Problem with New Payment Gateway

Hi!

I'm trying to add a new Payment Gateway using the example that you've shared in your Documentation site (http://www.amember.com/docs/API/Paysystem). I could customize it as per my Payment Gateway's requirement except one thing. My Gateway only accept request using HTTP POST method. But when I was trying to use the example shown in the site, it sends the request using HTTP GET method.

Is there anyway I can use HTTP POST method to send payment request to my Gateway?

For your convenience I'm sharing the Am_Paysystem_MyPaySystem below:

PHP:

class Am_Paysystem_MyPaySystem extends Am_Paysystem_Abstract
{
    const PLUGIN_STATUS = self::STATUS_PRODUCTION; // do not add plugin into production build
    const PLUGIN_REVISION = '@@VERSION@@'; // auto-replaced with production version
 
    const URL = "http://www.gateway.com/test/payment.php";
    protected $defaultTitle = 'MyPaySystem';
    protected $defaultDescription = 'Pay using MyPaySystem payment gateway';
    public function getSupportedCurrencies()
    {
          return array('MYR', 'GBP', 'EUR', 'USD');
    }
    // here you add elements to HTML_QuickForm2 form with
    // parameters necessary to configure your form
    // saved parameters are available with $this->getConfig('paramname')
    // api call in other plugin functions 
    public function _initSetupForm(Am_Form_Setup $form)
    {
        $form->addText('merchant_code', array('size'=>16))
            ->setLabel('Merchant Code');
        $form->addPassword('merchant_key', array('size'=>16))
            ->setLabel('Merchant Key');
    }
    /// now lets write payment redirect function
    public function _process(Invoice $invoice, Am_Request $request, Am_Paysystem_Result $result)
    {
        $a = new Am_Paysystem_Action_Redirect(self::URL);
        $a->MerchantCode = $this->getConfig('merchant_code');
//        $a->PaymentId  = $invoice->getLineDescription();
        $a->RefNo = $invoice->public_id;
        $a->Amount =  $invoice->first_total;
//        $a->sp  = $invoice->second_total;
        $a->UserName = $invoice->getName();
        // set [em] to customer email address
          $a->Currency = $invoice->currency;
        $a->UserEmail = $invoice->getEmail();
        $a->UserContact = $invoice->getPhone();
        $a->Remark = $invoice->getLineDescription();
        $a->Lang = 'UTF-8';
        $a->ResponseURL = $this->getReturnUrl();
        // set [lnk] to "cancel" url where customer may choose other payprocessor for this payment
        $a->lnk = $this->getCancelUrl();
        // now return it to core and aMember will do the rest
        $result->setAction($a);
    }
    // let aMember know how this plugin is going to deal with recurring payments
    public function getRecurringType()
    {
        return self::REPORTS_EOT;
    }
 
    public function getReadme()
    {
return <<<CUT
Some Description about MyPaySystem
CUT;
    }
 
    public function createTransaction(Am_Request $request, Zend_Controller_Response_Http $response, array $invokeArgs)
    {
        return new Am_Paysystem_Transaction_MyPaySystem($this, $request, $response, $invokeArgs);
    }
}


What method should I add or change in the class Am_Paysystem_MyPaySystem to make sure it uses HTTP POST method to send the payment request?

Thanks for your help.

Regards,

--marlon4