Over the past few days we've been fixing lots of stuff in prestans, as
part of this we've added FileUpload support. The FileUploadParser is
an exception to the rule, as described in our wiki article.
http://code.google.com/p/prestans/wiki/RequestParsers#Handling_File_Uploads
We are testing this under mod_wsgi today, and will finalise the API as
part of that. If you are using prestans under AppEngine there are some
limitations with file upload (described in wiki article as well).
For those interested in details about how to handle file uploads in
WSGI apps, here's a good article
http://www.wsgi.org/en/latest/specifications/handling_post_forms.html
This is currently available via the trunk on SVN, we will make another
alpha release shortly.
Hope this proves to be a useful feature for your apps.