基于scrapy中---全站爬取数据----CrawlSpider的使用

 1 import scrapy
 2 from scrapy.linkextractors import LinkExtractor
 3 from scrapy.spiders import CrawlSpider, Rule
 4 
 5 
 6 class QiubaiSpider(CrawlSpider):
 7     name = ‘qiubai‘
 8     # allowed_domains = [‘www.xxx.com‘]
 9     start_urls = [‘https://www.qiushibaike.com/pic/‘]
10     #第一页之后的所有url
11     link=LinkExtractor(allow=r‘/pic/page/\d+\?‘)
12     #第一页的url
13     link1=LinkExtractor(allow=r‘/pic/$‘)
14     rules = (
15         Rule(link, callback=‘parse_item‘, follow=True),
16         Rule(link1, callback=‘parse_item‘, follow=True),
17     )
18 
19     def parse_item(self, response):
20         print(response.xpath(‘//*[@id="qiushi_tag_121352783"]/a/div/span/text()‘).extract_first())