客户端验证、tcp协议中多个客户端的同时在线

一、客户端验证

　　当在一个局域网内需要验证是否为合法的客户端连接时，我们需要写代码进行验证。

　　Server端

import os
import hmac
import socket
def auth(conn):
    msg = os.urandom(32)
    conn.send(msg)
    result = hmac.new(secret_key, msg)
    client_digest = conn.recv(1024)
    if result.hexdigest() == client_digest.decode('utf-8'):
        print('是合法的链接')
        return True
    else:
        print('不合法的链接')
        return False
secret_key = b'alex_sb'
sk = socket.socket()
sk.bind(('127.0.0.1',9000))
sk.listen()
conn,addr = sk.accept()

if auth(conn):
    print(conn.recv(1024))
    # 正常的和client端进行沟通了
    conn.close()
else:
    conn.close()
sk.close()

Client端

import hmac
import socket
def auth(sk):
    msg = sk.recv(32)
    result = hmac.new(secret_key,msg)
    res = result.hexdigest()
    sk.send(res.encode('utf-8'))

secret_key = b'alex_sb'
sk = socket.socket()
sk.connect(('127.0.0.1',9000))
auth(sk)
sk.send(b'upload')
# 进行其他正常的和server端的沟通
sk.close()

二、Tcp协议中多个客户端同时在线的功能的实现：

　　Server端

import socketserver # tcp协议端的server端就不需要导入socket
class Myserver(socketserver.BaseRequestHandler):
    def handle(self):
        conn = self.request
        while True:
            conn.send(b'hello')
            print(conn.recv(1024))
server = socketserver.ThreadingTCPServer(('127.0.0.1',9000),Myserver)
server.serve_forever()

　　Client端

import socket
sk = socket.socket()
sk.connect(('127.0.0.1',9000))
while True:
    sk.send(b'hello')
    msg = sk.recv(1024)
    print(msg)
sk.close()