问题:

How can you create a permanent redirect (301) in Passenger? There are posts elsewhere on how to perform the redirect in Rails, but it seems better to do the redirect at the server level rather than at the Rails level.

Any clues?

Thanks!

回答1:

Server-level redirects are done with the HTTP server, not the Application server. Here's some examples:

Apache

<VirtualHost xxx.xxx.xxx.xxx:80>
    ServerAlias example.com
    Redirect Permanent / http://www.example.com
</VirtualHost>

Nginx

server {
  server_name example.com;
  rewrite ^/(.*) http://www.example.com/$1 permanent;
}

Lighttpd

$HTTP["host"] =~ "^example\.com$" {
  url.redirect = ( "^/(.*)" => "http://www.example.com/$1" )
}

While it's technically possible to achieve this later in the stack, like with a Rack app, it makes the most sense to do this as early as possible to save your server cpu cycles. Sometimes you have to do this later, for instance with a host like Heroku that won't let you change your HTTP settings, but if you have the option to do it here that's what I recommend.