server {
    listen 80;

    charset utf-8;
    set $root_path '/go/src/app';
    root $root_path;

    proxy_cache_use_stale error timeout invalid_header http_502;
    proxy_cache_min_uses 1;

    location / {
        proxy_pass http://app;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;

        proxy_cache cache;
        proxy_cache_valid 30m;
    }

    location /minecraft.php {
        if ($arg_name = "") {
            return 400;
        }

        if ($arg_type = "cloack") {
            rewrite .* http://skins.minecraft.net/MinecraftCloaks/$arg_name.png? permanent;
            break;
        }

        if ($arg_type = "skin") {
            rewrite .* /skins/$arg_name last;
            break;
        }

        return 404;
    }

    location /cloaks/ {
        try_files $uri $uri.png @cloaks;
    }

    location @cloaks {
        rewrite ^/cloaks/(.+?)(\.[^.]*$|$)$ http://skins.minecraft.net/MinecraftCloaks/$1.png? permanent;
    }

    location ~* ^/skins/$ {
        if ($arg_name = "") {
            return 400;
        }

        rewrite .* /skins/$arg_name last;
    }

    location ~* ^/cloaks/$ {
        if ($arg_name = "") {
            return 400;
        }

        rewrite .* /cloaks/$arg_name last;
    }
}