Python3服务端和客户端

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/csdnlinyongsheng/article/details/86620812

TCP服务端

from socket import *;
from time import ctime;

host = "localhost";#服务器地址
port = 8888;#端口

#创建Socket
tcpSocket = socket(AF_INET, SOCK_STREAM);

#绑定
tcpSocket.bind((host, port));

#设置最大连接数，超过后排队
tcpSocket.listen(5);

while True:
	#建立连接
	connect, addr = tcpSocket.accept();
	while True:
		#接收客户端发来的数据并且小于1024字节的数据
		data = connect.recv(1024);

		#如果客户端退出，则执行以下语句
		if not data:
			break;

		#转换
		data_result = str(data, "utf-8");
		print(data_result);

		recv_result = bytes(ctime(), "utf-8");
		#发送数据给客户端
		connect.sendall(recv_result);

	#关闭连接套接字
	connect.close();

#关闭套接字
tcpSocket.close();

TCP客户端

from socket import *;

host = "localhost";#服务器地址
port = 8888;#端口

#创建Socket
tcpSocket = socket(AF_INET, SOCK_STREAM);

#与服务端建立连接
tcpSocket.connect((host, port));

while True:
	send_info = input(">");

	#如果输入exit，则执行以下语句
	if send_info == "exit":
		break;

	#发送数据给服务端
	tcpSocket.sendall(bytes(send_info, "utf-8"));

	#接收服务端的数据 
	recv_info = tcpSocket.recv(1024);
	print("服务端返回的内容是：" + str(recv_info, "utf-8"));

#关闭套接字
tcpSocket.close();

================================================================================

UDP服务端

from socket import *;
from time import ctime;

host = "localhost";#服务器地址
port = 8888;#端口
bufsiz = 1024;#字节
add = (host, port);

# 创建socket
udpSocket = socket(AF_INET, SOCK_DGRAM);

# 绑定
udpSocket.bind(add);

while True:
	print("waiting for message...");

	#接收udp数据, 数据以字符串形式返回
	data, addr = udpSocket.recvfrom(bufsiz);

	#转换
	data_result = str(data, "utf-8");
	print(data);
	
	ret = bytes(ctime(), "utf-8");
	
	#发送信息给客户端
	udpSocket.sendto(ret, addr);
	print(addr);

#关闭套接字
udpSocket.close();

UDP客户端

from socket import *;

host = "localhost";#服务器地址
port = 8888;#端口
addr = (host, port);

#创建socket
udpSocket = socket(AF_INET, SOCK_DGRAM);

while True:
	data = input(">");
	if data == "exit":
		break;
	send_result = bytes(data, "utf-8");
	#发送数据给服务端
	udpSocket.sendto(send_result, addr);

	#接收服务端反馈的信息
	data, addr = udpSocket.recvfrom(1024);
	print(str(data, "utf-8"));
#关闭套接字
udpSocket.close();