16 & 15] | v[T >>> 12 & 15] | m[T >>> 8 & 15] | g[T >>> 4 & 15],
n = 65535 & (i >>> 16 ^ e),
y[w++] = e ^ n,
y[w++] = i ^ n << 16
}
return y
}(t), S = 0, F = e.length, j = 0, I = 32 == z.length ? 3 : 9;
p = 3 == I ? i ? new Array(0,32,2) : new Array(30,-2,-2) : i ? new Array(0,32,2,62,30,-2,64,96,2) : new Array(94,62,-2,32,64,2,30,-2,-2),
2 == s ? e += " " : 1 == s ? i && (r = 8 - F % 8,
e += String.fromCharCode(r, r, r, r, r, r, r, r),
8 === r && (F += 8)) : s || (e += "\0\0\0\0\0\0\0\0");
var B = ""
, O = "";
for (1 == n && (f = a.charCodeAt(S++) << 24 | a.charCodeAt(S++) << 16 | a.charCodeAt(S++) << 8 | a.charCodeAt(S++),
m = a.charCodeAt(S++) << 24 | a.charCodeAt(S++) << 16 | a.charCodeAt(S++) << 8 | a.charCodeAt(S++),
S = 0); S < F; ) {
for (d = e.charCodeAt(S++) << 24 | e.charCodeAt(S++) << 16 | e.charCodeAt(S++) << 8 | e.charCodeAt(S++),
h = e.charCodeAt(S++) << 24 | e.charCodeAt(S++) << 16 | e.charCodeAt(S++) << 8 | e.charCodeAt(S++),
1 == n && (i ? (d ^= f,
h ^= m) : (v = f,
g = m,
f = d,
m = h)),
d ^= (r = 252645135 & (d >>> 4 ^ h)) << 4,
d ^= (r = 65535 & (d >>> 16 ^ (h ^= r))) << 16,
d ^= r = 858993459 & ((h ^= r) >>> 2 ^ d),
d ^= r = 16711935 & ((h ^= r << 2) >>> 8 ^ d),
d = (d ^= (r = 1431655765 & (d >>> 1 ^ (h ^= r << 8))) << 1) << 1 | d >>> 31,
h = (h ^= r) << 1 | h >>> 31,
c = 0; c < I; c += 3) {
for (b = p[c + 1],
y = p[c + 2],
o = p[c]; o != b; o += y)
l = h ^ z[o],
u = (h >>> 4 | h << 28) ^ z[o + 1],
r = d,
d = h,
h = r ^ (C[l >>> 24 & 63] | x[l >>> 16 & 63] | T[l >>> 8 & 63] | L[63 & l] | _[u >>> 24 & 63] | w[u >>> 16 & 63] | k[u >>> 8 & 63] | A[63 & u]);
r = d,
d = h,
h = r
}
h = h >>> 1 | h << 31,
h ^= r = 1431655765 & ((d = d >>> 1 | d << 31) >>> 1 ^ h),
h ^= (r = 16711935 & (h >>> 8 ^ (d ^= r << 1))) << 8,
h ^= (r = 858993459 & (h >>> 2 ^ (d ^= r))) << 2,
h ^= r = 65535 & ((d ^= r) >>> 16 ^ h),
h ^= r = 252645135 & ((d ^= r << 16) >>> 4 ^ h),
d ^= r << 4,
1 == n && (i ? (f = d,
m = h) : (d ^= v,
h ^= g)),
O += String.fromCharCode(d >>> 24, d >>> 16 & 255, d >>> 8 & 255, 255 & d, h >>> 24, h >>> 16 & 255, h >>> 8 & 255, 255 & h),
512 == (j += 8) && (B += O,
O = "",
j = 0)
}
if (B = (B += O).replace(/\0*$/g, ""),
!i) {
if (1 === s) {
var $ = 0;
(F = B.length) && ($ = B.charCodeAt(F - 1)),
$ <= 8 && (B = B.substring(0, F - $))
}
B = decodeURIComponent(escape(B))
}
return B
}
function MyDecode(t) {
var f = "[\\t\\n\\f\\r ]"
var c = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
var e = (t = String(t).replace(f, "")).length;
e % 4 == 0 && (e = (t = t.replace(/==?$/, "")).length),
(e % 4 == 1 || /[^+a-zA-Z0-9/]/.test(t)) && l("Invalid character: the string to be decoded is not correctly encoded.");
for (var n, r, i = 0, o = "", a = -1; ++a < e; )
r = c.indexOf(t.charAt(a)),
n = i % 4 ? 64 * n + r : r,
i++ % 4 && (o += String.fromCharCode(255 & n >> (-2 * i & 6)));
return o
}
//decode :function(t) {
// var f = "[\\t\\n\\f\\r ]"
// var c = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
// var e = (t = String(t).replace(f, "")).length;
// e % 4 == 0 && (e = (t = t.replace(/==?$/, "")).length),
// (e % 4 == 1 || /[^+a-zA-Z0-9/]/.test(t)) && l("Invalid character: the string to be decoded is not correctly encoded.");
// for (var n, r, i = 0, o = "", a = -1; ++a < e; )
// r = c.indexOf(t.charAt(a)),
// n = i % 4 ? 64 * n + r : r,
// i++ % 4 && (o += String.fromCharCode(255 & n >> (-2 * i & 6)));
// return o
//}
function o(t) {
return s("5e5062e82f15fe4ca9d24bc5", MyDecode(t), 0, 0, "012345677890123", 1)
}
//function o(t) {
// return JSON.parse(s("5e5062e82f15fe4ca9d24bc5", MyDecode(t), 0, 0, "012345677890123", 1))
//}
//function o(t) {
// return s("5e5062e82f15fe4ca9d24bc5", a.a.decode(t), 0, 0, "012345677890123", 1)
//}结果
尾声
如果这篇文章对您有所帮助，那么这篇文章就有意义！
感谢您的观看！
