[fw-general] [ Zend_Soap_Client ] - How to add extra headers?

[Juan Felipe Alvarez Saldarriaga]

Hey!.

I'm trying to add some soap headers using SoapHeader class, so I
create a new class that extends from Zend_Soap_Client, I'm  using the
callback (_doRequest) to get the current SoapClient instance and add
my soap headers, but cause the method method returns void I got an
exception: "SoapClient::__doRequest() returned non string value" what
do I need to return? the $client?, here's my class:

class My_Client extends Zend_Soap_Client
{
    public function _doRequest( Zend_Soap_Client_Common $client,
$request, $location, $action, $version, $one_way = null )
    {
        // ... extra headers logic.

        $client->__setSoapHeaders( $this->getWsSecurityHeader() );
    }
}

Thanks.