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https://issues.apache.org/jira/browse/VALIDATOR-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12464991
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Adam Gordon commented on VALIDATOR-220:
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Oh, excellent. Thanks for the heads up.
> EmailValidator fails with ArrayIndexOutOfBoundsException on domain names
> longer than 10 segments
> ------------------------------------------------------------------------------------------------
>
> Key: VALIDATOR-220
> URL: https://issues.apache.org/jira/browse/VALIDATOR-220
> Project: Commons Validator
> Issue Type: Bug
> Components: Framework
> Affects Versions: 1.3.0 Release, 1.3.1 Release
> Environment: $ uname -a
> Linux frisky 2.6.17-10-generic #2 SMP Tue Dec 5 22:28:26 UTC 2006 i686
> GNU/Linux
> Reporter: Adam Gordon
> Assigned To: Niall Pemberton
> Fix For: 1.4
>
>
> The EmailValidator class, specifically, the "protected boolean
> isValidSymbolicDomain(String domain)" method makes an assumption on the PERL
> RegEX rules, specifically, that no more than 10 domains/subdomains may be
> specified in an email address. I.e. an email address of "[EMAIL PROTECTED]"
> is valid according to the EmailValidator whereas an email address of "[EMAIL
> PROTECTED]" causes isValidSymbolicDomain(String) to throw an
> ArrayIndexOutOfBoundsException because the "domainSegment" local variable is
> hard-coded to have a length of 10.
> Whether or not this is due to a limitation in PERL w.r.t. the maximum number
> of allowed groupings, I do not know, but the RFC for email addresses does not
> appear to specify a maximum number. Additionally, although I couldn't find
> it in the RFC, Wikipedia says that the maximum number of characters for the
> domain name is 255 - though I am very hesitant to cite/use Wikipedia as an
> official source...
> Granted, I've never seen a domain name w/ more than 5 subdomain names, let
> alone 10, but it seems like it should be supported regardless.
> I'd submit a patch, but I wanted to discuss possible courses of action and
> determine the "right" (or at least acceptable) one. Possible solutions are:
> 1. check if the counter i in the for loop is > 10 and perform some action
> that stops the iterative process.
> 2. if the max number of groupings in PERL RegEX is 10, maybe we shouldn't
> use RegEX to determine the groupings.
> 3. if, per the RFC, the max number of domain name groupings is 10, then the
> code should check for this.
> Please let me know if you 1) have an alternative solution and 2) want me to
> code a/the fix.
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