SOCKET建立简单的tcp服务端与客户端通信

socket是什么

socket可以使两台机子建立连接，就像连接风扇与电源的插座一样，socket可以使服务端与客户端建立连接，服务端就像供电厂，而客户端就像用电器，而socket就是连接二者的插座。

建立简单的连接

如果我们想在客户端与服务端建立连接收发数据就需要分别执行socket方法。

服务端依次执行bind() linten() acctpt()

客户端执行connect()请求与服务端连接之后服务端与客户端都可以执行send() recv()发送与接收消息 python实现 server socket()bind()绑定ip和端口listen()监听accept()等待连接。返回新的socket对象（用于收发数据）与addr（存有客户端IP与PORT）send()/recv()close() import socket IP = '0.0.0.0' PORT = 50000 BUF_LEN = 512 listenSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) listenSocket.bind((IP, PORT)) listenSocket.listen(5) print('[*] Socket is listening..') data, addr = listenSocket.accept() print('[*] Got connection from', addr) while True: received_data = data.recv(BUF_LEN) if not received_data: break info = received_data.decode() print(f'[*] Received {info}') data.send(f'服务端收到消息{info}'.encode()) data.close() listenSocket.close() client socket()connect()申请连接send()/recv()close() import socket IP = '127.0.0.1' PORT = 50000 BUFFER_SIZE = 512 dataSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) dataSocket.connect((IP, PORT)) while True: toSend = input('Enter a message to send: ') if toSend == '': break dataSocket.send(toSend.encode()) receivedData = dataSocket.recv(BUFFER_SIZE) if not receivedData: break print(receivedData.decode()) dataSocket.close()