Python网络编程详解(常用库、代码案例、环境搭建等)

import socket

def start_server():
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.bind(('127.0.0.1', 12345))
    server_socket.listen(5)
    print("Server listening on port 12345...")

    while True:
        client_socket, addr = server_socket.accept()
        print(f"Connection from {addr}")
        client_socket.send(b"Hello, client!")
        client_socket.close()

if __name__ == "__main__":
    start_server()

import socket

def start_client():
    client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client_socket.connect(('127.0.0.1', 12345))
    data = client_socket.recv(1024)
    print(f"Received: {data.decode()}")
    client_socket.close()

if __name__ == "__main__":
    start_client()

import asyncio

async def handle_client(reader, writer):
    data = await reader.read(100)
    message = data.decode()
    addr = writer.get_extra_info('peername')
    print(f"Received {message} from {addr}")

    writer.write(b"Hello, client!")
    await writer.drain()
    writer.close()

async def start_server():
    server = await asyncio.start_server(handle_client, '127.0.0.1', 12345)
    addr = server.sockets[0].getsockname()
    print(f"Serving on {addr}")

    async with server:
        await server.serve_forever()

if __name__ == "__main__":
    asyncio.run(start_server())

import asyncio

async def start_client():
    reader, writer = await asyncio.open_connection('127.0.0.1', 12345)
    writer.write(b"Hello, server!")
    await writer.drain()

    data = await reader.read(100)
    print(f"Received: {data.decode()}")

    writer.close()
    await writer.wait_closed()

if __name__ == "__main__":
    asyncio.run(start_client())

import requests

def send_http_request():
    response = requests.get('https://www.example.com')
    print(f"Status Code: {response.status_code}")
    print(f"Response Body: {response.text}")

if __name__ == "__main__":
    send_http_request()

import asyncio
import websockets

async def handle_connection(websocket, path):
    async for message in websocket:
        print(f"Received: {message}")
        await websocket.send(f"Echo: {message}")

async def start_server():
    async with websockets.serve(handle_connection, "localhost", 8765):
        await asyncio.Future()  # run forever

if __name__ == "__main__":
    asyncio.run(start_server())

import asyncio
import websockets

async def start_client():
    async with websockets.connect("ws://localhost:8765") as websocket:
        await websocket.send("Hello, server!")
        response = await websocket.recv()
        print(f"Received: {response}")

if __name__ == "__main__":
    asyncio.run(start_client())