#!/usr/bin/env python3 import sys sys.stdout.write( 'status: 200\r\n' 'Content-Type: text/html\r\n' 'Refresh: 0;URL=javascript:window.top.location="about:blank"\r\n\r\n' '\n' '\n' '\n' 'PASS: This is the content that appears in place of a refresh.\n' '\n' )