[thelist] Server2Server Communication

Fri Apr 21 08:12:46 CDT 2006

Hi,

Use the ServerXMLHTTP classes to create a HTTP request that your server will
send to the payment gateway. You will then receive the response from the
remote server, and can examine the response to see what the error code etc
is.

You then display something appropriate to the end user.

Do not use the XMLHTTP interfaces, as you'll end up being blocked as your
load increases. See:
http://www.adopenstatic.com/cs/blogs/ken/archive/2005/04/16/15.aspx

There's lots of info on using ServerXMLHTTP if you google.

Cheers
Ken

--
www.adopenstatic.com/cs/blogs/ken/
TechEd 2006 Boston See you there: Everything the web administrator needs to
know about MOM 2005

: -----Original Message-----
: From: thelist-bounces at lists.evolt.org [mailto:thelist-
: bounces at lists.evolt.org] On Behalf Of Johnson Borja See
: Sent: Friday, 21 April 2006 9:54 PM
: To: thelist at lists.evolt.org
: Subject: [thelist] Server2Server Communication
: 
: 
: Hi,
: 
: I'm new to server2server sites. I'm using ASP, VBScript and JScript.
: The site is hosted on an IIS running in a Windows 2003 server.
: 
: What had to be done is something like this
: 
: 1. When the user press the submit button on the order form from the
: ecommerce website (which in this context is also the requesting server,
: or merchant server), the merchant server sends a initialisation request
: to the recipient server (a payment gateway) using the format specified
: by the gateway.
: 
: 2. The payment gateway will recive the initialisation request,
: and "respond" back to the requesting server with a success/fail reply
: through a variable named "errorcode".
: 
: 3. If the variable "errorcode" is 0, then requesting gateway will
: redirect the browser of the client to the payment gateway's credit card
: payment form, or if the errorcode is not 0, then show an error message
: on the client browser
: 
: The manual of the payment gateway describes it as an interaction
: between the merchant server and the payment gateway, and it is the
: responsibility of the merchant gateway to redirect the user to the
: payment gateway only if it received the appropriate response from the
: payment gateway.
: 
: 
: The situation
: 
: 4. I've done step 1, send initialisation request to the payment gateway
: using a redirect command, something like
: 
:     dim Gateway, InitParam, ErrorCode
: 
:     Gateway = "https://www.somepaymentgateway.com/init"
:     InitParam = "merchant=12345&amount=1.00&currency=USD ..."
: 
:     Response.Redirect(Gateway + "?" + InitParam)
: 
: 5. I don't know how to receive the "response" from the server, so I put
: a querystring request right after the redirect statement, e.g.
: 
:     InitParam = "merchant=12345&amount=1.00&currency=USD ..."
: 
:     Response.Redirect(Gateway + "?" + InitParam)
: 
:     ErrorCode = Request.Querystring("errorcode")
: 
:     if Errorcode = 0 then
: 
:        Response.Redirect("https://somepaymentgateway.com/ccard?id=abc")
: 
:     endif
: 
: 6. I doubt that this portion would be executed as it follows a
: redirect, but this is actually the brunt of my problem, i.e., how do I
: get something back from the other site after I redirected the control
: to it?
: 
: 7. I tried this by logging to our site, accessing the order form, and
: submitting the form
: 
: - The initialisation request was sent to the payment gateway
: - The payment gateway received it properly, and returned an errorcode=0
: - However, I only know that an errorcode=0 is received because it
: showed on my browser (I was testing it and therefore seeing it from the
: client browser)
: - Our site which sent the request to the server did not even see the
: reply.
: 
: 8. My Question:
: 
: How do I get the response back from the payment gateway. When I emailed
: the payment gateway technical people, the reply that I got was that it
: was a Server2Server transaction.
: 
: Am I missing something? Is there a protocol that describes this
: Server2Server transaction?
: 
: I save the source html of the reply I got from the payment gateway, and
: it looks like this (some portions of the html was changed to maintain
: confidentiality):
: 
: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
: <!-- saved from url=(0590)https://pay1.somepaymentgateway.com/init?
: merchantid=12345&amount=1.00&currency=USD&orderid=204200652734-
: 5287&language=en&salutation=Mr.&firstname=Jones&lastname=Jonesy&street=A
: BC&zip=1029&city=Makati%
: 20City&state=NCR&country=PHL&email=jbs at palindrome.ph&phone=123456789&url
: _success=https%3A%2F%2Fwww.oursite.com%
: 2Folp_success.asp&url_failed=https%3A%2F%2Fwww.oursite.com%
: 2Folp_failed.asp&url_cancel=https%3A%2F%2Fwww.oursite.com%
: 2Folp_cancel.asp&url_internal=https%3A%2F%2Fwww.oursite.com%
: 2Folp_internal.asp&signature=1104473112249e2b0f3bacfbba9322e3338eb3c8 --
: >
: <HTML>
: 
: <HEAD>
: <META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
: <META content="Microsoft FrontPage 5.0" name=GENERATOR></HEAD>
: <BODY>
: errorcode=0&amp;errorcodes=&amp;errormessage=&amp;sessionid=33f3b7bdeab3
: 3ed859cb02b5578750ec9f0dfa89&amp;transactionid=8470210&amp;
: user_id=1113198&amp;start_url=https%3A%2F%2Fpay1.somepaymentgateway.com%
: 2F33f3b7bdeab33ed859cb02b5578750ec9f0dfa89%2Fpayment%2Fstart%
: 3Ftransactionid%3D8470210
: 
: </BODY>
: 
: </HTML>
: 
: Any help on this will be greatly appreciated.
: 
: Regards,
: 
: Jones
: --
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