More Eyeballs on my Poor mod_rewrite Attempt Please

We're changing the way users embed images in their blogs, but I need to make sure previously embedded images are still displayed.

I'm trying to redirect legacy image embed links to either a static image or a single legacy image embed handling file. I'm using mod_rewrite, but it appears I fail. Amazingly, I've managed to cobble together a functional ruleset that prevents hotlinking.

I'm having some difficulty with redirecting legacy embeds to the single legacy handler though. This rule comes under the hotlink set [L], so should only be evaluated if the embed request isn't a result of hotlinking.

Here is my attempt at redirecting all requests to any file like gp[2]?.php[5]?\?p=(.*)

    RewriteRule %{REQUEST_FILENAME} gp[2]?\.php[5]?(.*)=(.*)$ [NC]
    RewriteRule gp[2]?\.php[5]?(.*)=(.*)$ /legacy/gp.php5$1=$2 [L]

But it doesn't work, I just get my wonderful 404 page.

Some example requests:

http://ecpod.com/includes/gp.php5?p=cfcfbfbe5d9d63eab4a3e784bd30cfe016fcfcfbfbe5d9d6a19ebc57139d56bb
http://www.ecpod.com/includes/gp.php5?p=928e3888a526b462b684aea5609016f928e3888a585d0963ac4ebb335a522e09
http://www.ecpod.com/includes/gp2.php?p=cfcfbfbe5d9d63eab4a3e784bd30cfe016fcfcfbfbe5d9d6a19ebc57139d56bb

What I'm aiming for is to have any request that looks like one of those examples directed to:

http://ecpod.com/legacy/gp.php?p=HASH

Thank you for any help.

Edit:

Legacy urls will have gp|gp2, php|php5 and a query string of n length. They may not necessarily be in the includes directory. It's messy and horrible, I know. Image embeds are handled differently now, this shall never happen again.

Logs:

RewriteRule ^/(includes/)?gp2?\.php5?$ /legacy/gp.php5 [NC,L]

192.168.1.4 - - [06/Sep/2010:14:44:27 +1200] [www.ecpod-dev.dev/sid#2b7d543aa390][rid#2b7d68ec65a8/initial] (3) [perdir /site/http/web/] add path info postfix: /site/http/web/includes -> /site/http/web/includes/gp.php
192.168.1.4 - - [06/Sep/2010:14:44:27 +1200] [www.ecpod-dev.dev/sid#2b7d543aa390][rid#2b7d68ec65a8/initial] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/includes/gp.php -> includes/gp.php
192.168.1.4 - - [06/Sep/2010:14:44:27 +1200] [www.ecpod-dev.dev/sid#2b7d543aa390][rid#2b7d68ec65a8/initial] (3) [perdir /site/http/web/] applying pattern '^/(includes/)?gp2?\.php5?$' to uri 'includes/gp.php'
192.168.1.4 - - [06/Sep/2010:14:44:27 +1200] [www.ecpod-dev.dev/sid#2b7d543aa390][rid#2b7d68ec65a8/initial] (1) [perdir /site/http/web/] pass through /site/http/web/includes

RewriteCond %{QUERY_STRING} (^|&)(p=[^&]+)(&|$) [NC]
RewriteRule ^/(includes/)?gp2?\.php5?$ /legacy/gp.php5?%2 [NC,L]

192.168.1.4 - - [06/Sep/2010:14:43:53 +1200] [www.ecpod-dev.dev/sid#2b8a2ad73400][rid#2b8a2b0ed438/initial] (3) [perdir /site/http/web/] add path info postfix: /site/http/web/includes -> /site/http/web/includes/gp.php
192.168.1.4 - - [06/Sep/2010:14:43:53 +1200] [www.ecpod-dev.dev/sid#2b8a2ad73400][rid#2b8a2b0ed438/initial] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/includes/gp.php -> includes/gp.php
192.168.1.4 - - [06/Sep/2010:14:43:53 +1200] [www.ecpod-dev.dev/sid#2b8a2ad73400][rid#2b8a2b0ed438/initial] (3) [perdir /site/http/web/] applying pattern '^/(includes/)?gp2?\.php5?$' to uri 'includes/gp.php'
192.168.1.4 - - [06/Sep/2010:14:43:53 +1200] [www.ecpod-dev.dev/sid#2b8a2ad73400][rid#2b8a2b0ed438/initial] (1) [perdir /site/http/web/] pass through /site/http/web/includes


RewriteRule /gp2?\.php5?$ /legacy/gp.php5 [NC,L]

192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642705a8/initial] (3) [perdir /site/http/web/] add path info postfix: /site/http/web/includes -> /site/http/web/includes/gp.php
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642705a8/initial] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/includes/gp.php -> includes/gp.php
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642705a8/initial] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'includes/gp.php'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642705a8/initial] (2) [perdir /site/http/web/] rewrite 'includes/gp.php' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642705a8/initial] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642756c0/initial/redir#1] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642756c0/initial/redir#1] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642756c0/initial/redir#1] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642756c0/initial/redir#1] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b1264277fa8/initial/redir#2] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b1264277fa8/initial/redir#2] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b1264277fa8/initial/redir#2] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b1264277fa8/initial/redir#2] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427a7e8/initial/redir#3] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427a7e8/initial/redir#3] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427a7e8/initial/redir#3] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427a7e8/initial/redir#3] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427cfe0/initial/redir#4] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427cfe0/initial/redir#4] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427cfe0/initial/redir#4] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427cfe0/initial/redir#4] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427f948/initial/redir#5] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427f948/initial/redir#5] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427f948/initial/redir#5] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b126427f948/initial/redir#5] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c3048/initial/redir#6] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c3048/initial/redir#6] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c3048/initial/redir#6] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c3048/initial/redir#6] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c5800/initial/redir#7] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c5800/initial/redir#7] (3) [perdir /site/http/web/] applying pattern '/gp2?\.ph开发者_StackOverflow中文版p5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c5800/initial/redir#7] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c5800/initial/redir#7] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c81f0/initial/redir#8] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c81f0/initial/redir#8] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c81f0/initial/redir#8] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642c81f0/initial/redir#8] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642cad80/initial/redir#9] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642cad80/initial/redir#9] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642cad80/initial/redir#9] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642cad80/initial/redir#9] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642cd840/initial/redir#10] (3) [perdir /site/http/web/] strip per-dir prefix: /site/http/web/legacy/gp.php5 -> legacy/gp.php5
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642cd840/initial/redir#10] (3) [perdir /site/http/web/] applying pattern '/gp2?\.php5?$' to uri 'legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642cd840/initial/redir#10] (2) [perdir /site/http/web/] rewrite 'legacy/gp.php5' -> '/legacy/gp.php5'
192.168.1.4 - - [06/Sep/2010:14:45:37 +1200] [www.ecpod-dev.dev/sid#2b1256a153b0][rid#2b12642cd840/initial/redir#10] (1) [perdir /site/http/web/] internal redirect with /legacy/gp.php5 [INTERNAL REDIRECT]

Outside <Directory>:

http://www.ecpod-dev.dev/includes/gp.php?p=ff2287e8bb45572e38304afa184ba1a464016fff2287e8bb45572e0606111e7a

RewriteRule ^/(includes/)?gp2?\.php5?$ /legacy/gp.php5 [NC,L]

192.168.1.4 - - [06/Sep/2010:23:46:54 +1200] [www.ecpod-dev.dev/sid#2ac33a5a83d0][rid#2ac34f0c4608/initial] (1) [perdir /site/http/web/] pass through /site/http/web/includes

RewriteCond %{QUERY_STRING} (^|&)(p=[^&]+)(&|$) [NC]
RewriteRule ^/(includes/)?gp2?\.php5?$ /legacy/gp.php5?%2 [NC,L]

192.168.1.4 - - [06/Sep/2010:23:47:47 +1200] [www.ecpod-dev.dev/sid#2b02af320470][rid#2b02bcb7b688/initial] (1) [perdir /site/http/web/] pass through /site/http/web/includes

RewriteRule /gp2?\.php5?$ /legacy/gp.php5 [NC,L]

192.168.1.4 - - [06/Sep/2010:23:48:45 +1200] [www.ecpod-dev.dev/sid#2aea076a73b0][rid#2aea14f025a8/initial] (1) [perdir /site/http/web/] pass through /site/http/web/includes

The input to the RewriteRule test pattern will not contain the query string, so testing for it will prevent the rule from ever matching and applying.

Taking that into account, we can rework the rule into something like this:

RewriteRule ^(includes/)?gp2?\.php5?$ /legacy/gp.php5 [NC,L]

Assuming that the query string will already be in the format you want, we can just let mod_rewrite append it automatically by not specifying a replacement in our rewrite.

If you aren't sure that the query string will always be just p=HASH, and want to guarantee that it will be for the target script, we can extend the rule block to take that into account, looking for the p parameter in the query string and replacing the existing query string with just that piece:

RewriteCond %{QUERY_STRING} (^|&)(p=[^&]+)(&|$) [NC]
RewriteRule ^(includes/)?gp2?\.php5?$ /legacy/gp.php5?%2 [NC,L]

Per Roland Illig's comment, you could also do the following to be less restrictive on the directory the file is in:

RewriteCond %{REQUEST_URI} !^/legacy/
# Input to RewriteRule in .htaccess never has a leading slash, so make sure
# we're at the beginning or there was a slash before the filename
RewriteRule (^|/)gp2?\.php5?$ /legacy/gp.php5 [NC,L]

Edit: Changed rules to reflect how they would be defined in httpd.conf instead of .htaccess.
Edit: ...And then changed it back again.

This should do it:

RewriteRule ^\/includes\/gp\.php5?\?p=([a-f,0-9]{64})$ /legacy/gp.php?p=$1