PayPal IPN Failed Handshake Fix

[Camasoft Consulting]

I recently received a notification that PayPal IPN notifications sent to my website PayPal listener were failing. I was able to determine that all of the data was successfully received and stored in the database table, along with the VERIFIED response from PayPal, but they were receiving a 302 instead of a 200 response from my website. This turned out to be a needed fix in the return from the InstantPaymentNotificationsController::process method:

CakePHP-Paypal-IPN-Plugin/Controller/InstantPaymentNotificationsController.php

Lines 30 to 51 in 75d88ad

 public function process() { 
 	$this->autoRender = false; 
 	$this->log('Process accessed', 'paypal'); 
 	if ($this->request->is('post')) { 
 		$this->log('POST ' . print_r($_POST, true), 'paypal'); 
 	} 
 	if ($this->InstantPaymentNotification->isValid($_POST)) { 
 		$this->log('POST Valid', 'paypal'); 
 		$notification = $this->InstantPaymentNotification->buildAssociationsFromIPN($_POST); 
  
 		$existingIPNId = $this->InstantPaymentNotification->searchIPNId($notification); 
 		if ($existingIPNId !== false) { 
 			$notification['InstantPaymentNotification']['id'] = $existingIPNId; 
 		} 
  
 		$this->InstantPaymentNotification->saveAll($notification); 
 		$this->__processTransaction($this->InstantPaymentNotification->id); 
 	} else { 
 		$this->log('POST Not Validated', 'paypal'); 
 	} 
 	return $this->redirect('/'); 
 } 

Specifically line 50: return $this->redirect('/');. This needs to be changed to

return CURLOPT_HTTP200ALIASES;

I am opening this issue and supplying the resolution in the hopes that anyone else who is still using CakePHP 2 and this plugin will find it helpful, since it appears this plugin has not been updated for a long time.

[Nick Baker]

Thank you very much for your contribution. I would encourage you to fork and issue a pull request so that I may review it and get it checked in.

[Ed Stone]

This fix worked for me. Thanks so much!