#!/usr/bin/env python # -*- coding:utf-8 -*- # author: Changhua Gong import selectors import socket sel = selectors.DefaultSelector() ‘‘‘selectors根据系统自动select或epoll‘‘‘ def accept(sock, mask): conn, addr = sock.accept() # Should be ready print(‘accepted‘, conn, ‘from‘, addr) conn.setblocking(False) # 设置连接不阻塞 sel.register(conn, selectors.EVENT_READ, read) # 新连接注册read回调函数 def read(conn, mask): data = conn.recv(1024) # Should be ready if data: print(‘echoing‘, repr(data), ‘to‘, conn) conn.send(data) # Hope it won‘t block else: print(‘closing‘, conn) sel.unregister(conn) conn.close() sock = socket.socket() sock.bind((‘localhost‘, 10000)) sock.listen(100) sock.setblocking(False) sel.register(sock, selectors.EVENT_READ, accept) # 注册sock,有连接进来则调用accept while True: events = sel.select() # 默认阻塞,有活动连接就返回活动的连接列表 for key, mask in events: callback = key.data # accept的内存地址或read的内存地址,即等于read或accept函数 callback(key.fileobj, mask) # 调用对应的回调函数,key.fileobj为文件句柄
本文出自 “90SirDB” 博客,请务必保留此出处http://90sirdb.blog.51cto.com/8713279/1929149
原文地址:http://90sirdb.blog.51cto.com/8713279/1929149