FTP Shell Script mkdir issue - bash

Question

I am using the Bash FTP command to ftp files, however i have a problem where i try to create a directory that is more than 2 folders deep. It works if i use two folders deep but if i go to three folders deep then it fails. For example:
mkdir foo/bar - this works
mkdir foo/bar/baz - this fails
I have also tried this:
mkdir -p foo/bar/baz - which didn't work, it ended up creating a '-p' directory
The shell script i am trying to run is actually quite simple but as you can see the directory structure is 3 folders deep and it fails to create the required folders:
#!/bin/bash
DIRECTORY="foo/bar/baz"
FILE="test.pdf"
HOST="testserver"
USER="test"
PASS="test"
ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASS
mkdir $DIRECTORY
cd $DIRECTORY
binary
put $FILE
quit
END_SCRIPT

Answer 1

mkdir under ftp is implemented by the ftp server, not by calling /bin/mkdir no such options as -p,
what you should do is
mkdir foo
cd foo
mkdir bar
cd bar
mkdir baz
cd baz
If you still want your original construct, you can also do it like this:
#!/bin/bash
foo() {
local r
local a
r="$#"
while [[ "$r" != "$a" ]] ; do
a=${r%%/*}
echo "mkdir $a"
echo "cd $a"
r=${r#*/}
done
}
DIRECTORY="foo/bar/baz"
FILE="test.pdf"
HOST="testserver"
USER="test"
PASS="test"
ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASS
$(foo "$DIRECTORY")
binary
put $FILE
quit
END_SCRIPT

Answer 2

Try lftp instead:
[dong#idc1-server1 ~]$ lftp sftp://idc1-server2
lftp idc1-server2:~> ls
drwxr-xr-x 3 dong dong 4096 Jun 16 09:11 .
drwxr-xr-x 18 root root 4096 Apr 1 22:25 ..
-rw------- 1 dong dong 116 Jun 16 09:28 .bash_history
-rw-r--r-- 1 dong dong 18 Oct 16 2013 .bash_logout
-rw-r--r-- 1 dong dong 176 Oct 16 2013 .bash_profile
-rw-r--r-- 1 dong dong 124 Oct 16 2013 .bashrc
drwx------ 2 dong dong 4096 Jul 24 2014 .ssh
lftp idc1-server2:~> mkdir a/b/c/d
mkdir: Access failed: No such file (a/b/c/d)
lftp idc1-server2:~> mkdir -p a/b/c/d
mkdir ok, `a/b/c/d' created