Python Simple FTP server

Function Description: Implement Simple file upload and download function

The program is divided into three parts:

①ftp_opr.py upload and download function, need to be together with other programs

②ftp_server.py Service-side program

③ftp_client.py client program

#!/usr/bin/env python# -*- coding:utf-8 -*-#filename: Ftp_opr.pyimport socket,os, Jsondef send_file (socket_object,filename):       ### #传入套接字对象和文件名, hereinafter      fk = open (filename,  ' RB ')     file_size =  Os.path.getsize (filename)     dict = {' filename ': filename, ' file_size ': file_size}     socket_object.send (Json.dumps (dict) encode (' Utf-8 '))     print (' Ready to send the file name: ', dict[' filename '], ' File size: ', dict[' file_size '])     socket_object.recv (1024x768)    ### #等待一个save_file发过来的无用信号 for preventing Sticky pack     socket_object.send (Fk.read ())      fk.close () def save_file (socket_object,filename):    name_size_dict =  Json.loads (SOCKET_OBJECT.RECV (1024x768). Decode (' Utf-8 '))     print (' Ready to receive file name: ', name_size_dict[' FileName '], ' File size: ',  name_size_dict[' file_size ')     socket_object.send (b ' ready ')   ### #发送一个无用的信号 to prevent sticky packets      #filename  = name_size_dict[' filename ']    #### Calling this method requires the filename parameter to be entered, and the dict already contains the filename, so ignore one     file_size = name_size_dict [' File_size ']    fk = open (filename+ '. New ',  ' WB ')      receive_size = 0    while file_size > receive_size:         DATA = SOCKET_OBJECT.RECV (1024x768)          fk.write (data)         receive_size +=  len (data)         print (len (data),  receive_size, file_ Size)     print (' File received! ')     fk.close ()

#!/usr/bin/env python# -*- coding:utf-8 -*-#filename:ftp_server.pyfrom ftp_opr  Import send_file,save_filedef ftp_server ():     sk = socket.socket ()     sk.bind ((' 0.0.0.0 ', 9999))     ### #绑定本机网卡地址和端口      sk.listen ()     while true:        conn, Addr = sk.accept ()         print (' New connection: ', addr)          while True:             CMD = CONN.RECV (1024x768). Decode (' Utf-8 ')              if len (CMD)  == 0:                 print (' client disconnected ')                  break            elif  Cmd.split () [0] ==  ' get ':     ### #对应客户端下载功能                  filename= cmd.split () [1]                 print (CMD)                  send_file (Conn, filename)             elif cmd.split () [0] ==  ' Put ':     ### #对应客户端上传功能                  filename= cmd.split () [1]                 print (CMD)               &nBsp;  save_file (Conn, filename)              else:                  ' Reserved function section '                  pass    sk.close () if __name__ ==  ' __main__ ':     Ftp_server ()

#!/usr/bin/env python# -*- coding:utf-8 -*-#filename: Ftp_client.pyimport socket,os, Jsonfrom ftp_opr import send_file,save_filedef ftp_client ():     sk  = socket.socket ()     sk.connect ((' 127.0.0.1 ', 9999))     #### Connecting the server address and Port     while true:        cmd =  input (' >>>: ')         if len (cmd)  == 0: continue        elif cmd ==  ' Q ':             exit ()          Elif len (Cmd.split ())  > 2:             print (' Too many input parameters, use  put/get + 1 file name ')         elif  cmd.split () [0] ==  ' Get ':     ### #下载功能              Filename= cmd.split () [1]            sk.send ( Bytes (Cmd.encode (' Utf-8 ')))             save_file ( Sk, filename)         elif cmd.split () [0] ==  ' put ':     ### #下载功能              Filename= cmd.split () [1]            sk.send ( Bytes (Cmd.encode (' Utf-8 ')))             send_file ( Sk, filename)         else:             print (' Input error, please enter  put/get +  filename ')         &nbsP;    pass    sk.close () if __name__ ==  ' __main__ ':     ftp_client ()

Python simple FTP server