Example Zend Bol.com REST Controller

BolController.php

<?php 
class BolController extends Zend_Controller_Action {
	
	private function getSignature($date, $httpMethod, $url, $contentType, $queryParams) {
	
		$signature = $httpMethod . "\n\n";
		$signature .= $contentType . "\n";
		$signature .= $date."\n";
		$signature .= "x-openapi-date:" . $date . "\n";
		$signature .= $url."\n";
		
		$publicKey = "XX";
		$privateKey = "YY";
		
		return $publicKey . ':' . base64_encode(hash_hmac('SHA256', $signature, $privateKey, true));
	}
	
	public function indexAction() {

		$contentType = "application/xml";
		$today = gmdate('D, d F Y H:i:s \G\M\T');
		$httpMethod = "GET";
		
		$url = '/openapi/services/rest/catalog/v3/products/1001004006016448/';
		$parameters = '';
		$signature =  $this->getSignature($today, $httpMethod, $url, $contentType, $parameters);
		
		$headers = array(
			"Content-type" => $contentType,
			"X-OpenAPI-Authorization" => $signature,
			"X-OpenAPI-Date" => $today
		);
		
		$rest = new Zend_Rest_Client("https://openapi.bol.com/");
		$rest->setNoReset(true);
		
		$http = $rest->getHttpClient();
		$http->setHeaders($headers);
		
		$rest->setHttpClient($http);
		echo $rest->restGet($url);
		exit();
	}
}