#3220682 Pagination fix

includes/canvas_api.inc

@@ -78,7 +78,7 @@ class Canvas {
 			// We use a counter as a failsafe to this becoming an infinite loop.
 			$i = 0;
 			while($next){
-				$response = $this->client->get($next);
+				$response = drupal_http_request($next, $options);
 				$data = array_merge($data,json_decode($response->data,TRUE));
 				$next = $this->_getNextURL($response);
 				$i++;
@@ -121,8 +121,7 @@ class Canvas {
    */
   private function _getNextURL($response){
   	if(isset($response->headers['link'])){
-			$linkHeader = $response->headers['link'];
-			$link = reset($linkHeader);
+			$link = $response->headers['link'];
 			$matches = [];
 			$pattern = '/,<(.+)>; rel="next"/';
 			preg_match($pattern, $link, $matches);