A Spring Boot overlay server for Twitch broadcasters and their channel admins. Broadcasters can authorize via Twitch OAuth and invite channel admins to manage images that float over a transparent canvas. Updates are pushed in real time over WebSockets so OBS browser sources stay in sync.

Running

Define the following required environment variables:

Variable	Description	Example Value
IMGFLOAT_ASSETS_PATH	Filesystem path to store uploaded assets	/var/imgfloat/assets
IMGFLOAT_PREVIEWS_PATH	Filesystem path to store generated image previews	/var/imgfloat/previews
IMGFLOAT_DB_PATH	Filesystem path to the SQLite database file	/var/imgfloat/imgfloat.db
IMGFLOAT_INITIAL_TWITCH_USERNAME_SYSADMIN	Twitch username of the initial sysadmin user	example_broadcaster
IMGFLOAT_GITHUB_OWNER	Github user or org which has the client repository	Kruhlmann
IMGFLOAT_GITHUB_REPO	Client repository name	imgfloat-j
SPRING_SERVLET_MULTIPART_MAX_FILE_SIZE	Maximum upload file size	10MB
SPRING_SERVLET_MULTIPART_MAX_REQUEST_SIZE	Maximum upload request size	10MB
IMGFLOAT_GITHUB_OWNER	GitHub owner used to build desktop download links	Kruhlmann
IMGFLOAT_GITHUB_REPO	GitHub repo used to build desktop download links	imgfloat-j
TWITCH_CLIENT_ID	Oauth2 client id	i1bjnh4whieht5kzn307nvu3rn5pqi
TWITCH_CLIENT_SECRET	Oauth2 client secret	vpkn8cp7ona65l121j6q78l9gkmed3

Optional:

Variable	Description	Example Value
TWITCH_REDIRECT_URI	Override default redirect URI	http://localhost:8080/login/oauth2/code/twitch

During development environment variables can be placed in the .env file at the project root to automatically load them. Be aware that these are only loaded when using the Makefile command make run.

If you want to use the default development setup your .env file should look like this:

TWITCH_CLIENT_ID=...
TWITCH_CLIENT_SECRET=...
IMGFLOAT_GITHUB_OWNER=...
IMGFLOAT_GITHUB_REPO=...
IMGFLOAT_INITIAL_TWITCH_USERNAME_SYSADMIN=...