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https://issues.apache.org/jira/browse/HTTPCLIENT-911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12831662#action_12831662
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Ortwin Glück commented on HTTPCLIENT-911:
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You are referring to underscores in DNS names. Yes, they are illegal. And yes,
MS allows them for Windows host names, which doesn't make them any more legal
in DNS.
Anyway, the NPE is ugly and we should probably issue a better exception.
> Support underscore in domain name, or provide better exception
> --------------------------------------------------------------
>
> Key: HTTPCLIENT-911
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-911
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient
> Affects Versions: 4.0.1
> Reporter: Ziv Horesh
>
> When calling on HttpClient.execute with a url that contain underscore ('_'),
> you get NullPointerException.
> Tracing it down show that java.net.Uri complains that it is illegal name.
> Which is true according to the RFC.
> But it seems that most browser allow it, and some companies support it.
> I think HttpClient should either support underscores, or atleast provide a
> better exception.
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