From b7675248c36e0312d0cbe1850dfbe8aaa15d10d2 Mon Sep 17 00:00:00 2001
From: ZhuangYumin <zhuangyumin@sjtu.edu.cn>
Date: Mon, 18 Dec 2023 01:45:53 +0000
Subject: [PATCH] =?UTF-8?q?=E5=AE=8C=E6=95=B4=E7=9A=84=E6=B7=BB=E5=8A=A0?=
 =?UTF-8?q?=E4=BA=86=E5=AF=B9=E5=8E=9F=E5=A7=8B=E8=AF=B7=E6=B1=82=E7=9A=84?=
 =?UTF-8?q?token=E6=95=B0=E6=A3=80=E6=9F=A5?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 frontend/Web/index.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/frontend/Web/index.js b/frontend/Web/index.js
index 23ed90c..1e5dbe8 100644
--- a/frontend/Web/index.js
+++ b/frontend/Web/index.js
@@ -162,6 +162,12 @@ io.on('connection', async (socket) => {
       socket.emit('response', ret);
     }
     else{
+      if(substrings.length!=4)
+      {
+        console.log("input has "+substrings.length+" words");
+        socket.emit('response', "Invalid Input");
+        return;
+      }
       if(head[1]=='R')
       {
         if(msg.split('\n').length!=2)