How do I use .htaccess conditional redirects for multiple domains?

Question

I'm managing about 15 or so domains for a particular promotion. Each domain has specific redirects in place, as shown below. Rather than make 15 different .htaccess files that I would later have to manage separately, I'd like to use a single .htaccess file and use a symbolic link into each website's directory.

The trouble is that, I can't figure out how to make the rules apply only for a specific domain. Every time I visit www.redirectsite2.com, it sends me to www.targetsite.com/search.html?state=PA&id=75, when it should instead be sending me to www.targetsite.com/search.html?state=NJ&id=68.

How exactly do I make multiple RewriteRules apply for a given domain and only that domain? Is this even possible to do within a single .htaccess file?

Options +FollowSymlinks # redirectsite1.com RewriteEngine On RewriteBase / # start processing rules for www.redirectsite1.com RewriteCond %{QUERY_STRING} ^$ RewriteCond %{HTTP_HOST} ^www\.redirectsite1\.com$ # rule for organic visit first RewriteRule ^$ http://targetsite.com/search.html?state=PA&id=75 [QSA,R,L] RewriteRule ^PGN$ http://targetsite.com/search.html?state=PA&id=26 [QSA,R,NC,L] RewriteRule ^NS$ http://targetsite.com/search.html?state=PA&id=27 [QSA,R,NC,L] RewriteRule ^INQ$ http://targetsite.com/search.html?state=PA&id=28 [QSA,R,NC,L] RewriteRule ^AA$ http://targetsite.com/search.html?state=PA&id=29 [QSA,R,NC,L] RewriteRule ^PI$ http://targetsite.com/search.html?state=PA&id=30 [QSA,R,NC,L] RewriteRule ^GV$ http://targetsite.com/search.html?state=PA&id=31 [QSA,R,NC,L] # catch-all rule, using the same id as the organic visit RewriteRule ^([a-z]+)?$ http://targetsite.com/search.html?state=PA&id=75 [QSA,R,NC,L] # end processing rules for www.redirectsite1.com # begin rules for redirectsite2.com RewriteCond %{QUERY_STRING} ^$ RewriteCond %{HTTP_HOST} ^www\.redirectsite2\.com$ # rule for organic visit first RewriteRule ^$ http://targetsite.com/search.html?state=NJ&id=68 [QSA,R,L] RewriteRule ^SL$ http://targetsite.com/search.html?state=NJ&id=6 [QSA,R,NC,L] RewriteRule ^APP$ http://targetsite.com/search.html?state=NJ&id=8 [QSA,R,NC,L] # catch-all rule, using the same id as the organic visit RewriteRule ^([a-z]+)?$ http://targetsite.com/search.html?state=NJ&id=68 [QSA,R,NC,L]

Thanks for any help you may be able to provide!

dialt0ne · Accepted Answer · 2011-02-05 03:59:04Z

One option would be to put the rewrite rules into different <VirtualHost> blocks. e.g.:

<VirtualHost *:80> ServerName www.redirectsite1.com RewriteEngine On RewriteRule ^$ http://targetsite.com/search.html?state=PA&id=75 [QSA,R,L] RewriteRule ^PGN$ http://targetsite.com/search.html?state=PA&id=26 [QSA,R,NC,L] RewriteRule ^NS$ http://targetsite.com/search.html?state=PA&id=27 [QSA,R,NC,L] RewriteRule ^INQ$ http://targetsite.com/search.html?state=PA&id=28 [QSA,R,NC,L] RewriteRule ^AA$ http://targetsite.com/search.html?state=PA&id=29 [QSA,R,NC,L] RewriteRule ^PI$ http://targetsite.com/search.html?state=PA&id=30 [QSA,R,NC,L] RewriteRule ^GV$ http://targetsite.com/search.html?state=PA&id=31 [QSA,R,NC,L] # catch-all rule, using the same id as the organic visit RewriteRule ^([a-z]+)?$ http://targetsite.com/search.html?state=PA&id=75 [QSA,R,NC,L] </VirtualHost> <VirtualHost *:80> ServerName www.redirectsite2.com RewriteEngine On # rule for organic visit first RewriteRule ^$ http://targetsite.com/search.html?state=NJ&id=68 [QSA,R,L] RewriteRule ^SL$ http://targetsite.com/search.html?state=NJ&id=6 [QSA,R,NC,L] RewriteRule ^APP$ http://targetsite.com/search.html?state=NJ&id=8 [QSA,R,NC,L] # catch-all rule, using the same id as the organic visit RewriteRule ^([a-z]+)?$ http://targetsite.com/search.html?state=NJ&id=68 [QSA,R,NC,L] </VirtualHost>

Another option would be to put RewriteCond %{HTTP_HOST} ^www\.redirectsite1\.com$ before each and every RewriteRule for site 1 and RewriteCond %{HTTP_HOST} ^www\.redirectsite2\.com$ before each and every RewriteRule for site 2.

I'm going to go with the second option, which works really well, albeit a little less elegant looking. Thanks! — John
– John, Commented Feb 2, 2011 at 15:26

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