网络爬虫(又被称为网页蜘蛛，网络机器人，在FOAF社区中间，更经常的称为网页追逐者)，是一种按照一定的规则，自动的抓取万维网信息的程序或者脚本。-Web crawler (also known as web spider, web robot, FOAF community in the middle, more often referred to as the page chaser), is a follow certain rules to automatically crawl the