Text based FTP client settings behind a proxy

Question

I need to create a bash script which will connect to an FTP server, upload a file and close the connection. Usually this would be an easy task but I need to specify some specific proxy settings which is making it difficult.

I can connect to the FTP fine using a GUI client i.e. Filezilla with the following settings:

Proxy Settings
--------------
FTP Proxy : USER@HOST
Proxy Host: proxy.domain.com
Proxy User: blank
Proxy Pass: blank

FTP Settings
------------
Host : 200.200.200.200
Port : 21
User : foo
Pass : bar

What I can't seem to do is replicate these settings within a text based ftp client i.e. ftp, lftp etc. Can anyone help with setting this script up?

Thanks in advance!

Solution

According to the docs, lftp should support the ftp_proxy environment variable, e.g.

ftp_proxy=ftp://proxy.domain.com lftp -c "cd /upload; put file" ftp://200.200.200.200

If that works, you can put

export ftp_proxy=ftp://proxy.domain.com

in your shell configuration files, or

set ftp:proxy=ftp://proxy.domain.com

in your ~/.lftprc.

Alternatively, try running the commands that your GUI FTP client is running, e.g.

upload.lftp

USER ...@...
PASS ...
PUT ...

And run it using -s:

lftp -s upload.lftp 200.200.200.200

Or try curl -T (docs) ncftpput (docs).

Something like:

FTP_PROXY=ftp://proxy.domain.com curl -T uploadfile -u foo:bar ftp://200.200.200.200/myfile

might work.