Apache Redirect folder to subdomain

Question

A client had an application at www.example.com/dir. They have now set up a subdomain at dir.example.com. The subdomain references the files stored at www.example.com/dir. They'd now like people accessing www.example.com/dir to be redirected to dir.example.com.

I'm guessing I need a .htaccess to sit in www.example.com/dir and if it's accessed with www, redirect to the subdomain, just not sure of the syntax.

score 8 · Answer 1 · edited Aug 02 '20 at 13:01

8

What about simply:

Redirect /dir http://dir.example.com

edited Aug 02 '20 at 13:01

MrWhite

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answered Sep 08 '09 at 20:36

mdpc

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This should be correct answer. – hakkikonu Sep 09 '16 at 02:38
Use `RedirectPermanent` (or `Redirect 301` or `Redirect permanent`) instead for a 301 redirect (as opposed to a 302 - temporary). – MrWhite Aug 02 '20 at 16:11

score 7 · Answer 2 · edited Aug 02 '20 at 12:42

7

Add a .htaccess to the directory belonging to www.example.com/dir:

RewriteEngine on
RewriteCond ${HTTP_HOST} ^www\.example\.com$
RewriteRule ^(.*) http://dir.example.com/$1 [R,L]

The first line enables mod_rewrite, the second line checks that the current request is using hostname www.example.com to access the resource, and the third line redirects all such requests to the desired target hostname.

edited Aug 02 '20 at 12:42

MrWhite

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answered Sep 08 '09 at 19:34

earl

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[R] yields 302 Moved Temporarily. You may want to use [R=301] to get 301 Moved Permanently. – Arjan Sep 08 '09 at 20:09
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Do it the 302 way until you're sure it's working, then switch to the 301. – TRiG Jul 04 '11 at 10:51

score 1 · Answer 3 · answered Sep 18 '09 at 12:38

Try this rule in a .htaccess file in your /dir directory:

RewriteCond %{HTTP_HOST} !=dir.example.com
RewriteRule .* http://dir.example.com/$0 [L,R=301]

Or this rule in your root directory:

RewriteCond %{HTTP_HOST} !=dir.example.com
RewriteRule ^dir(/(.*))?$ http://dir.example.com/$2 [L,R=301]

score 0 · Answer 4 · edited Aug 02 '20 at 12:48

0

djhowell was almost there:

RewriteEngine on
RewriteCond %{HTTP_HOST} ^(www\.)?example\.com$
RewriteRule ^/dir(/.*)?$ http://dir.example.com$1 [R=301,L]

You need the leading slash in the RewriteRule or nothing will match. The (/.*)?$ bit means match 0 or 1 slash-then-anything chunks to the end of the URI. (This is important -- without it we'd also match www.example.com/dirsomethingelse).

www.example.com/dir -> dir.example.com
www.example.com/dir/ -> dir.example.com/
www.example.com/dir/blah.html -> dir.example.com/blah.html

edited Aug 02 '20 at 12:48

MrWhite

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answered Sep 08 '09 at 20:11

markdrayton

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@earl had the .htaccess *inside* the /dir folder, so it basically does the same. (Except for making the `www.`-part optional.) – Arjan Sep 08 '09 at 23:28
Yep, didn't notice that. We seldom use .htaccess so I'm always thinking of the main configuration file. – markdrayton Sep 09 '09 at 07:27
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Using `.htaccess` in this case saves you the trouble of having to match `/dir/` explicitly. – earl Sep 09 '09 at 18:11
"You need the leading slash in the `RewriteRule` or nothing will match." - This is only if the directives are being used in a _server_ or _virtualhost_ context. The OP is suggesting the use of `.htaccess` (_directory_ context) - in this case the leading slash should be omitted. – MrWhite Aug 02 '20 at 12:53

score -1 · Answer 5 · edited Aug 02 '20 at 12:43

-1

This should work:

RewriteEngine on
RewriteCond %{HTTP_HOST} ^(www\.)?example\.com$
RewriteRule ^dir/(.*) http://dir.example.com/$1 [R=301,L]

edited Aug 02 '20 at 12:43

MrWhite

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answered Sep 08 '09 at 19:45

djhowell

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Additional explanation is required. This won't work if it was to be used in the `.htaccess` inside the `/dir` subdirectory as suggested in the question. If you include the `dir/` in the `RewriteRule` _pattern_ then it will need to go in the `.htaccess` file in the _document root_. – MrWhite Aug 02 '20 at 12:45

Apache Redirect folder to subdomain

5 Answers5