Carbonara

API for carbon.

Getting started

Send POST https://carbonara.vercel.app/api/cook to take an image of code snippet.

How it works

Puppeteer visit https://carbon.now.sh.
Mapping all params in properly URL params.
Taking a screenshot of the editor.

POST `/api/cook`

Body is JSON with next params:

parameter	default	type	description
`code` (required)		string	Code snippet
`backgroundColor`	`"rgba(171, 184, 195, 1)"`	string	Hex or rgba color
`dropShadow`	`true`	boolean	Turn on/off shadow
`dropShadowBlurRadius`	`"68px"`	string	shadow blur radius
`dropShadowOffsetY`	`"20px"`	string	shadow offset y
`exportSize`	`"2x"`	string	resolution of exported image, e.g. `1x`, `3x`
`fontSize`	`"14px"`	string	font size
`fontFamily`	`"Hack"`	string	font family, e.g. `JetBrains Mono`, `Fira Code`.
`firstLineNumber`	`1`	number	first line number
`language`	`"auto"`	string	programing language for properly highlighting. See name in carbon exported config. For example bash is named `"application/x-sh"`
`lineHeight`	`"133%"`	string	line height
`lineNumbers`	`false`	boolean	turn on/off line number
`paddingHorizontal`	`"56px"`	string	horizontal padding
`paddingVertical`	`"56px"`	string	vertical padding
`theme`	`"seti"`	string	code theme
`watermark`	`false`	boolean	turn on/off watermark
`widthAdjustment`	`true`	boolean	turn on/off width adjustment
`windowControls`	`true`	boolean	turn on/off window controls
`windowTheme`	`"none"`	string	window theme

Defaults params are the same as https://carbon.now.sh.

Response is an image of a code snippet.

Example

Creating image and saving to code.png in terminal.

curl -L https://carbonara.vercel.app/api/cook \
-X POST \
-H 'Content-Type: application/json' \
-d '{
      "code": "export default const sum = (a, b) => a + b",
      "backgroundColor": "#1F816D"
    }' \
> code.png

Easy way to tune image

Visit https://carbon.now.sh.
Set appearance.
Click gear → misc → export config for downloading JSON with the current setting.
Add code property in JSON.
Use JSON in /api/cook request body.

Unsupported params

These options exist in exported config but there is not a possibility pass them via URL: backgroundImage, backgroundImageSelection, backgroundMode, squaredImage, hiddenCharacters, name, loading, icon, isVisible, width.

Docker container

Running the server in 3000 port with docker:

docker run -p 3000:3000 -it --cap-add=SYS_ADMIN petersolopov/carbonara

Running test

docker build -t local/carbonara .
docker run -it --rm --cap-add=SYS_ADMIN local/carbonara npm test

Development

There are two main files:

api/cook.js — lambda function that running in production.
src/index.js – nodejs server that running in docker container.

Running development server:

docker build -t local/carbonara .
docker run -v $(pwd):/home/pptruser/app/ -p 3000:3000 -it --rm --cap-add=SYS_ADMIN local/carbonara npm run nodemon

Updating test images:

docker build -t local/carbonara .
docker run -v $(pwd):/home/pptruser/app/ -it --rm --cap-add=SYS_ADMIN local/carbonara npm test

LICENSE

MIT.

ShootDot/carbonara