I implemented a gateway from HTTP client to sftp/SSH server too.
It can be used with MOUNT like this:

  % delegated -v -P8080 SERVER=http MOUNT="/* sftp://SftpServer/*"

With this MOUNT, you can access "sftp://SftpServer/path" as if it is
"http://DeleGate:8080/path".  To reduce the overhead by repetitive
connection to sftp/SSH server, an active session to sftp/SSH server,
in an active sftp process, is cached and kept alive to be reused. 
The pre-release version of DeleGate including this extension has been
uploaded as DeleGate/9.0.4-pre2 at
<URL:ftp://ftp.delegate.org/pub/DeleGate/alpha/>

In message <_A3040@delegate-en.ML_> on 07/30/05(17:44:59) I wrote:
 |I'm interested in it then I read the specification of sftp in
 |draft-ietf-secsh-filexfer-09.txt, and other docs at
 |<URL:http://www.ietf.org/html.charters/secsh-charter.html>
 |But I felt the sftp/SSH specification is a little too large for
 |trial implementation.  So I did it "using sftp command as a gateway
 |program from FTP client to SFTP server".  I uploaded it as
 |DeleGate/9.0.4-pre1 at <URL:ftp://ftp.delegate.org/pub/DeleGate/alpha/>
 |
 |DeleGate for SFTP/FTP gateway can be invoked like this:
 |
 |  % delegated -v -P8021 SERVER=ftp MOUNT="/* sftp://SftpServer/*"
 |
 |With this DeleGate, you can access "sftp://User:Pass@SftpServer" as if
 |it is "ftp://User:Pass@DeleGate:8021".
 |
 |Although the overhead caused by using sftp command as a gateway and
 |the limitation of available commands in the FTP protocol, it seems
 |to work for practical use.  I tested it with several FTP client
 |including ftp command and Mozilla and MSIE.  I tested the DeleGate on
 |MacOSX and FreeBSD.  For example, the enclosed is the log when I
 |tested it on MacOSX.

Cheers,
Yutaka
--
  D G   Yutaka Sato <pfqcabdyi-iafv4fsyuqnw.ml@delegate.org> http://delegate.org/y.sato/
 ( - )  National Institute of Advanced Industrial Science and Technology
_<   >_ 1-1-4 Umezono, Tsukuba, Ibaraki, 305-8568 Japan
Do the more with the less -- B. Fuller