Python写一个简单的FTP

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FTP v1.0版，仅实现文件上传，防止粘包，打印进度条，正在写v2版
Server：

import os,socketserver

class MyHandler(socketserver.BaseRequestHandler):
    def handle(self):
        while True:
            try:
                cmd,filename=self.request.recv(1024).decode().split()
                print('Recv:',cmd,filename)
                if os.path.isfile(filename):
                    file_size=os.path.getsize(filename)
                    print('file size:',file_size)
                    self.request.send(str(file_size).encode())  #send file size to client
                    client_ack=self.request.recv(1024)   #wait for client ack
                    print('Client ACK:',client_ack.decode())
                    f=open(filename,'rb')
                    for line in f:
                        self.request.send(line)
                    print('server send success:',filename)
                    f.close()
            except ValueError as e:
                print('error,please retry:',e)
            except ConnectionResetError as e:
                print('error:',e)


if __name__ == "__main__":
    Host,Port='localhost',999
    server=socketserver.TCPServer((Host,Port),MyHandler)
    server.serve_forever()

Client：

import sys
import socket,os
client=socket.socket()
client.connect(('localhost',999))

while True:
    try:
        action=input('Input action and filename:')
        cmd,filename=action.split()
        if len(action) <1:continue
        client.send(action.encode())
        file_size=int(client.recv(1024).decode())
        ack=client.send(b'Already!')
        received_size=0
        f=open(filename,'wb')
        def progressbar():
            percentage = received_size/file_size
            num = int(percentage*100)
            view = '\r %d%%[%-100s]%d%%'%(0,'#'*num,100)
            sys.stdout.write(view)
            sys.stdout.flush()
        while received_size < file_size:
            data=client.recv(1024)
            received_size+=len(data)
            f.write(data)
            progressbar()   
        else:
            print('Recv done')
            f.close()
            os.system('dir')
    except ValueError as e:
        print('error:',e)

client.close()

运行效果：