From 5b65be24839bf2d089913f696733508c1fbd4c57 Mon Sep 17 00:00:00 2001
From: Local Dev <dev@localhost>
Date: Sat, 29 Aug 2026 13:27:42 +0200
Subject: [PATCH] gateway: auto-index directory paths for s3 records
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silentmode.bch/tools/ was returning the Sia NoSuchKey XML because the
gateway only auto-appended index.html for the root path (/), not for
sub-directory paths (/tools/, /apps/, etc). Trailing-slash URLs now
resolve to <path>/index.html — matches Ariadne's bnsd.js which already
had the same rewrite on the client side.

Verified: /bns/silentmode.bch/tools/ returns 200 with the tools page
(was 404 NoSuchKey).

Fixes the user-reported "download link on silentmode.bch/tools/#theseus
shows an XML NoSuchKey error" — the browser was requesting /tools/
(trailing slash from the URL path), gateway looked up bucket key
bns/silentmode/tools/ which doesn't exist, forwarded the S3 error.

Deployed on the VPS (/opt/bns-gateway/) with the in-place edit path
that keeps the same-dir import shape there (repo has ../lib/, VPS has
./resolver-web.js — the two file layouts intentionally differ).
---
 src/gateway/public-gateway.mjs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/gateway/public-gateway.mjs b/src/gateway/public-gateway.mjs
index 34aec4d..28661b8 100644
--- a/src/gateway/public-gateway.mjs
+++ b/src/gateway/public-gateway.mjs
@@ -171,7 +171,14 @@ async function serve(res, name, reqPath, baseHref) {
       case "s3": {
         const sub = subFolder(name);
         let base = r.s3; if (base.endsWith("/") && sub) base += sub + "/";
-        const key = base.endsWith("/") ? base + (reqPath === "/" ? "index.html" : reqPath.slice(1)) : base;
+        // Auto-index directory paths. S3 has no dir listing, so `/tools/`
+        // would 404 (NoSuchKey) without this — matches how nginx handles
+        // `try_files … /index.html` and how Ariadne's bnsd.js rewrites the
+        // same URLs client-side.
+        const rel = reqPath === "/" ? "index.html"
+                  : reqPath.endsWith("/") ? reqPath.slice(1) + "index.html"
+                  : reqPath.slice(1);
+        const key = base.endsWith("/") ? base + rel : base;
         const up = await aws.fetch(`${S3_ENDPOINT}/${key}`);
         const buf = Buffer.from(await up.arrayBuffer());
         let ct = up.headers.get("content-type"); if (!ct || ct === "application/octet-stream") ct = guess(key);