Using node-imagemagick to 'crop' an image uploaded to S3

Question

I'm building functionality that allows users to upload an image, then crop it to a square (for profile pictures etc...)

Currently, the process works like this:

• User selects image from hd
• Image is uploaded to S3
• S3 Path is sent back to view, and image with jCrop is shown
• On submit button being clicked, my controller action gets the coords set above

Now I'd like to crop this image to the given coords (note- I'm using lpatters fork of node-imagemagick as it contains 'offset'

Unfortunately, .crop only accepts a path - which we don't have, since it's hosted on S3 at this point.

Is there any workaround?

I saw tmp, but this may be a little overkill?

Answer 1

What about using some of the other entry points such as "resize" that then allow you to provide the custom arguments? I'm using streams in this code: https://github.com/jeffwilcox/4th-cloud/blob/master/lib/webserver.js#L542