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spider

使用 Python 编写的一个网站爬虫程序,来自知道创宇信息技术有限公司的面试题

使用 python3 执行,使用方法如下:

python spider.py -u url -d deep -f logfile -l loglevel(1-5)  --testself -thread number --dbfile=filepath  --key="HTML5"

参数说明:

  • -u 指定爬虫开始地址

  • -d 指定爬虫深度

  • --thread 指定线程池大小,多线程爬取页面,可选参数,默认10

  • --dbfile 存放结果数据到指定的数据库(sqlite)文件中

  • --key 页面内的关键词,获取满足该关键词的网页,可选参数,默认为所有页面

  • -l 日志记录文件记录详细程度,数字越大记录越详细,可选参数,默认spider.log

  • --testself 程序自测,可选参数

功能描述:

  • 指定网站爬取指定深度的页面,将包含指定关键词的页面内容存放到sqlite3数据库文件中

  • 程序每隔10秒在屏幕上打印进度信息

  • 支持线程池机制,并发爬取网页

  • 代码需要详尽的注释,自己需要深刻理解该程序所涉及到的各类知识点

  • 需要自己实现线程池

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