load_module modules/ngx_http_brotli_static_module.so;

user nginx;
worker_processes auto;
worker_rlimit_nofile 8192;
pid /run/nginx.pid;

events {
    worker_connections 4096;
}

http {
    include mime.types;
    default_type application/octet-stream;

    charset utf-8;

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 4096;
    server_tokens off;

    client_max_body_size 1k;
    client_body_buffer_size 1k;
    client_header_buffer_size 1k;
    large_client_header_buffers 4 4k;
    http2_max_field_size 4k;
    http2_max_header_size 16k;
    http2_recv_buffer_size 128k;

    client_body_timeout 30s;
    client_header_timeout 30s;
    send_timeout 30s;
    http2_recv_timeout 30s;

    http2_max_concurrent_streams 32;
    limit_conn_zone $binary_remote_addr zone=addr:10m;
    limit_conn addr 256;

    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256;
    ssl_prefer_server_ciphers on;

    ssl_certificate /etc/letsencrypt/live/grapheneos.org/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/grapheneos.org/privkey.pem;

    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;
    ssl_session_tickets off;
    ssl_buffer_size 4k;

    ssl_trusted_certificate /etc/letsencrypt/live/grapheneos.org/chain.pem;
    ssl_stapling on;
    ssl_stapling_verify on;
    # maintained by certbot-ocsp-fetcher
    ssl_stapling_file /etc/nginx/ocsp-cache/grapheneos.org.der;

    access_log /var/log/nginx/access.log combined buffer=64k flush=1m;
    error_log /var/log/nginx/error.log;

    gzip_proxied any;
    gzip_vary on;

    if_modified_since before;

    map $http_cookie $preload_resources {
        "~*__Host-preload=1" "";
        default "</grapheneos.css?29>; rel=preload; as=style, </fonts/roboto_latin.woff2?20>; rel=preload; as=font; crossorigin, </fonts/roboto_bold_latin.woff2?20>; rel=preload; as=font; crossorigin, </mask-icon.svg>; rel=preload; as=image";
    }

    server {
        listen 80 backlog=4096;
        listen [::]:80 backlog=4096;
        server_name grapheneos.org www.grapheneos.org grapheneos.app www.grapheneos.app grapheneos.com www.grapheneos.com grapheneos.info www.grapheneos.info grapheneos.page www.grapheneos.page vanadium.app www.vanadium.app;

        root /var/empty;

        return 301 https://$host$request_uri;
    }

    server {
        listen 443 ssl http2 backlog=4096;
        listen [::]:443 ssl http2 backlog=4096;
        server_name www.grapheneos.org grapheneos.app www.grapheneos.app grapheneos.com www.grapheneos.com grapheneos.info www.grapheneos.info grapheneos.page www.grapheneos.page;

        root /var/empty;

        include snippets/security-headers.conf;

        return 301 https://grapheneos.org$request_uri;
    }

    server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name vanadium.app www.vanadium.app;

        root /var/empty;

        include snippets/security-headers.conf;

        return 302 https://github.com/GrapheneOS/Vanadium;
    }

    server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name grapheneos.org;

        root /var/www/html;
        error_page 403 =404 /404.html;
        error_page 404 /404.html;

        include snippets/security-headers.conf;
        gzip_static on;
        brotli_static on;

        if ($request_uri ~ ^/(.*)\.html$) {
            return 301 /$1;
        }

        if ($request_uri ~ (.*)//(.*)) {
            return 301 $1/$2;
        }

        if ($request_uri ~ ^(.*)/index$) {
            return 301 $1/;
        }

        # https://www.twipu.com/GrapheneOS doesn't handle links with fragments properly
        if ($request_uri ~ "^/(.*)<a href=$") {
            return 301 https://grapheneos.org/$1;
        }

        location = /security.txt {
            return 301 /.well-known/security.txt;
        }

        location = /graphene.png {
            return 301 /logo.png;
        }

        location = /pdfviewer_privacy_policy {
            return 301 /pdfviewer-privacy-policy;
        }

        location = /safari_pinned_tab_icon.svg {
            return 301 /mask-icon.svg;
        }

        location = /safari-pinned-tab-icon.svg {
            return 301 /mask-icon.svg;
        }

        location = /bitcoin_address.png {
            return 301 /bitcoin-donation.png;
        }

        location = /bitcoin-address.png {
            return 301 /bitcoin-donation.png;
        }

        # mangled backlinks to /install
        location = /installMinimal {
            return 301 /install;
        }

        location = /install {
            return 301 /install/cli;
        }

        location = /web-install {
            return 301 /install/web;
        }

        location = /install-web {
            return 301 /install/web;
        }

        location = /cli/install {
            return 301 /install/cli;
        }

        location = /web/install {
            return 301 /install/web;
        }

        location = /LICENSE {
            return 301 /LICENSE.txt;
        }

        location = /mstile-150x150.png {
            return 301 /mstile/150x150.png;
        }

        location = /mstile-310x310.png {
            return 301 /mstile/310x310.png;
        }

        location = /mstile-70x70.png {
            return 301 /mstile/70x70.png;
        }

        location = /mstile-310x150.png {
            return 301 /mstile/310x150.png;
        }

        location = /generate_204 {
            return 301 /faq#default-connections;
        }

        location = /404 {
            internal;
            include snippets/security-headers.conf;
            include snippets/preload.conf;
        }

        location = /404.html {
            internal;
            include snippets/security-headers.conf;
            include snippets/preload.conf;
        }

        # broken link (now fixed) on https://noagendaphone.com/ with UTF-8 replacement character
        location ~ "^/\xEF\xBF\xBC$" {
            return 301 /;
        }

        location ~ "\.(ico|webmanifest)$" {
            include snippets/security-headers.conf;
            add_header Cache-Control "public, max-age=604800";
        }

        location ~ "\.(css|js|mjs|svg)$" {
            include snippets/security-headers.conf;
            add_header Cache-Control "public, max-age=31536000";
        }

        location ~ "\.(png|woff2)$" {
            include snippets/security-headers.conf;
            add_header Cache-Control "public, max-age=31536000";
            gzip_static off;
            brotli_static off;
        }

        location ~ "\.(atom|json|pdf|txt|xml)$" {
            include snippets/security-headers.conf;
            add_header Cache-Control "public, max-age=1800";
        }

        location ~ "\.(br|gz)$" {
            internal;
        }

        location = /install/web {
            include snippets/security-headers-base.conf;
            add_header Content-Security-Policy "default-src 'none'; connect-src 'self' https://releases.grapheneos.org/; font-src 'self'; img-src 'self'; manifest-src 'self'; script-src 'self'; style-src 'self'; form-action 'none'; frame-ancestors 'none'; block-all-mixed-content; base-uri 'none'" always;
            add_header Permissions-Policy "accelerometer=(), ambient-light-sensor=(), autoplay=(), battery=(), camera=(), display-capture=(), document-domain=(), encrypted-media=(), fullscreen=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), midi=(), payment=(), picture-in-picture=(), publickey-credentials-get=(), screen-wake-lock=(), sync-xhr=(), xr-spatial-tracking=()" always;
            add_header Cache-Control "public, max-age=1800";
            include snippets/preload.conf;
            try_files $uri.html =404;
        }

        location / {
            include snippets/security-headers.conf;
            add_header Cache-Control "public, max-age=1800";
            include snippets/preload.conf;
            try_files $uri $uri.html $uri/ =404;
        }
    }

    server {
        listen 80;
        listen [::]:80;
        server_name mta-sts.grapheneos.org mta-sts.mail.grapheneos.org mta-sts.grapheneos.app mta-sts.grapheneos.com mta-sts.grapheneos.info mta-sts.grapheneos.page mta-sts.vanadium.app;

        root /var/empty;

        return 301 https://$host$request_uri;
    }

    server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name mta-sts.grapheneos.org mta-sts.mail.grapheneos.org mta-sts.grapheneos.app mta-sts.grapheneos.com mta-sts.grapheneos.info mta-sts.grapheneos.page mta-sts.vanadium.app;

        root /var/www/mta-sts;

        include snippets/security-headers.conf;
    }

    server {
        listen 127.0.0.1:81;
        listen [::1]:81;

        location /nginx_status {
            stub_status;
            access_log off;
        }
    }
}