import socket
import selectors#IO多路选择器模块，使用IO多路复用无需设置非阻塞

epoll_selector = selectors.EpollSelector()#用来和epoll通信的选择器,调用epoll

server = socket.socket()
server.bind(('0.0.0.0',8080))
server.listen(1000)



def read(connection):

    recv_data = connection.recv(1024)
    if recv_data:
        print(recv_data)
        connection.send(recv_data)
    else:
        epoll_selector.unregister(connection)#数据发送完毕，取消注册无需监控
        connection.close()


def accept(server):
    connection,remote_address = server.accept()
    #要准备收数据
    epoll_selector.register(connection,selectors.EVENT_READ,read)

epoll_selector.register(server,selectors.EVENT_READ,accept)#连接过来可读的时候在server上注册事件,accept是回调函数
#事件循环（主动去问epoll哪些socket可以回调，如果有了，就回调他们）
while True:
    event = epoll_selector.select()#查询所有已经准备好的事件，返回一个列表{{二元组列表}}
    for key,mask in event:
        callback = key.data#从key里面把回调函数拿出来
        sock = key.fileobj#从key里面把我们注册的那个socket拿出来
        callback(socket)#回调

import socket
host = '192.168.215.128'
port = 8080
client = socket.socket()
client.connect((host,port))
# client.send(b'haha')
msg = input('-->')
client.send(msg.encode('utf-8'))
recv_data = client.recv(1024)
print(recv_data.decode('utf-8'))
client.close()