2020年3月9日robots.txt文件采用了非常简单的, 面向行的语法。robots.txt文件中有三种类型的 行: 空行、注释行和规则行。规则行看起来就像HTIP首部(<Field>:<value>) 一样, 用于模式匹配。比如: # this robots.txt file allows Slurp & Webcrawler to crawl # the public parts of our site, but no other robots .....
Robots.txt is a text file webmasters create to instruct robots (typically search engine robots) how to crawl & index pages on their website. The robots.txt file is part of the robots exclusion protocol (REP), a group of web standards that regulate how ro