Python uses the ftplib block in the standard library as a small FTP client application

15:40:00

Yesterday, I spent some time reading the documentation and functions of the ftplib block. With the help of the example, I spent an hour creating an FTP client. Program . In general, the FTP process is relatively simple. In summary, it is: Connection -- logon -- operation -- disconnect Code The Code is as follows:

 

#-*-Coding: UTF-8 -*-#! /Usr/bin/Python # filename: ftp_client.pyfrom ftplib import ftpimport sysimport osglobal f_objdef Update (PATH): Global f_objfile = OS. path. split (PATH) [1] ext = OS. path. splitext (File) [1] Try: If ext in ('.txt ', '.htm', 'html'): f_obj.storline ('stor' + file, open (File) else: f_obj.storbinary ('stor' + file, open (file, 'rb'), 1024) handle T: Print 'read file error! 'Def download (path, OUTFILE = none): Global f_objif OUTFILE is none: OUTFILE = sys. stdoutdir = OS. path. split (PATH) [0] file = OS. path. split (PATH) [1] ext = OS. path. splitext (File) [1] default_dir = f_obj.pwd () If DIR is not none: f_obj.cwd (DIR) If Len (File) = 0: print 'Please input right file or path> 'returntry: If ext in ('.txt ', '.htm', '.html', '.png '): OUTFILE = open (file, 'w ') f_obj.retrlines ('RETR' + file, Lambda S, W = OUTFILE. Write: w (S + "/N") else: f_obj.retrbinary ('retr '+ file, OUTFILE. Write) failed T: Print 'Download error! 'Print 'Download success! 'Def func_cmd (CMD, OUTFILE = none): Global f_objif OUTFILE is none: OUTFILE = sys. stdoutif cmd = '1': Print 'current dir files as: 'f _ obj. dir () Elif cmd = '2': Try: Str = ''list = [] dir = raw_input ('input dir> ') List = f_obj.nlst (DIR) ''. join (list) print listparts T: Print 'error' Elif cmd = '3': print 'You Want to upload file to FTP! 'Filename = raw_input ('Please input filename or path> ') Update (filename) print 'upload succ! 'Elif cmd = '4': print 'you want to download files from TFP! 'Filename _ Path = raw_input ('Please input filename or path> ') download (filename_path) print' ------ download succ! ------ 'Elif cmd = '5': Print 'current dir: 'print f_obj.pwd () Elif cmd = '6': try: path = raw_input ('Please input the path> ') f_obj.cwd (PATH) handle T: Print 'error' Elif cmd = '7': try: path = raw_input ('Please input the dir> ') f_obj.mkd (PATH) failed T: Print 'error' Elif cmd = '8': try: dir = raw_input ('Please input the Dir which you want remove> ') f_obj.rmd (DIR) Comment T: Print 'error' Elif cmd = '9': Try: file = Ra W_input ('Please input The FILENAME> ') f_obj.size (File) before T: Print 'error' Elif cmd = '10': f_obj.quit () f_obj.close () print 'end connection ...... 'sys. exit (0) else: Print 'no command! 'Raw _ input ('enter any key continue ..... ') def main (): Global f_objhost =' 204. 45.67.107 'user = '000000' Password = '000000' try: Print 'connect host PC ...... 'F _ OBJ = FTP (host) print f_obj.getwelcome () handle T: Print "can't reach the FTP host! "Sys. exit (1) Try: Print 'login by user ..... 'F _ obj. login ('100', '100') failed T: Print "can't login! "Sys. exit (1) While (1): intro_str = ''' all commands as: 1: display the list of current folder files (including detailed list information) 2: display the current folder file 3: upload File 4: Download file 5: display current directory 6: jump to a directory 7: Create a new directory 8: delete a directory 9: return the file size of a file 10: exit FTP ''' print intro_strcmd = raw_input ('Please input cmd> ') func_cmd (CMD) If _ name _ =' _ main __': main ()