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element-web/docs/config.md

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Configuration

You can configure the app by copying config.sample.json to config.json and customising it:

For a good example, see https://riot.im/develop/config.json.

  1. default_server_config sets the default homeserver and identity server URL for Riot to use. The object is the same as returned by https://<server_name>/.well-known/matrix/client, with added support for a server_name under the m.homeserver section to display a custom homeserver name. Alternatively, the config can contain a default_server_name instead which is where Riot will go to get that same object, although this option is deprecated - see the .well-known link above for more information on using this option. Note that the default_server_name is used to get a complete server configuration whereas the server_name in the default_server_config is for display purposes only.
    • Note: The URLs can also be individually specified as default_hs_url and default_is_url, however these are deprecated. They are maintained for backwards compatibility with older configurations. default_is_url is respected only if default_hs_url is used.
    • Riot will fail to load if a mix of default_server_config, default_server_name, or default_hs_url is specified. When multiple sources are specified, it is unclear which should take priority and therefore the application cannot continue.
    • As of Riot 1.4.0, identity servers are optional. See Identity servers below.
  2. features: Lookup of optional features that may be enabled, disabled, or exposed to the user in the labs section of settings. The available optional experimental features vary from release to release and are (usually) documented. The feature flag process is documented as well.
  3. showLabsSettings: Shows the "labs" tab of user settings even when no features are enabled or present. Useful for getting at settings which may be otherwise hidden.
  4. brand: String to pass to your homeserver when configuring email notifications, to let the homeserver know what email template to use when talking to you.
  5. branding: Configures various branding and logo details, such as:
    1. welcomeBackgroundUrl: An image to use as a wallpaper outside the app during authentication flows
    2. authHeaderLogoUrl: An logo image that is shown in the header during authentication flows
    3. authFooterLinks: a list of links to show in the authentication page footer: [{"text": "Link text", "url": "https://link.target"}, {"text": "Other link", ...}]
  6. integrations_ui_url: URL to the web interface for the integrations server. The integrations server is not Riot and normally not your homeserver either. The integration server settings may be left blank to disable integrations.
  7. integrations_rest_url: URL to the REST interface for the integrations server.
  8. integrations_widgets_urls: list of URLs to the REST interface for the widget integrations server.
  9. bug_report_endpoint_url: endpoint to send bug reports to (must be running a https://github.com/matrix-org/rageshake server). Bug reports are sent when a user clicks "Send Logs" within the application. Bug reports can be disabled by leaving the bug_report_endpoint_url out of your config file.
  10. roomDirectory: config for the public room directory. This section is optional.
  11. roomDirectory.servers: List of other homeservers' directories to include in the drop down list. Optional.
  12. default_theme: name of theme to use by default (e.g. 'light')
  13. update_base_url (electron app only): HTTPS URL to a web server to download updates from. This should be the path to the directory containing macos and win32 (for update packages, not installer packages).
  14. cross_origin_renderer_url: URL to a static HTML page hosting code to help display encrypted file attachments. This MUST be hosted on a completely separate domain to anything else since it is used to isolate the privileges of file attachments to this domain. Default: https://usercontent.riot.im/v1.html. This needs to contain v1.html from https://github.com/matrix-org/usercontent/blob/master/v1.html
  15. piwik: Analytics can be disabled by setting piwik: false or by leaving the piwik config option out of your config file. If you want to enable analytics, set piwik to be an object containing the following properties:
    1. url: The URL of the Piwik instance to use for collecting analytics
    2. whitelistedHSUrls: a list of HS URLs to not redact from the analytics
    3. whitelistedISUrls: a list of IS URLs to not redact from the analytics
    4. siteId: The Piwik Site ID to use when sending analytics to the Piwik server configured above
  16. welcomeUserId: the user ID of a bot to invite whenever users register that can give them a tour
  17. embeddedPages: Configures the pages displayed in portions of Riot that embed static files, such as:
    1. welcomeUrl: Initial content shown on the outside of the app when not logged in. Defaults to welcome.html supplied with Riot.
    2. homeUrl: Content shown on the inside of the app when a specific room is not selected. By default, no home page is configured. If one is set, a button to access it will be shown in the top left menu.
  18. defaultCountryCode: The ISO 3166 alpha2 country code to use when showing country selectors, like the phone number input on the registration page. Defaults to GB if the given code is unknown or not provided.
  19. settingDefaults: Defaults for settings that support the config level, as an object mapping setting name to value (note that the "theme" setting is special cased to the default_theme in the config file).
  20. disable_custom_urls: disallow the user to change the default homeserver when signing up or logging in.
  21. permalinkPrefix: Used to change the URL that Riot generates permalinks with. By default, this is "https://matrix.to" to generate matrix.to (spec) permalinks. Set this to your Riot instance URL if you run an unfederated server (eg: "https://riot.example.org").

Note that index.html also has an og:image meta tag that is set to an image hosted on riot.im. This is the image used if links to your copy of Riot appear in some websites like Facebook, and indeed Riot itself. This has to be static in the HTML and an absolute URL (and HTTP rather than HTTPS), so it's not possible for this to be an option in config.json. If you'd like to change it, you can build Riot, but run RIOT_OG_IMAGE_URL="http://example.com/logo.png" yarn build. Alternatively, you can edit the og:image meta tag in index.html directly each time you download a new version of Riot.

Identity servers

The identity server is used for inviting other users to a room via third party identifiers like emails and phone numbers. It is not used to store your password or account information.

As of Riot 1.4.0, all identity server functions are optional and you are prompted to agree to terms before data is sent to the identity server.

Riot will check multiple sources when looking for an identity server to use in the following order of preference:

  1. The identity server set in the user's account data
    • For a new user, no value is present in their account data. It is only set if the user visits Settings and manually changes their identity server.
  2. The identity server provided by the .well-known lookup that occurred at login
  3. The identity server provided by the Riot config file

If none of these sources have an identity server set, then Riot will prompt the user to set an identity server first when attempting to use features that require one.

Currently the only two public identity servers are https://vector.im and https://matrix.org, however in the future identity servers will be decentralised.

Desktop app configuration

To run multiple instances of the desktop app for different accounts, you can launch the executable with the --profile argument followed by a unique identifier, e.g riot-web --profile Work for it to run a separate profile and not interfere with the default one.

Alternatively, a custom location for the profile data can be specified using the --profile-dir flag followed by the desired path.

  • %APPDATA%\$NAME\config.json on Windows
  • $XDG_CONFIG_HOME\$NAME\config.json or ~/.config/$NAME/config.json on Linux
  • ~Library/Application Support/$NAME/config.json on macOS

In the paths above, $NAME is typically Riot, unless you use --profile $PROFILE in which case it becomes Riot-$PROFILE.