Updated 17:15 EEST: added a diagram of the flow and updated chartServer.js
In a previous article I have shown how to use Excel to generate image charts with Microsoft Excel. In this article I will take this one step further and add a HTTP interface to that script so you can invoke it from a browser.
Installing and starting this server should take less than 2 minutes, with the biggest part of it being the download of node.js. The solution does not require any node.js modules other than the standard ones.
Using the service is even simpler:
http://giediprime:8000/chart?labels="High|Medium|Low"&data="2|25|8"&title="node.js chart example"