------------------------------------------getfile.py
!/usr/local/bin/python
from ftplib import FTP # socket-based FTP tools from os.path import exists # file existence test
def getfile(file, site, dir, user=(), , verbose=True, refetch=False): """ fetch a file by ftp from a site/directory anonymous or real login, binary transfer """ if exists(file) and not refetch: if verbose: print(file, 'already fetched') else: if verbose: print('Downloading', file) local = open(file, 'wb') # local file of same name try: remote = FTP(site) # connect to FTP site remote.login(user) # anonymous=() or (name, pswd) remote.cwd(dir) remote.retrbinary('RETR ' file, local.write, 1024) remote.quit() finally: local.close() # close file no matter what if verbose: print('Download done.') # caller handles exceptions
if name == 'main': from getpass import getpass file = 'monkeys.jpg' dir = '.' site = 'ftp.rmi.net' user = ('lutz', getpass('Pswd?')) getfile(file, site, dir, user)
---------------------------------getfilegui.py
from tkinter import Tk, mainloop from tkinter.messagebox import showinfo import getfile, os, sys, _thread # FTP getfile here, not socket from PP4E.Internet.Sockets.form import Form # reuse form tool in socket dir
class FtpForm(Form): def init(self): root = Tk() root.title(self.title) labels = ['Server Name', 'Remote Dir', 'File Name', 'Local Dir', 'User Name?', 'Password?'] Form.init(self, labels, root) self.mutex = _thread.allocate_lock() self.threads = 0
代码语言：javascript复制def transfer(self, filename, servername, remotedir, userinfo):
try:
self.do_transfer(filename, servername, remotedir, userinfo)
print('%s of "%s" successful' % (self.mode, filename))
except:
print('%s of "%s" has failed:' % (self.mode, filename), end=' ')
print(sys.exc_info()[0], sys.exc_info()[1])
self.mutex.acquire()
self.threads -= 1
self.mutex.release()
def onSubmit(self):
Form.onSubmit(self)
localdir = self.content['Local Dir'].get()
remotedir = self.content['Remote Dir'].get()
servername = self.content['Server Name'].get()
filename = self.content['File Name'].get()
username = self.content['User Name?'].get()
password = self.content['Password?'].get()
userinfo = ()
if username and password:
userinfo = (username, password)
if localdir:
os.chdir(localdir)
self.mutex.acquire()
self.threads = 1
self.mutex.release()
ftpargs = (filename, servername, remotedir, userinfo)
_thread.start_new_thread(self.transfer, ftpargs)
showinfo(self.title, '%s of "%s" started' % (self.mode, filename))
def onCancel(self):
if self.threads == 0:
Tk().quit()
else:
showinfo(self.title,
'Cannot exit: %d threads running' % self.threads)class FtpGetfileForm(FtpForm): title = 'FtpGetfileGui' mode = 'Download' def do_transfer(self, filename, servername, remotedir, userinfo): getfile.getfile( filename, servername, remotedir, userinfo, verbose=False, refetch=True)
if name == 'main': FtpGetfileForm() mainloop()
-----------------------------------------------------Form.py from tkinter import * entrysize = 40
class Form: # add non-modal form box def init(self, labels, parent=None): # pass field labels list labelsize = max(len(x) for x in labels) 2 box = Frame(parent) # box has rows, buttons box.pack(expand=YES, fill=X) # rows has row frames rows = Frame(box, bd=2, relief=GROOVE) # go=button or return key rows.pack(side=TOP, expand=YES, fill=X) # runs onSubmit method self.content = {} for label in labels: row = Frame(rows) row.pack(fill=X) Label(row, text=label, width=labelsize).pack(side=LEFT) entry = Entry(row, width=entrysize) entry.pack(side=RIGHT, expand=YES, fill=X) self.content[label] = entry Button(box, text='Cancel', command=self.onCancel).pack(side=RIGHT) Button(box, text='Submit', command=self.onSubmit).pack(side=RIGHT) box.master.bind('<Return>', (lambda event: self.onSubmit()))
代码语言：javascript复制def onSubmit(self): # override this
for key in self.content: # user inputs in
print(key, 't=>t', self.content[key].get()) # self.content[k]
def onCancel(self): # override if need
Tk().quit() # default is exitclass DynamicForm(Form): def init(self, labels=None): labels = input('Enter field names: ').split() Form.init(self, labels) def onSubmit(self): print('Field values...') Form.onSubmit(self) self.onCancel()
