upstream app_server {
  server localhost:<%= upstream_port %> fail_timeout=0;
}

server {
  listen <%= port %> default deferred; # for Linux

  client_max_body_size 4G;
  server_name <%= server_name %>;

  keepalive_timeout 5;

  # path for static files
  root <%= web_root %>;

  # Prefer to serve static files directly from nginx to avoid unnecessary
  # data copies from the application server.
  try_files $uri/index.html $uri.html $uri @app;

  location @app {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    # enable this if you forward HTTPS traffic to unicorn,
    # this helps Rack set the proper URL scheme for doing redirects:
    proxy_set_header X-Forwarded-Proto $scheme;

    # pass the Host: header from the client right along so redirects
    # can be set properly within the Rack application
    proxy_set_header Host $http_host;

    # we don't want nginx trying to do something clever with
    # redirects, we set the Host: header above already.
    proxy_redirect off;

    proxy_pass http://app_server;
  }

  # Rails error pages
  error_page 500 502 503 504 /500.html;
  location = /500.html {
    root <%= web_root %>;
  }
}

<% if ssl -%>
server {
listen <%= ssl_port %>;
  client_max_body_size 4G;
  server_name <%= server_name %>;

  keepalive_timeout 5;

  # path for static files
  root <%= web_root %>;

  ssl on;
  ssl_certificate <%= ssl_cert_path %>;
  ssl_certificate_key <%= ssl_key_path %>;

  # Prefer to serve static files directly from nginx to avoid unnecessary
  # data copies from the application server.
  try_files $uri/index.html $uri.html $uri @app;

  location @app {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    # enable this if you forward HTTPS traffic to unicorn,
    # this helps Rack set the proper URL scheme for doing redirects:
    proxy_set_header X-Forwarded-Proto $scheme;

    # pass the Host: header from the client right along so redirects
    # can be set properly within the Rack application
    proxy_set_header Host $http_host;

    # we don't want nginx trying to do something clever with
    # redirects, we set the Host: header above already.
    proxy_redirect off;

    proxy_pass http://app_server;
  }

  # Rails error pages
  error_page 500 502 503 504 /500.html;
  location = /500.html {
    root <%= web_root %>;
  }
}
<% end -%>