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https://issues.apache.org/jira/browse/NUTCH-731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12722242#action_12722242
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Ken Krugler commented on NUTCH-731:
-----------------------------------
This is definitely an issue - I've been pinging various domains while testing
robots.txt handling in bixo, and many of them will do a redirect if you use
http://<domain>/robots.txt, to http://www.<domain>/robots.txt.
> Redirection of robots.txt in RobotRulesParser
> ---------------------------------------------
>
> Key: NUTCH-731
> URL: https://issues.apache.org/jira/browse/NUTCH-731
> Project: Nutch
> Issue Type: Improvement
> Components: fetcher
> Affects Versions: 1.0.0
> Reporter: Julien Nioche
> Attachments: NUTCH-731.patch
>
>
> The patch attached allows to follow one level of redirection for robots.txt
> files. A similar issue was mentioned in NUTCH-124 and has been marked as
> fixed a long time ago but the problem remained, at least when using Fetcher2
> . Mathijs Homminga pointed to the problem in a mail to the nutch-dev list in
> March.
> I have been using this patch for a while now on a large cluster and noticed
> that the ratio of robots_denied per fetchlist went up, meaning that at least
> we are now getting restrictions we would not have had before (and getting
> less complaints from webmasters at the same time)
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