Payment Module and XML?

[cmcneal]

Zencart Version: 1.3.9h
First time user of Zen Cart
No add ons installed on the system yet

Challenge:
I am trying to build a payment gateway module using the Authorize.net structure. I am not sure how to do it as the module uses arrays to submit data to the payment gateway. The requirement for the new payment gateway requires we send payment information using XML. Is there an example of using XML?

Is there a way to debug to see what the contents of the delivery would be prior to sending to the payment gateway so that I can check that what is sent is actually XML and not an array of info?

I am new to PHP and a neophyte to Zen Cart. I appreciate all the help you can give.

[kobra]

other 3rd party payment adds using XML for you to look at

http://www.zen-cart.com/index.php?ma...roducts_id=742
http://www.zen-cart.com/index.php?ma...roducts_id=828

[cmcneal]

Thank you. The EWay trick seems to allow me to communicate with the destination. However, I am always getting back an invalid request. I have asked the other party if what I am sending in an XML is correct. Via e-mail, they said the XML is perfect. Via online, I get invalid request. Somewhere, I may not be doing my XML correctly(?).

Is there a way to create a receiving website just to test echo the XML?

Thanks in advance

[cmcneal]

I guess there was a bit of information that was not emphasized in the requirements. Though the rest of the string is in XML format, the CURL_SETOPT,POSTFIELD should still have &var=$xml_string format.

[cmcneal]

I am trying to create a payment module and the requirement flow is as follow:
a. send request xml
b. receive response xml
c. redirect to external payment site where client enters payment info
d. payment site will redirect to my website checkout_payment and they require me to receive 2nd xml

My questions are:
a. How to redirect to external payment site (yes, the payment site has provided me the secured URL)?
b. How to receive an XML the second time around since it is not some thing I initiated?

Are there examples of this scenario?

[Kim]

Moderator's note - your 2 threads have been merged into one since they are closely related.

[cmcneal]

An Update:

I am able to fulfill all requirements except for receiving responses after redirection. But here is the summary of the flow of what I have done:

a. create an XML string
b. set cURL to pass in the XML string using the format &parm=<XML string>
c. receive the response from cURL
d. parse the response from cURL
e. use the URL specified in the response for redirection
f. redirect using PHP's header command and follow it with a die command
g. user will input the info requested in the redirected payment screen.
h. payment gateway will redirect the screen back to the client and response sent
i. Read and parse response.

It is step i, that I need assistance.

Looking forward to anyone's suggestions.