diff --git a/sockets/probe_railgun.js b/sockets/probe_railgun.js
index 654265f..4bd962a 100644
--- a/sockets/probe_railgun.js
+++ b/sockets/probe_railgun.js
@@ -51,24 +51,32 @@
     if (Buf.length >= 40) flush();
   };
 
-  // ---- ③ WS 上行记录 ----
+  // ---- ③ WS 上行记录（游戏发的是 Blob，必须异步读，否则 hex 恒为空）----
+  var Hex = function (u) {
+    var h = '';
+    for (var i = 0; i < u.length; i++) h += (u[i] < 16 ? '0' : '') + u[i].toString(16);
+    return h;
+  };
   try {
     var W = window.WebSocket;
     if (W && W.prototype && !W.prototype.__probeWrapped__) {
       var Orig = W.prototype.send;
       W.prototype.send = function (d) {
         try {
-          if (d && d.byteLength !== undefined) {
-            var u = new Uint8Array(d.slice ? d.slice(0, 16) : d, 0, Math.min(16, d.byteLength));
-            var h = '';
-            for (var i = 0; i < u.length; i++) h += (u[i] < 16 ? '0' : '') + u[i].toString(16);
-            Buf.push('[+' + Now() + 'ms] SEND len=' + d.byteLength + ' hex=' + h);
+          if (d instanceof Blob) {
+            var size = d.size;
+            d.slice(0, 24).arrayBuffer().then(function (ab) {
+              Buf.push('[+' + Now() + 'ms] SEND blob len=' + size + ' hex=' + Hex(new Uint8Array(ab)));
+            }).catch(function () {});
+          } else if (d && d.byteLength !== undefined) {
+            var u = new Uint8Array(d.slice ? d.slice(0, 24) : d, 0, Math.min(24, d.byteLength));
+            Buf.push('[+' + Now() + 'ms] SEND len=' + d.byteLength + ' hex=' + Hex(u));
           }
         } catch (e) {}
         return Orig.apply(this, arguments);
       };
       W.prototype.__probeWrapped__ = true;
-      Buf.push('WS send 已挂（记帧长+前16字节）');
+      Buf.push('WS send 已挂（Blob 异步读，记前 24 字节）');
     }
   } catch (e) {}