Created
May 13, 2016 15:39
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UDP client server application
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| import argparse | |
| import socket | |
| from datetime import datetime | |
| maxbyte=65535 | |
| def server(port): | |
| sock=socket.socket(socket.AF_INET,socket.SOCK_DGRAM) | |
| sock.bind(('127.0.0.1',port)) | |
| print('Listining at {}'.format(sock.getsockname())) | |
| while True: | |
| data,address=sock.recvfrom(maxbyte) | |
| text=data.decode('ascii') | |
| print('the client at {} says {}'.format(address,text)) | |
| data=text.encode('ascii') | |
| sock.sendto(data,address) | |
| def client(port): | |
| sock=socket.socket(socket.AF_INET,socket.SOCK_DGRAM) | |
| text='the time is {}'.format(datetime.now()) | |
| data=text.encode('ascii') | |
| sock.sendto(data,('127.0.0.1',port)) | |
| print('Client is assigned to the address {}'.format(sock.getsockname())) | |
| data,address=sock.recvfrom(maxbyte) | |
| text=data.decode('ascii') | |
| print('the server {} replied {}'.format(address,text)) | |
| def main(): | |
| choices={'client':client,'server':server} | |
| parser=argparse.ArgumentParser(description='udp communication example') | |
| parser.add_argument('role',choices=choices,help='which role to play') | |
| parser.add_argument('-p',metavar='PORT',type=int,default=1060,help='UDP port(default 1060)') | |
| args=parser.parse_args() | |
| function=choices[args.role] | |
| function(args.p) | |
| main() |
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