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Asked: 2019-04-04 21:36:23 +0800 CST

Redirect to 'www' prefix domain using nginx

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I brought a domain in godady and I have Installed Passenger + Nginx on a Linux/Unix(Ubuntu) server and deployed a Ruby app. Now my domain looks something like http://example.com when I try to request from a browser. But I want my domain to default redirect to www every time it is requested from a browser(like http://www.example.com.).

example.conf 

    server {
    listen 80;
    server_name www.example.com example.com;
    # return 301 $scheme://www.example.com$request_uri;
    # Tell Nginx and Passenger where your app's 'public' directory is
    root /var/www/example/public;

    # Turn on Passenger
    passenger_enabled on;
    passenger_spawn_method direct;
    passenger_min_instances 1;
    #passenger_pool_idle_time 0;
    rails_env development;
    passenger_ruby /usr/local/rvm/gems/ruby-2.3.3/wrappers/ruby;
    passenger_sticky_sessions on;


}

uncommenting the line

return 301 $scheme://www.example.com$request_uri;

is throwing the error

www.example.com redirected you too many times.
Try clearing your cookies.
ERR_TOO_MANY_REDIRECTS

I am forced to manually type www.example.com in the browser. Instead, how can I redirect to www by default?

Any Help is highly appreciated. Thanks in advance!

server dns ruby nginx

2 Answers

  1. Best Answer

    You basically need two server configuration chunks:

    • One for www; to be redirected to base domain only
    • One for the base domain

    Here is an example to get you started:

    server {
    listen 80;
    server_name www.example.com;

    location / {
        # Redirection happens here
        return 301 http://example.com$request_uri;
    }
}


server {
    listen 80 default_server;
    server_name example.com;

    # Other conf directives go here
}
    • 2

  2. The easiest way is probably to make use of NGINX if statements. Simply put the following in your virtual host configuration:

    if ($host = "example.com") {
    return 301 $scheme://www.$host$request_uri;
}

    and be sure to replace "example.com" with your domain name.

    While this is the simplest way I've found, it's not the best. The recommended route is to create a separate server block for non-www, and put the return statement there.

    • 0