pds.ls
atmosphere explorer
pds.ls
tool
typescript
atproto
favicon fetching through worker
handle.invalid
+1
.gitignore
+1
.gitignore
+12
-5
src/components/favicon.tsx
+12
-5
src/components/favicon.tsx
···
6
6
wrapper?: (children: JSX.Element) => JSX.Element;
7
7
}) => {
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const [loaded, setLoaded] = createSignal(false);
9
+
const [src, setSrc] = createSignal("");
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const domain = () => (props.reverse ? props.domain.split(".").reverse().join(".") : props.domain);
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+
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+
const workerUrl = () => `/favicon?domain=${encodeURIComponent(domain())}`;
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+
const directUrl = () => `https://${domain()}/favicon.ico`;
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const content = (
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<Switch>
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<Match when={domain() === "tangled.sh" || domain() === "tangled.org"}>
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<span class="iconify i-tangled size-4" />
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</Match>
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-
<Match when={["bsky.app", "bsky.chat"].includes(domain())}>
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-
<img src="https://web-cdn.bsky.app/static/apple-touch-icon.png" class="size-4" />
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-
</Match>
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<Match when={true}>
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<Show when={!loaded()}>
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<span class="iconify lucide--globe size-4 text-neutral-400 dark:text-neutral-500" />
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</Show>
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<img
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-
src={`https://${domain()}/favicon.ico`}
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+
src={src() || workerUrl()}
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class="size-4"
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classList={{ hidden: !loaded() }}
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onLoad={() => setLoaded(true)}
28
-
onError={() => setLoaded(false)}
29
+
onError={() => {
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+
if (!src()) {
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+
setSrc(directUrl());
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+
} else {
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+
setLoaded(false);
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+
}
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+
}}
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/>
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</Match>
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</Switch>
+100
src/worker.js
+100
src/worker.js
···
486
486
}
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487
}
488
488
489
+
const MAX_FAVICON_SIZE = 100 * 1024; // 100KB
490
+
491
+
async function handleFavicon(searchParams) {
492
+
const domain = searchParams.get("domain");
493
+
if (!domain) {
494
+
return new Response("Missing domain param", { status: 400 });
495
+
}
496
+
497
+
let faviconUrl = null;
498
+
try {
499
+
const pageRes = await fetch(`https://${domain}/`, {
500
+
signal: AbortSignal.timeout(5000),
501
+
headers: { "User-Agent": "PDSls-Favicon/1.0" },
502
+
redirect: "follow",
503
+
});
504
+
505
+
if (pageRes.ok && (pageRes.headers.get("content-type") ?? "").includes("text/html")) {
506
+
let bestHref = null;
507
+
let bestPriority = -1;
508
+
509
+
const rewriter = new HTMLRewriter().on("link", {
510
+
element(el) {
511
+
const rel = (el.getAttribute("rel") ?? "").toLowerCase();
512
+
if (!rel.includes("icon")) return;
513
+
const href = el.getAttribute("href");
514
+
if (!href) return;
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+
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+
// Prefer apple-touch-icon > icon with sizes > icon > shortcut icon
517
+
let priority = 0;
518
+
if (rel === "apple-touch-icon") priority = 3;
519
+
else if (rel === "icon" && el.getAttribute("sizes")) priority = 2;
520
+
else if (rel === "icon") priority = 1;
521
+
522
+
if (priority > bestPriority) {
523
+
bestPriority = priority;
524
+
bestHref = href;
525
+
}
526
+
},
527
+
});
528
+
529
+
const transformed = rewriter.transform(pageRes);
530
+
await transformed.text();
531
+
532
+
if (bestHref) {
533
+
try {
534
+
faviconUrl = new URL(bestHref, `https://${domain}/`).href;
535
+
} catch {
536
+
faviconUrl = null;
537
+
}
538
+
}
539
+
}
540
+
} catch {}
541
+
542
+
if (!faviconUrl) {
543
+
faviconUrl = `https://${domain}/favicon.ico`;
544
+
}
545
+
546
+
try {
547
+
const iconRes = await fetch(faviconUrl, {
548
+
signal: AbortSignal.timeout(5000),
549
+
redirect: "follow",
550
+
});
551
+
552
+
if (!iconRes.ok) {
553
+
return new Response("Favicon not found", { status: 404 });
554
+
}
555
+
556
+
const contentType = iconRes.headers.get("content-type") ?? "";
557
+
if (!contentType.includes("image") && !contentType.includes("icon")) {
558
+
return new Response("Not an image", { status: 404 });
559
+
}
560
+
561
+
const contentLength = parseInt(iconRes.headers.get("content-length") ?? "0", 10);
562
+
if (contentLength > MAX_FAVICON_SIZE) {
563
+
return new Response("Favicon too large", { status: 413 });
564
+
}
565
+
566
+
const body = await iconRes.arrayBuffer();
567
+
if (body.byteLength > MAX_FAVICON_SIZE) {
568
+
return new Response("Favicon too large", { status: 413 });
569
+
}
570
+
571
+
return new Response(body, {
572
+
headers: {
573
+
"Content-Type": contentType,
574
+
"Cache-Control": "public, max-age=86400",
575
+
"Access-Control-Allow-Origin": "*",
576
+
},
577
+
});
578
+
} catch {
579
+
return new Response("Failed to fetch favicon", { status: 502 });
580
+
}
581
+
}
582
+
489
583
export default {
490
584
async fetch(request, env) {
491
585
const url = new URL(request.url);
···
493
587
if (url.pathname === "/og-image") {
494
588
return handleOgImage(url.searchParams).catch(
495
589
(err) => new Response(`Failed to generate image: ${err?.message ?? err}`, { status: 500 }),
590
+
);
591
+
}
592
+
593
+
if (url.pathname === "/favicon") {
594
+
return handleFavicon(url.searchParams).catch(
595
+
(err) => new Response(`Failed to fetch favicon: ${err?.message ?? err}`, { status: 500 }),
496
596
);
497
597
}
498
598