Error pago por paypal

[jamfranga]

A ver si me podeis echar una mano, no se como ni porque se me ha desconfigurado el pago por paypal y siempre me sale :

 

 

Error occurred:

 

Please try to contact the merchant:

• PayPal response:
  
• ->
  

 

Tengo la versión de prestashop 1.5.0.17

y la de paypal 3.4.8

 

a ver si me podeis ayudar porfavor.

[jamfranga]

algun consejo porfavor?

[Rubén]

Probablemente haya un error en tu configuración, revisa tus pines de PayPal, revisa también el modo SandBox

[Sergio Ruiz]

Probablemente haya un error en tu configuración, revisa tus pines de PayPal, revisa también el modo SandBox

El problema no es ese.

 

A ver si me podeis echar una mano, no se como ni porque se me ha desconfigurado el pago por paypal y siempre me sale :

 

 

Error occurred:

 

 

Please try to contact the merchant:

• PayPal response:
  
• ->
  

 

Tengo la versión de prestashop 1.5.0.17

y la de paypal 3.4.8

 

a ver si me podeis ayudar porfavor.

 

 

Mira lo que comentan aqui: http://www.prestashop.com/forums/topic/231634-problema-paypal-309-y-ps149/ quizas te pase lo mismo..

[Rubén]

El problema no es ese.

 

 

 

 

Mira lo que comentan aqui: http://www.prestasho...al-309-y-ps149/ quizas te pase lo mismo..

 

mmm, no tenía ni idea de que existía ese problema, normalmente suele ser por error de configuración, ¡gracias por la información Rubalcaba!

[jamfranga]

curiosamente tengo 1and1 ... estoy hastas las narices de ellos.

 

Pero en el hilo que comentas al final paypal se lava las manos ... ¿alguna solución?

[Sergio Ruiz]

He encontrado esto: http://www.prestasho...ost__p__1150997

 

We were also experiencing this problem on Prestashop 1.5.3 using the latest PayPal Module version directly from GIT (as of 2013-03-20) only on our production server.

The Paypal express checkout would load with our cart contents, and allow us to login via paypal and pay for the order, however when returning to the store, an error would appear stating "ERROR OCCURRED:" with no log information.

 

How this error comes up

 

From debugging, our system was arriving at this error because /modules/paypal/express_checkout/payment.php was not "hitting" any of the conditions in the file, and instead exited via the else statement on line 344.

This is normally used when Paypal has returned an error; $ppec->logs would contains the errors and these would be put out to the screen, however PayPal had no errors to report in our case.

Looking at the code, we should have been taken in by the if condition on line 146 (see the comment preceding it), but we were not.

 

Debugging the error

 

We added the following two calls on line 100 to show us the values. This will firstly show us if PrestaShop is receiving the response from PayPal, and secondly what PrestaShop has stored for use in the conditions on line 146.

 

var_dump($_REQUEST);

var_dump($ppec);

 

Simply compare the contents of ppec's "token" and "payer_id" fields to what's received in _REQUEST.

If ppec has an empty token or payer_id, you've got the same bug I had, and please continue reading.

If instead you find _REQUEST is empty or incomplete, check your Network tab and ensure you haven't been redirected and you've lost the query variables from Paypal along the way (htaccess rewriteRule being the usual culprit here).

 

The PayPal module sends you to PayPal in the file /modules/paypal/express_checkout/process.php using the function redirectToAPI(). Inside this function, before the redirect to paypal, it calls _storeCookieInfo() which writes token and payer_id to the users cookie.

 

The Bug

 

Under some versions of PHP, PrestaShops method of saving the users cookie - which is to write the contents during the Cookie::_destructor - does not work. It flat out does not write the cookie reliably. I've documented this elsewhere in the past and it really should be addressed, but on later version of PHP (eg. 5.3) it's perfectly fine.

 

Notice in _storeCookieInfo() and redirectToAPI() there are no calls to cookie->write(). This code relies entirely on the Cookie::__destructor method to save the cookie data.

 

Our specific version is PHP 5.2.6 with Zend Engine 2.2.0 and ionCube 3.1.29 on a derivative of CentOS, in case you're wondering.

 

The Fix

 

Around line 420 of /modules/paypal/express_checkout/process.php, before the closing bracket of _storeCookieInfo(), add the following line:

 

$this->context->cookie->write();

 

This causes the cookie to be written before you're sent to paypal. When you come back, you'll now have the correct data stored and PrestaShop will recognise the request.

 

Further Reading

 

If this didn't solve your problem, I feel sorry for you because this has taken me far too long to debug.

If this did solve your problem, chances are you'll have additional issues with PrestaShop in its current configuration. Consider reading my other post on PrestaShop Cookies to address similar issues with Add to Cart and Login problems.

 

Final Thoughts

 

The PayPal modules validation should really be improved to catch this specific instance.

The check that's there is obviously to verify that the inbound users payer_id and token match that of the outbound user, but there's no alert for the user if the stored payer_id or token are empty are invalid.

 

Surely if you're inbound with a payer_id and token but ppec is empty, this means something has gone wrong and the user badly needs to know about it, because as far as PayPal is aware, that payment has gone through, but the order has been now been lost by PrestaShop.