python实现的多线程字符转换成大写的tcp服务端代码

python实现的多线程字符转换成大写的tcp服务端代码，下面的代码用于将用户通过tcp发过来的字符串转换成大写后返回，如果客户端发送过来空字符串，则结束通信

import SocketServer
import netstring
import sys
import string

class MyRequestHandler(SocketServer.BaseRequestHandler):
    def handle(self):
        print "Connected:", self.client_address
        while 1:
            rq = netstring.readns(self.request)
            print "From:", self.client_address, rq
            sys.stdout.flush()
            if rq == "":
                break
            netstring.writens(self.request, string.upper(rq))

myServer = SocketServer.ThreadingTCPServer(('', 8081),
                MyRequestHandler)
myServer.serve_forever()