FTP登录 下载上传文件（太过简单暂时未写）

#server ：

import socketserver
import struct
import json
import os
class Myserver(socketserver.BaseRequestHandler):
    def handle(self):
        conn = self.request
        while True:
            try:
                msg = conn.recv(4)
                length = struct.unpack('i', msg)
                key = conn.recv(length[0])
                li = json.loads(key.decode('utf-8'))
                print(li)
                ret = False
                if li[0] == 'zlz' and li[1] == '666':
                    result = '登录成功'
                    length = struct.pack('i', len(result.encode('utf-8')))
                    conn.send(length)
                    conn.send(result.encode('utf-8'))
                    ret = True
                else:
                    result = '登录失败'
                    length = struct.pack('i', len(result.encode('utf-8')))
                    conn.send(length)
                    conn.send(result.encode('utf-8'))
            except ConnectionResetError:
                break
server = socketserver.ThreadingTCPServer(('127.0.0.1',9002),Myserver)
server.serve_forever()

#client

import socket
sk=socket.socket()
import struct
sk.connect(('127.0.0.1',9002))
import sys
import json

class User:
    def __init__(self,account,pwd):
        self.acconut = account
        self.pwd = pwd
        self.info = [self.acconut, self.pwd]
        key = json.dumps(self.info).encode('utf-8')
        length = len(key)
        l=struct.pack('i', length)
        sk.send(l)
        sk.send(key)
while True:
    account=input('输入账号')
    pwd=input('输入密码')
    a=User(account,pwd)
    msg=sk.recv(4)
    length=struct.unpack('i',msg)[0]
    msg=sk.recv(length)
    print(msg.decode('utf-8'))