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Re: FTPAPI



Sender: "Elbert Cook" <elbert@xxxxxxxxxxxxxxx>

Still can't get the FTP connection to work. The bank says its the way they
NAT and that I'm probably out of luck.

However I found out they have a https website for uploading and downloading
files.

I've downloaded the beta version of HTTPAPI and I'm playing with it.
I have successfully logged-on and logged-off from the bank and I'm ready to
try uploading a file.

But I'm not sure of how to upload a file.

Decoding their webpage I have.

<form METHOD="POST" ENCTYPE="multipart/form-data"
ACTION="/servlet/MailboxServlet"
<input TYPE="HIDDEN" NAME="operation" VALUE="UPLOAD">
<input type="radio" name="data_format" value="A" checked>
<input type="FILE" name="sourcefile" value="testfile" size="25"
maxlength="1024">

Do I post the filename, or the file data, do I use the url_post_stmf
command?

POST  'https://www.abc.com/servlet/MailboxServlet'
with parms 'operation=UPLOAD&data_format=A&sourcefile= {Filename or the
ascii file data}'

Prehaps I'm completely missing the boat on how an upload works.

Sorry for all the novice question,


----- Original Message ----- 
From: "Scott Klement" <klemscot@xxxxxxxxxxxx>
To: <ftpapi@xxxxxxxxxxxxx>
Sent: Monday, August 23, 2004 12:09 PM
Subject: Re: FTPAPI


> Sender: Scott Klement <klemscot@xxxxxxxxxxxx>
>
>
> Hi Elbert,
>
> > I connect to their FTP server and get a secure connection on port 20021.
> > I supply or userid and password.
> >
> > If I do a DIR or PUT, the connection eventually times-out.
>
> This is a firewall issue.    Each time you try to do a "DIR" or "LS" or
> transfer a file (either PUT or GET) it makes a separate connection to the
> server.
>
> In passive mode, the server tells the FTP program what port to connect to,
> and then the FTP program connects to the server's port, receives/sends the
> file or directory list, and disconnects.
>
> In standard (non-passive, or "active") mode FTP, the client actually sends
> a port number to the server, and the server makes a connection back to the
> client.
>
> Your firewall isn't allowing these connections through, and that's why the
> timeout is occurring.
>
> To troubleshoot this further.
>
> a) Start an FTP session.  After you've typed the userid and password, type
>     DEBUG 1
>
> b) type DIR.  It should show something like this:
>
>   > DIR
>     >>> PASV
>     227 Entering Passive Mode (192,168,5,7,192,0)
>
>   The word "PASV" means that you're working in passive mode.
>   The numbers in parenthesis are the IP address and port that the client
>   is attempting to connect to.   In this example, the IP address is
>   192.168.5.7.  It should be the same address as the FTP server.  The
>   final numbers are the two bytes that make up the port number.
>   192 * 256 + 0 = 49152, so it's attempting to connect to port 49152 on
>   the FTP server.
>
> c) Here's a standard FTP example of the same thing:
>
>  > dir
>    >>> PORT 192,168,5,4,55,157
>    200 PORT command successful.
>
>  In standard FTP, the FTP client is sending an IP address and port and it
>  expects the server to connect back.  So this time, it'll be an INCOMING
>  firewall rule that needs to be added (which is why passive is the
>  default, so that people don't need to open more incoming ports)
>
>  the number following the "PORT" subcommand is, again, the IP addess
>  followed by 2 bytes for the port. In this case, the port is
>  55 * 256 + 157 = 14237
>
> The really fun part about it is that the port number can/will be different
> with every file transfer or directory listing.  Usually, there's a range
> of port numbers that's used, but on a busy FTP server, that can be a very
> large range.
>
> Good Luck
>
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