#   This file is included strictly as an example of how Nginx can be configured
#   to work with CryptPad. This example WILL NOT WORK AS IS. For best results,
#   compare the sections of this configuration file against a working CryptPad
#   installation (http server by the Nodejs process). If you are using CryptPad
#   in production, contact sales@cryptpad.fr

server {
    listen 443 ssl http2;

    # XXX These two variables 
    set $main_domain "your-main-domain.com";
    set $sandbox_domain "your-sandbox-domain.com";

    # The $api_domain and $files_domain are optional
    set $api_domain "api.your-main-domain.com";
    set $files_domain "files.your-main-domain.com";

    server_name $main_domain $sandbox_domain;

    ssl_certificate         /home/cryptpad/.acme.sh/your-main-domain.com/fullchain.cer;
    ssl_certificate_key     /home/cryptpad/.acme.sh/your-main-domain.com/your-main-domain.com.key;
    ssl_trusted_certificate /home/cryptpad/.acme.sh/your-main-domain.com/ca.cer;

    ssl_dhparam /etc/nginx/dhparam.pem;
    ssl_session_timeout 5m;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # omit SSLv3 because of POODLE
    # ECDHE better than DHE (faster)  ECDHE & DHE GCM better than CBC (attacks on AES)  Everything better than SHA1 (deprecated)
    ssl_ciphers 'ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA';
    ssl_prefer_server_ciphers on;

    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Content-Type-Options nosniff;
    # add_header X-Frame-Options "SAMEORIGIN";

    # Insert the path to your CryptPad repository root here
    root /home/cryptpad/cryptpad;
    index index.html;
    error_page 404 /customize.dist/404.html;

    if ($args ~ ver=) {
        set $cacheControl max-age=31536000;
    }
    # Will not set any header if it is emptystring
    add_header Cache-Control $cacheControl;

    set $styleSrc   "'unsafe-inline' 'self' ${main_domain}";
    set $scriptSrc  "'self' ${main_domain}";
    set $connectSrc "'self' https://${main_domain} wss://${main_domain} $main_domain https://${api_domain} blob:";
    set $fontSrc    "'self' data: ${main_domain}";
    set $imgSrc     "'self' data: * blob: ${main_domain}";
    set $frameSrc   "'self' ${sandbox_domain} blob:";
    set $mediaSrc   "'self' data: * blob: ${main_domain}";
    set $childSrc   "https://${main_domain}";
    set $workerSrc  "https://${main_domain}";

    set $unsafe 0;
    if ($uri = "/pad/inner.html") { set $unsafe 1; }
    if ($uri = "/sheet/inner.html") { set $unsafe 1; }
    if ($uri = "/common/onlyoffice/web-apps/apps/spreadsheeteditor/main/index.html") { set $unsafe 1; }
    if ($host != sandbox.cryptpad.info) { set $unsafe 0; }
    if ($unsafe) {
        set $scriptSrc "'self' 'unsafe-eval' 'unsafe-inline' ${main_domain}";
    }
    add_header Content-Security-Policy "default-src 'none'; child-src $childSrc; worker-src $workerSrc; media-src $mediaSrc; style-src $styleSrc; script-src $scriptSrc; connect-src $connectSrc; font-src $fontSrc; img-src $imgSrc; frame-src $frameSrc;";


    location ^~ /cryptpad_websocket {
        proxy_pass http://localhost:3000;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        # WebSocket support (nginx 1.4)
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection upgrade;
    }

    location ^~ /datastore/ {
        alias /home/cryptpad/office.cryptpad/data/datastore;
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' '*';
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
            add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
            add_header 'Access-Control-Max-Age' 0;
            add_header 'Content-Type' 'application/octet-stream; charset=utf-8';
            add_header 'Content-Length' 0;
            return 204;
        }
        add_header Cache-Control max-age=0;
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
        add_header 'Access-Control-Expose-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
        try_files $uri =404;
    }

    location ^~ /customize.dist/ {
        # This is needed in order to prevent infinite recursion between /customize/ and the root
    }
    location ^~ /customize/ {
        rewrite ^/customize/(.*)$ $1 break;
        try_files /customize/$uri /customize.dist/$uri;
    }

    location = /api/config {
        proxy_pass http://localhost:3000;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location ^~ /blob/ {
        add_header Cache-Control max-age=31536000;
        try_files $uri =404;
    }

    location ^~ /block/ {
        add_header Cache-Control max-age=0;
        try_files $uri =404;
    }

    location ^~ /datastore/ {
        add_header Cache-Control max-age=0;
        try_files $uri =404;
    }

    location ~ ^/(register|login|settings|user|pad|drive|poll|slide|code|whiteboard|file|media|profile|contacts|todo|filepicker|debug|kanban|sheet|support|admin|notifications|teams)$ {
        rewrite ^(.*)$ $1/ redirect;
    }

    try_files /www/$uri /www/$uri/index.html /customize/$uri;
}