nginx_rails_3_1

upstream app {
    server unix:/var/www/app.com/shared/sockets/unicorn.sock fail_timeout=0;
}
server {
    server_name  www.app.com;
    rewrite ^ $scheme://app.com$request_uri? permanent;
}

server {
    server_name  app.com;
    client_max_body_size 2G;
    server_name app.com;
    keepalive_timeout 5;
    root /var/www/app.com/current/public;
    access_log /var/www/app.com/shared/log/access.log;
    error_log /var/www/app.com/shared/log/error.log error;

    if ($request_method !~ ^(GET|HEAD|PUT|POST|DELETE|OPTIONS)$ ){
        return 405;
    }

    location ~ "^/assets/(.*/)*.*-[0-9a-f]{32}.*" {
        gzip_static on; # to serve pre-gzipped version
        expires     max;
        add_header  Cache-Control public;
    } 

    location / {
        gzip_static on; # to serve pre-gzipped version
        proxy_set_header  X-Real-IP  $remote_addr;
        proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header  X_FORWARDED_PROTO $scheme;
        proxy_set_header  X-Request-Start 't=$start_time';
        proxy_set_header  Host $http_host;
        proxy_intercept_errors on;
        proxy_redirect    off;

        try_files /system/maintenance.html /cache/$uri/index.html /cache/$uri.html $uri @app;
        error_page 404              /404.html;
        error_page 422              /422.html;
        error_page 500 502 503 504  /500.html;
        error_page 403              /403.html;
    }

    location @app {
        proxy_pass http://app;
    }

    location = /favicon.ico {
        expires    1w;
        add_header Cache-Control public;
    }
}