1、redis的使用，自己可以多学习下，个人也是在学习
https://www.cnblogs.com/ywjfx/p/10262662.html
官网可以自己搜索下。
2、下载安装scrapy-redis
pip install scrapy-redis
3、下载好了，就可以使用了，使用也很简单，只需要在settings.py配置文件添加一下四个
#######redis配置####### DUPEFILTER_CLASS = "scrapy_redis.dupefilter.RFPDupeFilter" SCHEDULER = "scrapy_redis.scheduler.Scheduler" SCHEDULER_PERSIST = True REDIS_URL = "redis://127.0.0.1:6379" #######redis配置#######
如：settings.py
# -*- coding: utf-8 -*- # Scrapy settings for circ project # # For simplicity, this file contains only settings considered important or # commonly used. You can find more settings consulting the documentation: # # http://doc.scrapy.org/en/latest/topics/settings.html # http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html # http://scrapy.readthedocs.org/en/latest/topics/spider-middleware.html BOT_NAME = 'circ' SPIDER_MODULES = ['circ.spiders'] NEWSPIDER_MODULE = 'circ.spiders' LOG_LEVEL = "WARNING" # Crawl responsibly by identifying yourself (and your website) on the user-agent USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36' # Obey robots.txt rules ROBOTSTXT_OBEY = True #######redis配置####### DUPEFILTER_CLASS = "scrapy_redis.dupefilter.RFPDupeFilter" SCHEDULER = "scrapy_redis.scheduler.Scheduler" SCHEDULER_PERSIST = True REDIS_URL = "redis://127.0.0.1:6379" #######redis配置####### # Configure maximum concurrent requests performed by Scrapy (default: 16) #CONCURRENT_REQUESTS = 32 # Configure a delay for requests for the same website (default: 0) # See http://scrapy.readthedocs.org/en/latest/topics/settings.html#download-delay # See also autothrottle settings and docs #DOWNLOAD_DELAY = 3 # The download delay setting will honor only one of: #CONCURRENT_REQUESTS_PER_DOMAIN = 16 #CONCURRENT_REQUESTS_PER_IP = 16 # Disable cookies (enabled by default) #COOKIES_ENABLED = False # Disable Telnet Console (enabled by default) #TELNETCONSOLE_ENABLED = False # Override the default request headers: #DEFAULT_REQUEST_HEADERS = { # 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', # 'Accept-Language': 'en', #} # Enable or disable spider middlewares # See http://scrapy.readthedocs.org/en/latest/topics/spider-middleware.html #SPIDER_MIDDLEWARES = { # 'circ.middlewares.CircSpiderMiddleware': 543, #} # Enable or disable downloader middlewares # See http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html #DOWNLOADER_MIDDLEWARES = { # 'circ.middlewares.RandomUserAgentMiddleware': 543, # 'circ.middlewares.CheckUserAgent': 544, #} # Enable or disable extensions # See http://scrapy.readthedocs.org/en/latest/topics/extensions.html #EXTENSIONS = { # 'scrapy.extensions.telnet.TelnetConsole': None, #} # Configure item pipelines # See http://scrapy.readthedocs.org/en/latest/topics/item-pipeline.html #ITEM_PIPELINES = { # 'circ.pipelines.CircPipeline': 300, #} # Enable and configure the AutoThrottle extension (disabled by default) # See http://doc.scrapy.org/en/latest/topics/autothrottle.html #AUTOTHROTTLE_ENABLED = True # The initial download delay #AUTOTHROTTLE_START_DELAY = 5 # The maximum download delay to be set in case of high latencies #AUTOTHROTTLE_MAX_DELAY = 60 # The average number of requests Scrapy should be sending in parallel to # each remote server #AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0 # Enable showing throttling stats for every response received: #AUTOTHROTTLE_DEBUG = False # Enable and configure HTTP caching (disabled by default) # See http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings #HTTPCACHE_ENABLED = True #HTTPCACHE_EXPIRATION_SECS = 0 #HTTPCACHE_DIR = 'httpcache' #HTTPCACHE_IGNORE_HTTP_CODES = [] #HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage' USER_AGENTS_LIST = [ "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)", "Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 1.0.3705; .NET CLR 1.1.4322)", "Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.0.04506.30)", "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN) AppleWebKit/523.15 (KHTML, like Gecko, Safari/419.3) Arora/0.3 (Change: 287 c9dfb30)", "Mozilla/5.0 (X11; U; Linux; en-US) AppleWebKit/527+ (KHTML, like Gecko, Safari/419.3) Arora/0.6", "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2pre) Gecko/20070215 K-Ninja/2.1.1", "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9) Gecko/20080705 Firefox/3.0 Kapiko/3.0", "Mozilla/5.0 (X11; Linux i686; U;) Gecko/20070322 Kazehakase/0.4.5" ]
4、其他的可以不用管了，直接开始scrapy爬虫就可以了
# -*- coding: utf-8 -*- import scrapy from scrapy.linkextractors import LinkExtractor from scrapy.spiders import CrawlSpider, Rule import re class CfSpider(CrawlSpider): name = 'cf' allowed_domains = ['bxjg.circ.gov.cn'] start_urls = ['http://bxjg.circ.gov.cn/web/site0/tab5240/module14430/page1.htm'] #定义提取url地址规则 rules = ( #LinkExtractor 连接提取器，提取url地址 #callback 提取出来的url地址的response会交给callback处理 #follow 当前url地址的响应是够重新进过rules来提取url地址， Rule(LinkExtractor(allow=r'/web/site0/tab5240/infod+.htm'), callback='parse_item'), Rule(LinkExtractor(allow=r'/web/site0/tab5240/module14430/paged+.htm'),follow=True), ) #parse函数有特殊功能，不能定义 def parse_item(self, response): item = {} item["title"] = re.findall("<!--TitleStart-->(.*?)<!--TitleEnd-->",response.body.decode())[0] item["publish_date"] = re.findall("发布时间：(20d{2}-d{2}-d{2})",response.body.decode())[0] #print(item) yield item # yield scrapy.Request( # url, # callback=self.parse_detail, # meta = {"item":item} # ) # # def parse_detail(self,response): # item = response.meta["item"] # item["price"] = "///" # yield item
5、登陆redis,通过命令查看
keys * type "cf:dupefilter" SMEMBERS "cf:dupefilter"
出现数据，说明成功了
