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Try again in a minute.\" }, 429);\n }\n } catch {\n console.error(\"Rate limit check failed, proceeding.\");\n }\n\n // City validation\n const urlObj = new URL(req.url);\n const rawCity = urlObj.searchParams.get(\"city\")?.trim();\n\n if (!rawCity) {\n return json({ error: \"Missing 'city' parameter. Usage: ?city=London\" }, 400);\n }\n\n if (!CITY_REGEX.test(rawCity)) {\n return json({ error: \"Invalid city name.\" }, 400);\n }\n\n const city = rawCity.toLowerCase().trim();\n\n // Cache check\n try {\n const cached = await getCached(redis, city);\n if (cached) {\n return json(cached as object, 200, { \"X-Cache\": \"HIT\" });\n }\n } catch {\n console.error(\"Cache read failed, proceeding to fetch.\");\n }\n\n // Fetch weather\n try {\n const { data, status } = await fetchWeather(rawCity, env.OPENWEATHER_API_KEY);\n\n if (status !== 200) {\n const { error, httpStatus } = mapWeatherError(status);\n return json({ error }, httpStatus);\n }\n\n setCache(redis, city, data).catch(() => console.error(\"Cache write failed.\"));\n\n return json(data, 200, { \"X-Cache\": \"MISS\" });\n } catch {\n return json({ error: \"Failed to reach weather service.\" }, 502);\n }\n}",[],[166,185,193],[166,185],{"_107":204,"_100":205,"_167":206,"_169":168,"_170":152,"_171":172,"_173":174,"_109":207,"_104":33,"_176":198,"_178":208,"_179":22,"_180":-5,"_181":209,"_103":210},"4dfbba5a-2052-11f1-a6eb-42dde27851f2","config.ts","4dfbbb36-2052-11f1-a6eb-42dde27851f2",["D",1773567329280],"export const RATE_LIMIT = 10; // requests\nexport const RATE_WINDOW_SEC = 60; // per minute\nexport const CACHE_TTL_SEC = 60 * 30; // 30 minutes\nexport const ALLOWED_METHODS = [\"GET\"];\nexport const CITY_REGEX = /^[a-zA-Z\\s\\-,.']{1,100}$/;",[],[166,205],{"_107":212,"_100":213,"_167":214,"_169":168,"_170":152,"_171":172,"_173":174,"_109":215,"_104":33,"_176":198,"_178":216,"_179":22,"_180":-5,"_181":217,"_103":218},"4dfbc90a-2052-11f1-a6eb-42dde27851f2","env.ts","4dfbc9b4-2052-11f1-a6eb-42dde27851f2",["D",1773567329280],"export interface Env {\n OPENWEATHER_API_KEY: string;\n UPSTASH_URL: string;\n UPSTASH_TOKEN: string;\n}\n\nexport function getEnv(): Env | null {\n const OPENWEATHER_API_KEY = Deno.env.get(\"OPENWEATHER_API_KEY\");\n const UPSTASH_URL = Deno.env.get(\"UPSTASH_URL\");\n const UPSTASH_TOKEN = Deno.env.get(\"UPSTASH_TOKEN\");\n\n if (!OPENWEATHER_API_KEY || !UPSTASH_URL || !UPSTASH_TOKEN) return null;\n\n return { OPENWEATHER_API_KEY, UPSTASH_URL, UPSTASH_TOKEN };\n}",[],[166,213],{"_107":220,"_100":221,"_167":222,"_169":168,"_170":152,"_171":172,"_173":174,"_109":223,"_104":33,"_176":198,"_178":224,"_179":22,"_180":-5,"_181":225,"_103":226},"4dfbd814-2052-11f1-a6eb-42dde27851f2","http.ts","4dfbd8be-2052-11f1-a6eb-42dde27851f2",["D",1773567329280],"export function corsHeaders(): Record {\n return {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"GET, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type\",\n \"Content-Type\": \"application/json\",\n };\n}\n\nexport function json(\n body: object,\n status = 200,\n extra: Record = {},\n): Response {\n return new Response(JSON.stringify(body), {\n status,\n headers: { ...corsHeaders(), ...extra },\n });\n}",[],[166,221],{"_107":228,"_100":229,"_167":230,"_169":168,"_170":152,"_171":172,"_173":174,"_109":231,"_104":33,"_176":198,"_178":232,"_179":22,"_180":-5,"_181":233,"_103":234},"4dfbddf0-2052-11f1-a6eb-42dde27851f2","redis.ts","4dfbde90-2052-11f1-a6eb-42dde27851f2",["D",1773567329280],"import { Redis } from \"npm:@upstash/redis@1.34.0\";\nimport { CACHE_TTL_SEC, RATE_LIMIT, RATE_WINDOW_SEC } from \"./config.ts\";\n\nexport function getRedis(url: string, token: string): Redis {\n return new Redis({ url, token });\n}\n\nexport async function isRateLimited(\n redis: Redis,\n ip: string,\n): Promise {\n const key = `rl:${ip}`;\n const count = await redis.incr(key);\n if (count === 1) {\n await redis.expire(key, RATE_WINDOW_SEC);\n }\n return count > RATE_LIMIT;\n}\n\nexport async function getCached(\n redis: Redis,\n city: string,\n): Promise

Key	Description
UPSTASH_TOKEN	UPSTASH_REDIS_REST_TOKEN
UPSTASH_URL	UPSTASH_REDIS_REST_URL
OPENWEATHER_API_KEY	OpenWeather API Key

TabQuest

weatherAPI

Environment variables