Serve pages based on domain by using htaccess

Question

I have a site mysite.com with different sections. There are several domains pointing to the same site. What I'm trying to achieve is.

Say if my site has the domains mysite.com, section1.com and section2.com.

If the user comes from section1.com the user should get mysite.com/section1/ it should not be redirected, it should be rewritten like this :

1. mysite.com/section1/something should become section1.com/something
2. mysite.com/section1/another should become section1.com/another

Same way if the user is coming from section2.com the content served should be mysite.com/section2/ and the domain rewritten like

1. mysite.com/section2/something should become section2.com/something
2. mysite.com/section2/another should become section2.com/another

Answer 1

This seems like a case for mod_rewrite.

Something like this ought to do the trick:

RewriteEngine on
RewriteRule   ^(.+)                        %{HTTP_HOST}$1          [C]
RewriteRule   ^([^.]+\.com)(/.*)           http://mysite.com/$1$2  [P]

You will need to enable both mod_rewrite and mod_proxy (a2enmod rewrite && a2enmod proxy) for this to work.

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It's worth noting that if the request is for http://www.section2.com/foo this will not work. If you want to account for subdomains (and strip them), you should use this for the second RewriteRule instead:

RewriteRule   ^([^/]*\.)?([^.]+\.com)(/.*)           http://mysite.com/$2$3  [P]