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I am trying to redirect requests from a umlaut domain to another domain.

My following code works with ANY other domain, but not umlaut:

<IfModule mod_rewrite.c>
  RewriteCond %{HTTPS} !=on
  RewriteCond %{HTTP_HOST} ^(www\.)?frankfurter-flöhe\.de/$ [NC]
  RewriteRule ^ [R=301,L]

However, when I call the umlaut domain and then copy it from Google Chrome's address bar, I get this:

Although, if I use that obfuscated domain in my htaccess file instead of the "real" umlaut domain, it doesn't work either.

Does anybody have an idea how to match that domain?

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migrated from Oct 4 '12 at 13:36

This question came from our site for professional and enthusiast programmers.

"that obfuscated domain" is in Punycode and is how internationalised domains are stored in DNS. – w3d Mar 8 at 9:03

Did you try with :

RewriteEngine On
RewriteCond %{HTTP_HOST} ^frankfurter-flö$ [OR]
RewriteCond %{HTTP_HOST} ^www.frankfurter-flö$
RewriteRule (.*)$ [R=301,L]
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You simply split up my condition into two conditions. My condition works perfectly well with other domain names but not with the umlaut domain. Splitting it up makes no difference. – Christian Engel Oct 4 '12 at 10:09
Yes but I want to check if when splitting your conditions, it solves the problem, because redirection on frankfurter-flö works, but not www.frankfurter-flö redirection – Laurent Brieu Oct 4 '12 at 10:18
Nope, it does not work. – Christian Engel Oct 4 '12 at 13:15

Try using the NE flag, to prevent mod_rewrite from encoding the URL. For more information about NE:

<IfModule mod_rewrite.c>
  RewriteCond %{HTTPS} !=on
  RewriteCond %{HTTP_HOST} ^(www\.)?frankfurter-flöhe\.de/$ [NC,NE]
  RewriteRule ^ [R=301,L]

If this doesn't work, try to use the HEX equivalent of umlaut, as suggested in: Umlauts in htaccess redirects

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I tried this already (as mentioned above) and it doesn't work. – Christian Engel Oct 4 '12 at 10:09
I updated my answer to use the NE flag instead. – Kao Oct 4 '12 at 10:31
The NE flag results in an error 500 – Christian Engel Oct 4 '12 at 13:10
Did you add the space after NC, NE? That might cause the 500 error. I removed it from the answer. It might also be [NC] [NE] - Not really sure. I will run some tests later if you don't get it working. – Kao Oct 4 '12 at 13:22
The error appears with and without the space, as well as when only the NE flag is used. – Christian Engel Oct 4 '12 at 13:30

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