tm-mobie.py

# -*- coding: utf-8 -*-
import requests
import json
import csv
import random
import re
from datetime import datetime
import time

class TM_producs(object):
    def __init__(self,storename):
        self.storename = storename
        self.url = 'https://{}.m.tmall.com'.format(storename)
        self.headers = {
            "user-agent":"Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 "
                         "(KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1"
        }
        datenum = datetime.now().strftime('%Y%m%d%H%M')
        self.filename = '{}_{}.csv'.format(self.storename, datenum)
        self.get_file()

    def get_file(self):
        '''创建一个含有标题的表格'''
        title = ['item_id','price','quantity','sold','title','totalSoldQuantity','url','img']
        with open(self.filename,'w',newline='') as f:
            writer = csv.DictWriter(f,fieldnames=title)
            writer.writeheader()
        return

    def get_totalpage(self):
        '''提取总页码数'''
        num = random.randint(83739921,87739530)
        endurl = '/shop/shop_auction_search.do?sort=s&p=1&page_size=12&from=h5&ajson=1&_tm_source=tmallsearch&callback=jsonp_{}'
        url = self.url + endurl.format(num)
        html = requests.get(url,headers=self.headers).text
        infos = re.findall('\(({.*})\)',html)[0]
        infos = json.loads(infos)
        totalpage = infos.get('total_page')
        return int(totalpage)

    def get_products(self,page):
        '''提取单页商品列表'''
        num = random.randint(83739921, 87739530)
        endurl = '/shop/shop_auction_search.do?sort=s&p={}&page_size=12&from=h5&ajson=1&_tm_source=tmallsearch&callback=jsonp_{}'
        url = self.url + endurl.format(page,num)
        html = requests.get(url, headers=self.headers).text
        infos = re.findall('\(({.*})\)', html)[0]
        infos = json.loads(infos)
        products = infos.get('items')
        title = ['item_id', 'price', 'quantity', 'sold', 'title', 'totalSoldQuantity', 'url', 'img']
        with open(self.filename, 'a', newline='') as f:
            writer = csv.DictWriter(f, fieldnames=title)
            writer.writerows(products)

    def main(self):
        '''循环爬取所有页面宝贝'''
        total_page = self.get_totalpage()
        for i in range(1,total_page+1):
            self.get_products(i)
            print('总计{}页商品，已经提取第{}页'.format(total_page,i))
            time.sleep(1+random.random())

if __name__ == '__main__':
    storename = 'uniqlo'
    tm = TM_producs(storename)
    tm.main()