Bug 56434 - Rewrite rule for root / matches, but end flag is ignored (subreq for index files still proceeds)
Summary: Rewrite rule for root / matches, but end flag is ignored (subreq for index fi...
Status: RESOLVED DUPLICATE of bug 53929
Alias: None
Product: Apache httpd-2
Classification: Unclassified
Component: mod_rewrite (show other bugs)
Version: 2.4.7
Hardware: PC Linux
: P2 major (vote)
Target Milestone: ---
Assignee: Apache HTTPD Bugs Mailing List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-04-20 02:36 UTC by Norm
Modified: 2014-04-20 18:14 UTC (History)
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Description Norm 2014-04-20 02:36:18 UTC 
As first asked on http://bit.ly/1hYKkHC and http://bit.ly/1hYKtL9

Apache 2.4.7 on Ubuntu 14.04. The rewrite rule is simple:

RewriteCond %{REQUEST_URI} ^/?$
RewriteRule ^ /web/wp-content/cache/page_enhanced/HOSTNAME/_index.html [L]

Basically, I want to serve an .html file for /. The .html file exists and is served fine if requested directly. As you can see in the debug logs below the cond on / does match (initial), but then Apache proceeds (subreq) and tries to match /index.html, /index.cgi, /index.pl and /index.php, and finally serves /index.php.

This is not expected since [L] should prevent Apache from continuing once a match is found.

I can confirm that this problem does not exist in Apache 2.2.

Also, this appears to be a problem only for /. The same rule but for a subdirectory works as expected, i.e.:

RewriteCond %{REQUEST_URI} ^/subdir/?$
RewriteRule ^ /web/wp-content/cache/page_enhanced/HOSTNAME/subdir/_index.html [L]

... works just fine.

Rewrite debug logs:

# grep rewrite: /var/log/apache2/error.log
[Sat Apr 19 20:40:14.581933 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabc90a0/initial] [perdir /var/www/HOSTNAME/] strip per-dir prefix: /var/www/HOSTNAME/ -> 
[Sat Apr 19 20:40:14.581957 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabc90a0/initial] [perdir /var/www/HOSTNAME/] applying pattern '.*' to uri ''
[Sat Apr 19 20:40:14.581963 2014] [rewrite:trace4] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabc90a0/initial] [perdir /var/www/HOSTNAME/] RewriteCond: input='/' pattern='^/?$' => matched
[Sat Apr 19 20:40:14.581966 2014] [rewrite:trace2] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabc90a0/initial] [perdir /var/www/HOSTNAME/] rewrite '' -> '/web/wp-content/cache/page_enhanced/HOSTNAME/_index.html'
[Sat Apr 19 20:40:14.581969 2014] [rewrite:trace1] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabc90a0/initial] [perdir /var/www/HOSTNAME/] internal redirect with /web/wp-content/cache/page_enhanced/HOSTNAME/_index.html [INTERNAL REDIRECT]
[Sat Apr 19 20:40:14.582407 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] strip per-dir prefix: /var/www/HOSTNAME/index.html -> index.html
[Sat Apr 19 20:40:14.582414 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] applying pattern '.*' to uri 'index.html'
[Sat Apr 19 20:40:14.582418 2014] [rewrite:trace4] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] RewriteCond: input='/index.html' pattern='^/?$' => not-matched
[Sat Apr 19 20:40:14.582420 2014] [rewrite:trace1] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] pass through /var/www/HOSTNAME/index.html
[Sat Apr 19 20:40:14.582767 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] strip per-dir prefix: /var/www/HOSTNAME/index.cgi -> index.cgi
[Sat Apr 19 20:40:14.582772 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] applying pattern '.*' to uri 'index.cgi'
[Sat Apr 19 20:40:14.582775 2014] [rewrite:trace4] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] RewriteCond: input='/index.cgi' pattern='^/?$' => not-matched
[Sat Apr 19 20:40:14.582777 2014] [rewrite:trace1] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] pass through /var/www/HOSTNAME/index.cgi
[Sat Apr 19 20:40:14.583131 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] strip per-dir prefix: /var/www/HOSTNAME/index.pl -> index.pl
[Sat Apr 19 20:40:14.583136 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] applying pattern '.*' to uri 'index.pl'
[Sat Apr 19 20:40:14.583143 2014] [rewrite:trace4] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] RewriteCond: input='/index.pl' pattern='^/?$' => not-matched
[Sat Apr 19 20:40:14.583146 2014] [rewrite:trace1] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] pass through /var/www/HOSTNAME/index.pl
[Sat Apr 19 20:40:14.583375 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] strip per-dir prefix: /var/www/HOSTNAME/index.php -> index.php
[Sat Apr 19 20:40:14.583380 2014] [rewrite:trace3] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] applying pattern '.*' to uri 'index.php'
[Sat Apr 19 20:40:14.583383 2014] [rewrite:trace4] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] RewriteCond: input='/index.php' pattern='^/?$' => not-matched
[Sat Apr 19 20:40:14.583386 2014] [rewrite:trace1] [pid 20459] mod_rewrite.c(468): [client 192.168.198.1:14715] 192.168.198.1 - - [HOSTNAME/sid#7fd7ed4f0528][rid#7fd7dabcd0a0/subreq] [perdir /var/www/HOSTNAME/] pass through /var/www/HOSTNAME/index.php
Comment 1 Eric Covener 2014-04-20 12:14:02 UTC 
mod_dir is looking for DirectoryIndex'es. There is a fix to the interaction between the two mods in 2.4.9, can you confirm it fixes your problem?

  *) mod_dir: Don't search for a DirectoryIndex or DirectorySlash on a URL
     that was just rewritten by mod_rewrite. PR53929. [Eric Covener]
Comment 2 Norm 2014-04-20 17:52:00 UTC 
I just tried 2.4.9 and indeed the reported problem is gone. If any Ubuntu users read this, there is a fairly actively maintained PPA at https://launchpad.net/~ondrej/+archive/apache2 which works fine in Trusty, so no need to compile.
Comment 3 Eric Covener 2014-04-20 18:14:05 UTC 
thanks for verifying

*** This bug has been marked as a duplicate of bug 53929 ***