[jira] [Commented] (VALIDATOR-318) isValid return false for valid URL

["Sebb (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/VALIDATOR-318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13622058#comment-13622058 ] 

Sebb commented on VALIDATOR-318:
--------------------------------

RFC3986 2.3 relates to the overall URL, not specific components.

The host part of the authority has additional constraints, see

http://tools.ietf.org/html/rfc1034#section-3.5
and
http://tools.ietf.org/html/rfc1035#section-2.3.1

These only allows alphanumeric and hyphen; underscore is not allowed.

These RFCs appear to have been extended, but I've not yet found where the host name allowable character set is defined.



                
> isValid return false for valid URL
> ----------------------------------
>
>                 Key: VALIDATOR-318
>                 URL: https://issues.apache.org/jira/browse/VALIDATOR-318
>             Project: Commons Validator
>          Issue Type: Bug
>    Affects Versions: 1.3.1 Release, 1.4.0 Release
>            Reporter: Rafał Figas
>
> isValid returns false for following URL:
> http://www.nasza_sp77.republika.pl/
> which seems to be perfectly legal according to RFC:
> http://tools.ietf.org/html/rfc3986#section-2.3
> And a discussions here:
> http://stackoverflow.com/questions/2180465/can-someone-have-a-subdomain-with-an-underscore-in-it
> http://stackoverflow.com/questions/10959757/the-use-of-the-underscore-in-host-names
> Test code:
> {code}
> String schemes[] = { "http", "https" };
> UrlValidator validator = new UrlValidator(schemes, UrlValidator.NO_FRAGMENTS);
> return validator.isValid("http://www.nasza_sp77.republika.pl/");
> {code}
> This is somewhat similar to VALIDATOR-204, but that was for path part of URL and this one is for underscore in hostname.

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