robots.txt parser java

Question

I want to know how to parse the robots.txt in java.

Is there already any code?

Answer 1

Heritrix is an open-source web crawler written in Java. Looking through their javadoc, I see that they have a utility class Robotstxt for parsing the robots.txt file.

Answer 2

There's also jrobotx library hosted at SourceForge.

(Full disclosure: I spun off the code that forms that library.)

Answer 3

There is also a new release of crawler-commons:

https://github.com/crawler-commons/crawler-commons

The library aims to implement functionality common to any web crawler and this includes a very handy robots.txt parser