Zend Framework: Paypal - zend-framework

Question

I have been attempting to implement a paypal functionality into my application by following the example here: http://www.alexventure.com/2011/04/02/zend-framework-and-paypal-api-part-2-of-2/
This is my paymentAction in my controller.
public function paymentAction()
{
$auth= Zend_Auth::getInstance();
$user= $auth->getIdentity();
$username = $user->username;
$cart = new Application_Model_DbTable_Cart();
$select = $cart->select()
->from(array('c' => 'cart'))
->join(array('p' => 'product'), 'p.productid = c.productid')
->where('username = ?', $username)
->setIntegrityCheck(false);
$fetch = $cart->fetchAll($select)->toArray();
$paypal = new My_Paypal_Client;
$amount = 0.0;
foreach($fetch as $item) {
$amount = $amount + ($item['price']*$item['quantity']);
}
$returnURL = 'http://www.google.com';
$cancelURL = 'http://www.yahoo.com';
$currency_code = 'USD';
$reply = $paypal->ecSetExpressCheckout(
$amount,
$returnURL,
$cancelURL,
$currency_code
);
if ($reply->isSuccessfull())
{
$replyData = $paypal->parse($reply->getBody());
if ($replyData->ACK == 'SUCCESS' || $replyData->ACK == 'SUCCESSWITHWARNING')
{
$token = $replyData->TOKEN;
$_SESSION['CHECKOUT_AMOUNT'] = $amount;
header(
'Location: ' .
$paypal->api_expresscheckout_uri .
'?&cmd=_express-checkout&token=' . $token
);
}
}
else
{
throw new Exception('ECSetExpressCheckout: We failed to get a successfull response from PayPal.');
}
}
However, this is the error that returns.
Message: No valid URI has been passed to the client
Where did i go wrong? I would be happy to provide code from other areas of my application if needed. Thanks.

Answer 1

Zend_Http_Client::request() has not received a valid instance of Zend_Uri_Http.
Here's where the error occurs:
/**
* Send the HTTP request and return an HTTP response object
*
* #param string $method
* #return Zend_Http_Response
* #throws Zend_Http_Client_Exception
*/
public function request($method = null)
{
if (! $this->uri instanceof Zend_Uri_Http) {
/** #see Zend_Http_Client_Exception */
require_once 'Zend/Http/Client/Exception.php';
throw new Zend_Http_Client_Exception('No valid URI has been passed to the client');//Note the exact message.
}//Truncated
The only obvious error I see in the code you provided is :
$paypal = new My_Paypal_Client;//no () at end of declaration
I hope you implemented part one of the tutorial where the constructor is built. Otherwise you may just need to pass a better uri.
[EDIT]
I think your problem is here:
//needs a uri value for Zend_Http_Client to construct
$paypal = new My_Paypal_Client($url);
ecSetExpressCheckout does not construct the http client so it has no idea of where it's requesting the token from.
Alternatively you could just add this line below $paypal and above $reply:
//pass the uri required to construct Zend_Http_Client
$paypal->setUri($url);
I just hope you know what the url shouild be.
Good Luck.