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feat(argus): SPA fallback for missing paths under BNS domains

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When a request to /bns/<name>/<path> misses in Sia AND the path has
no file extension (looks like a client-side route, not an asset),
serve the domain's own index.html instead. Same shape as nginx's
try_files … /index.html — lets any hosted site use the History API
for pretty URLs.

Extension-having requests (missing .png / .js / .json / …) still
404 as they should — those should never be routed by a client-side
router and swallowing them would hide real bugs.

Deployed to silentmode 2026-09-16:
  scp Argus/src/gateway/public-gateway.mjs
      silentmode:/tmp/public-gateway.mjs
  sudo cp … /opt/bns-gateway/public-gateway.mjs
  sudo systemctl restart bns-gateway

Companion Deviant commit ("widescreen swap + URL routing") uses
this to serve /bns/potidaea.asm/katalogos etc. from the same
index.html.
This commit is contained in:
Local Dev 2026-09-16 18:39:11 +02:00
parent 8cb82d0d31
commit 3e6eb1d392
1 changed files with 11 additions and 1 deletions
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12
src/gateway/public-gateway.mjs
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@ -234,7 +234,17 @@ async function serve(res, name, reqPath, baseHref) {
: 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}`);
let up = await aws.fetch(`${S3_ENDPOINT}/${key}`);
// SPA fallback — if the extension-less path 404s, serve the domain's
// own index.html so client-side routers (History API) can pick up
// /katalogos, /anthemus, /artemision, etc. under any BNS mount.
// We only fall back when the requested path has no file extension —
// requests for missing images / json / js still 404 as they should.
if (up.status === 404 && !/\.[a-z0-9]+$/i.test(reqPath) && reqPath !== "/") {
const fallbackKey = (base.endsWith("/") ? base : base + "/") + "index.html";
const fb = await aws.fetch(`${S3_ENDPOINT}/${fallbackKey}`);
if (fb.ok) { up = fb; }
}
const buf = Buffer.from(await up.arrayBuffer());
let ct = up.headers.get("content-type"); if (!ct || ct === "application/octet-stream") ct = guess(key);
if (ct.includes("text/html")) { res.writeHead(up.status, { "content-type": ct }); return res.end(injectBase(buf.toString("utf8"), baseHref)); }