Q:

App Engine Blobstore - What can I do to limit the size of a file that a user can upload?

What can I do to limit the size of a file that can be uploaded?  I know I can limit it client side with SWFUpload, but how can I limit it server side?  
How do I protect against someone uploading a 1GB file and eating up my quota? 

A:

App Engine 1.5.4 SDK introduced an option to specify a limit on your blob upload size.
See maxUploadSizeBytes and maxUploadSizeBytesPerBlob of the UploadOptions class.

