问题
How can I disallow URLs like 1.html, 2.html, ..., [0-9]+.html (in terms of regexp) with robots.txt?
回答1:
The original robots.txt specification doesn't support regex/wildcards. However, you could block URLs like these:
- example.com/1.html
- example.com/2367123.html
- example.com/3
- example.com/4/foo
- example.com/5/1
- example.com/6/
- example.com/7.txt
- example.com/883
- example.com/9to5
- …
with:
User-agent: *
Disallow: /0
Disallow: /1
Disallow: /2
Disallow: /3
Disallow: /4
Disallow: /5
Disallow: /6
Disallow: /7
Disallow: /8
Disallow: /9
If you want to block only URLs starting with a single numeral followed by .html, just append .html, like:
User-agent: *
Disallow: /0.html
Disallow: /1.html
…
However, this wouldn't block, for example, example.com/12.html
来源：https://stackoverflow.com/questions/13863586/common-rule-in-robots-txt