[jira] [Commented] (VALIDATOR-483) DomainValidator conversion to ASCII uses an obsoleted standard

["Julien Bernard (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/VALIDATOR-483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17607929#comment-17607929 ] 

Julien Bernard commented on VALIDATOR-483:
------------------------------------------

Any feedback on this?

> DomainValidator conversion to ASCII uses an obsoleted standard
> --------------------------------------------------------------
>
>                 Key: VALIDATOR-483
>                 URL: https://issues.apache.org/jira/browse/VALIDATOR-483
>             Project: Commons Validator
>          Issue Type: Bug
>          Components: Routines
>         Environment: Java openjdk 11 on Linux
>            Reporter: Julien Bernard
>            Priority: Major
>
> DomainValidator uses java.net.IDN for its conversion to ASCII which is based on RFC3490 (IDNA 2003) that is obsoleted by RFC 5891 (IDNA 2008).
> An external library such as ICU4J may be used for an IDNA 2008 compliant conversion:
> {code:java}
> int flags = IDNA.CHECK_BIDI
>        | IDNA.CHECK_CONTEXTJ
>        | IDNA.CHECK_CONTEXTO
>        | IDNA.NONTRANSITIONAL_TO_ASCII
>        | IDNA.USE_STD3_RULES;
> IDNA idna = IDNA.getUTS46Instance(flags);
> IDNA.Info info = new IDNA.Info();
> StringBuilder domainAscii = new StringBuilder();
> idna.nameToASCII(domain, domainAscii, info);
> // check error with info.hasErrors() {code}
>  



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