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这次的抓取我用的是requests和Xpath,因为没有必要使用大型工具
import requests from lxml import etree
思路:
1.目的是下载爬虫教程
2.分析网页以及规则,使用Xpath简单获取下载url
3.循环下载
代码如下:
class github(): def __init__(self): self.allowed_domains = 'https://github.com/Python3WebSpider' self.headers = { 'User-Agent':'*****请换成你们自己的 ' } def spider_pipline(self): response1 = requests.get(self.allowed_domains,headers = self.headers,timeout = 5) selector = etree.HTML(response1.text) main_hrefs = selector.xpath('//div[@id="org-repositories"]//ul/li/div[@class="d-inline-block mb-1"]//a/@href') for start_href in main_hrefs: href = 'https://github.com'+ start_href response2 = requests.get(href, headers=self.headers, timeout=5) selector2 = etree.HTML(response2.text) href = selector2.xpath('//main[@id="js-repo-pjax-container"]//div[@class="get-repo-modal-options"]/div[@class="mt-2"]/a[2]/@href') for item in href: item_new = 'https://github.com'+item # yield item_new # print(item_new) r = requests.get(item_new) item = item[18:].replace('/','-') # print(item) with open(item, "wb") as git_zip: git_zip.write(r.content) print('done-') if __name__ == '__main__': git = github() git.spider_pipline() print('down——OK')
最后的最后,建议大家给GitHub博主送个星,那个博主也是我崇拜的偶像呢! 他的书很不错!建议买书进行学习、有利于知识体系的结构化构建
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