tcp connection webservice?

Thanks for you input guys. 

I can set up a webservice on my side and receive the initial
call via a http webservice, and then pass the call to the
3rd party via tcp packet. 
It will be only one type of a message (xml). 

I have no idea how to start. 
Can I do this from a .net webservice? I'd send the xml
request to the 3rd party via tcp call, and wait for a
response and then pass it on to the initial caller? 

Mike
  ----- Original Message ----- 
  From: Terry Voss 
  To: aspnet-architectureaspadvice.com 
  Sent: Wednesday, September 06, 2006 6:09 PM
  Subject: [aspnet-architecture] tcp connection webservice?


  Mike,

  Going to the socket level may not be necessary from all
you've described simple high level http should work with
std TCP/IP:
  (see this example not for the wininet, but the http code
for like signin and etc.) http:/
/www.computer-consulting.com/wininet.htm
  because you are a middle step between two computers versus
just communicating with one, you want the simplest
implementation
  possible so you can focus on that 3 way communication and
not socket detail.
  When you say you need to establish a TCP socket connection
to the 3rd system with designated port, TCP is std
underlying http,
  so I still think the HttpWebRequest object will do it. It
has so much flexibility I've not been stuck yet at doing
any detailed task.
  (except the one mentioned in the article which was a very
wierd situation)
  HTH

  Terry Voss
  ***************

  Hi All,

  I have few questions and I couldn't find anything good on
google about this, if someone could point me to some
direction, or give me any advice on this problem I have, I
would really appriciate it. 

  I have to build a system, which will accept a
request(structured xml) from another location, I then have
to save some information from this request into my database,
and pass the request on to another system (another
location). 

  The third system (the one my application will pass the
request on) has those specifications:
  The system features a simple single request dialogue. 
Using the connection-oriented feature of the TCP connection
the system is able to detect if the response was
successfully delivered to MySystem. In the event that the
response is not successful 3rdSystem will perform a
real-time roll-back of the reserved request.

  Communication:
  I need to establish a TCP socket connection to the
3rdSystem to a designated PORT.
  The socket is closed after each Request/Response. Multiple
connections can be running
  at the same time.

  Security:
  The IP address and port number will be provided for each
client. A VPN connection needs to be set up.

  When I receive the response from the 3rdSystem, I will
pass it on to the first client that is waiting for the
response from the begenning. 

  I need to make the middle software, so I am thinking that
I would implement the same thing the 3rdSystem has. And I
would pass on the same requirements to the client, I need
something very simple and fast. 

  I've got no idea how TCP protocol works, and if I should
do this via a .net webservice, or how? 

  Please help!

  Thank you,
  Mike


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