Echarts SSR Service

Inspired by echarts5-canvas-ssr

Changes & Improvements

• Update echarts to version ^5.4.*. Support for some new features.

• Use skr canvas to instead of node-canvas.There is no need to install additional dependencies and the performance is excellent.

• Use cluster for efficiency.

• Support for two types of response,including image buffer and SVG string.

• Support parsing Using functions in echarts option.

Usage

docker build -t echarts-ssr-server:latest .

docker run --name echarts-ssr-server-instance -dp 10086:10086 -v echarts-fonts:/usr/share/fonts echarts-ssr-server:latest

Note: Install the package.json dependency inside docker.

Body of POST Request :

Parameter	Type	Description
type	'png'|'svg'	Response content type, if type is 'png', return Buffer.if type is 'svg', return a Base64-encoded svg string.Defaults to 'png'.
option	EchartCoreOption	Options of echarts
width	number | string	Width of the chart
height	number | string	Height of the chart

Custom Deployment

You can customize the ENV variables in Dockfile to change default configurations.

# The worker thread number.
# Make sure you do not exceed the total number of CPU cores in your machine.
# The best practice is half the total number of cpu cores.
ENV WORKER_PROCESSES=8

# Simple verification for the server.
ENV AUTHORIZATION="Bearer 123"

# The hostname of node server. Defaults to "0.0.0.0".
ENV HOST="0.0.0.0"

# The port of node server.Make sure the ports are consistent.Defaults to 7654.
ENV PORT=10086

# This value determines the resolution of the chart and defaults to window.devicePixelRatio in browsers.
ENV DEVICE_PIXEL_RATIO=1.5