mod_rewrite: subdomain to controller

Question

So I have mydomain.tld, www.mydomain.tld and res.mydomain.tld all pointing to the same directory: /var/www/mydomain. In that directory, there's my codeigniter application.

So what I'm trying to do is to forward all requests made through res.mydomain.tld to a specific controller called resources.

What I have:

RewriteCond %{HTTP_HOST} ^res\.mydomain\.tld$ RewriteRule ^(.*)$ /index.php?/resources/$1 [L]

This produces a server error, my rewrite log doesn't provide any clues about why; it just shows some very weird logic being applied to the request string.

Any idea of why this isn't working?

What kind of server error, a 500 internal server error with the apache error page? — hakre
– hakre, Commented Jul 23, 2011 at 19:43
What does the error log say, if you're not getting useful info from the rewrite log? — Michael Berkowski
– Michael Berkowski, Commented Jul 23, 2011 at 19:43
hakre: yes. Michael: just that the request exceeded the limit of 10 internal redirects. — thwd
– thwd, Commented Jul 23, 2011 at 19:50

Alfonso Rubalcava · Accepted Answer · 2011-07-23 20:04:08Z

Leave your .htaccess was before.

In your routes.php

if($_SERVER["SERVER_NAME"]=="res.mydomain.tld"){ $route['default_controller'] = "resources"; }else{ //$route['default_controller'] = Your default controller... }

Gerben · Accepted Answer · 2011-07-23 19:42:42Z

You created a infinite loop. It keeps on rewriting, because the rules always match, and match again. Just add a rule like the following above your rule

RewriteRule ^index.php - [L]

This will prevent any remaining rules underneath it from executing if the (already rewritten) url starts with index.php

Michael Berkowski · Accepted Answer · 2011-07-23 19:42:30Z

2

Make sure that index.php isn't matching and going into a rewrite loop:

RewriteCond %{REQUEST_URI} !^index\.php RewriteCond %{HTTP_HOST} ^res\.mydomain\.tld$ RewriteRule ^(.*)$ /index.php?/resources/$1 [L]

answered Jul 23, 2011 at 19:42

Michael Berkowski

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3 Comments

thwd Over a year ago

but shouldn't the [L] flag avoid further rewriting of the same request?

Michael Berkowski Over a year ago

@Tom, no because it's not another rule being processed. After the redirect to index.php, the same rule matches again and the redirect happens again. (and again and again)

Gerben Over a year ago

the [L] prevent rules underneath the current one from being applied. But after it is done and the url has been rewritten, it starts the whole process again for the new url.

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