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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 45225] New: XBitHack breaks DirectoryIndex + MultiViews content negotiation
Date Wed, 18 Jun 2008 05:30:04 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=45225

           Summary: XBitHack breaks DirectoryIndex + MultiViews content
                    negotiation
           Product: Apache httpd-2
           Version: 2.2.8
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_include
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: matt@blissett.me.uk


Problem: The transfer of a document fails if it was chosen by Apache because of
DirectoryIndex and MultiViews, and XBitHack is set. 

Reproduction:

VirtualHost configuration:
<VirtualHost *:80>
        ServerName problem
        DocumentRoot /web/problem
        CustomLog "/var/log/apache2/problem" combined
        ErrorLog "/var/log/apache2/problem_e"

        Options +MultiViews +Includes

        DirectoryIndex index

        XBitHack Full
</VirtualHost>

The file in DocumentRoot:
$ echo '<!--#set var="a" value="ABC" -->T: <!--#echo var="a" -->' > index.html
$ chmod 744 index.html

Example HEAD request (works fine):
$ curl -I http://problem/
HTTP/1.1 200 OK
Date: Wed, 18 Jun 2008 05:08:43 GMT
Server: Apache
Content-Location: index.html
Vary: negotiate
TCN: choice
Accept-Ranges: bytes
Content-Type: text/html; charset=UTF-8

But a GET request hangs (curl hangs for 10 seconds before exiting with the
error, web browsers just fail and display an error):
$ curl http://problem/
T: ABC
curl: (18) transfer closed with outstanding read data remaining

The log records a successful request.

This request is fine:
$ curl http://problem/index
T: ABC

To "fix":
$ chmod 644 index.html
$ curl http://problem/
<!--#set var="a" value="ABC" -->T: <!--#echo var="a" -->

Bring back the SSI:
$ mv index.html index.shtml
$ curl http://problem/
T: ABC


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