dali

A node.js implementation of a server-side Highcharts rendering service.

Accepts Highcharts JSON configuration structures and responds with the corresponding SVG.

Features

• Accepts Highcharts JSON configuration structures
• Responds with SVG
• Caches chart objects, re-uses them for requests that only change the data
• Cleans up old chart objects and SVG
• Well behaved daemon
  • priv dropping (nobody)
  • init script (/etc/init.d/dali)
  • pidfile (/var/run/dali/dali.pid)
  • config file (/etc/dali.conf)
  • logs to syslog

Dependencies

All dependencies are available from npm:

• sprintf
• ain2
• commander
• daemon
• jsdom
• metricfire
• timezone-js

Configuration

As dali is a completely standalone service, there is very little to configure.

{
      "listen_addr": "127.0.0.1"
   ,  "listen_port": 3254
   ,  "metricfire_key": null
}

Example

First, start dali in debug mode:

$ NODE_PATH=lib node src/dali.js
dali started

Send the example response, example/request.json, to dali and capture the SVG output

$ curl -s http://localhost:3254 --data-binary @example/request.json > response.svg

response.svg should now contain an SVG rendering of the chart.

Using dali from Python

See example/example.py.

cd example
python example.py
[ large SVG output snipped ]

Building a .deb package

$ dpkg-buildpackage -tc

Don't forget to update the changelog in debian/changelog and make sure the version number matches the one in src/dali.js!

Building deb packages for dependencies

Use something like https://github.com/metricfire/deb-npm-autopackage to produce deb packages for all the dependency modules listed above.