'Call the gateway and write its iterable output.'

def respond(self):

    mrbs = self.server.max_request_body_size
    if self.chunked_read:
        self.rfile = ChunkedRFile(self.conn.rfile, mrbs)
    else:
        cl = int(self.inheaders.get('Content-Length', 0))
        if (mrbs and (mrbs < cl)):
            if (not self.sent_headers):
                self.simple_response('413    Request    Entity    Too    Large', 'The    entity    sent    with    the    request    exceeds    the    maximum    allowed    bytes.')
            return
        self.rfile = KnownLengthRFile(self.conn.rfile, cl)
    self.server.gateway(self).respond()
    if (self.ready and (not self.sent_headers)):
        self.sent_headers = True
        self.send_headers()
    if self.chunked_write:
        self.conn.wfile.write('0\r\n\r\n')
