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Date: Wed, 14 Nov 2012 17:18:12 +0000 (UTC)
From: "Daryn Sharp (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <1206443083.114518.1352913492665.JavaMail.jiratomcat@arcas>
Subject: [jira] [Commented] (HDFS-4171) WebHDFS and HttpFs should accept
 only valid Unix user names
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    [ https://issues.apache.org/jira/browse/HDFS-4171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13497237#comment-13497237 ] 

Daryn Sharp commented on HDFS-4171:
-----------------------------------

I think it may be as simple as making the regexp case-insensitive with (?i).  I'll quickly test otherwise we should consider reverting the patch.
                
> WebHDFS and HttpFs should accept only valid Unix user names
> -----------------------------------------------------------
>
>                 Key: HDFS-4171
>                 URL: https://issues.apache.org/jira/browse/HDFS-4171
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.2-alpha
>            Reporter: Harsh J
>            Assignee: Alejandro Abdelnur
>             Fix For: 2.0.3-alpha
>
>         Attachments: HDFS-4171.patch
>
>
> HttpFs tries to use UserProfile.USER_PATTERN to match all usernames before a doAs impersonation function. This regex is too strict for most usernames, as it disallows any special character at all. We should relax it more or ditch needing to match things there.
> WebHDFS currently has no such limitations.

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