excalidraw-storage-backend

This is a reimplementation of excalidraw-json suitable for self hosting you own instance of Excalidraw.

Feature:

Storing scenes: when you export as a link
Storing rooms: when you create a live collaboration
Storing images: when you export or do a live collaboration of a scene with images

It use Keyv as a simple K/V store so you can use the database of your choice.

Environement Variables

Name	Description	Default value
`PORT`	Server listening port	8080
`GLOBAL_PREFIX`	API global prefix for every routes	`/api/v2`
`STORAGE_URI`	Keyv connection string, example: `redis://user:pass@localhost:6379`. Availabe Keyv storage adapter: redis, mongo, postgres and mysql	`""` (in memory non-persistent)
`STORAGE_TTL`	Time to live for data	null
`LOG_LEVEL`	Log level (`debug`, `verbose`, `log`, `warn`, `error`)	`warn`
`BODY_LIMIT`	Payload size limit for scenes or images	`50mb`
`ENABLE_POSTGRES_TTL_SERVICE`	Enabling the Postgres TTL Service will clean up expired items once a day. This will break if used with a non-postgres `STORAGE_URI`.	`false`

For setting postgres pool variables, a few code adjustment have to be made in the storage.service.ts:

const store = new (require('@keyv/postgres'))({
  uri,
  max: 1,
});

const keyv = new Keyv({
  store,
  ttl,
});