nixos-config/machines/renge/services/element-web.nix

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{ lib, pkgs, ... }:
let
# This uses
# https://github.com/vector-im/element-web#configuration-best-practices
# but allows to disable the frame-ancestors rule for /usercontent/.
mkSecurityHeaders = withFrameOptions: ''
add_header X-Content-Type-Options nosniff;
add_header X-Frame-Options SAMEORIGIN;
add_header X-XSS-Protection "1; mode=block";
'' + lib.optionalString withFrameOptions ''
add_header Content-Security-Policy "frame-ancestors 'none'";
'' + lib.optionalString (!withFrameOptions) ''
add_header Content-Security-Policy "frame-ancestors 'self'";
'';
in
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{
services.nginx.virtualHosts."chat.sbruder.de" = {
enableACME = true;
forceSSL = true;
root = pkgs.element-web;
extraConfig = mkSecurityHeaders true;
locations."/usercontent/".extraConfig = mkSecurityHeaders false;
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# nixpkgss override mechanism doesnt allow overriding of all options
locations."=/config.chat.sbruder.de.json".alias = pkgs.writeText "config.chat.sbruder.de.json" (lib.generators.toJSON { } {
default_server_config = {
"m.homeserver" = {
base_url = "https://matrix.sbruder.de";
server_name = "matrix.sbruder.de";
};
};
show_labs_settings = true;
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branding = {
auth_footer_links = [ ];
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};
piwik = false;
default_country_code = "DE";
setting_defaults = {
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"UIFeature.feedback" = false;
"UIFeature.shareSocial" = false;
"UIFeature.identityServer" = false;
"UIFeature.thirdPartyId" = false;
};
disable_custom_urls = true;
disable_guests = true;
disable_3pid_login = true;
desktop_builds.available = false;
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});
};
}