Ruby in Rails www subdomain redirect -

here ruby on rails code redirect request https://example.com https://www.example.com:

class applicationcontroller < actioncontroller::base before_filter :add_www_subdomain  private      def add_www_subdomain       if rails.env.production?         unless /^www/.match(request.host)           redirect_to("#{request.protocol}www.#{request.host_with_port}",status: 301)         end       end     end end 

now issue is, when lands @ https://example.com/product/abc being redirected https://www.example.com supposedly, should go https://www.example.com/product/abc. there trick this? thanks

redirect_to("#{request.protocol}www.#{request.host_with_port}#{request.fullpath}",status: 301) 

i think kind of redirect more suited web server. these rules:

apache

<virtualhost *:80>   servername example.com   redirect permanent / http://www.example.com/ </virtualhost> 

source

nginx

server {     listen 80;     server_name www.domain.com;     # $scheme http protocol     # , 301 best practice tablet, phone, desktop , seo     return 301 $scheme://domain.com$request_uri; 

}

server {     listen 80;     server_name domain.com;     # here goes rest of config file     # example      location / {          rewrite ^/cp/login?$ /cp/login.php last;         # etc etc...      } } 

source