python ftp

#fpt_server.py
#__*__ encoding=utf-8 __*__
import socket ,os 

class MyClass(object):

    def __init__(self):
        print('server start.....')
        server = socket.socket()
        server.bind(('localhost',8888))
        server.listen()

        while True:
            conn, addr = server.accept()
            print("new conn:",addr)
            while True:
                print("等待新指令")
                data = conn.recv(1024)
                if not data:
                    print("客户端已断开")
                    break
                cmd,filename = data.decode().split()
                print(filename)
                if os.path.isfile(filename):   #�ж��Ƿ����ļ�
                   f = open(filename,"rb")     #���ļ�
                   file_size = os.stat(filename).st_size      #�ļ���С
                   conn.send( str(file_size).encode() )       #send file size  ��ֹճ��
                   conn.recv(1024)                            #wait for ack
                   for line in f:
                      conn.send(line)                         #��ʼ����
                   f.close()
                print("send done")

        server.close()

#ftp_client.py
#__*__ encoding=utf-8 __*__
import socket
import hashlib
from gettext import find

class MyClass(object):

    def __init__(self):
        print('client start....')
        client = socket.socket()
        client.connect(('localhost', 8888))
        targetpath='E:\\python\\recievedir'
        while True:
            cmd = input(">>:").strip()
            if len(cmd) == 0:
                print('test cmd len is 0')
                continue

            if cmd.startswith("get"):                   #判断是否以字符串‘get’ 开头
                client.send(cmd.encode())               #把需要下载的文件发给server端
                server_response = client.recv(1024)     #接收server端发过来的文件大小
                print("servr response:", server_response)     #打印文件大小
                client.send(b"ready to recv file")            #防止粘包
                file_total_size = int(server_response.decode())
                print(file_total_size)
                received_size = 0                  #已经接收的大小
                filename = cmd.split()[1]
                targetname=filename
                targetname=MyClass.retFileWithType('',targetname)
                f = open(targetpath+'\\'+targetname + ".new", "wb")      #创建新文件  用于保存
#                 f = open(filename + ".new", "wb")      #创建新文件  用于保存

                while received_size < file_total_size:
                    if file_total_size - received_size > 1024:  # 要收不止一次
                        size = 1024
                    else:  # 最后一次了，剩多少收多少
                        size = file_total_size - received_size
                        print("last receive:", size)

                    data = client.recv(size)
                    received_size += len(data)
                    f.write(data)
#                     print(file_total_size,received_size)
                else:
                    print("file recv done", received_size, file_total_size)
                    f.close()
        client.close()

    def retFileWithType(self,xname):
        #     xname=r'E:\\python\\recievedir\\data.pkl'
        #     xname=r'E:\python\test.jpg'
#         print(xname)
        xname=repr(xname)
        FileWithType=""
        try:
            if xname.index(r'\\')>0 :
                xname=xname.replace(r'\\', '\\')
                x=xname.rfind('\\')
#                 print(x,xname[x+1:])
                retFileWithType=xname[x+1:]

        except  (ValueError) as e:
                xname=xname.replace('\\', r"\\")
                x=xname.rfind(r'\\')
#                 print(x,xname[x+2:])
                retFileWithType=xname[x+2:]

        retFileWithType = retFileWithType.replace("\'",'')

        return  retFileWithType