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Its news tab was grey placeholder\n * rows. Both come from Yahoo Finance here.\n *\n * Two routes off one val rather than two vals: they share the cache helper\n * and the same failure policy, and the app only has to know one host.\n *\n * / ?symbol=AAPL&range=1M OHLC candles\n * /news ?symbol=AAPL headlines\n */\nimport { blob } from \"https://esm.town/v/std/blob\";\n\ntype Candle = { t: number; o: number; h: number; l: number; c: number };\ntype Story = {\n title: string;\n publisher: string;\n link: string;\n published: number;\n};\n\nconst RANGES: Record = {\n \"1D\": { range: \"1d\", interval: \"5m\" },\n \"1W\": { range: \"5d\", interval: \"30m\" },\n \"1M\": { range: \"1mo\", interval: \"1d\" },\n \"6M\": { range: \"6mo\", interval: \"1d\" },\n \"1Y\": { range: \"1y\", interval: \"1wk\" },\n \"5Y\": { range: \"5y\", interval: \"1mo\" },\n MAX: { range: \"max\", interval: \"3mo\" },\n};\n\nconst UA = { \"User-Agent\": \"Mozilla/5.0\" };\n\n/** Serve from blob while fresh, refetch when stale, fall back when upstream fails. */\nasync function cached(\n key: string,\n ttlMs: number,\n fetcher: () => Promise,\n): Promise<{ value: T; stale: boolean } | null> {\n let hit: { at: number; value: T } | null = null;\n try {\n hit = await blob.getJSON(key);\n } catch { /* nothing stored yet */ }\n\n if (hit && Date.now() - hit.at < ttlMs) return { value: hit.value, stale: false };\n\n try {\n const value = await fetcher();\n await blob.setJSON(key, { at: Date.now(), value });\n return { value, stale: false };\n } catch {\n // Yesterday's data beats an empty screen.\n return hit ? { value: hit.value, stale: true } : null;\n }\n}\n\nasync function fetchCandles(symbol: string, key: string): Promise {\n const { range, interval } = RANGES[key] ?? RANGES[\"1M\"];\n const res = await fetch(\n `https://query1.finance.yahoo.com/v8/finance/chart/${encodeURIComponent(symbol)}` +\n `?range=${range}&interval=${interval}`,\n { headers: UA },\n );\n if (!res.ok) throw new Error(`upstream ${res.status}`);\n const result = (await res.json())?.chart?.result?.[0];\n if (!result) throw new Error(\"no result\");\n\n const stamps: number[] = result.timestamp ?? [];\n const q = result.indicators?.quote?.[0] ?? {};\n const out: Candle[] = [];\n for (let i = 0; i < stamps.length; i++) {\n const o = q.open?.[i], h = q.high?.[i], l = q.low?.[i], c = q.close?.[i];\n // Yahoo pads the arrays with nulls for missing sessions; a candle with a\n // hole in it cannot be drawn, so it is dropped rather than zero-filled —\n // a zero would render as a spike to the floor.\n if (o == null || h == null || l == null || c == null) continue;\n out.push({\n t: stamps[i],\n o: +o.toFixed(4), h: +h.toFixed(4),\n l: +l.toFixed(4), c: +c.toFixed(4),\n });\n }\n // More than a couple of hundred candles is unreadable on a phone, so thin\n // by taking every nth rather than truncating — truncating would show only\n // one end of the period.\n const limit = 180;\n if (out.length <= limit) return out;\n const step = Math.ceil(out.length / limit);\n return out.filter((_, i) => i % step === 0);\n}\n\nasync function fetchNews(symbol: string): Promise {\n const res = await fetch(\n `https://query1.finance.yahoo.com/v1/finance/search` +\n `?q=${encodeURIComponent(symbol)}&newsCount=20"esCount=0`,\n { headers: UA },\n );\n if (!res.ok) throw new Error(`upstream ${res.status}`);\n const items = (await res.json())?.news ?? [];\n return items\n .filter((n: any) => n?.title && n?.link)\n .map((n: any) => ({\n title: String(n.title),\n publisher: String(n.publisher ?? \"\").trim() || \"Market news\",\n link: String(n.link),\n // Yahoo gives seconds; the app wants seconds too, so it is passed\n // through rather than converted twice.\n published: Number(n.providerPublishTime ?? 0),\n }))\n .slice(0, 20);\n}\n\nconst cors = { \"access-control-allow-origin\": \"*\" };\n\nexport default async function (req: Request): Promise {\n const url = new URL(req.url);\n const symbol = (url.searchParams.get(\"symbol\") ?? \"AAPL\").toUpperCase();\n\n if (url.pathname.replace(/\\/+$/, \"\").endsWith(\"/news\")) {\n const got = await cached(`news:${symbol}`, 10 * 60_000, () => fetchNews(symbol));\n if (!got) {\n return Response.json({ symbol, stories: [] }, { status: 502, headers: cors });\n }\n return Response.json(\n { symbol, stories: got.value, stale: got.stale },\n { headers: cors },\n );\n }\n\n const range = (url.searchParams.get(\"range\") ?? \"1M\").toUpperCase();\n const got = await cached(\n `candles:${symbol}:${range}`,\n 60_000,\n () => fetchCandles(symbol, range),\n );\n if (!got) {\n return Response.json({ symbol, range, candles: [] }, { status: 502, headers: cors });\n }\n return Response.json(\n { symbol, range, candles: got.value, stale: got.stale },\n { headers: cors },\n );\n}\n","label",[62],"pulls","branches","forks","envVars",{"_170":20,"_172":20},"connections",{"_170":20,"_171":20},"count","unfilledCount","emptyCount",{"_29":155,"_13":62,"_60":61,"_39":-5,"_31":32,"_156":78,"_157":95,"_33":174,"_35":71,"_63":64,"_159":160,"_65":24,"_161":-5,"_175":176,"_132":177},["D",1788788581817],"children",[],[62],["D",1788788053792],{"_11":12,"_131":68},{"_11":12,"_126":127,"_67":68,"_25":66,"_128":129,"_130":24},{"_35":78,"_13":16,"_29":32,"_118":83,"_119":-5,"_120":-5,"_121":-5,"_122":-5,"_123":-5,"_124":14,"_125":12},"ctx",{"_49":-5,"_151":215,"_216":217,"_218":219,"_220":24,"_221":24,"_222":24,"_223":95,"_224":-5,"_225":-7,"_226":-7,"_227":20,"_228":24,"_229":24,"_230":-5,"_231":24,"_232":24,"_233":24,"_234":-5},"ENV",{"_186":187,"_188":189,"_190":16,"_191":192,"_193":194,"_195":196,"_197":198,"_199":200,"_201":202,"_203":204,"_205":206,"_207":208,"_209":210,"_211":212,"_213":214},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

History