Add an option to allow 'localhost' as a valid hostname part in the URL
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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
Fix For: 1.4
Working on Grails we've discovered
([Grails-1692|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 (also see appendix G.3 paragraph 2, which says that explicitly).
So, it would be good to add additional option (UrlValidator.ALLOW_LOCALHOST)
which will control UrlValidator behavior on localhost URLs.
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