From 97171868d82565bef6e0107494b4d37516f57bdd Mon Sep 17 00:00:00 2001
From: Jafar Akhondali <jafar.akhoondali@gmail.com>
Date: Tue, 30 Jul 2024 18:09:43 +0200
Subject: [PATCH] Block malicious looking requests to prevent path traversal
 attacks.

---
 server.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/server.js b/server.js
index 585394c..f50a2f7 100644
--- a/server.js
+++ b/server.js
@@ -21,6 +21,11 @@ var path = require('path');
 var fs   = require('fs');
 
 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;
 	var filename = path.join(process.cwd(), uri);