Allow changing format with query param

status.php

@@ -47,12 +47,25 @@ $fallback_response_type = 'text/plain';
 if (!isset($_SERVER['HTTP_ACCEPT']) || !in_array($_SERVER['HTTP_ACCEPT'], $valid_response_types, true)) {
    $_SERVER['HTTP_ACCEPT'] = $fallback_response_type;
 }
-if ($_SERVER['HTTP_ACCEPT'] === 'text/plain') {
+
+$format = $_SERVER['HTTP_ACCEPT'];
+if (isset($_REQUEST['format'])) {
+   switch ($_REQUEST['format']) {
+      case 'json':
+         $format = 'application/json';
+         break;
+      case 'plain':
+         $format = 'text/plain';
+         break;
+   }
+}
+
+if ($format === 'text/plain') {
    Toolbox::deprecated('Plain-text status output is deprecated please use the JSON format instead by specifically setting the Accept header to "application/json". In the future, JSON output will be the default.');
 }
-header('Content-type: ' . $_SERVER['HTTP_ACCEPT']);
+header('Content-type: ' . $format);
 
-if ($_SERVER['HTTP_ACCEPT'] === 'application/json') {
+if ($format === 'application/json') {
    echo json_encode(StatusChecker::getServiceStatus($_REQUEST['service'] ?? null, true, true));
 } else {
    echo StatusChecker::getServiceStatus($_REQUEST['service'] ?? null, true, false);