GAH! time.sleep(1)

dwolla.py

def process_dwolla_transaction_status_callback(request):
    if request.method == 'POST':
        data = simplejson.loads(request.body)
        logger.info('Dwolla transaction status callback triggered with '
                    'data: %s' % data)
        if check_dwolla_signature(
                request.META['HTTP_X_DWOLLA_SIGNATURE'],
                request.body):
            # Statuses can be found at:
            # https://developers.dwolla.com/dev/pages/statuses
            if data['Value'].lower() == 'pending':
                # Wait, because Dwolla issues this faster than they issue
                # their application callback. If we don't wait for a second
                # here, we'll have no ID to lookup, and we'll get a
                # DoesNotExist exception. Maddening.
                time.sleep(1)
            d = get_object_or_404(Donation, transaction_id=data['Id'])

            if data['Value'].lower() == 'processed':
                d.clearing_date = parser.parse(data['Triggered'])
                d.status = 4
            elif data['Value'].lower() == 'pending':
                d.clearing_date = parser.parse(data['Triggered'])
                d.status = 5
            elif data['Value'].lower() == 'cancelled':
                d.status = 3
            elif data['Value'].lower() == 'failed':
                d.status = 6
            elif data['Value'].lower() == 'reclaimed':
                d.status = 7
            d.save()
            return HttpResponse('<h1>200: OK</h1>')
        else:
            logger.warn('Dwolla signature check failed.')
            return HttpResponseForbidden(
                '<h1>403: Did not pass signature check.</h1>'
            )
    else:
        return HttpResponseNotAllowed(
            permitted_methods={'POST'},
            content='<h1>405: This is a callback endpoint for a payment '
                    'provider. Only POST methods are allowed.</h1>'
        )