My Website Payments Pro Creates 2 Orders

Hello all! We have been having problems with Website Payments Pro module since a long time ago, not sure how it started. Basically, when a person orders using Credit Card, I found out that zen cart tries to create 2 orders, 1 from the checkout_process.php file, and one from the ipn_main_handler.php file (data passed from Paypal). The one passed by Paypal will result in an error, because it won't be able to read the customer's session, and will create a fake one. The data being posted by Paypal doesn't include the customer's session ID, so it randomly takes a session from other people. :-/

So my question is... which of the 2 SHOULD create the order? checkout_process.php or ipn_main_handler.php? I checked my Paypal (normal Paypal/express checkout) module, and it's working fine because a) it passes the customer's session ID to Paypal and Paypal passes it back, and the ipn handler can read the session again, b) the Paypal module's before_process() function has a catch/condition, that is if it detects it came from Paypal, it doesn't create the order and lets the IPN main handler create the order. paypalpd only has this condition if there is an error. If there isn't an error, it continues the checkout_process.php script, hence an order is created.

I hope you can help me! I just need suggestions on where in paypaldp module to look, or if I should be passing the session ID to paypal.

Thanks!

The paypaldp module uses the before_process() function to complete the payment, and moves on to the checkout_process module to store the order correctly.

If you're also getting records from the ipn_main_handler.php for transactions completed with Website Payments Pro, then you've got something damaged in your ipn code.
It has nothing to do with passing session ID to PayPal.
The ipn_main_handler should only "create" an order when the transaction was initiated via the Website Payments Standard/IPN module. Otherwise it should only be updating existing transactions if needed.

Maybe yours is using old code mixed with newer code?

DrByte:

Maybe yours is using old code mixed with newer code?

Thanks DrByte! That makes sense. I imagine the site I manage to be a Frankenstein lol. I got the paypaldp and ipn_main_handler.php from 1.3.8, but my paypal_functions.php file is I think 1.3.5. (not really sure because I got it from somebody else). I got paypaldp to work by copying functions needed from the 1.3.8 version of paypal_functions.php to the paypal_functions.php that we have right now.

I checked the before_process of paypaldp, traced the cURL and noticed this line:

  $values['NOTIFYURL'] = urlencode(zen_href_link('ipn_main_handler.php', '', 'SSL',false,false,true));

(under the DoDirectPayment function in paypal_curl.php)

I think this is the one that tells Paypal to postback the info to our handler. Is this line needed? Also, I'm guessing the catching/order-creation-prevention for paypaldp happens in ipn_main_handler.php?

The fix I did, which only works in sandbox environment, was to add a checking in the zen_paypal table if that transaction has already been entered, and if it's status is complete. If it is, it gets skipped. When I tested it in the live/real environment, it doesn't work. I think the live server posts back the info to the handler faster than the sandbox.

jaypee:

I got the paypaldp and ipn_main_handler.php from 1.3.8, but my paypal_functions.php file is I think 1.3.5. (not really sure because I got it from somebody else). I got paypaldp to work by copying functions needed from the 1.3.8 version of paypal_functions.php to the paypal_functions.php that we have right now.Why the bleep would you do that? Sheesh!
I'm sorry, hybrid combining of functions/features between versions is not a supported configuration.
It's hard enough supporting "the last 2 versions" and working on writing a new one, and then people go mixing-and-matching on a whim ... AND you don't even disclose that fact until nothing else makes sense and you're exposed.

Good luck.