My use case is that I would like to have a web app which allows users to load an Excel file, whose format I do not control, and have the user select a range of cells from that file to send to a web service. I would like to embed an Excel Web App in my web app for this purpose but in order to do this I need to programmatically embed an arbitrary workbook from SkyDrive that I don't know ahead of time. This means that I can't just use the manual Javascript Embed menu option in SkyDrive which provides the fileToken. Can I pull an Excel Web App fileToken from SkyDrive programmatically? Is this the right way to approach the problem?
Thanks,
Jason