72 lines
2.4 KiB
Python
72 lines
2.4 KiB
Python
import csv
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import time
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from cmd import Cmd
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from DoubanSpider.db import Douban, Recording
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from DoubanSpider.Spider import DoubanBook
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class SpiderMain(Cmd):
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intro = '豆瓣图书爬虫V2.0 ---------- 输入help获取帮助。'
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def __init__(self):
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super().__init__()
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pass
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def do_help(self, arg):
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print('[Help] start - 开始爬取任务，默认从上次结束的地方开始')
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print('[Help] tag TAG - 添加/爬取 标签下的书籍，TAG是你需要添加的标签')
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print('[Help] tag all - 爬取所有标签下的书籍')
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print('[Help] quit - 退出程序')
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def do_start(self, arg):
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for row in url_pool():
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douban.get_data(row)
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print('爬取结束！')
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def do_tag(self, arg):
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if arg == "all":
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print("[WAR]请注意，在没有代理池的情况下，此操作通常无法完成！")
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douban.get_tags()
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print('[Spider]标签下所有书籍信息爬取完成！请输入start开始抓取数据！')
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else:
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print(f"[Spider]开始获取{arg}标签下的所有书籍，这需要一定时间！")
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douban.get_url(arg)
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print('[Spider]标签下所有书籍信息爬取完成！请输入start开始抓取数据！')
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def do_quit(self, arg):
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exit()
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def main(self):
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self.cmdloop()
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def url_pool():
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if not n:
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print('[Spider]你需要先获取tag数据!')
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else:
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for row in douban.session.query(Douban.url, Douban.tag, Douban.id).all():
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ago = douban.session.query(Recording.data).first()
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if row[2] > ago[0]:
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yield row
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if __name__ == '__main__':
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with open("results.csv", "a", encoding='utf-8') as f:
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writer = csv.writer(f)
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writer.writerow(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime()))
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writer.writerow(["书名", "作者", "上市时间", "价格", "评分", "书籍分类", "内容简介"])
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spider = SpiderMain()
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douban = DoubanBook()
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rec = douban.session.query(Recording.id).all()
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if not rec:
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douban.session.add(Recording(id=1, data=0))
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douban.session.commit()
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n = douban.session.query(Douban.url, Douban.tag).all()
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if not n:
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print('未检测到任何数据，请使用 tag 关键字获取标签数据，输入help获取帮助。')
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else:
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print('检测到现有TAG数据，输入start直接开始抓取...')
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spider.main()
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