regex to redirect non www to www and subdomain to file

Question

I need to do the following .. have come across various examples but i need to combine three conditions

redirect 1) redirect non www / non subdomain requests. eg :

http://xyzsite.com to http://www.xyzsite.com

2) redirect if subdomain is mentioned . eg :

http://user1.xyzsite.com to http://www.xyzsite.com/profile?user1

3) redirect to mobile version. eg :

http://m.xyzsite.com to http://www.xyzsite.com/m

Tech details : I m on IIS ver 6 & using helicontech isapi_rewrite module

Answer 1

1.

• Match: ^xyzsite.com$
• Redirect: www.xyzsite.com

2.

• Match: ^(?!www.)(.*).xyzsite.com$
• Redirect: www.xyzsite.com/profile?$1

3.

• Match: ^m.(.*)$
• Redirect: www.$1/m

Answer 2

Here are the ISAPI_Rewrite v3 rules (hope this is the version you use):

RewriteBase /
RewriteCond %{HTTP_HOST} ^xyzsite\.com$
RewriteRule .? http://www.xyzsite.com [NC,R=301,L]

RewriteCond %{HTTP_HOST} ^m\.xyzsite\.com$
RewriteRule .? http://www.xyzsite.com/m [NC,R=301,L]

RewriteCond %{HTTP_HOST} ^(?!www\.)([^.]+)\.xyzsite\.com$
RewriteRule .? http://www.xyzsite.com/profile?%1 [NC,R=301,L]

Answer 3

I spent some time on this to hopefuly get you in the right direction. I come up with easiest solution unless you specified a constraint expliciterly. This means that I hardcode xyzsite.com in the regex. This actualy higlight the essense more of the solution

1) redirect non www / non subdomain requests. eg : http://xyzsite.com to http://www.xyzsite.com

pattern:
http://(.*?.com)

replacement:
http://www.$1

2) redirect if subdomain is mentioned . eg : http://user1.xyzsite.com to http://www.xyzsite.com/profile?user1

pattern:
(http://)(.*?)\.(.*)

replacement:
$1www.$3/profile?$2

3) redirect to mobile version. eg : http://m.xyzsite.com to http://www.xyzsite.com/m

pattern:
http://m\.(.*)

replacement:
http://www.$1/m

Hope this helps, Buckley