url redirection only on exact match of domain, not if url is present

HTTP_HOST redirection using mod_rewrite on exact match of domain

[shib4u]

I want mod rewrite rules on the following conditions...

Main domain gets redirected to www

Sub-domain gets redirected to www if nothing is specified in the url

e.g.

example.com gets redirected to www.example.com
example.com/123.htm gets redirected to www.example.com/123.htm

sub.example.com gets redirected to www.example.com
sub.example.com/123.htm does NOT get redirected to www.example.com (i.e. stays as it is)

[g1smd]

What code have you tried so far?

What results did you get and how did those differ from what you expected?

[shib4u]

for the first part of the example... this works...
RewriteCond %{HTTP_HOST} !^www\.example\.com [NC]
RewriteCond %{HTTP_HOST} !^$
RewriteRule ^/(.*) http://www.example.com/$1 [L,R]

I'm not able to get to do the second part.

[g1smd]

Your code says "if hostname part of the request does not begin with www.example.com then redirect to www.example.com with a 302 redirect".

The code will not redirect non-canonical www requests that happen to include a port number.

The code works for all paths and files as specified by the (.*) part of the pattern.

With a leading slash in the RegEx pattern, your code will work inside httpd.conf but not inside .htaccess.

[shib4u]

Hi g1smd, thanks for explaining. The next part for rewrite which i want is....

subdomain.example.com gets redirected to www.example.com
subdomain.example.com/123.htm does NOT get redirected to www.example.com (i.e. stays as it is)

[shib4u]

RewriteCond %{HTTP_HOST} ^(.*)\.mydomain\.com$
RewriteCond %{HTTP_HOST} !^www\.mydomain\.com$
RewriteRule (.*) [mydomain.com...] [P]

?

[jdMorgan]

Something like:

# Code for use only in server config file, outside any <Directory> containers (will not work in .htaccess or inside a <Directory> container):
#
# If non-www hostname is requested
RewriteCond %{HTTP_HOST} ^example\.com [NC,OR]
# or if www.example.com hostname is requested with appended FQDN token and/or port number
RewriteCond %{HTTP_HOST} ^www\.example\.com(\.|\.?:[0-9]+)$ [NC,OR]
# or if any hostname other than www.example.com is requested with no additional URL-path
Rewritecond %{HTTP_HOST}/$1 !^www\.example\.com/.+$
# then externally redirect to www.example.com, retaining the originally-requested URL-path
RewriteRule ^/(.*) http://www.example.com/$1 [R=301,L]

For use in a top-level .htaccess file shared among multiple subdomains, remove the leading slash from the RewriteRule pattern.

Jim

[shib4u]

Thanks for the pointers Jim... i have finally implemented the following...

 RewriteEngine On
 Rewritecond %{HTTP_HOST}/$1 ^static\.example\.com [NC,OR]
 Rewritecond %{HTTP_HOST}/$1 ^origin.\stat\.example\.com [NC,OR]
 Rewritecond %{HTTP_HOST}/$1 ^stat\.example\.com [NC]
 RewriteCond %{REQUEST_URI} ^/$
 RewriteRule ^/(.*) http://www.example.com/$1 [L,R]

Note that my non-www to www is not in the above, since that VHost is in a different config, so that was not added in this block.