gevent port of this https://gist.github.com/barneygale/5051791

mcdowntime.py

#!/usr/bin/env python
"""
Networking stuff is cribbed from here
https://gist.github.com/barneygale/5051791

This is just a gevent ports

"""

import optparse
import struct
from gevent.server import StreamServer

p = optparse.OptionParser()
p.add_option('-a', '--addr', dest='addr', default='0.0.0.0')
p.add_option('-p', '--port', dest='port', default='25565')
p.add_option('-m', '--message', dest='motd', default='Down for maintenance')
(opt, args) = p.parse_args()

motd = opt.motd
proto_ver = '60'
mc_ver = '1.5.1'
msg = u'\x00'.join((
    u'\xa71',
    proto_ver,
    mc_ver,
    motd,
    u'99',
    u'99'
))


def handler(socket, addr):
    print 'Connection from {0}'.format(addr[0])
    incoming = socket.recv(1024)
    if incoming[0] == '\xfe':
        # Pinged from the server list
        message = msg
    else:
        # Somebody is trying to log on
        message = motd

    s = struct.pack('!h', len(message))
    socket.send('\xff' + s + message.encode('utf-16be'))
    socket.close()


def serve(ip_addr, port):
    print 'Serving on {0}:{1}'.format(ip_addr, port)
    server = StreamServer((ip_addr, port), handler)
    server.serve_forever()


if __name__ == '__main__':
    serve(opt.addr, int(opt.port))