单进程-单线程-非阻塞-长链接

单进程-单线程-非阻塞实现并发

# 单进程-单线程-非阻塞实现并发
import socket
import time
def main():
	tcp_server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM) #新建一个服务器socket
	tcp_server_socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1) #解决端口被占用问题
	tcp_server_socket.bind(("",7890))  # 绑定本地端口
	tcp_server_socket.setblocking(False)  # 设置服务端为非阻塞
	tcp_server_socket.listen(128) # 设置为监听模式
	client_socket_list = list()  # 新建一个列表用来存储客户端socket
	while True:
            time.sleep(0.5) #设置发送请求频率
            try:
                new_client_socket,new_addr = tcp_server_socket.accept()
            except Exception as  ret:
                print("没有新的客户端访问")
            else:
                print("有新的客户端到来")
                new_client_socket.setblocking(False)  # 设置新的客户端为非阻塞
                client_socket_list.append(new_client_socket)
            for new_client_socket in client_socket_list:
                try:
                        recv_data = new_client_socket.recv(1024).decode("utf-8")
                except Exception as ret:
                        print("客户端没有发送数据")
                else:
                        if recv_data:
                                print(recv_data)
                        else:
                                new_client_socket.close()
                                client_socket_list.remove(new_client_socket)
                                print("客户端已经关闭")

if __name__ == "__main__":
	main()