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.