RE: httpapi and proxy servers

["Ian Patterson" <ian@xxxxxxxxxxxxxxxxxxxx>]

Sender: "Ian Patterson" <ian@xxxxxxxxxxxxxxxxxxxx>

Thanks Greg, will check it out.

Regards

Ian Patterson

ian@xxxxxxxxxxxxxxxxx <mailto:ian@xxxxxxxxxxxxxxxxx> 

Grange IT Limited
tel 01947 880458
www.grangesystems.com  



-----Original Message-----
From: owner-ftpapi@xxxxxxxxxxxxx [mailto:owner-ftpapi@xxxxxxxxxxxxx]On
Behalf Of Greg Prior
Sent: 15 September 2004 17:17
To: ftpapi@xxxxxxxxxxxxx
Subject: RE: httpapi and proxy servers


Sender: "Greg Prior" <gprior@xxxxxxxxxxxxxx>

I have used Proxomitron in the past with good success.  It is Windows
based web filter that lets you see exactly how your browser is
communicating with web servers.

http://www.proxomitron.info/index.html

greg

-----Original Message-----
From: owner-ftpapi@xxxxxxxxxxxxx [mailto:owner-ftpapi@xxxxxxxxxxxxx] On
Behalf Of Ian Patterson
Sent: Wednesday, September 15, 2004 10:55 AM
To: ftpapi@xxxxxxxxxxxxx
Subject: RE: httpapi and proxy servers

Sender: "Ian Patterson" <ian@xxxxxxxxxxxxxxxxxxxx>

Having had a brief foray into the RFC, we will go down the route of
sniffing
first :-)

We have a couple of sniffers, but neither of them will trap port 443. I
know
that the info in this port is encrypted, but I had hoped that the HTTP
headers etc may be clear.
The sniffers work OK with port 80, so I could start there & see what the
proxies do, but need ultimately to make 443 work.

Q1. Does anyone know if the HTTP headers are clear in a 443 transmission
?
Q2. Does anyone have a recommendation for a sniffer that works with port
443
?

Regards

Ian Patterson

ian@xxxxxxxxxxxxxxxxx <mailto:ian@xxxxxxxxxxxxxxxxx>

Grange IT Limited
tel 01947 880458
www.grangesystems.com



-----Original Message-----
From: owner-ftpapi@xxxxxxxxxxxxx [mailto:owner-ftpapi@xxxxxxxxxxxxx]On
Behalf Of Scott Klement
Sent: 10 September 2004 16:57
To: ftpapi@xxxxxxxxxxxxx
Subject: Re: httpapi and proxy servers


Sender: Scott Klement <klemscot@xxxxxxxxxxxx>

Hi Ian,

> I remember some time ago a comment from Scott that httpapi does not
yet
> support comms through a proxy server, but may do so in the future.

That's part of the fun of open source, you can write the code yourself!
Currently, I don't need proxy server support in my environment. It
doesn't
make much sense for me to write proxy code that I don't need and can't
test.

> This problem has recently raised its ugly head & I want to have a
brief
> look at the issues. Can anyone point me to doumentation where I can
see
> the 'conversation' needed to talk to a proxy ? Is it a standard ?

There's a standard documented in RFC 2616.  I don't know whether that
standard is what gets used in "the real world."  It might be, but it
might
not be.  It really depends on whether Microsoft decided to use it or
decided to go their own way.

http://www.faqs.org/rfcs/

I'd start by using a packet sniffer to see the conversation that takes
place when you go through the proxy, and then compare that to RFC 2616.
If they're the same, great... if not, you'll have to do some googling to
see if you can find out what's really going on.  That's just the
approach
that I'd take...

> I also have to do this for our Windows system, so may be able to track
the
> IP conversation between our Windows system and a proxy and reproduce
this
in
> AS/400.

Exactly.

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