How to add www. to domain with NginX and SSL? - ruby-on-rails

Question

I have a VPS with a Rails 4 app running on Ubuntu with NginX and Unicorn.
Since I want all pages to be SSL secured, all requests to http:// are forwarded to https:// which is working fine.
This is my NginX configuration:
user www-data;
worker_processes 4;
pid /var/run/nginx.pid;
events { worker_connections 1024; }
http {
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
server_tokens off;
server_names_hash_bucket_size 64;
# server_name_in_redirect off;
include /etc/nginx/mime.types;
default_type application/octet-stream;
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
gzip on;
gzip_disable "msie6";
gzip_types text/plain text/xml text/css text/comma-separated-values;
upstream app_server { server 127.0.0.1:8080 fail_timeout=0; }
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
server {
listen 80;
server_name myapp.com;
rewrite ^ https://$server_name$request_uri? permanent;
}
server {
listen 443;
server_name myapp.com;
root /home/rails/public;
index index.htm index.html;
ssl on;
ssl_certificate /etc/ssl/myapp.com.crt;
ssl_certificate_key /etc/ssl/myapp.com.key;
location / {
try_files $uri/index.html $uri.html $uri #app;
}
location #app {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Host $host;
proxy_pass http://app_server;
}
}
}
How can I make it that all requests to http://myapp.com and https://myapp.com are forwarded to https://www.myapp.com?
Thanks for any help.

Answer 1

You can go about this two ways:
In your Rails app, detect if the requested URI contains a www and give a 30(1|2) redirect based on that (probably easiest).
Create an additional vhost in Nginx listening on myapp.com and only have it do redirects to www.myapp.com.
server {
listen 443;
server_name myapp.com;
[add ssl config]
return 301 https://www.myapp.com$request_uri;
}