[Seaside] How to save a html5 canvas.toDataURL as a png file on the server

Bob N. bobn at rogers.com
Tue Jul 26 20:01:47 UTC 2011

(I also posted this in stack overflow)

I have an image that users can annotate on the browser. I can access the
image using
...I'd like to add a 'save' option for the user to save the image on the

This question has been answered for php...
    file_put_contents('test.png', base64_decode(substr($data, strpos($data,
...what I need is a Seaside callback with the PNG file contents.

Is there a way to do this in Seaside?

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