Caddyfile

{
  admin off
}

{$SEARXNG_HOSTNAME} {
  log {
        output discard
  }

  tls {$SEARXNG_TLS}

  @api {
        path /config
        path /healthz
        path /stats/errors
        path /stats/checker
  }

  @static {
        path /static/*
  }

  @notstatic {
        not path /static/*
  }

  @imageproxy {
        path /image_proxy
  }

  @notimageproxy {
        not path /image_proxy
  }

  header {
        # Enable HTTP Strict Transport Security (HSTS) to force clients to always connect via HTTPS
        Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"

        # Enable cross-site filter (XSS) and tell browser to block detected attacks
        X-XSS-Protection "1; mode=block"

        # Prevent some browsers from MIME-sniffing a response away from the declared Content-Type
        X-Content-Type-Options "nosniff"

        # Disable some features
        Permissions-Policy "accelerometer=(),ambient-light-sensor=(),autoplay=(),camera=(),encrypted-media=(),focus-without-user-activation=(),geolocation=(),gyroscope=(),magnetometer=(),microphone=(),midi=(),payment=(),picture-in-picture=(),speaker=(),sync-xhr=(),usb=(),vr=()"

        # Disable some features (legacy)
        Feature-Policy "accelerometer 'none';ambient-light-sensor 'none'; autoplay 'none';camera 'none';encrypted-media 'none';focus-without-user-activation 'none'; geolocation 'none';gyroscope 'none';magnetometer 'none';microphone 'none';midi 'none';payment 'none';picture-in-picture 'none'; speaker 'none';sync-xhr 'none';usb 'none';vr 'none'"

        # Referer
        Referrer-Policy "no-referrer"

        # X-Robots-Tag
        X-Robots-Tag "noindex, noarchive, nofollow"

        # Remove Server header
        -Server
  }

  header @api {
        Access-Control-Allow-Methods "GET, OPTIONS"
        Access-Control-Allow-Origin  "*"
  }

  # Cache
  header @static {
        # Cache
        Cache-Control "public, max-age=31536000"
        defer
  }

  header @notstatic {
        # No Cache
        Cache-Control "no-cache, no-store"
        Pragma "no-cache"
  }

  # CSP (see http://content-security-policy.com/ )
  header @imageproxy {
        Content-Security-Policy "default-src 'none'; img-src 'self' data:"
  }

  header @notimageproxy {
        Content-Security-Policy "upgrade-insecure-requests; default-src 'none'; script-src 'self'; style-src 'self' 'unsafe-inline'; form-action 'self' https://github.com/searxng/searxng/issues/new; font-src 'self'; frame-ancestors 'self'; base-uri 'self'; connect-src 'self' https://overpass-api.de; img-src 'self' data: https://*.tile.openstreetmap.org; frame-src https://www.youtube-nocookie.com https://player.vimeo.com https://www.dailymotion.com https://www.deezer.com https://www.mixcloud.com https://w.soundcloud.com https://embed.spotify.com"
  }

  # SearXNG
  handle {
        encode zstd gzip

        reverse_proxy localhost:8080 {
               header_up X-Forwarded-Port {http.request.port}
               header_up X-Forwarded-Proto {http.request.scheme}
               header_up X-Real-IP {remote_host}
        }
  }

}