# This is an example nginx config used to serve your Sandstorm server over SSL/TLS/HTTPS.
#
# Definitions like these should go in the "http" block of your nginx config.  Replace "example.com"
# with the domain of your Sandstorm install. On a Debian/Ubuntu system, you can copy this into
# /etc/nginx/sites-enabled/.

# This magic stanza is ESSENTIAL to avoid breaking WebSockets.
#
# Specifically, for WebSocket forwarding, we want to forward the `Connection` header.
# This "map" declaration helps with that.
map $http_upgrade $connection_upgrade {
  default upgrade;
  ''      close;
}


# The following stanza does a HTTP -> HTTPS redirect.
server {
  listen 80;
  server_name example.com *.example.com;
  return 301 https://$host$request_uri$is_args$args;
}

# Configuration for Sandstorm shell and apps, over HTTPS.
server {
  # http2 requires Nginx >=1.9.5
  listen 443 ssl http2;
  server_name example.com *.example.com;

  ssl_certificate /etc/nginx/ssl/sandstorm.crt;
  ssl_certificate_key /etc/nginx/ssl/sandstorm.key;

  ssl_session_timeout 5m;
  ssl_session_cache shared:MozSSL:10m;  # about 40000 sessions
  ssl_session_tickets off;

  # curl https://ssl-config.mozilla.org/ffdhe2048.txt > /path/to/dhparam.pem
  ssl_dhparam /path/to/dhparam.pem;

  # Configure SSL with forward secrecy and other goodies.
  # Ciphersuite taken from https://wiki.mozilla.org/Security/Server_Side_TLS
  # "Intermediate compatibility" as of 2019-09-12
  # TLSv1.3 requires Nginx >=1.13.0 & OpenSSL >=1.1.1
  ssl_protocols TLSv1.2 TLSv1.3;
  ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
  ssl_prefer_server_ciphers off;

  # HSTS prevents attackers from tricking you into connecting via HTTP in the
  # future, but if you actually intend to access the server via non-SSL in the
  # future then you should probably delete this line.
  add_header Strict-Transport-Security "max-age=63072000" always;

  # OCSP stapling, requires Intermediate cert
  #ssl_stapling on;
  #ssl_stapling_verify on;

  # verify chain of trust of OCSP response using Root CA and Intermediate certs
  #ssl_trusted_certificate /path/to/root_CA_cert_plus_intermediates;

  location / {
    proxy_pass http://127.0.0.1:6080;

    # Forward the Host header, which is used to route requests for
    # static content published from Sandstorm apps.
    proxy_set_header Host $http_host;

    # Forward WebSocket.
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;
    proxy_set_header X-Real-IP $remote_addr;
  }

  # Allow large spk uploads from the /install form and allow grains to receive large uploads.
  client_max_body_size 1024m;
}

### The following commented-out configuration works for HTTP reverse proxying, if
### for some reason you can't use HTTPS. In that case, remove the HTTP->HTTPS
### redirect config stanza above.

# server {
#   listen 80;
#   server_name example.com *.example.com;
#
#   location / {
#     proxy_pass http://127.0.0.1:6080;
#
#     # Forward the Host header, which is used to route requests for
#     # static content published from Sandstorm apps.
#     proxy_set_header Host $http_host;
#
#     # Forward WebSocket.
#     proxy_http_version 1.1;
#     proxy_set_header Upgrade $http_upgrade;
#     proxy_set_header Connection $connection_upgrade;
#     proxy_set_header X-Real-IP $remote_addr;
#   }
#
#   # Allow large spk uploads from the /install form and allow grains to receive large uploads.
#   client_max_body_size 1024m;
# }