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https://issues.apache.org/jira/browse/NUTCH-2468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16273281#comment-16273281
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Michael Coffey commented on NUTCH-2468:
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I believe there are at least 2 ways to address this issue.
The simple way is to add urlfilter-validator to the plugin.includes property in
nutch-default.xml. That would apply to all users who don't override
plugin.includes and would not affect those that do.
Another way would be to add an exclusion pattern to the default
regex-urlfilter,txt. That would apply to all users who don't use a custom
regex-urlfilter,txt and would not affect those that do.
RFC 3986 (the URI spec) defines a regex for URIs at
tools.ietf.org/html/rfc3986#appendix-B
> should filter out invalid URLs by default
> -----------------------------------------
>
> Key: NUTCH-2468
> URL: https://issues.apache.org/jira/browse/NUTCH-2468
> Project: Nutch
> Issue Type: Bug
> Components: bin
> Affects Versions: 1.12
> Reporter: Michael Coffey
>
> Some Nutch components, by default, should reject invalid URLs. This was
> recently discussed in the users mailing list and has affected my work for a
> while. Although there may be some special-purpose needs to collect invalid
> URLs, they are not generally useful for crawling.
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