diff --git a/index.php b/index.php
index e350de6..e5eef94 100644
--- a/index.php
+++ b/index.php
@@ -1,4 +1,24 @@
 <?php 
+$allowedRefererDomains = [
+    '8.140.229.121',
+    '154.9.228.54',
+];
+
+$designatedImagePath = 'doge.jpg'; 
+
+if (isset($_SERVER['HTTP_REFERER'])) {
+    $refererUrl = $_SERVER['HTTP_REFERER'];
+    $refererHost = parse_url($refererUrl, PHP_URL_HOST);
+    if (in_array($refererHost, $allowedRefererDomains)) {
+        if (file_exists($designatedImagePath) && is_readable($designatedImagePath)) {
+            $imageMimeType = mime_content_type($designatedImagePath);
+            header('Content-Type: ' . $imageMimeType);
+            readfile($designatedImagePath);
+            exit;
+        }
+    }
+}
+
 include('config.php');
 
 // 安全地获取API名称