for racc/callback/mh/weisanhuo_normal.php bug

racc/callback/mh/weisanhuo_normal.php

@@ -2,7 +2,11 @@
 $content = $_SERVER['post_content'] ?? [];
 Log::record("weissanhuo_normal content=$content",Log::DEBUG);
 
-$input = json_decode($content,true);
-refill\util::push_notify('weisanhuo_normal',$input);
 
-echo ('success');
+$input = json_decode($content,true);
+if(!empty($input)) {
+    refill\util::push_notify('weisanhuo_normal',$input);
+    echo ('success');
+} else {
+    echo ('fail');
+}