Payment module stuck at checkout_process & before_process function?

[DrByte]

What's the payment module? Looks like it's designed for much older versions of Zen Cart, and is passing unacceptable parameters, or parameters with very long values, both of which will cause a blank page when before_process() is run.

[Kyle_Coventry]

Thanks a ton for the prompt response, really encouraging to see some support on here.

I'm fairly certain you're correct. My clients gateway is EVO Canada, and they've supplied me with a credit card payment module that is supposed to be compatible with Zen, but it's entirely possible that it is only compatible with a much older version. It seems to be sending error messages via URL and other old-style things like that.

Are we going to need to migrate to a different provider? Unfortunately I doubt I have the time nor experience to modify their payment module to work with the updated Zen - is a different provider our only option?

Thanks!

[DrByte]

Post the code from the before_process() function of the module, and we'll see what we can do with it.

[Kyle_Coventry]

Here she is:

function before_process() {

if ($_GET['response'] == '1') return;
if ($_GET['response'] == '2') {
zen_redirect(zen_href_link(FILENAME_CHECKOUT_PAYMENT, 'error_message=' . urlencode(MODULE_PAYMENT_GATEWAY_SERVICES_CC_TEXT_DECLINED_MESSAGE), 'SSL', true, false));
}
// Code 3 is an error - but anything else is an error too (IMHO)
zen_redirect(zen_href_link(FILENAME_CHECKOUT_PAYMENT, 'error_message=' . urlencode(MODULE_PAYMENT_GATEWAY_SERVICES_CC_TEXT_ERROR_MESSAGE), 'SSL', true, false));
}

Any help/direction is appreciated.

[DrByte]

Wow, that's *extremely* basic.

You will need to rewrite both of those zen_redirect segments so that the error_message is passed via the messageStack instead of in the zen_href_link. And you'll want to skip the urlencoding.
An example of the changes you need to make is here: http://www.zen-cart.com/forum/showth...33#post1054133

Or just make sure the language definitions for both of those MODULE_PAYMENT_xxxxxxxx_MESSAGE constants are less than 40 characters each.

[Kyle_Coventry]

Thanks again for the prompt response - tried it again with your suggestions and unfortunately I'm still receiving a blank page with a fairly length URL beginning with the checkout_process.php.

My new module looks like:

function before_process() {

if ($_GET['response'] == '1') return;
if ($_GET['response'] == '2') {
global $messageStack;
$messageStack->add_session('checkout_payment', MODULE_PAYMENT_NET1_TEXT_ERROR_MESSAGE, 'error');
zen_redirect(zen_href_link(FILENAME_CHECKOUT_PAYMENT, '', 'SSL', true, false));
}
// Code 3 is an error - but anything else is an error too (IMHO)
global $messageStack;
$messageStack->add_session('checkout_payment', MODULE_PAYMENT_NET1_TEXT_ERROR_MESSAGE, 'error');
zen_redirect(zen_href_link(FILENAME_CHECKOUT_PAYMENT, '', 'SSL', true, false));
}

Hopefully this was implemented correctly - let me know! Again, thanks for the help, but still having the same issue! Oh, and I ran the echo's again, and the checkout_process is still getting caught up at before_process.

-kyle

[Kyle_Coventry]

Ah, ignore my error messages there... those don't apply to my payment module. I inserted the correct ones and it still displays the blank. Appreciate your thoughts.