Is it possible to save JavaScript generated images on the serverside?

I want to use JSChart (http://www.jscharts.com/) to generate a dynamic chart.

It uses a <canvas> object.

Furthermore I want to save the generated Chart as an image 开发者_运维百科(to put in a pdf file) on the serverside.

Is it possible to save a JavaScript generated image as jpg or png on the serverside?

Preferably the solution should work with Ruby and Ruby On Rails.

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I think this uses a <canvas> object to render the charts, can't tell without downloading and it requires registration, so no. If it does, perhaps take a look at Canvas2Image, that returns the canvas as a data URL, base64 encoded image, which could be sent back to the server via an AJAX call.

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You can use http://xmlgraphics.apache.org/batik/ on the server to convert an SVG. It's the method used by highcharts to convert the graph generated by the application. See http://www.highcharts.com/docs/export-module/setting-up-the-server