[web2py] Accept image upload from API or standalone form

[pbreit]

I'm trying to figure out how to accept an image upload from a form that was 
not generated by Web2py.

So for example:

<form method=post action=http://pb-dev.pricetack.com:8001/mobilepost>
<input name=title value=title>
<input name=price value=10.00>
<input type=file name=image>
<input type=submit value=Upload>
</form>

How do I process the image?