不如通过案例来了解如何部署scrapy-redis

谁践踏了优雅 2022-12-06 12:38 160阅读 0赞

# 淘车网—>scrapy #

## 目录 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ExMzA5NTI1ODAy_size_16_color_FFFFFF_t_70_pic_center]

## 步骤 ##

### (一) 设置settings.py ###

![在这里插入图片描述][2020091308575196.png_pic_center]

import hashlib
    
    CUSTOM_SETTINGS = { 
        # robotes协议
        'ROBOTSTXT_OBEY': False,
        # 请求头
        'DEFAULT_REQUEST_HEADERS': { 
            'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
            'Accept-Language': 'en',
            'user-agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36 Maxthon/5.2.6.1000',
        },
        # 下载中间件
        # 'DOWNLOADER_MIDDLEWARES': { 
        # 'hupu.middlewares.HupuDownloaderMiddleware': 543,
        # },
        #pipelines
        'ITEM_PIPELINES' : { 
            'taoche.pipelines.TaochePipeline': 300,
        },
        #数据库的url
        'MONGO_URI':'localhost',
        #数据的名字
        'MONGO_DATABASE':'taoche',
    }
    
    
    def get_md5(value):
        return hashlib.md5(bytes(value, encoding='utf-8')).hexdigest()
    def update_to_mongo(db,collectionName,id,url,item):
        if url:
            item[id] = get_md5(item[url])
        db[collectionName].update({ id: item[id]}, { '$set': dict(item)}, True)
        print("正在存储..........")
    def add_page(m):
        return '?page='+str(int(m.group(1))+1)

### (二)导入url ###

![在这里插入图片描述][20200913085519371.png_pic_center]

CITY_CODE = [
        'hefei', 'anqing', 'bengbu', 'chaohu', 'chizhou', 'fuyang', 'huainan', 'luan', 'maanshan', 'tongling', 'wuhu',
        'xuancheng', 'chuzhou', 'sz', 'bozhou', 'huaibei', 'huangshan', 'beijing', 'chongqing', 'fuzhou', 'xiamen',
        'longyan', 'zhangzhou', 'putian', 'quanzhou', 'nanping', 'ningde', 'sanming', 'guangzhou', 'shenzhen', 'zhuhai',
        'dongguan', 'zhongshan', 'shantou', 'shaoguan', 'zhaoqing', 'maoming', 'foshan', 'huizhou', 'jiangmen', 'qingyuan',
        'chaozhou', 'zhanjiang', 'meizhou', 'jieyang', 'yunfu', 'yangjiang', 'heyuan', 'shanwei', 'nanning', 'liuzhou',
        'guilin', 'beihai', 'baise', 'hezhou', 'hechi', 'guigang', 'yulin', 'qinzhou', 'wuzhou', 'fangchenggang', 'laibin',
        'chongzuo', 'guiyang', 'zunyi', 'anshun', 'liupanshui', 'tongrendiqu', 'qiandongnan', 'qiannan', 'bijiediqu',
        'qianxinan', 'lanzhou', 'dingxi', 'pingliang', 'jiuquan', 'qingyang', 'baiyin', 'zhangye', 'wuwei', 'tianshui',
        'jiayuguan', 'jinchang', 'linxia', 'longnan', 'gannan', 'haikou', 'sanya', 'sanshashi', 'wuhan', 'shiyan',
        'xiangfan', 'suizhou', 'yichang', 'huangshi', 'jingmen', 'jingzhou', 'ezhou', 'xianning', 'xiaogan', 'huanggang',
        'enshi', 'xiantao', 'tianmen', 'qianjiang', 'hubeizhixiaxian', 'changsha', 'chenzhou', 'changde', 'hengyang',
        'huaihua', 'loudi', 'zhuzhou', 'yueyang', 'xiangtan', 'shaoyang', 'yongzhou', 'yiyang', 'zhangjiajie', 'xiangxi',
        'zhengzhou', 'luoyang', 'zhoukou', 'xinyang', 'xinxiang', 'shangqiu', 'sanmenxia', 'puyang', 'nanyang', 'luohe',
        'jiaozuo', 'kaifeng', 'anyang', 'hebi', 'pingdingshan', 'zhumadian', 'xuchang', 'jiyuan', 'henanzhixiaxian',
        'shijiazhuang', 'tangshan', 'xingtai', 'qinhuangdao', 'langfang', 'handan', 'hengshui', 'cangzhou', 'baoding',
        'zhangjiakou', 'chengde', 'haerbin', 'daqing', 'qiqihaer', 'hegang', 'jiamusi', 'mudanjiang', 'jixi', 'qitaihe',
        'yc', 'heihe', 'shuangyashan', 'suihua', 'daxinganlingdiqu', 'nanjing', 'suzhou', 'wuxi', 'changzhou', 'huaian',
        'lianyungang', 'nantong', 'yancheng', 'yangzhou', 'zhenjiang', 'taizhou', 'xuzhou', 'suqian', 'nanchang',
        'shangrao', 'pingxiang', 'xinyu', 'yichun', 'jiujiang', 'ganzhou', 'jian', 'jingdezhen', 'jxfz', 'yingtan',
        'changchun', 'jilin', 'tonghua', 'liaoyuan', 'songyuan', 'yanbian', 'siping', 'baishan', 'baicheng', 'shenyang',
        'dalian', 'dandong', 'fushun', 'fuxin', 'huludao', 'chaoyang', 'benxi', 'anshan', 'jinzhou', 'liaoyang', 'yingkou',
        'panjin', 'tieling', 'huhehaote', 'baotou', 'chifeng', 'tongliao', 'wuhai', 'eerduosi', 'bayannaoer', 'wulanchabu',
        'xilinguolemeng', 'hulunbeier', 'xinganmeng', 'alashanmeng', 'yinchuan', 'zhongwei', 'wuzhong', 'guyuan',
        'shizuishan', 'xining', 'haibei', 'huangnan', 'guoluo', 'yushu', 'haixi', 'haidongdiqu', 'hainanzangzuzizhizho',
        'xian', 'xianyang', 'weinan', 'yl', 'baoji', 'hanzhong', 'yanan', 'tongchuan', 'shangluo', 'ankang', 'shanghai',
        'taiyuan', 'datong', 'jincheng', 'linfen', 'changzhi', 'yuncheng', 'xinzhou', 'shuozhou', 'lvliang', 'jinzhong',
        'yangquan', 'chengdu', 'mianyang', 'suining', 'panzhihua', 'yibin', 'zigong', 'ziyang', 'deyang', 'leshan',
        'nanchong', 'meishan', 'bazhong', 'luzhou', 'neijiang', 'dazhou', 'yaan', 'guangyuan', 'guangan', 'aba', 'ganzi',
        'liangshan', 'jinan', 'dezhou', 'qingdao', 'yantai', 'weihai', 'weifang', 'taian', 'zaozhuang', 'zibo', 'dongying',
        'heze', 'binzhou', 'liaocheng', 'linyi', 'jining', 'rizhao', 'laiwu', 'tianjin', 'wulumuqi', 'kelamayi', 'bazhou',
        'yili', 'kashidiqu', 'akesudiqu', 'hetiandiqu', 'tachengdiqu', 'tulufandiqu', 'hamidiqu', 'aletaidiqu',
        'xinjiangkezhou', 'changji', 'shihezi', 'xinjiangzhixiaxian', 'lasa', 'rikazediqu', 'shannan', 'kunming', 'qujing',
        'baoshan', 'xishuangbanna', 'honghe', 'dali', 'yuxi', 'lincang', 'wenshan', 'zhaotong', 'lijiang', 'dehong',
        'nujiang', 'diqing', 'puer', 'chuxiong', 'hangzhou', 'ningbo', 'wenzhou', 'jiaxing', 'jinhua', 'lishui', 'huzhou',
        'quzhou', 'tz', 'shaoxing', 'yiwu', 'zhoushan', 'hefei', 'anqing', 'bengbu', 'chaohu', 'chizhou', 'fuyang',
        'huainan', 'luan', 'maanshan', 'tongling', 'wuhu', 'xuancheng', 'chuzhou', 'sz', 'bozhou', 'huaibei', 'huangshan',
        'beijing', 'chongqing', 'fuzhou', 'xiamen', 'longyan', 'zhangzhou', 'putian', 'quanzhou', 'nanping', 'ningde',
        'sanming', 'guangzhou', 'shenzhen', 'zhuhai', 'dongguan', 'zhongshan', 'shantou', 'shaoguan', 'zhaoqing', 'maoming',
        'foshan', 'huizhou', 'jiangmen', 'qingyuan', 'chaozhou', 'zhanjiang', 'meizhou', 'jieyang', 'yunfu', 'yangjiang',
        'heyuan', 'shanwei', 'nanning', 'liuzhou', 'guilin', 'beihai', 'baise', 'hezhou', 'hechi', 'guigang', 'yulin',
        'qinzhou', 'wuzhou', 'fangchenggang', 'laibin', 'chongzuo', 'guiyang', 'zunyi', 'anshun', 'liupanshui',
        'tongrendiqu', 'qiandongnan', 'qiannan', 'bijiediqu', 'qianxinan', 'lanzhou', 'dingxi', 'pingliang', 'jiuquan',
        'qingyang', 'baiyin', 'zhangye', 'wuwei', 'tianshui', 'jiayuguan', 'jinchang', 'linxia', 'longnan', 'gannan',
        'haikou', 'sanya', 'sanshashi', 'wuhan', 'shiyan', 'xiangfan', 'suizhou', 'yichang', 'huangshi', 'jingmen',
        'jingzhou', 'ezhou', 'xianning', 'xiaogan', 'huanggang', 'enshi', 'xiantao', 'tianmen', 'qianjiang',
        'hubeizhixiaxian', 'changsha', 'chenzhou', 'changde', 'hengyang', 'huaihua', 'loudi', 'zhuzhou', 'yueyang',
        'xiangtan', 'shaoyang', 'yongzhou', 'yiyang', 'zhangjiajie', 'xiangxi', 'zhengzhou', 'luoyang', 'zhoukou',
        'xinyang', 'xinxiang', 'shangqiu', 'sanmenxia', 'puyang', 'nanyang', 'luohe', 'jiaozuo', 'kaifeng', 'anyang',
        'hebi', 'pingdingshan', 'zhumadian', 'xuchang', 'jiyuan', 'henanzhixiaxian', 'shijiazhuang', 'tangshan', 'xingtai',
        'qinhuangdao', 'langfang', 'handan', 'hengshui', 'cangzhou', 'baoding', 'zhangjiakou', 'chengde', 'haerbin',
        'daqing', 'qiqihaer', 'hegang', 'jiamusi', 'mudanjiang', 'jixi', 'qitaihe', 'yc', 'heihe', 'shuangyashan', 'suihua',
        'daxinganlingdiqu', 'nanjing', 'suzhou', 'wuxi', 'changzhou', 'huaian', 'lianyungang', 'nantong', 'yancheng',
        'yangzhou', 'zhenjiang', 'taizhou', 'xuzhou', 'suqian', 'nanchang', 'shangrao', 'pingxiang', 'xinyu', 'yichun',
        'jiujiang', 'ganzhou', 'jian', 'jingdezhen', 'jxfz', 'yingtan', 'changchun', 'jilin', 'tonghua', 'liaoyuan',
        'songyuan', 'yanbian', 'siping', 'baishan', 'baicheng', 'shenyang', 'dalian', 'dandong', 'fushun', 'fuxin',
        'huludao', 'chaoyang', 'benxi', 'anshan', 'jinzhou', 'liaoyang', 'yingkou', 'panjin', 'tieling', 'huhehaote',
        'baotou', 'chifeng', 'tongliao', 'wuhai', 'eerduosi', 'bayannaoer', 'wulanchabu', 'xilinguolemeng', 'hulunbeier',
        'xinganmeng', 'alashanmeng', 'yinchuan', 'zhongwei', 'wuzhong', 'guyuan', 'shizuishan', 'xining', 'haibei',
        'huangnan', 'guoluo', 'yushu', 'haixi', 'haidongdiqu', 'hainanzangzuzizhizho', 'xian', 'xianyang', 'weinan', 'yl',
        'baoji', 'hanzhong', 'yanan', 'tongchuan', 'shangluo', 'ankang', 'shanghai', 'taiyuan', 'datong', 'jincheng',
        'linfen', 'changzhi', 'yuncheng', 'xinzhou', 'shuozhou', 'lvliang', 'jinzhong', 'yangquan', 'chengdu', 'mianyang',
        'suining', 'panzhihua', 'yibin', 'zigong', 'ziyang', 'deyang', 'leshan', 'nanchong', 'meishan', 'bazhong', 'luzhou',
        'neijiang', 'dazhou', 'yaan', 'guangyuan', 'guangan', 'aba', 'ganzi', 'liangshan', 'jinan', 'dezhou', 'qingdao',
        'yantai', 'weihai', 'weifang', 'taian', 'zaozhuang', 'zibo', 'dongying', 'heze', 'binzhou', 'liaocheng', 'linyi',
        'jining', 'rizhao', 'laiwu', 'tianjin', 'wulumuqi', 'kelamayi', 'bazhou', 'yili', 'kashidiqu', 'akesudiqu',
        'hetiandiqu', 'tachengdiqu', 'tulufandiqu', 'hamidiqu', 'aletaidiqu', 'xinjiangkezhou', 'changji', 'shihezi',
        'xinjiangzhixiaxian', 'lasa', 'rikazediqu', 'shannan', 'kunming', 'qujing', 'baoshan', 'xishuangbanna', 'honghe',
        'dali', 'yuxi', 'lincang', 'wenshan', 'zhaotong', 'lijiang', 'dehong', 'nujiang', 'diqing', 'puer', 'chuxiong',
        'hangzhou', 'ningbo', 'wenzhou', 'jiaxing', 'jinhua', 'lishui', 'huzhou', 'quzhou', 'tz', 'shaoxing', 'yiwu',
        'zhoushan'
    ]
    CAR_CODE_LIST = [
        'abt', 'acschnitzer-319', 'alfaromeo', 'always', 'iconiqmotors', 'alpina', 'audi', 'apex',
        'arcfox-289', 'astonmartin', 'aspark', 'honda', 'bmw', 'mercedesbenz', 'buick', 'peugeot', 'bj',
        'barbus', 'bac', 'byton', 'baolong', 'porsche', 'proton', 'borgward', 'bjqc', 'qxev', 'changheauto',
        'daoda-282', 'beiqihuansu', 'shenbao', 'ww', 'beiqixinnengyuan', 'beijingjeep', 'besturn', 'byvinauto',
        'bentley', 'pininfarina', 'bisuqiche-263', 'bydauto', 'xingchi', 'bordrin', 'bollingermotors',
        'bugatti', 'caterham', 'changankuayue-283', 'casyc', 'cajc', 'changanqingxingche-281', 'greatwall',
        'speedauto', 'chenggongqiche', 'cupra', 'czinger', 'volkswagen', 'dorcen', 'dacia', 'dadiauto',
        'daihatsu-355', 'dodge', 'dayu', 'dayun', 'dearcc', 'dongfeng-27', 'dongfengfengdu',
        'dongfengfengguang', 'fs', 'fengxingauto', 'dongfengfukang', 'dongfengruitaite',
        'dongfengxiaokang-205', 'southeastautomobile', 'donkervoort', 'ds', 'toyota', 'ford', 'ferrari',
        'fiat', 'maple', 'fisker-369', 'foday', 'fuqiautomobile', 'fujianxinlongmaqichegufenyouxiangongsi',
        'foton', 'humanhorizons', 'grove', 'gfgstyle', 'gmc-109', 'galue', 'gq', 'gonow', 'gacgroup',
        'guangqihinomotors', 'gacne', 'qorosauto', 'sinogold', 'guojizhijun', 'nevs', 'gyon',
        'hafeiautomobile', 'hafu-196', 'higer', 'haige1', 'hama', 'haimu', 'hummer', 'hanlong', 'hanteng',
        'evergrandeneoenergy', 'chtc', 'hennessey', 'hispanosuiza', 'faw-hongqi', 'redstar', 'htyt', 'huakai',
        'sgautomotive', 'sma', 'horki', 'huasong', 'huataiautomobile', 'shanghaihuizhong-45', 'hycan', 'icona',
        'inkas', 'jac', 'jmc', 'jianglinglvjuche', 'jauger', 'jetta', 'genesis-357', 'jetour', 'geometry',
        'geely', 'jinbei', 'jinchengautomobile', 'kinglongmotor', 'jlkc', 'jeep', 'joylongautomobile', 'traum',
        'juntiansuv', 'iat-314', 'kaersen', 'cadillac', 'karry', 'skywell-342', 'kaiyi', 'karma-330',
        'zhejiangkaersen', 'kawei', 'chrysler', 'koenigsegg', 'ktm', 'lada', 'ladaa', 'lamborghini',
        'lancia-392', 'voyah', 'rolls-royce', 'levdeo', 'lexus', 'renult', 'renaultsamsungmotors', 'levc',
        'lotus-146', 'cf', 'lifanmotors', 'lingbox', 'lynkco', 'suzuki', 'leapmotor', 'linktour', 'everus',
        'lincoln', 'li', 'lordstownmotors', 'lucid', 'landwind', 'landrover', 'rolfhartge', 'lorinser',
        'lotus', 'mahindra', 'maybach', 'mclaren', 'mansory', 'maserati', 'mazda', 'micro', 'mg-79', 'mini',
        'morgancars', 'nanqixinyatu1', 'hozon', 'luxgen', 'opel', 'acura', 'ora', 'ol', 'pagani', 'pgo-379',
        'polestar', 'puritalia', 'chautotechnology', 'qiaozhibadun-339', 'venucia', 'jdmc', 'isuzu', 'qyev',
        'chery', 'kia', 'kangdi', 'nissan', 'rimac', 'rivian', 'roewe', 'ruf', 'ruichixinnengyuan', 'riich',
        'saab', 'saleen', 'mitsubishi', 'sfmotors', 'maxus', 'shangqisaibao', 'shangqiyuejin',
        'shanqitongjia1', 'sj', 'sceo', 'ssangyong', 'subaru', 'sol', 'skoda', 'ciimo', 'smart', 'srm', 'ssc',
        'suda-399', 'sony', 'siwei', 'tking', 'tata', 'tesla', 'skywell-394', 'tianqimeiya', 'denza',
        'troller', 'vantas', 'vegainnovations', 'vinfast', 'uaz', 'wey', 'eurise', 'vgv', 'weilaiqiche',
        'rely', 'weltmeister', 'wiesmann', 'volvo', 'vauxhall', 'sgmw', 'isuzu-132', 'hyundai', 'xpeng',
        'baojun-359', 'exeed', 'xinkaiauto', 'sitech', 'seat', 'chevrolet', 'citroen', 'ym', 'infiniti',
        'enranger', 'yinlong', 'faw', 'yiqijiefang-409', 'iveco', 'jonwayautomobile', 'yuanchengqiche', 'yulu',
        'yudo', 'yunqueqiche', 'yusheng-258', 'yutong', 'zenvo-347', 'zhidou', 'zhinuo', 'sinotruk',
        'brillianceauto', 'zotyeauto', 'zxauto', 'polarsunautomobile'
    ]

### (三)spiders组件 ###

![在这里插入图片描述][20200913085646329.png_pic_center]

import re
    
    import scrapy,socket
    from .city import CITY_CODE,CAR_CODE_LIST
    from ..my_settings import CUSTOM_SETTINGS,add_page
    
    
    class TaocheScrapySpider(scrapy.Spider):
        name = 'taoche_scrapy'
        myaddr=socket.gethostbyname(socket.gethostname())
        # allowed_domains = ['www']
        custom_settings = CUSTOM_SETTINGS
        start_urls = []
        for city in CITY_CODE:
            for car in CAR_CODE_LIST:
                start_urls.append(f'https://{city}.taoche.com/{car}/?page=1')
        def parse(self, response):
            li_list=response.xpath('//ul[@class="gongge_ul"]/li')
            if li_list:
                for li in li_list:
                    try:
                        car_title=li.xpath('.//div[@class="gongge_main"]/a/@title').extract_first()
                        car_url=li.xpath('.//div[@class="gongge_main"]/a/@href').extract_first()
                        car_now_price=li.xpath('.//div[@class="price"]/i[1]/text()').extract_first()
                        car_old_price=li.xpath('.//div[@class="price"]/i[2]/text()').extract_first()
                        info=li.xpath('.//div[@class="gongge_main"]/p/i/text()').extract()
                        car_years=info[0]
                        car_licheng=info[1]
                        car_product_area=info[2].strip()
                        item={ }
                        item['car_title']=car_title
                        item['car_now_price']=car_now_price
                        item['car_old_price']=car_old_price
                        item['car_years']=car_years
                        item['car_licheng']=car_licheng
                        item['car_product_area']=car_product_area
                        item['ip']=self.myaddr
                        item['car_url']=car_url
                        yield item
    
                    except:
                        pass
    
                #请求下一页
                now_url=response.url
                next_url=re.sub(r'\?page=(\d+)',add_page,now_url)
                yield scrapy.Request(next_url,callback=self.parse,encoding='utf-8')

### (四)items组件 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ExMzA5NTI1ODAy_size_16_color_FFFFFF_t_70_pic_center 1]

# Define here the models for your scraped items
    #
    # See documentation in:
    # https://docs.scrapy.org/en/latest/topics/items.html
    
    import scrapy
    
    
    class TaocheItem(scrapy.Item):
        # define the fields for your item here like:
        car_title =  scrapy.Field()
        car_now_price =  scrapy.Field()
        car_old_price =  scrapy.Field()
        car_years =  scrapy.Field()
        car_licheng =  scrapy.Field()
        car_product_area =  scrapy.Field()
        myaddr =  scrapy.Field()
        car_url =  scrapy.Field()
        car_id =  scrapy.Field()

### (五)管道组件 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ExMzA5NTI1ODAy_size_16_color_FFFFFF_t_70_pic_center 2]

# Define your item pipelines here
    #
    # Don't forget to add your pipeline to the ITEM_PIPELINES setting
    # See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html
    
    
    # useful for handling different item types with a single interface
    import pymongo
    from itemadapter import ItemAdapter
    
    from .my_settings import update_to_mongo
    
    
    class TaochePipeline:
        def __init__(self, mongo_uri, mongo_db):
            self.mongo_uri = mongo_uri
            self.mongo_db = mongo_db
    
        @classmethod
        def from_crawler(cls, crawler):
            return cls(
                mongo_uri=crawler.settings.get('MONGO_URI'),
                mongo_db=crawler.settings.get('MONGO_DATABASE', 'items')
            )
    
        def open_spider(self, spider):
            self.client = pymongo.MongoClient(self.mongo_uri)
            self.db = self.client[self.mongo_db]
    
        def close_spider(self, spider):
            self.client.close()
    
        def process_item(self, item, spider):
            update_to_mongo(self.db,'car','car_id','car_url',item)
            return item

### (六)调试 ###

scrapy crawl taoche_scrapy

### (七)效果图 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ExMzA5NTI1ODAy_size_16_color_FFFFFF_t_70_pic_center 3]

# 淘车网(scrapy-redis) #

## 步骤 ##

**这里只需要修改几个地方即可**

### settings ###

![在这里插入图片描述][20200913090317435.png_pic_center]

import hashlib
    
    CUSTOM_SETTINGS = { 
        # robotes协议
        'ROBOTSTXT_OBEY': False,
        # 请求头
        'DEFAULT_REQUEST_HEADERS': { 
            'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
            'Accept-Language': 'en',
            'user-agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36 Maxthon/5.2.6.1000',
        },
        # 下载中间件
        # 'DOWNLOADER_MIDDLEWARES': { 
        # 'hupu.middlewares.HupuDownloaderMiddleware': 543,
        # },
        #pipelines
        'ITEM_PIPELINES' : { 
            'taoche.pipelines.TaochePipeline': 300,
        },
        #数据库的url
        'MONGO_URI':'localhost',
        #数据的名字
        'MONGO_DATABASE':'taoche',
        #新加
        #配置scrapy-redis调度器
        'SCHEDULER':'scrapy_redis.scheduler.Scheduler',
        #配置url去重
        'DUPEFILTER_CLASS':'scrapy_redis.dupefilter.RFPDupeFilter',
        #配置优先级队列
        'SCHEDULER_QUEUE_CLASS':'scrapy_redis.queue.PriorityQueue',
        #Redis端口
        'REDIS_PORT':6379,
        'REDIS_HOST':'localhost',
    
    }
    
    
    def get_md5(value):
        return hashlib.md5(bytes(value, encoding='utf-8')).hexdigest()
    def update_to_mongo(db,collectionName,id,url,item):
        if url:
            item[id] = get_md5(item[url])
        db[collectionName].update({ id: item[id]}, { '$set': dict(item)}, True)
        print("正在存储..........")
    def add_page(m):
        return '?page='+str(int(m.group(1))+1)

### 初始化 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ExMzA5NTI1ODAy_size_16_color_FFFFFF_t_70_pic_center 4]

import redis
    from .city import *
    redis_=redis.Redis()
    #初始化
    for city in CITY_CODE:
            for car in CAR_CODE_LIST:
                url=f'https://{city}.taoche.com/{car}/?page=1'
                redis_.lpush('taoche:start_urls',url)

### spiders组件 ###

![在这里插入图片描述][20200913090428822.png_pic_center]

import re
    
    import scrapy,socket
    from scrapy_redis import spiders
    from .city import CITY_CODE,CAR_CODE_LIST
    from ..my_settings import CUSTOM_SETTINGS,add_page
    
    
    class TaocheScrapySpider(spiders.RedisSpider):
        name = 'taoche_scrapy'
        myaddr=socket.gethostbyname(socket.gethostname())
        custom_settings = CUSTOM_SETTINGS
        redis_key = 'taoche:start_urls'
        def parse(self, response):
            li_list=response.xpath('//ul[@class="gongge_ul"]/li')
            if li_list:
                for li in li_list:
                    try:
                        car_title=li.xpath('.//div[@class="gongge_main"]/a/@title').extract_first()
                        car_url=li.xpath('.//div[@class="gongge_main"]/a/@href').extract_first()
                        car_now_price=li.xpath('.//div[@class="price"]/i[1]/text()').extract_first()
                        car_old_price=li.xpath('.//div[@class="price"]/i[2]/text()').extract_first()
                        info=li.xpath('.//div[@class="gongge_main"]/p/i/text()').extract()
                        car_years=info[0]
                        car_licheng=info[1]
                        car_product_area=info[2].strip()
                        item={ }
                        item['car_title']=car_title
                        item['car_now_price']=car_now_price
                        item['car_old_price']=car_old_price
                        item['car_years']=car_years
                        item['car_licheng']=car_licheng
                        item['car_product_area']=car_product_area
                        item['ip']=self.myaddr
                        item['car_url']=car_url
                        yield item
    
                    except:
                        pass
    
                #请求下一页
                now_url=response.url
                next_url=re.sub(r'\?page=(\d+)',add_page,now_url)
                yield scrapy.Request(next_url,callback=self.parse,encoding='utf-8')

![在这里插入图片描述][20200913090556635.png_pic_center]  
![在这里插入图片描述][20200913090603681.png_pic_center]

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[2020091308575196.png_pic_center]: /images/20221123/3c72bc59e7b749a78123fc08029afda8.png
[20200913085519371.png_pic_center]: /images/20221123/eb7515407ce94d17a693afcbb337193e.png
[20200913085646329.png_pic_center]: /images/20221123/9d4dc00746f045da919cfe607f9da6a2.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ExMzA5NTI1ODAy_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/f64f9dc6adf14c7fa6aaebffe204112b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ExMzA5NTI1ODAy_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221123/b47b1de433c441299ccfb982f4fa95fe.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ExMzA5NTI1ODAy_size_16_color_FFFFFF_t_70_pic_center 3]: /images/20221123/a46a969afb4a455b96657f417c4093a4.png
[20200913090317435.png_pic_center]: /images/20221123/365dd5945bb941d997a7ba5a0d8ef230.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ExMzA5NTI1ODAy_size_16_color_FFFFFF_t_70_pic_center 4]: /images/20221123/baf210c1bd9a44bea58334da4aaf8cf1.png
[20200913090428822.png_pic_center]: /images/20221123/0cf2f45662d346c5be4967aef9c37df5.png
[20200913090556635.png_pic_center]: /images/20221123/2c39a0fbc9124c56b62b7f1d431b588e.png
[20200913090603681.png_pic_center]: /images/20221123/e1d21a17c21b48c8a1d83a4fca09fb36.png