demo serial console

client.py

# demo os serial-console
#
# deps:
#  easy_install ws4py
#
# nova.conf:
#  [serial_console]
#  enabled = true
# 
# nova boot --image cirros --flavor 1 i1
# nova get-serial-console i1
# python client.py ws://127.0.0.1:6083/?token=5ed671c...

import sys
from ws4py.client.threadedclient import WebSocketClient

class LazyClient(WebSocketClient):
    def run(self):
        try:
            while not self.terminated:
                try:
                    b = self.sock.recv(4096)
                    sys.stdout.write(b)
                    sys.stdout.flush()
                except: # socket error expected
                    pass
        finally:
            self.terminate()

if __name__ == '__main__':
    if len(sys.argv) != 2 or not sys.argv[1].startswith("ws"):
        print "Usage %s: Please use websocket url"
        print "Example: ws://127.0.0.1:6083/?token=xxx"
        exit(1)
    try:
        ws = LazyClient(sys.argv[1], protocols=['binary'])
        ws.connect()
        while True:
            # keyboard event...
            c = sys.stdin.read(1)
            if c:
                ws.send(c)
        ws.run_forever()
        
    except KeyboardInterrupt:
        ws.close()