def application(environ, start_response):
    status = '200 OK'
    html = b'<html><body><div style="width: 100%; font-size: 40px; font-weight: bold; text-align: center;">Welcome to mod_wsgi Test Page</div></body></html>'
    response_header = [('Content-type','text/html')]
    start_response(status,response_header)
    return [html]

