HTTP Gateway examples?

  • Thread starter Thread starter Jim Hubbard
  • Start date Start date
J

Jim Hubbard

First of all.....Happy New Year to you! I hope you have a successful and
joyous new year.

As for the HTTP Gateway examples.... I'm looking for some sample code that
may illustrate techniques useful in coding an HTTP Gateway.

I want to be able to connect 2 PCs (both behind firewalls) via an HTTP
connection. FTP is also acceptable for this project, but HTTP is best.

Have you seen any code or articles that would be helpful in this respect?

Thank you for your time.

Jim Hubbard
 
Jim said:
First of all.....Happy New Year to you! I hope you have a successful
and joyous new year.

As for the HTTP Gateway examples.... I'm looking for some sample
code that may illustrate techniques useful in coding an HTTP Gateway.
Click to expand...

What is a HTTP gateway? Gateways are ISO layer 3 devices, way below HTTP's
location in the standard network stack.
I want to be able to connect 2 PCs (both behind firewalls) via an HTTP
connection. FTP is also acceptable for this project, but HTTP is
best.
Click to expand...

Regardless of whether you run HTTP or FTP, if the communication is supposed
to be bidirectional, you'll need to run both server and client software on
both boxes. Since there's no native FTP support in .NET before version 2.0,
using HTTP is probably easier to implement (System.Net.WebClient or
System.NetWebRequest) and certainly a lot more firewall friendly -- I assume
port 80 is open on both firewalls.

Cheers,
 
Jim said:
You are right....I should have called it an HTTP-Tunnel to be more
precise.
Click to expand...

So at the end of the day, it's a normal HTTP connection used to transport
Yet Another Protocol. This changes little -- you still need a web server and
a web client ;-)

Cheers,
 
Jim said:
I want to duplicate the activeX component found at
http://www.http-tunnel.com/html/solutions/http_tunnel/activex.asp in
.Net and the associated HTTP-Tunnel Server (also found on the same
site).
It would be used to get around firewalls for a remote help solution
to be provided freely to my customers.
Click to expand...

Note that "getting around the firewall" is highly misleading. You
(hopefully) don't get around the firewall, you just sneak your stuff through
port 80, which is usually open to allow for HTTP traffic.

If you want to implement a true general HTTP tunneling solution, you
probably want to use a more powerful network API than what .NET currently
offers, like Indy (http://www.indyproject.org/). And if you need to hook
into WinSock like HTTP Tunnel does, I guess you need to deal with unmanaged
code anyway.

Cheers,
 
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