Ticket #4604: __init__.py

class FlashMiddleware:
        def process_response(self, request, response):
                try:
                        request.session['flash'] = request.flash
                except:
                        pass
                return response

def flash(request):
        if 'flash' in request.session:
                flash = request.session['flash']
                del request.session['flash']
                return {'flash': flash}
        return {'flash': None}