The storage middleware provide a way to avoid long transaction in your application.
POST content is written to a temporary directory. If the POST contains some files then the files are moved to the storage directory. The files content is replaced by the path of the real file relative to the storage root.
This way, your application receive always a few Ko of data.
Wrap your wsgi application with the middleware:
>>> from gp.fileupload import Storage
>>> from gp.fileupload import purge_files
>>> import cgi
>>> def my_application(environ, start_response):
... """simple app to read the file path from the request and remove it
... from the storage directory
... """
... if environ['REQUEST_METHOD'] == 'POST':
... fields = cgi.FieldStorage(fp=environ['wsgi.input'],
... environ=environ,
... keep_blank_values=1)
... relative_path = fields['file'].read()
... # remove file from storage
... purge_files(environ, relative_path)
... start_response('200 OK', [('Content-Type', 'txt/html')])
... return ['<html><body>My app</body></html>']
>>> app = Storage(my_application,
... upload_to='/tmp/share/files',
... tempdir='/tmp/upload_tmp',
... )
>>> def application(environ, start_response):
... return app(environ, start_response)
The Storage middleware has the following options: