Python3爬取淘宝网商品数据!

分析淘宝网

这次选择的是淘宝网热卖而不是淘宝网,二者虽然名字有不同,但是数据还是一样的,区别就在于前者把后者的所有店铺和商品的海量数据按照销售量、好评度、信誉度综合测评、重新计算、重新排序展现给买家的一个导购网站。

找到准确数据:

Python3爬取淘宝网商品数据!_第1张图片


请求参数对比:

Python3爬取淘宝网商品数据!_第2张图片

 

Python3爬取淘宝网商品数据!_第3张图片

jsv: 2.4.0
appKey: 12574478
t: 1597626852590
sign: 457c09a81147eb493d1f58ad6ab64d52
api: mtop.alimama.union.sem.landing.pc.items
v: 1.0
AntiCreep: true
dataType: jsonp
type: jsonp
ecode: 0
callback: mtopjsonp1
data: {"keyword":"女装","ppath":"","loc":"","minPrice":"","maxPrice":"","ismall":"","ship":"","itemAssurance":"","exch

jsv: 2.4.0

appKey: 12574478

t: 1597626856031

sign: 4a87f4308903ded469a1328275ded458

api: mtop.alimama.union.sem.landing.pc.items

v: 1.0

AntiCreep: true

dataType: jsonp

type: jsonp

ecode: 0

callback: mtopjsonp1

data: {"keyword":"女装","ppath":"","loc":"","minPrice":"","maxPrice":"","ismall":"","ship":"","itemAssurance":"","exchange7":"","custAssurance":"","b":"","clk1":"91a160066daf9f8b69646bd610341da7","pvoff":"","pageSize":"100","page":"","elemtid":"1","refpid":"mm_26632258_3504122_32538762","pid":"430673_1006","featureNames":"spGoldMedal,dsrDescribe,dsrDescribeGap,dsrService,dsrServiceGap,dsrDeliver, dsrDeliverGap","ac":"5TGcF6nyjHkCAXt4MaK1QH5c","wangwangid":"","catId":""}

发现请求数据有所改变的地方只有t和sign以及data中的page和ac,其他均没有发生改变,t参数明眼就能猜出是时间戳,sign参数还得通过调试和阅读源码进行逆向分析。

解决t和sign参数

发现sign和t以及其他参数都在这里面构造的。

Python3爬取淘宝网商品数据!_第4张图片


所以我们现在开始下断点调试这些参数,得出sign参数的构造过程。可以发现t就是当前时间戳,然后sign是由h(d.token + "&" + i + "&" + g + "&" + c.data)构成,d.token是this.options.token也就是cookie值中的_m_h5_tk参数的前部分,i是时间戳,g就是12574478,c.data就是this.params.data。

this.options.token = e4a0bbef377f5792e1852f92581f769c(参考值)

this.params.data = {"keyword":"女装","ppath":"","loc":"","minPrice":"","maxPrice":"","ismall":"","ship":"","itemAssurance":"","exchange7":"","custAssurance":"","b":"","clk1":"91a160066daf9f8b69646bd610341da7","pvoff":"","pageSize":"100","page":"","elemtid":"1","refpid":"mm_26632258_3504122_32538762","pid":"430673_1006","featureNames":"spGoldMedal,dsrDescribe,dsrDescribeGap,dsrService,dsrServiceGap,dsrDeliver, dsrDeliverGap","ac":"5TGcF6nyjHkCAXt4MaK1QH5c","wangwangid":"","catId":""}

Python3爬取淘宝网商品数据!_第5张图片


h函数就是下图所示。

Python3爬取淘宝网商品数据!_第6张图片

function h(a) {
     function b(a, b) {
         return a << b | a >>> 32 - b
     }
     function c(a, b) {
         var c, d, e, f, g;
         return e = 2147483648 & a,
         f = 2147483648 & b,
         c = 1073741824 & a,
         d = 1073741824 & b,
         g = (1073741823 & a) + (1073741823 & b),
         c & d ? 2147483648 ^ g ^ e ^ f : c | d ? 1073741824 & g ? 3221225472 ^ g ^ e ^ f : 1073741824 ^ g ^ e ^ f : g ^ e ^ f
     }
     function d(a, b, c) {
         return a & b | ~a & c
     }
     function e(a, b, c) {
         return a & c | b & ~c
     }
     function f(a, b, c) {
         return a ^ b ^ c
     }
     function g(a, b, c) {
         return b ^ (a | ~c)
     }
     function h(a, e, f, g, h, i, j) {
         return a = c(a, c(c(d(e, f, g), h), j)),
         c(b(a, i), e)
     }
     function i(a, d, f, g, h, i, j) {
         return a = c(a, c(c(e(d, f, g), h), j)),
         c(b(a, i), d)
     }
     function j(a, d, e, g, h, i, j) {
         return a = c(a, c(c(f(d, e, g), h), j)),
         c(b(a, i), d)
     }
     function k(a, d, e, f, h, i, j) {
         return a = c(a, c(c(g(d, e, f), h), j)),
         c(b(a, i), d)
     }
     function l(a) {
         for (var b, c = a.length, d = c + 8, e = (d - d % 64) / 64, f = 16 * (e + 1), g = new Array(f - 1), h = 0, i = 0; c > i; )
             b = (i - i % 4) / 4,
             h = i % 4 * 8,
             g[b] = g[b] | a.charCodeAt(i) << h,
             i++;
         return b = (i - i % 4) / 4,
         h = i % 4 * 8,
         g[b] = g[b] | 128 << h,
         g[f - 2] = c << 3,
         g[f - 1] = c >>> 29,
         g
     }
     function m(a) {
         var b, c, d = "", e = "";
         for (c = 0; 3 >= c; c++)
             b = a >>> 8 * c & 255,
             e = "0" + b.toString(16),
             d += e.substr(e.length - 2, 2);
         return d
     }
     function n(a) {
         a = a.replace(/\r\n/g, "\n");
         for (var b = "", c = 0; c < a.length; c++) {
             var d = a.charCodeAt(c);
             128 > d ? b += String.fromCharCode(d) : d > 127 && 2048 > d ? (b += String.fromCharCode(d >> 6 | 192),
             b += String.fromCharCode(63 & d | 128)) : (b += String.fromCharCode(d >> 12 | 224),
             b += String.fromCharCode(d >> 6 & 63 | 128),
             b += String.fromCharCode(63 & d | 128))
         }
         return b
     }
     var o, p, q, r, s, t, u, v, w, x = [], y = 7, z = 12, A = 17, B = 22, C = 5, D = 9, E = 14, F = 20, G = 4, H = 11, I = 16, J = 23, K = 6, L = 10, M = 15, N = 21;
     for (a = n(a),
     x = l(a),
     t = 1732584193,
     u = 4023233417,
     v = 2562383102,
     w = 271733878,
     o = 0; o < x.length; o += 16)
         p = t,
         q = u,
         r = v,
         s = w,
         t = h(t, u, v, w, x[o + 0], y, 3614090360),
         w = h(w, t, u, v, x[o + 1], z, 3905402710),
         v = h(v, w, t, u, x[o + 2], A, 606105819),
         u = h(u, v, w, t, x[o + 3], B, 3250441966),
         t = h(t, u, v, w, x[o + 4], y, 4118548399),
         w = h(w, t, u, v, x[o + 5], z, 1200080426),
         v = h(v, w, t, u, x[o + 6], A, 2821735955),
         u = h(u, v, w, t, x[o + 7], B, 4249261313),
         t = h(t, u, v, w, x[o + 8], y, 1770035416),
         w = h(w, t, u, v, x[o + 9], z, 2336552879),
         v = h(v, w, t, u, x[o + 10], A, 4294925233),
         u = h(u, v, w, t, x[o + 11], B, 2304563134),
         t = h(t, u, v, w, x[o + 12], y, 1804603682),
         w = h(w, t, u, v, x[o + 13], z, 4254626195),
         v = h(v, w, t, u, x[o + 14], A, 2792965006),
         u = h(u, v, w, t, x[o + 15], B, 1236535329),
         t = i(t, u, v, w, x[o + 1], C, 4129170786),
         w = i(w, t, u, v, x[o + 6], D, 3225465664),
         v = i(v, w, t, u, x[o + 11], E, 643717713),
         u = i(u, v, w, t, x[o + 0], F, 3921069994),
         t = i(t, u, v, w, x[o + 5], C, 3593408605),
         w = i(w, t, u, v, x[o + 10], D, 38016083),
         v = i(v, w, t, u, x[o + 15], E, 3634488961),
         u = i(u, v, w, t, x[o + 4], F, 3889429448),
         t = i(t, u, v, w, x[o + 9], C, 568446438),
         w = i(w, t, u, v, x[o + 14], D, 3275163606),
         v = i(v, w, t, u, x[o + 3], E, 4107603335),
         u = i(u, v, w, t, x[o + 8], F, 1163531501),
         t = i(t, u, v, w, x[o + 13], C, 2850285829),
         w = i(w, t, u, v, x[o + 2], D, 4243563512),
         v = i(v, w, t, u, x[o + 7], E, 1735328473),
         u = i(u, v, w, t, x[o + 12], F, 2368359562),
         t = j(t, u, v, w, x[o + 5], G, 4294588738),
         w = j(w, t, u, v, x[o + 8], H, 2272392833),
         v = j(v, w, t, u, x[o + 11], I, 1839030562),
         u = j(u, v, w, t, x[o + 14], J, 4259657740),
         t = j(t, u, v, w, x[o + 1], G, 2763975236),
         w = j(w, t, u, v, x[o + 4], H, 1272893353),
         v = j(v, w, t, u, x[o + 7], I, 4139469664),
         u = j(u, v, w, t, x[o + 10], J, 3200236656),
         t = j(t, u, v, w, x[o + 13], G, 681279174),
         w = j(w, t, u, v, x[o + 0], H, 3936430074),
         v = j(v, w, t, u, x[o + 3], I, 3572445317),
         u = j(u, v, w, t, x[o + 6], J, 76029189),
         t = j(t, u, v, w, x[o + 9], G, 3654602809),
         w = j(w, t, u, v, x[o + 12], H, 3873151461),
         v = j(v, w, t, u, x[o + 15], I, 530742520),
         u = j(u, v, w, t, x[o + 2], J, 3299628645),
         t = k(t, u, v, w, x[o + 0], K, 4096336452),
         w = k(w, t, u, v, x[o + 7], L, 1126891415),
         v = k(v, w, t, u, x[o + 14], M, 2878612391),
         u = k(u, v, w, t, x[o + 5], N, 4237533241),
         t = k(t, u, v, w, x[o + 12], K, 1700485571),
         w = k(w, t, u, v, x[o + 3], L, 2399980690),
         v = k(v, w, t, u, x[o + 10], M, 4293915773),
         u = k(u, v, w, t, x[o + 1], N, 2240044497),
         t = k(t, u, v, w, x[o + 8], K, 1873313359),
         w = k(w, t, u, v, x[o + 15], L, 4264355552),
         v = k(v, w, t, u, x[o + 6], M, 2734768916),
         u = k(u, v, w, t, x[o + 13], N, 1309151649),
         t = k(t, u, v, w, x[o + 4], K, 4149444226),
         w = k(w, t, u, v, x[o + 11], L, 3174756917),
         v = k(v, w, t, u, x[o + 2], M, 718787259),
         u = k(u, v, w, t, x[o + 9], N, 3951481745),
         t = c(t, p),
         u = c(u, q),
         v = c(v, r),
         w = c(w, s);
     var O = m(t) + m(u) + m(v) + m(w);
     return O.toLowerCase()
 }

发现这个h函数就是个md5加密方式,这样的话也就太容易了。

Python3爬取淘宝网商品数据!_第7张图片

 

Python3爬取淘宝网商品数据!_第8张图片

解决page和ac参数

page参数一看就知道是页数了,第一页为空,第二页为2,如:访问第一页时,page:"",访问第二页时,page:"2",后面以此类推。

ac参数就是我们cookie值中的cna参数值,cna参数值得访问网站获得https://log.mmstat.com/eg.js,获得
代码如下:

import requests

session = requests.Session()
headers = {
   'authority': 'log.mmstat.com',
   'method': 'GET',
   'path': '/eg.js',
   'scheme': 'https',
   'accept': '*/*',
   'accept-encoding': 'gzip, deflate, br',
   'accept-language': 'zh-CN,zh;q=0.9',
   'referer': "https://uland.taobao.com/sem/tbsearch?spm=a2e15.8261149.07626516003.1.7ab029b4ZS1aM4&refpid=mm_26632258_3504122_32538762&keyword=%E6%B7%98%E5%AE%9D&clk1=f1a5efd94339f0e6e7cba63ed79b8554&upsid=f1a5efd94339f0e6e7cba63ed79b8554&page=2&_input_charset=utf-8",
   'sec-fetch-dest': 'script',
   'sec-fetch-mode': 'no-cors',
   'sec-fetch-site': 'cross-site',
   'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36'
}
session.get('https://log.mmstat.com/eg.js', headers=headers)
print(session.cookies.get('cna'))



发现这个h函数就是个md5加密方式,这样的话也就太容易了。

在这里插入图片描述
在这里插入图片描述

解决page和ac参数
page参数一看就知道是页数了,第一页为空,第二页为2,如:访问第一页时,page:"",访问第二页时,page:"2",后面以此类推。

ac参数就是我们cookie值中的cna参数值,cna参数值得访问网站获得https://log.mmstat.com/eg.js,获得
代码如下:

import requests

session = requests.Session()
headers = {
   'authority': 'log.mmstat.com',
   'method': 'GET',
   'path': '/eg.js',
   'scheme': 'https',
   'accept': '*/*',
   'accept-encoding': 'gzip, deflate, br',
   'accept-language': 'zh-CN,zh;q=0.9',
   'referer': "https://uland.taobao.com/sem/tbsearch?spm=a2e15.8261149.07626516003.1.7ab029b4ZS1aM4&refpid=mm_26632258_3504122_32538762&keyword=%E6%B7%98%E5%AE%9D&clk1=f1a5efd94339f0e6e7cba63ed79b8554&upsid=f1a5efd94339f0e6e7cba63ed79b8554&page=2&_input_charset=utf-8",
   'sec-fetch-dest': 'script',
   'sec-fetch-mode': 'no-cors',
   'sec-fetch-site': 'cross-site',
   'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36'
}
session.get('https://log.mmstat.com/eg.js', headers=headers)
print(session.cookies.get('cna'))

Python3爬取淘宝网商品数据!_第9张图片

有人可能说我为什么会知道这些,因为我认真的分析了整个网站,这个部分的分析过程就不放出来了。

Python进行爬取

前面已经分析了整个网站了,废话不多说了,直接开始上开始上全代码了,复制过去就可以直接运行的代码,淘宝对每个结果最多只显示100页,所以这里也只有100页,如果你需要搜索的与我的不同自己直接修改即可。

import hashlib
import time
import requests
from urllib import parse
import json

class TaoBao():

    def __init__(self,keyword):
        self.keyword = keyword
        self.session = requests.Session()
        self.cookies = {}
        self.data = {}
        self.params = {}
        self.headers = {}
        for page in range(1,100+1):
            if page == 1:
                self.get_url()
                self.get_m_h5_tk()
                self.get_cna()
                self.get_data(page)
            else:
                self.get_data(page)

    def to_cookie(self):
        cookie = ''
        for key, value in self.cookies.items():
            if '_m_h5' in key or 'cna' == key:
                cookie += key + '=' + value + '; '
        return cookie

    def h(self,a):
        md5 = hashlib.md5()
        md5.update(a.encode())
        return md5.hexdigest()

    # 获取uland地址和clk1值
    def get_url(self):
        headers = {
            "Host":"redirect.simba.taobao.com",
            "Upgrade-Insecure-Requests":"1",
            "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36",
            "Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
            "Accept-Encoding":"gzip, deflate",
            "Accept-Language":"zh-CN,zh;q=0.9",
            "Connection":"keep-alive"
        }
        url = 'http://redirect.simba.taobao.com/rd?c=un&w=unionsem&k=74175f13c74157df&p=mm_26632258_3504122_32538762&b=R9JQC0peugGMqgRlL5O&s={keyword}&f=https%3A%2F%2Fuland.taobao.com%2Fsem%2Ftbsearch%3Frefpid%3Dmm_26632258_3504122_32538762%26keyword{keywords}'.format(keyword=parse.quote(self.keyword),keywords=parse.quote(parse.quote('='+self.keyword)))
        response = self.session.get(url,headers=headers,allow_redirects=False)
        self.clk1 = response.headers.get('Location').split('&')[2]
        self.uland_url = response.headers.get('Location')

    # 获取_m_h5_tk和_m_h5_tk_enc
    def get_m_h5_tk(self):
        self.data = {
            "keyword": self.keyword,
            "ppath": "", "loc": "",
            "minPrice": "",
            "maxPrice": "",
            "ismall": "",
            "ship": "",
            "itemAssurance": "",
            "exchange7": "",
            "custAssurance": "",
            "b": "",
            "clk1": self.clk1,
            "pvoff": "",
            "pageSize": "100",
            "page": "",
            "elemtid": "1",
            "refpid": "mm_26632258_3504122_32538762",
            "pid": "430673_1006",
            "featureNames": "spGoldMedal,dsrDescribe,dsrDescribeGap,dsrService,dsrServiceGap,dsrDeliver, dsrDeliverGap",
            "ac": "",
            "wangwangid": "",
            "catId": ""
        }
        self.timestamp = str(time.time()).replace('.', '')[:13]
        self.params = {
            'jsv': '2.4.0',
            'appKey': '12574478',
            't': self.timestamp,
            'sign': self.h('undefined' + "&" + self.timestamp + "&" + '12574478' + "&" + json.dumps(self.data,ensure_ascii=False).replace(' ', '')),
            'api': 'mtop.alimama.union.sem.landing.pc.items',
            'v': '1.0',
            'AntiCreep': 'true',
            'dataType': 'jsonp',
            'type': 'jsonp',
            'ecode': '0',
            'callback': 'mtopjsonp1',
            'data': json.dumps(self.data, ensure_ascii=False).replace(' ', '')
        }
        self.headers = {
            'host': 'h5api.m.taobao.com',
            'accept': '*/*',
            'accept-encoding': 'gzip, deflate, br',
            'accept-language': 'zh-Hans-CN, zh-Hans; q=0.8, en-US; q=0.5, en; q=0.3',
            'referer': self.uland_url,
            'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36',
        }
        self.session.get('https://h5api.m.taobao.com' + '/h5/mtop.alimama.union.sem.landing.pc.items/1.0/?' + parse.urlencode(self.params), headers=self.headers)
        for key, value in self.session.cookies.items():
            self.cookies[key] = value
        self.token = self.cookies['_m_h5_tk'].split('_')[0]

    # 获取cna
    def get_cna(self):
        headers = {
            'authority': 'log.mmstat.com',
            'method': 'GET',
            'path': '/eg.js',
            'scheme': 'https',
            'accept': '*/*',
            'accept-encoding': 'gzip, deflate, br',
            'accept-language': 'zh-CN,zh;q=0.9',
            'referer': self.uland_url,
            'sec-fetch-dest': 'script',
            'sec-fetch-mode': 'no-cors',
            'sec-fetch-site': 'cross-site',
            'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36'
        }
        self.session.get('https://log.mmstat.com/eg.js', headers=headers)
        for key, value in self.session.cookies.items():
            self.cookies[key] = value

    # 获取数据
    def get_data(self, page):
        self.data['page'] = "" if page == 1 else page
        self.data['ac'] = "" if page == 1 else self.cookies.get('cna')
        self.timestamp = str(time.time()).replace('.', '')[:13]
        self.params['t'] = self.timestamp
        self.params['sign'] = self.h(self.token + "&" + self.timestamp + "&" + '12574478' + "&" + json.dumps(self.data,ensure_ascii=False).replace(' ',''))
        self.params['data'] = json.dumps(self.data, ensure_ascii=False).replace(' ', '')
        self.headers['cookie'] = self.to_cookie()
        response = self.session.get('https://h5api.m.taobao.com' + '/h5/mtop.alimama.union.sem.landing.pc.items/1.0/?' + parse.urlencode(self.params), headers=self.headers)
        json_data = json.loads(response.text.replace('mtopjsonp1(','').replace(')',''))
        print(json_data)

if __name__ == '__main__':
    TaoBao('男装')		# 搜索关键词

Python3爬取淘宝网商品数据!_第10张图片

 

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