Multiple RewriteRules for single RewriteCond in .htaccess - apache

Question

I have following command in my .htaccess
RewriteCond %{HTTP_HOST} ^(www\.)?([a-z0-9-]+)\.example\.com [NC]
RewriteRule ^(.*?)-([a-z]+) %2/$1.$2 [L]
RewriteRule ^(.*?)-([0-9]+)([a-z]) %2/$1$3.$2 [L]
%2 is not working in second and later lines.
Can I define any variable for %2 and use it in all RewriteRule commands?
Following command works
RewriteCond %{HTTP_HOST} ^(www\.)?([a-z0-9-]+)\.example\.com [NC]
RewriteRule ^(.*?)-([a-z]+) %2/$1.$2 [L]
RewriteCond %{HTTP_HOST} ^(www\.)?([a-z0-9-]+)\.example\.com [NC]
RewriteRule ^(.*?)-([0-9]+)([a-z]) %2/$1$3.$2 [L]
But I want use %2 for multiple rule line without duplicating condition.

Answer 1

You can use the RewriteRule flag S|skip to tie multiples RewriteRules to a single RewriteCond (or to a set of RewriteConds). Here is an example that applies one Cond to three Rules:
RewriteCond %{HTTP_HOST} !^www.mydomain.com$
# skip rules if NOT within domain - only way to tie multiple rules to one cond
RewriteRule .? - [S=3]
RewriteRule ^path1(/.*)$ /otherpath1$1
RewriteRule ^path2(/.*)$ /otherpath2$1
RewriteRule ^path3(/.*)$ /otherpath3$1
To change an existing Cond to work for multiple Rules you have to:
Negate the condition (prepend it with !)
If you have multiple RewriteConds: Change logical ANDs in the Conds to ORs and vice versa.
Add a skipping rewrite rule in front of all rules that you want to tie to the condition(s). Set the S parameter to the number of Rule lines to be skipped.
Please be aware that it is not possible to use any backreferences that point back to the RewriteCond (like %1) in the skipped Rules. These are only accessible in the skipping RewriteRule.

Answer 2

The variable must be saved as an Apache var, then that can be used without repeated conditions.
Saving in Apache variables are shown in second line. Usage of saved vars in 3th and 4th lines.
RewriteCond %{HTTP_HOST} ^(www\.)?([a-z0-9-]+)\.example\.com [NC]
RewriteRule .? - [E=Wa:%1,E=Wb:%2]
RewriteRule ^(.*?)-([a-z]+) %{ENV:Wb}/$1.%{ENV:Wb} [L]
RewriteRule ^(.*?)-([0-9]+)([a-z]) %{ENV:Wb}/$1$3.$2 [L]

Answer 3

Clearly, this isn’t much fun, especially as things grow and become more complex. However, there is a less well known option of the RewriteRule statement, that tells apache to skip the next N number of RewriteRule statement. [S=N]. So instead of checking each time if the request is NOT a file AND is NOT a directory, we could do this:
Code block
#
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule .* - [S=3]
RewriteRule ^([^./]+)/$ http://www.santweb.co.uk/$1 [L]
RewriteRule ^([^./]+)/([^./]+)/$ http://www.santweb.co.uk/$1/$2 [L]
RewriteRule ^([^./]+)/([^./]+)/([^./]+)/$ http://www.santweb.co.uk/$1/$2/$3 [L]
#
I found this, from: http://www.sant-media.co.uk/2010/03/applying-rewritecond-to-multiple-rewriterule-in-htaccess/
I think it helpfull

Answer 4

From Apache 2.4 you can use the <If> directive:
RewriteEngine On
<If "%{HTTP:Upgrade} == 'websocket'">
RewriteRule /nidoran/(.*) ws://localhost:8080/nidoran/$1 [P,L]
RewriteRule /kakuna/(.*) ws://localhost:8081/kakuna/$1 [P,L]
RewriteRule /porygon/(.*) ws://localhost:8082/porygon/$1 [P,L]
</If>
http://httpd.apache.org/docs/2.4/expr.html#examples