Python实现UDP与TCP通信的示例详解

import socket

UDP_IP = '127.0.0.1'   # 目标IP地址
UDP_PORT = 5005        # 目标端口号
MESSAGE = b"Hello, World!"   # 要发送的数据

# 创建UDP套接字
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# 发送数据
sock.sendto(MESSAGE, (UDP_IP, UDP_PORT))

# 关闭套接字
sock.close()

import socket

UDP_IP = '127.0.0.1'   # 监听IP地址
UDP_PORT = 5005        # 监听端口号

# 创建UDP套接字
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# 绑定套接字到指定IP地址和端口号
sock.bind((UDP_IP, UDP_PORT))

# 接收数据
data, addr = sock.recvfrom(1024)   # 一次最多接收1024字节的数据

print("Received message:", data)

# 关闭套接字
sock.close()

import socket

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
max_size = sock.getsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF)
print(f"Max size of UDP packet: {max_size} bytes")

import socket

# 设置IP地址和端口号
IP = '127.0.0.1'
PORT = 8888

# 创建TCP套接字
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# 绑定IP地址和端口号
sock.bind((IP, PORT))

# 开始监听
sock.listen(1)

print(f"Server listening on {IP}:{PORT}...")

# 接受客户端连接
conn, addr = sock.accept()
print(f"Connected by {addr[0]}:{addr[1]}")

# 接收数据
data = conn.recv(1024)
print(f"Received data: {data.decode()}")

# 发送数据
msg = b"Hello, Client!"
conn.sendall(msg)

# 关闭连接
conn.close()

import socket

# 设置IP地址和端口号
IP = '127.0.0.1'
PORT = 8888

# 创建TCP套接字
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# 连接服务器
sock.connect((IP, PORT))

# 发送数据
msg = b"Hello, Server!"
sock.sendall(msg)

# 接收数据
data = sock.recv(1024)
print(f"Received data: {data.decode()}")

# 关闭连接
sock.close()