`, 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

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\"?\";\n if (!res.ok) return `HTTP ${res.status} (${ct})`;\n if (ct.startsWith(\"text/html\") || ct.includes(\"json\")) return `HTML (${ct})`;\n const r = res.body?.getReader();\n if (!r) return \"pusty body\";\n await r.read();\n r.releaseLock();\n return `OK ${ct}`;\n } catch (e) {\n return `BŁĄD ${(e as Error).name}`;\n } finally {\n clearTimeout(t);\n }\n}\nfor (const u of tests) {\n process.stdout.write(` ${u.n}... `);\n console.log(await check(u));\n}\n","createdAt",["D",1789321245207],"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","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",{"_104":103,"_112":108},"org",{"_104":103,"_105":106,"_107":108,"_19":60,"_109":110,"_111":32},"branch",{"_13":93,"_38":94,"_48":47,"_95":49,"_96":-5,"_97":-5,"_98":-5,"_99":-5,"_100":-5,"_101":50,"_102":103},"isOwned",89,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","dominik1","handle","displayName","Dominik","avatar","","tier","free","canRestrictVals","profileImageUrl","branchName","adoptOrgId",{"_48":49,"_38":50,"_43":268,"_52":-5,"_53":32,"_54":55,"_56":55,"_57":58,"_59":-5,"_19":60,"_61":62,"_63":30,"_64":-5,"_65":-5,"_66":67,"_68":69,"_70":71,"_72":73,"_74":269,"_76":-5,"_77":78,"_79":78,"_80":81,"_82":81,"_83":81,"_84":78,"_85":78,"_86":270,"_88":271,"_90":272,"_92":32},"tree",[192,198,200,201,202,203],"files",[192,193,194,195,196,197,198,199,200,201,202,203],"counts",{"_182":67,"_183":166,"_184":67,"_185":186,"_187":188},"contents",[134,135,136,137,138,139],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_48":177,"_38":178,"_36":179,"_141":-5,"_46":47,"_45":166,"_142":30,"_43":180,"_13":67,"_39":175,"_41":-5,"_29":32,"_144":-5,"_33":181},{"_48":170,"_38":171,"_36":172,"_141":-5,"_46":47,"_45":173,"_142":30,"_43":174,"_13":67,"_39":175,"_41":-5,"_29":32,"_144":-5,"_33":176},{"_48":163,"_38":164,"_36":165,"_141":-5,"_46":47,"_45":166,"_142":30,"_43":167,"_13":67,"_39":26,"_41":168,"_29":32,"_144":-5,"_33":169},{"_48":155,"_38":156,"_36":157,"_141":-5,"_46":47,"_45":158,"_142":32,"_43":159,"_13":160,"_39":26,"_41":161,"_29":32,"_144":-5,"_33":162},{"_48":146,"_38":147,"_36":62,"_141":-5,"_46":47,"_45":148,"_142":32,"_43":149,"_13":150,"_39":151,"_41":152,"_29":32,"_144":153,"_33":154},{"_48":140,"_38":34,"_36":37,"_141":-5,"_46":47,"_45":14,"_142":32,"_43":143,"_13":67,"_39":40,"_41":42,"_29":32,"_144":-5,"_33":145},"9e63a54a-d9ef-4d55-856c-ff242257c20f","parentId","latest",["D",1789321245207],"label",[34],"0773830d-ec4e-406b-9f2a-1cf1b2ba6cbc","index.ts",22,["D",1789318630107],5,"http","import { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.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// Spis stacji — frontend pobiera z /api/stations (bez adresów strumieni, te\n// idą wyłącznie przez proxy, żeby nie puszczać WAN-owych http wprost do klienta)\napp.get(\"/api/stations\", (c) =>\n c.json(STATIONS.map(({ id, name, desc, short, accent, logo }) => ({ id, name, desc, short, accent, logo })))\n);\n\n// Proxy logotypów: /logo/:id pobiera obraz ze źródła (logo) i oddaje go po\n// https. Jeśli źródła nie ma albo nie jest obrazem → 404 (UI wtedy pokazuje\n// monogram jako fallback).\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 try {\n const up = await fetch(station.logo, {\n headers: { \"User-Agent\": \"Mozilla/5.0 (compatible; ValTownRadio/1.0)\" },\n });\n const ct = up.headers.get(\"content-type\") ?? \"\";\n if (!up.ok || !ct.startsWith(\"image/\")) return c.json({ error: \"Brak logo.\" }, 404);\n return new Response(up.body, {\n status: 200,\n headers: {\n \"Content-Type\": ct,\n \"Cache-Control\": \"public, max-age=86400\",\n },\n });\n } catch {\n return c.json({ error: \"Brak logo.\" }, 404);\n }\n});\n\n// Proxy audio: przeglądarka trafia na HTTPS /stream/:id, a my pobieramy\n// upstream (często czysty HTTP) i przesyłamy jego strumień dalej. Dzięki temu\n// nie ma blokady \"mixed content\", a adresy światowych serwerów są ukryte.\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\n try {\n // User-Agent klienta audio (VLC), nie przeglądarki — niektóre serwery\n // SHOUTcast (np. Polskie Radio) oddają HTML stronie statusu przeglądarce,\n // a strumień audio — 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","radio-pl",[147],"ee731ddf-b816-4838-8846-afc7218d50e2","README.md","01a09ba5-f0b0-766b-99ae-1becdd352fcb",20,["D",1789318511030],3,"# 📻 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",[156],"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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