python--select多路复用socket

server:

import select
import socket
import sys
import queue
import os


#create a TCP/IP socket
server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
server.setblocking(False)

#Bind the socket to the port
server_address = ('localhost',10000)
server.bind(server_address)

#Listen for incoming connections
server.listen(1000)

inputs = [server,]
outputs = []
while True:
    readable,writeable,exceptional = select.select(inputs,outputs,inputs)
    print(readable,writeable,exceptional)
    for r in readable:
        if r is server:  #代表来了一个新连接
            conn,addr = server.accept()
            print("来了一个新连接",conn,addr)
            inputs.append(conn) #是因为这个新建立的连接还没发数据过来，现在就接收的话程序就报错，
                          # 所以要想实现这个客户端发数据来时server端能知道就需要让select再检测这个conn
        else:
            data = r.recv(1024)
            print("收到的数据：",data.decode())
            r.send(data)
            print("send done....")

 client:

import socket

HOST = 'localhost'
PORT = 10000
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
while True:
    msg = bytes(input(">>:").strip(), encoding="utf-8")
    if msg == 'q'.encode("utf-8"):
        exit("退出！")
    s.sendall(msg)
    data = s.recv(1024)
    print('Received',data.decode())
s.close()

 

 

 

select 加入队列的例子：  

####此例子中客户端断开异常未解决

server:

import select
import socket
import sys
import queue
import os


#create a TCP/IP socket
server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
server.setblocking(False)

msg_dic = {}
#Bind the socket to the port
server_address = ('localhost',10000)
server.bind(server_address)

#Listen for incoming connections
server.listen(1000)

inputs = [server,]
outputs = []
while True:
    readable,writeable,exceptional = select.select(inputs,outputs,inputs)
    print(readable,writeable,exceptional)
    for r in readable:
        if r is server:  #代表来了一个新连接
            conn,addr = server.accept()
            print("来了一个新连接",conn,addr)
            inputs.append(conn) #是因为这个新建立的连接还没发数据过来，现在就接收的话程序就报错，
                           # 所以要想实现这个客户端发数据来时server端能知道就需要让select再检测这个conn
            msg_dic[conn] = queue.Queue() #初始化一个队列，后面存要返回给这个客户端的数据
        else:
            data = r.recv(1024)
            print("收到的数据：",data.decode())
            msg_dic[r].put(data)

            outputs.append(r)   #放入返回的连接队列里
            # r.send(data)
            # print("send done....")

    for w in writeable:  #要返回给客户端的连接列表
        data_to_client = msg_dic[w].get()
        w.send(data_to_client)  #返回给客户端的源数据

        outputs.remove(w)  #确保下次循环的时候writeable不返回这个已经处理完的连接

    for e in exceptional:
        if e in outputs:
            outputs.remove(e)
        inputs.remove(e)
        del msg_dic[e]

 

client:

import socket

HOST = 'localhost'
PORT = 10000
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
while True:
    msg = bytes(input(">>:").strip(), encoding="utf-8")
    if msg == 'q'.encode("utf-8"):
        exit("退出！")
    s.sendall(msg)
    data = s.recv(1024)
    print('Received',data.decode())
s.close()