Multisite support about uploads-by-proxy HOT 2 OPEN

This seems to be working correctly for us on a multisite. The only thing that needed to be changed was the server rewriterule in the config/htaccess.

The default WP .htaccess has this:
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
Which essentially rewrites the path to strip out the subdirectory. The problem with this, is that when the file doesn't exist and it falls through to index.php the REQUEST_URI is still the original path. To solve this, change [L] to [P] which will perform a proxy redirect and use the rewritten URI instead. Note, you'll need to enable mod_proxy_http for this to work correctly.

Given that is all I needed to do to fix multisite support, can we replace the fail message with an admin notice that can instead give some tips on how to set it up?

from uploads-by-proxy.

My actual rules in a <Directory> block as part of a VirtualHost, in case anybody has any trouble (this has actually been tweaked to work with multisites that use multiple levels of subdirectories).

<IfModule mod_rewrite.c>
    RewriteEngine On

    # add a trailing slash to /wp-admin
    RewriteRule ^(.*/)?wp-admin$ $1wp-admin/ [R=301,L]

    RewriteCond %{REQUEST_FILENAME} -f [OR]
    RewriteCond %{REQUEST_FILENAME} -d
    RewriteRule ^ - [L]
    RewriteRule "/.+(/(wp-content|wp-admin|wp-includes|.*\.php$).*)" $1 [P]
    RewriteRule ^ /index.php [L]
</IfModule>

If you have SSL enabled, you'll also need to add to your SSL section:

SSLProxyEngine on

from uploads-by-proxy.