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https://issues.apache.org/jira/browse/VALIDATOR-248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12540680
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Sergey Nebolsin commented on VALIDATOR-248:
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Ok, I do agree. ALLOW_MACHINE_NAMES with a list of allowed machine names is a
good start anyway, and it'll cover most possible cases. Can I also suggest what
machine names in this list to be treated as regexps, so I will be able to
specify things like "all machines from my local domain" or "all machines with
names like xyz-*". I think in this case it will be flexible enough to cover
almost all cases without further complication of UrlValidator.
If such solution is desirable I'll create a separate issue and link this ticket
to it, since ALLOW_MACHINE_NAMES feature will perfectly cover 'localhost' case,
and there will be no need for ALLOW_LOCALHOST option.
> Add an option to allow 'localhost' as a valid hostname part in the URL
> ----------------------------------------------------------------------
>
> Key: VALIDATOR-248
> URL: https://issues.apache.org/jira/browse/VALIDATOR-248
> Project: Commons Validator
> Issue Type: Improvement
> Components: Routines
> Affects Versions: 1.3.1 Release
> Reporter: Sergey Nebolsin
> Assignee: Ben Speakmon
> Fix For: 1.4
>
> Attachments: commons-validator-allow-localhost-r592416.patch,
> commons-validator-allow-non-iana-tlds-r592416.patch
>
>
> Working on Grails we've discovered
> (http://jira.codehaus.org/browse/GRAILS-1692) that commons-validator's
> UrlValidator rejects URLs like "http://localhost:8080/tau_gwi_00/clif/cb/19";.
> I looked at commons-validator sources and found that any URL which contains
> 'localhost' as it's hostname part will be rejected.
> RFC-2396 (http://www.ietf.org/rfc/rfc2396.txt) accepts 'localhost' as a valid
> hostname (appendix G.3 paragraph 2 says that explicitly).
> So, it would be good to have additional option (UrlValidator.ALLOW_LOCALHOST)
> which will control UrlValidator behavior on localhost URLs.
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