UDP服务器和客户端示例

代码

udp_server.py

import socket
 
localIP     = "0.0.0.0"
localPort   = 8888
bufferSize  = 1024
 
msgFromServer       = "Hello UDP Client"
bytesToSend         = str.encode(msgFromServer)
 
# Create a datagram socket
UDPServerSocket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM)
 
# Bind to address and ip
UDPServerSocket.bind((localIP, localPort))
 
print("UDP server up and listening")
 
# Listen for incoming datagrams
while(True):
    bytesAddressPair = UDPServerSocket.recvfrom(bufferSize)
    message = bytesAddressPair[0]
    address = bytesAddressPair[1]
    clientMsg = "Message from Client:{}".format(message)
    clientIP  = "Client IP Address:{}".format(address)
    
    print(clientMsg)
    print(clientIP)
   
    # Sending a reply to client
    UDPServerSocket.sendto(bytesToSend, address)

udp_client.py

import socket
 
msgFromClient       = "Hello UDP Server"
bytesToSend         = str.encode(msgFromClient)
serverAddressPort   = ("1.2.3.4", 8888)
bufferSize          = 1024
 
# Create a UDP socket at client side
UDPClientSocket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM)
 
# Send to server using created UDP socket
UDPClientSocket.sendto(bytesToSend, serverAddressPort)
 
msgFromServer = UDPClientSocket.recvfrom(bufferSize)
 
msg = "Message from Server {}".format(msgFromServer[0])
print(msg)