python 学习第二 十天（并发的tcp）

tcp并发

• 服务端

import socketserver
import struct
class mysocket(socketserver.BaseRequestHandler):
    def handle(self,buffersize=10):
        print(self.request)#一个连接对象
        print(self.client_address)#一个客户端的地址
        while True:
            try:

                head=self.request.recv(4)
                head=struct.unpack('i',head)[0]
                n=head//buffersize
                m=head % buffersize
                l=(self.request.recv(buffersize) for i in range(n))
                if l:
                    if m :
                        remain=self.request.recv(m)
                        recv_msg=b''.join(l)+remain
                    else:
                        recv_msg=b''.join(l)
                else:
                    recv_msg=self.request.recv(m)
                if recv_msg!=b'':
                    print(recv_msg.decode('utf8'))
                    lenth_backdata = struct.pack('i', len('消息已收到'.encode('utf8')))
                    self.request.send(lenth_backdata)
                    self.request.send('消息已收到'.encode('utf8'))
            except Exception:
                break
if __name__== '__main__':

    s=socketserver.ThreadingTCPServer(('127.0.0.1',8000),mysocket)
    s.serve_forever()
    pass

• 客户端
  客户端不变

import socket
import struct
buffersize=5
sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sock.connect(('127.0.0.1',8000))#连接服务器

while True:


    data=input('>>')
    if data=='':
        continue
    if data=='q':
        break
    sock.send(struct.pack('i',len(data.encode('utf8'))))
    sock.send(data.encode())

    lenth_data = sock.recv(4)
    lenth = struct.unpack('i', lenth_data)[0]
    n = lenth // buffersize
    m = lenth % buffersize
    l = [sock.recv(buffersize) for i in range(n)]
    if l:
        if m:
            remain = sock.recv(m)
            recv_mess = ''.encode().join(l) + remain
        else:
            recv_mess = ''.encode().join(l)
    else:
        recv_mess = sock.recv(m)
    print(recv_mess.decode('utf8'))