# Replace every chat.example.com with your actual domain before installing.
# Install only after the certificate and .baiyue-preview.htpasswd exist.
server {
    listen 80;
    listen [::]:80;
    server_name chat.example.com;

    location ^~ /.well-known/acme-challenge/ {
        root /var/www/letsencrypt;
        try_files $uri =404;
    }

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

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name chat.example.com;

    ssl_certificate /etc/letsencrypt/live/chat.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/chat.example.com/privkey.pem;
    ssl_protocols TLSv1.2 TLSv1.3;

    # Guard all pages, API routes, attachments and history/export operations.
    auth_basic "Baiyue private acceptance";
    auth_basic_user_file /etc/nginx/.baiyue-preview.htpasswd;

    # Allow multipart overhead around the application's 10 MiB file limit.
    client_max_body_size 12m;

    location / {
        proxy_pass http://127.0.0.1:5000;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Authorization "";

        # SSE must reach the browser as chunks arrive.
        proxy_buffering off;
        proxy_cache off;
        gzip off;
        proxy_read_timeout 300s;
        proxy_send_timeout 300s;
    }
}