Downloading a directory tree with ftplib

by

this should do the trick 🙂

import sys
import ftplib
import os
from ftplib import FTP
ftp=FTP("ftp address")
ftp.login("user","password")

def downloadFiles(path,destination):
#path & destination are str of the form "/dir/folder/something/"
#path should be the abs path to the root FOLDER of the file tree to download
    try:
        ftp.cwd(path)
        #clone path to destination
        os.chdir(destination)
        os.mkdir(destination[0:len(destination)-1]+path)
        print destination[0:len(destination)-1]+path+" built"
    except OSError:
        #folder already exists at destination
        pass
    except ftplib.error_perm:
        #invalid entry (ensure input form: "/dir/folder/something/")
        print "error: could not change to "+path
        sys.exit("ending session")

    #list children:
    filelist=ftp.nlst()
    
    for file in filelist:
        try:
            #this will check if file is folder:
            ftp.cwd(path+file+"/")
            #if so, explore it:
            downloadFiles(path+file+"/",destination)
        except ftplib.error_perm:
            #not a folder with accessible content
            #download & return
            os.chdir(destination[0:len(destination)-1]+path)
            #possibly need a permission exception catch:
            with open(os.path.join(destination,file),"wb") as f:
                ftp.retrbinary("RETR "+file, f.write)
            print file + " downloaded"
    return

source="/ftproot/folder_i_want/"
dest="/systemroot/where_i_want_it/"
downloadFiles(source,dest)

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