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From "sravankorumilli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2025) Go Back to File View link is not working in tail.jsp
Date Thu, 02 Jun 2011 11:44:47 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042709#comment-13042709
] 

sravankorumilli commented on HDFS-2025:
---------------------------------------

In DatanodeJspHelper.generateFileChunksForTail

{code:title=DatanodeJspHelper.java|borderStyle=solid}
static void generateFileChunksForTail(JspWriter out, HttpServletRequest req,
Configuration conf) throws IOException,InterruptedException {

final String referrer = JspHelper.validateURL(req.getParameter("referrer"));
//this will encode the referrer url in UTF-8
//some more code 
//the encoded url is itself being used in hyperlink
out.print("<a href=\"" + referrer + "\">Go Back to File View</a><hr>");
}
{code}

Here JspHelper.validateURL(req.getParameter("referrer")) will encode the referrer in UTF-8
and the same will be used as hyperlink which is treated as a relative url. I have attached
the snapshot of the error

The solution can be simple not to encode.

> Go Back to File View link is not working in tail.jsp
> ----------------------------------------------------
>
>                 Key: HDFS-2025
>                 URL: https://issues.apache.org/jira/browse/HDFS-2025
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 0.20.1, 0.23.0
>            Reporter: sravankorumilli
>            Assignee: sravankorumilli
>            Priority: Minor
>         Attachments: ScreenShot_1.jpg
>
>
> While browsing the file system.
> Click on any file link to go to the page where the file contents are displayed, then
when we click on '*Tail this file*' link.
> The control will go to the tail.jsp here when we
> Click on '*Go Back to File View*' option.
> HTTP Error page not found will come.
> This is because the referrer URL is encoded and the encoded URL is itself being used
in the '*Go Back to File View*' hyperlink which will be treated as a relative URL and thus
the HTTP request will fail.

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