Sometimes hostnames need to change. In the past we've run automatic redirector services that redirect from an old domain to a new one, carrying along the path so it is transparent to the end user. We've learned though that by doing this end users never realize something changed and then continue to depend on the old domain and the redirector to access stuff. Eventually we want to shut down these redirectors or let go of old domains.

This new redirector service presents a landing page instead of just redirecting. This way the end user is forced to acknowledge the url has changed and hopefully they'll update their bookmarks or links accordingly.

This service requires one environment variable, but supports a few more for additional content.

REQUIRED:

• NEW_HOST - The new hostname. The URL generated for the user will be formatted as https://{NEW_HOST}{REQUEST_URI}. The https is hard coded to prevent redirecting to an http url, so only provide the hostname.

OPTIONAL:

• ADDITIONAL_MESSAGE - By default if this is not provided, the landing page will have a message that says <em>{{.OldHost}}</em> has changed to <em>{{.NewHost}}</em>. Use ADDITIONAL_MESSAGE to override this message. ADDITIONAL_MESSAGE is considered HTML safe, so you can include HTML in this message and it will not be escaped.

• REDIRECT_END_DATE - A human readable date that you intend to stop this redirector service. This is intended to instill a sense of inevitability so that end users do not perpetually depend on this redirector service.

• MORE_INFO_URL - If this URL is provided, a message is added to the page that says <p>Learn more about this change at: <a target="_blank" href="{{.MoreInfoURL}}">{{.MoreInfoURL}}</a></p>

• SKIP_LANDING_PAGE - If set to true users will be automatically redirected without seeing the landing page

Just run docker-compose up -d. Feel free to edit environment variables in the docker-compose.yml file first if you like.

MIT License

Copyright (c) 2020 SIL International

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.