From 227a0054001fc2dbbb65520fc354d2323c653459 Mon Sep 17 00:00:00 2001
From: Zaid Humaimidi <zaid@genieacs.com>
Date: Thu, 7 Mar 2024 13:27:06 -0800
Subject: [PATCH] Fix exception when URL has two trailing slashes

---
 lib/ui.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/ui.ts b/lib/ui.ts
index 11f4e9d..f7f5e04 100644
--- a/lib/ui.ts
+++ b/lib/ui.ts
@@ -45,6 +45,10 @@ koa.on("error", (err, ctx) => {
   setTimeout(() => {
     // Ignored errors resulting from aborted requests
     if (ctx?.req.aborted) return;
+
+    // Ignore client errors (e.g. malicious path)
+    if (err.status === 400) return;
+
     throw err;
   });
 });
@@ -203,6 +207,10 @@ router.post("/init", async (ctx) => {
 });
 
 router.get("/", async (ctx) => {
+  // koa-router seems to tolerate double slashes in the URL but that can
+  // be problematic when using relatives asset paths in HTML
+  if (ctx.path.endsWith("//")) return;
+
   const permissionSets: PermissionSet[] =
     ctx.state.authorizer.getPermissionSets();