What is it?

There are plenty of freemium applications letting you draw in a web canvas and save your masterpieces. It is much harder to come by a working free software self-hosted version which does not pull heaps of NodeJS brokenness. Fortunately, very nice folks have written a beautiful client-side drawing canvas widget named literallycanvas:

https://github.com/literallycanvas/literallycanvas

The only missing part was a small backend to save the drawings and expose them. Here comes gribouillis (French for scrawl).

Setup

From a working Go environment:

go get github.com/pmezard/gribouillis

Then in your server appdir/ directory, copy the literallycanvas/ subdirectory and the Go binary.

cd appdir
./gribouillis -http :5000

And voilà, here it is on port 5000. See --help for more options.

Bindings

SPACE key is bound to undo. I found it convenient to either draw with one hand and undo with the other, or bind it to drawing tablets command keys.