Via script below you can download and sync directories from a remote ftp server to your local directory and vice versa. This script also support utf-8 filenames

ftp_sync.sh

#!/bin/bash
HOST="example.com"
USER="user"
PASS="password"
FTPURL="ftp://$USER:$PASS@$HOST"
echo $FTPURL
LCD="/home/user/local/directory"
RCD="/ftp/remote/directory"

# sync remote directory to the local directory (download)
lftp -c "set ftp:list-options -a;
open '$FTPURL';
set file:charset utf8;
mirror -c $RCD $LCD "



# Syncing local directory with the remote direction and remove teh source file (enable delete if you wish for deletion) upload

#DELETE="--delete"
#lftp -c "set ftp:list-options -a;
#open '$FTPURL';
#cd $RCD;
#lcd $LCD;
#mirror --reverse \
#       $DELETE \
#       --verbose \
#       --exclude-glob a-dir-to-exclude/ \
#       --exclude-glob a-file-to-exclude \
#       --exclude-glob a-file-group-to-exclude* \
#       --exclude-glob other-files-to-exclude"