py3 学习 socket 中约到的问题

我在做个作业，建立一个 socket 客户端和一个 socket 服务端，客服端接受用户输入用户名和密码，发送到服务端验证。但是不知怎的好像客户端的数据就是传不过去，抄作业都抄不会…… Google 了好久也没答案。下面贴出代码，望各位大神能指点下方向.（ Python3.5 pycharm 中运行）

**********
客户端 ftpclient.py
**********
import socket
import getpass

class Client(object):
    def __init__(self,host,port):
        self.sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM) #创建 socket 连接
        self.sock.connect((host,port))
        if self.auth():
            self.interactive()

    def auth(self):
        '''
        发送用户名密码至 socket 服务端验证
        :return: 
        '''
        retry_count = 0
        while retry_count <3:
            username = input("username:").strip()
            if len(username) == 0:continue
            passwd = input("password:").strip()
            auth_str = "ftp_authentication|%s|%s"%(username,passwd)
            self.sock.send(auth_str.encode('utf-8')) #这条消息好像没有发送到服务端
            auth_feedback = self.sock.recv(1024)   #进行到这一步的时候报错
            if auth_feedback == "ftp_authentication::success":
                 print("\033[32;1mAuthentication Passed!\033[0m")
                 self.username = username #
                 self.cur_path = username #
                 return True
            else:
                print("\033[31;1mWrong username or password\033[0m")
                retry_count +=1
        else:
            print("\033[31;1mToo many attempts,exit!\033[0m")

    def interactive(self):
        pass
if __name__ == "__main__":
    s= Client('localhost',5678)

控制台输入和反馈：数据没有发送至服务端
C:\Users\Administrator\AppData\Local\Programs\Python\Python35\python.exe C:/Users/Administrator/PycharmProjects/ftp_sample/ftpClient/ftpClient.py
username:234
password:1223
Traceback (most recent call last):
  File "C:/Users/Administrator/PycharmProjects/ftp_sample/ftpClient/ftpClient.py", line 33, in <module>
    s= Client('localhost',5678)
  File "C:/Users/Administrator/PycharmProjects/ftp_sample/ftpClient/ftpClient.py", line 8, in __init__
    if self.auth():
  File "C:/Users/Administrator/PycharmProjects/ftp_sample/ftpClient/ftpClient.py", line 19, in auth
    auth_feedback = self.sock.recv(1024)
ConnectionAbortedError: [WinError 10053] 您的主机中的软件中止了一个已建立的连接.

服务端 ftpServer.py

import  socketserver
class MyTCPHandler(socketserver.BaseRequestHandler):
    exit_flag = False
    def handler(self):
        while not self.exit_flag:
            print('hi')
            msg = self.request.recv(1024)
            print(msg)   #打印从 client 发来的信息。但是一直没有传过来，费解！！！！
            if not msg:
                break
            msg_parse = msg.split("|")
            msg_type = msg_parse[0]
            if hasattr(self,msg_type):
                func = getattr(self,msg_type)
                func(msg_parse)
            else:
                print("--\033[31;1mWrong msg type:%s\033[0m--" % msg_type)
    def authentication(self,msg):
        print('----auth----')



if __name__ == "__main__":
    HOST,PORT ="127.0.0.1",5678
    server =socketserver.ThreadingTCPServer((HOST,PORT),MyTCPHandler)
    server.serve_forever()

控制台反馈：一直在运行，没有任何输出，其实期待输出 print(msg)

C:\Users\Administrator\AppData\Local\Programs\Python\Python35\python.exe C:/Users/Administrator/PycharmProjects/ftp_sample/ftpServer/ftpServer.py