Refactor error handling for GuzzleException

- Refactored error handling to check for response in exception.

index.php

@@ -28,8 +28,13 @@ if($_SERVER["REQUEST_URI"] == '/metrics' || php_sapi_name() == 'cli') {
                 $res = $client->request('GET', $c['http']['url'], $options);
                 $hasresponse = true;
             } catch(GuzzleHttp\Exception\GuzzleException $e) {
+                if(method_exists($e, 'getResponse')) {
+                    $res = $e->getResponse();
+                    $hasresponse = true;
+                } else {
                     $hasresponse = false;
                 }
+            }
 
             if (isset($c['http']['data']) && $c['http']['data'] == 'responsebody') {
                 $output = $res->getBody()->getContents();