`, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter

[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_256":257,"_258":259},"routes/_app.x.$handle.$name",{"_99":98,"_32":44,"_108":89,"_27":103,"_13":14,"_109":-5,"_11":110,"_111":112,"_113":114,"_115":116,"_117":118,"_20":-5,"_119":-5,"_120":-5,"_121":25,"_122":123,"_124":58,"_125":-5,"_126":-5,"_127":128},"routes/_app.x.$handle.$name.branch.$branch.version.$version.diff",{"_11":12,"_13":14,"_15":16,"_17":-5,"_18":-5},"project",{"_42":43,"_32":44,"_37":45,"_46":-5,"_47":25,"_48":49,"_50":49,"_51":52,"_53":-5,"_18":54,"_55":56,"_57":58,"_59":-5,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68,"_69":70,"_71":-5,"_72":73,"_74":73,"_75":76,"_77":76,"_78":76,"_79":73,"_80":73,"_81":82,"_83":84,"_85":86,"_87":25},"version",69,"changes",[19],"aiChatInfo","userId",{"_20":21,"_22":23,"_24":25,"_26":25,"_27":28,"_29":28},"file",{"_30":31,"_32":28,"_33":20,"_34":36,"_37":38,"_39":14,"_40":41,"_24":25},"previous",{"_30":31,"_32":28,"_33":20,"_34":35},"deleted",false,"deletedHere","path","README.md","latestPath","fileId","01a09ba5-f0b0-766b-99ae-1becdd352fcb","name","fileType","content","# 📻 Radio PL\n\nMinimalny, mobile-first odtwarzacz polskich stacji radiowych. Klikasz stację — i gra.\nJasna, „redakcyjna” szata (bez kiczu). Zbudowany na Val Town (React + Hono).\n\n## Otwórz: \n\n## Stacje\n\n| Stacja | Format | Status |\n| --- | --- | --- |\n| RMF FM, RMF MAXX, RMF Classic, RMF Chillout, RMF 2 | MP3 | ✅ grają |\n| Radio Nowy Świat | MP3 | ✅ gra |\n| TOK FM | MP3 | ✅ gra |\n| **Radio 357** | AAC | ✅ gra |\n| PR Trójka | AAC (SHOUTcast) | ⚠️ upstream bywa nieosiągalny |\n\n## Jak to działa\n\n```mermaid\ngraph LR\n Browser[Przeglądarka] -->|klik| UI[\"React · frontend/components\"]\n UI -->|GET /api/stations| API[\"Hono · index.ts\"]\n UI -->|audio src /stream/:id| Proxy[\"Proxy audio HTTPS\"]\n Proxy -->|pobiera i przesyła| Upstream[\"Strumień stacji (HTTP)\"]\n```\n\n- **Proxy audio** `/stream/:id` — pobiera upstream (często czysty `http://`) i\n przesyła go po `https://`, więc przeglądarka nie blokuje go jako „mixed content”.\n- **User-Agent** proxy = klient audio (VLC), nie przeglądarka — serwery SHOUTcast\n (jak Polskie Radio) inaczej oddają HTML strony statusu zamiast strumienia.\n- **Lista stacji** — `lib/stations.ts` (zweryfikowana; adresy strumieni nie\n wychodzą do klienta — są tylko po stronie serwera).\n\n## Pliki\n\n```\nindex.ts ← Hono: /api/stations + proxy audio /stream/:id\nlib/stations.ts ← stacje (nazwa, monogram, kolor akcentu, strumień)\nfrontend/\n root.tsx ← HTML shell (jasny motyw, Google Fonts)\n index.tsx ← entrypoint React\n components/App.tsx ← lista stacji + przyklejona belka odtwarzacza\n```\n\nRemix szablonu [`react-hono-starter`](https://www.val.town/x/templates/react-hono-starter).\n","# 📻 Radio PL\n\nMinimalny, mobile-first odtwarzacz polskich stacji radiowych. Klikasz stację — i gra.\nJasna, „redakcyjna” szata (bez kiczu). Zbudowany na Val Town (React + Hono).\n\n## Otwórz: \n\n## Stacje\n\n| Stacja | Format |\n| --- | --- |\n| RMF FM, RMF MAXX, RMF Classic | MP3 (HTTPS) |\n| Trójka | AAC · HLS (hls.js, w Safari natywnie) |\n| Radio Nowy Świat, TOK FM, Eska, Eska 2, Eska Rock, Antyradio, Radio Lublin, Radio ZET | MP3 (HTTPS) |\n| Radio 357 | AAC (HTTPS) |\n\n## Jak to działa\n\n```mermaid\ngraph LR\n Browser[Przeglądarka] -->|klik| UI[\"React · frontend/components\"]\n UI -->|GET /api/stations| API[\"Hono · index.ts\"]\n UI -->|\"audio src (HTTPS, bezpośrednio)\"| Upstream[\"Serwer stacji\"]\n UI -.->|awaryjnie /stream/:id| Proxy[\"Proxy audio\"]\n Proxy -.-> Upstream\n```\n\n- **Odtwarzanie bezpośrednie** — strumienie HTTPS grają wprost z serwerów stacji.\n Wcześniej wszystko szło przez proxy vala (serwer w USA), co dawało zacięcia.\n- **Automatyczne wznawianie** — przy zerwaniu, `ended` albo braku postępu przez\n 10 s odtwarzacz łączy się ponownie (rosnący odstęp, maks. 6 prób). Po 2 nieudanych\n próbach bezpośrednich przełącza się na proxy.\n- **Proxy audio** `/stream/:id` — zapasowe; obsługuje też czysty `http://`\n (bez blokady „mixed content”). User-Agent = VLC, bo serwery SHOUTcast oddają\n przeglądarkom HTML strony statusu zamiast strumienia.\n- **Logotypy** `/logo/:id` — zgrywane raz do blob storage vala; zmiana adresu w\n `lib/stations.ts` automatycznie odświeża kopię. Typ obrazka rozpoznawany po zawartości.\n\n## Pliki\n\n```\nindex.ts ← Hono: /api/stations, /logo/:id, proxy audio /stream/:id\nlib/stations.ts ← stacje (nazwa, monogram, kolor akcentu, strumień)\nfrontend/\n root.tsx ← HTML shell (jasny motyw, Google Fonts)\n index.tsx ← entrypoint React\n components/App.tsx ← lista stacji + przyklejona belka odtwarzacza\n```\n\nRemix szablonu [`react-hono-starter`](https://www.val.town/x/templates/react-hono-starter).\n","createdAt",["D",1789324876655],"branchVersion","branchId","26a9cea8-03a5-4dee-ab96-5b9583a81dac","id","e3e11001-2912-48b9-ac7c-6832ffa544ef","radio-app",["D",1789317738487],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Minimalny mobilny odtwarzacz polskich stacji radiowych","imageUrl","5dd5cdfa-b36a-42e1-a911-81ba86e3b64c","pinnedFileId","01a09ba5-f0b0-766b-99ae-1c7a57d8f892","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a09aab-d118-725d-b44f-c12d328bfdc6","tursoName","e3e11001291248b9ac7c6832ffa544ef","tursoHostname","e3e11001291248b9ac7c6832ffa544ef-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789492268774],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_99":98,"_107":103},"org",{"_99":98,"_100":101,"_102":103,"_18":54,"_104":105,"_106":25},"branch",{"_13":88,"_32":89,"_42":41,"_90":43,"_91":-5,"_92":-5,"_93":-5,"_94":-5,"_95":-5,"_96":44,"_97":98},"isOwned",89,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","dominik1","handle","displayName","Dominik","avatar","","tier","free","canRestrictVals","profileImageUrl","branchName","adoptOrgId",{"_42":43,"_32":44,"_37":251,"_46":-5,"_47":25,"_48":49,"_50":49,"_51":52,"_53":-5,"_18":54,"_55":56,"_57":58,"_59":-5,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68,"_69":252,"_71":-5,"_72":73,"_74":73,"_75":76,"_77":76,"_78":76,"_79":73,"_80":73,"_81":253,"_83":254,"_85":255,"_87":25},"tree",[179,185,187,188,189],"files",[179,180,181,182,183,184,185,186,187,188,189],"counts",{"_169":62,"_170":153,"_171":62,"_172":173,"_174":175},"contents",[129,130,131,132,133],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_42":164,"_32":165,"_30":166,"_136":-5,"_40":41,"_39":153,"_138":58,"_37":167,"_13":62,"_33":162,"_34":-5,"_24":25,"_143":-5,"_27":168},{"_42":157,"_32":158,"_30":159,"_136":-5,"_40":41,"_39":160,"_138":58,"_37":161,"_13":62,"_33":162,"_34":-5,"_24":25,"_143":-5,"_27":163},{"_42":150,"_32":151,"_30":152,"_136":-5,"_40":41,"_39":153,"_138":58,"_37":154,"_13":62,"_33":20,"_34":155,"_24":25,"_143":-5,"_27":156},{"_42":146,"_32":28,"_30":31,"_136":-5,"_40":41,"_39":14,"_138":25,"_37":147,"_13":148,"_33":20,"_34":36,"_24":25,"_143":-5,"_27":149},{"_42":134,"_32":135,"_30":56,"_136":-5,"_40":41,"_39":137,"_138":25,"_37":139,"_13":140,"_33":141,"_34":142,"_24":25,"_143":144,"_27":145},"a3f14060-9270-4916-b1a8-4d7ec742ad1c","index.ts","parentId",66,"latest",["D",1789324761465],13,"http","import { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\nimport { STATIONS } from \"./lib/stations.ts\";\n\nconst app = new Hono();\n\n// Krótki, stabilny skrót tekstu (djb2) — wersja logo w URL-u, żeby po zmianie\n// źródła logo przeglądarka nie trzymała starego obrazka z cache.\nconst shortHash = (s: string) => {\n let h = 5381;\n for (let i = 0; i < s.length; i++) h = ((h * 33) ^ s.charCodeAt(i)) >>> 0;\n return h.toString(36);\n};\n\n// Rozpoznaje typ obrazka po zawartości. Źródła bywają źle opisane, a przy\n// nosniff przeglądarka nie wyświetli SVG podanego np. jako \"image/*\".\nfunction sniffImageType(b: Uint8Array): string | null {\n if (b[0] === 0x89 && b[1] === 0x50 && b[2] === 0x4e && b[3] === 0x47) return \"image/png\";\n if (b[0] === 0xff && b[1] === 0xd8 && b[2] === 0xff) return \"image/jpeg\";\n if (b[0] === 0x47 && b[1] === 0x49 && b[2] === 0x46) return \"image/gif\";\n if (String.fromCharCode(...b.subarray(0, 4)) === \"RIFF\" && String.fromCharCode(...b.subarray(8, 12)) === \"WEBP\") {\n return \"image/webp\";\n }\n const head = new TextDecoder().decode(b.subarray(0, 2048)).toLowerCase();\n if (head.includes(\"\n c.json(\n STATIONS.map(({ id, name, desc, short, accent, logo, bg, stream, hls }) => ({\n id,\n name,\n desc,\n short,\n accent,\n logo,\n bg,\n logoV: logo ? shortHash(logo) : null,\n src: stream.startsWith(\"https://\") ? stream : null,\n hls: !!hls,\n })),\n )\n);\n\n// Proxy logotypów z self-hostem: /logo/:id pobiera obraz ze źródła (logo) przy\n// pierwszym wejściu i ZAPISUJE go w storage vala. Odtąd serwujemy z własnego\n// storage — niezależnie od źródła (Cloudflare, rotujące timestampy itd.).\n// Zmiana adresu logo w lib/stations.ts unieważnia zapisaną kopię (meta.src).\n// Jeśli logo brak lub nie udało się pobrać → 404 (UI pokazuje wordmark).\napp.get(\"/logo/:id\", async (c) => {\n const id = c.req.param(\"id\");\n const station = STATIONS.find((s) => s.id === id);\n if (!station?.logo) return c.json({ error: \"Brak logo.\" }, 404);\n\n const key = `logo:${id}`;\n const metaKey = `logo-meta:${id}`;\n const headers = (ct: string) => ({ \"Content-Type\": ct, \"Cache-Control\": \"public, max-age=86400\" });\n\n try {\n // 1) Już zgrane z tego samego źródła? Serwuj ze storage vala.\n try {\n const meta = await blob.getJSON<{ ct?: string; src?: string } | undefined>(metaKey);\n if (meta?.ct && meta.src === station.logo) {\n const res = await blob.get(key);\n if (res && res.ok) return new Response(await res.arrayBuffer(), { headers: headers(meta.ct) });\n }\n } catch {\n /* brak zgranego — pobierz ze źródła */\n }\n\n // 2) Pierwszy raz (albo zmienione źródło) — pobierz ze źródła.\n const up = await fetch(station.logo, {\n headers: {\n \"User-Agent\": \"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0 Safari/537.36\",\n \"Accept\": \"image/avif,image/webp,image/png,image/svg+xml,image/*,*/*;q=0.8\",\n \"Referer\": new URL(station.logo).origin + \"/\",\n },\n });\n if (!up.ok) return c.json({ error: \"Brak logo.\" }, 404);\n const buf = new Uint8Array(await up.arrayBuffer());\n const upCt = up.headers.get(\"content-type\")?.split(\";\")[0].trim() ?? \"\";\n const ct = sniffImageType(buf) ?? (upCt.startsWith(\"image/\") && upCt !== \"image/*\" ? upCt : null);\n if (!ct) return c.json({ error: \"Brak logo.\" }, 404);\n\n // Zgarnij do siebie (najpierw obraz, potem meta) — błąd w cache NIE może zepsuć odpowiedzi.\n try {\n await blob.set(key, buf);\n await blob.setJSON(metaKey, { ct, src: station.logo });\n } catch {\n /* cache po cichu pomijamy — nadal serwujemy obrazek */\n }\n\n return new Response(buf, { headers: headers(ct) });\n } catch {\n return c.json({ error: \"Brak logo.\" }, 404);\n }\n});\n\n// Proxy audio (zapasowe): przeglądarka trafia na HTTPS /stream/:id, a my pobieramy\n// upstream i przesyłamy jego strumień dalej. Używane dla strumieni po czystym HTTP\n// i awaryjnie, gdy bezpośrednie połączenie z serwerem stacji się nie udaje.\napp.get(\"/stream/:id\", async (c) => {\n const id = c.req.param(\"id\");\n const station = STATIONS.find((s) => s.id === id);\n if (!station) return c.json({ error: \"Nieznana stacja.\" }, 404);\n if (station.hls) return c.json({ error: \"Stacja HLS — odtwarzana bezpośrednio, bez proxy.\" }, 400);\n\n try {\n // User-Agent klienta audio (VLC), nie przeglądarki — niektóre serwery\n // SHOUTcast oddają przeglądarce HTML strony statusu, a strumień audio\n // — wyłącznie \"odtwarzaczom\".\n const upstream = await fetch(station.stream, {\n headers: {\n \"User-Agent\": \"VLC/3.0.18 LibVLC/3.0.18\",\n },\n });\n if (!upstream.ok || !upstream.body) {\n return c.json({ error: `Stacja chwilowo niedostępna (${upstream.status}).` }, 502);\n }\n // Przekazujemy strumień audio jako body odpowiedzi\n return new Response(upstream.body, {\n status: upstream.status,\n headers: {\n \"Content-Type\": upstream.headers.get(\"content-type\") ?? \"audio/mpeg\",\n \"Cache-Control\": \"no-cache\",\n \"X-Accel-Buffering\": \"no\",\n },\n });\n } catch {\n return c.json({ error: \"Nie udało się połączyć ze stacją.\" }, 502);\n }\n});\n\n// Serve the (never-cached) HTML shell at the root /\napp.get(\"/\", (c) => c.html(Root()));\n\n// Serve frontend files at the version-addressed URLs Root() stamps, cached immutably\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\n\n// View source redirect\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\n\n// Unwrap and rethrow Hono errors as the original error\napp.onError((err) => Promise.reject(err));\n\n// HTTP vals expect an exported \"fetch handler\"\nexport default app.fetch;\n","label","radio-pl",[135],"9350be26-f217-481e-8d81-8a315975f597",["D",1789324876655],4,[28],"b0a8eb41-6bfe-4c12-ab32-41c3780b4f4d","CHANGELOG.md","01a09ba5-f0b0-766b-99ae-14a493a1cbdf",1,["D",1789317738487],"# Changelog\n\n## 2026-07-30 — Immutable asset caching\n\nFrontend files are now served at version-addressed URLs\n(`/__immutable/45/frontend/index.tsx`) with\n`Cache-Control: public, max-age=31536000, immutable`, so repeat visits load the\nwhole client graph from the browser cache — roughly 3× faster (~665ms → ~157ms\nmeasured). Publishing your val bumps its version, which changes every URL, so\ncaches invalidate automatically. Old-version URLs return 404 after a publish\n(like Next.js build assets); a reload picks up the new version.\n\nWhat changed in the template:\n\n- `frontend/index.html` → [`frontend/root.tsx`](/frontend/root.tsx): the HTML\n shell is now JSX and stamps asset URLs with `immutableFileUrl()`\n- [`index.ts`](/index.ts): serves `Root()` at `/`, and one\n `app.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path))` route\n serves all frontend files\n\n### Upgrading an existing remix\n\nYour copy of this template doesn't update automatically. Two options:\n\n**Minimal (most of the benefit):** point both routes at `serveImmutableFile` —\nyour existing bare URLs redirect into versioned space, the new route serves\nthem, and the whole module graph gets cached (costs one redirect per page view):\n\n```ts\nimport { serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\n\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/frontend/**/*\", (c) => serveImmutableFile(c.req.path)); // was serveFile\n```\n\n**Full upgrade (also removes the redirect):** three self-contained steps —\nno other files needed. Adjust the ``, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter\n

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