From 29f95bb251b5d139ab62e33f08a2707c4b848605 Mon Sep 17 00:00:00 2001
From: Jafar Akhondali <jafar.akhoondali@gmail.com>
Date: Tue, 30 Jul 2024 18:21:29 +0200
Subject: [PATCH] Block malicious looking requests to prevent path traversal
 attacks.

---
 tools/webserver.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/webserver.js b/tools/webserver.js
index 7844464..b1db94a 100644
--- a/tools/webserver.js
+++ b/tools/webserver.js
@@ -6,6 +6,11 @@ var http = require("http"),
     port = process.argv[2] || 8888;
 
 http.createServer(function(request, response) {
+    if (path.normalize(decodeURI(request.url)) !== decodeURI(request.url)) {
+        response.statusCode = 403;
+        response.end();
+        return;
+    }
   var uri = url.parse(request.url).pathname
     , filename = path.join(process.cwd(), uri);