Bash Script Here Documents FTP - linux

Question

I recently discovered "here" statements while working with a bash script for automating an ftp process.
Reference for Here Documents: http://tldp.org/LDP/abs/html/here-docs.html
The ftp process takes fairly long in the bash script, and I wanted specifically to run it in the background and have the next line of the bash script continue after the ftp process. How would I do this for "here" documents?
FTP snippet:
USER="test"
PASSWD="test"
ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
quit
END_SCRIPT
For example:
I want to be able to do this:
run ftp snippet &
run other shell commands
but I'm not quite sure where to put the &
I have tried so far:
Attempt 1: (I believe that this is syntactically incorrect and does not work):
function do_ftp() {
ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
quit
END_SCRIPT
}
do_ftp &
//additional commands
Attempt 2:
USER="test"
PASSWD="test"
ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
quit
END_SCRIPT &
Attempt 3 :
USER="test"
PASSWD="test"
ftp -n $HOST & <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
quit
END_SCRIPT

Answer 1

I haven't tested it on ftp BUT:
I know when you want to put variables on HEREDOC you should do something else
For example I tried the following for ssh command:
while read pass port user ip fileinput fileoutput filetemp; do
sshpass -p$pass ssh -o 'StrictHostKeyChecking no' -p $port $user#$ip fileinput=$fileinput fileoutput=$fileoutput filetemp=$filetemp 'bash -s'<<ENDSSH1
python /path/to/f.py $fileinput $fileoutput $filetemp
ENDSSH1
done <<____HERE1
PASS PORT USER IP FILE-INPUT FILE-OUTPUT FILE-TEMP
____HERE1
May be something like this is needed by you...