zv/wtr
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

feat: prefer IMGW ALARO forecast data

Browse Source
This commit is contained in:
zv
2026-06-02 20:23:55 +02:00
parent ad4248efdf
commit b97a1cf1ea
11 changed files with 371 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
app/api/forecast/route.ts
View File

@@ -1,6 +1,13 @@
import { NextResponse } from "next/server";
import { mergeForecastSources } from "@/lib/forecast-merge";
import type { RawImgwForecastResponse, RawWeatherForecast } from "@/types/forecast";
const FORECAST_URL = "https://api.open-meteo.com/v1/forecast";
const OPEN_METEO_FORECAST_URL = "https://api.open-meteo.com/v1/forecast";
const IMGW_FORECAST_URL = "https://meteo.imgw.pl/api/v1/forecast/fcapi";
// This browser token is published by the official meteo.imgw.pl frontend.
const IMGW_FORECAST_TOKEN = "p4DXKjsYadfBV21TYrDk";
const OPEN_METEO_TIMEOUT_MS = 12_000;
const IMGW_TIMEOUT_MS = 5_000;
function parseCoordinate(value: string | null, min: number, max: number) {
if (!value?.trim()) return null;
@@ -8,6 +15,15 @@ function parseCoordinate(value: string | null, min: number, max: number) {
return Number.isFinite(coordinate) && coordinate >= min && coordinate <= max ? coordinate : null;
}
async function readImgwPayload(response: Response | null) {
if (!response?.ok) return null;
try {
return await response.json() as RawImgwForecastResponse;
} catch {
return null;
}
}
export async function GET(request: Request) {
const { searchParams } = new URL(request.url);
const latitude = parseCoordinate(searchParams.get("latitude"), -90, 90);
@@ -16,7 +32,7 @@ export async function GET(request: Request) {
return NextResponse.json({ error: "Invalid coordinates." }, { status: 400 });
}
const params = new URLSearchParams({
const openMeteoParams = new URLSearchParams({
latitude: String(latitude),
longitude: String(longitude),
hourly: "temperature_2m,apparent_temperature,precipitation_probability,precipitation,weather_code,wind_speed_10m",
@@ -25,11 +41,22 @@ export async function GET(request: Request) {
forecast_days: "7",
wind_speed_unit: "ms",
});
const imgwParams = new URLSearchParams({
token: IMGW_FORECAST_TOKEN,
lat: String(latitude),
lon: String(longitude),
m: "alaro",
});
try {
const response = await fetch(`${FORECAST_URL}?${params}`, { next: { revalidate: 900 } });
if (!response.ok) return NextResponse.json({ error: "Forecast service is unavailable." }, { status: 502 });
return NextResponse.json(await response.json(), {
const [openMeteoResponse, imgwResponse] = await Promise.all([
fetch(`${OPEN_METEO_FORECAST_URL}?${openMeteoParams}`, { next: { revalidate: 900 }, signal: AbortSignal.timeout(OPEN_METEO_TIMEOUT_MS) }),
fetch(`${IMGW_FORECAST_URL}?${imgwParams}`, { next: { revalidate: 900 }, signal: AbortSignal.timeout(IMGW_TIMEOUT_MS) }).catch(() => null),
]);
if (!openMeteoResponse.ok) return NextResponse.json({ error: "Forecast service is unavailable." }, { status: 502 });
const openMeteoPayload = await openMeteoResponse.json() as RawWeatherForecast;
const imgwPayload = await readImgwPayload(imgwResponse);
return NextResponse.json(mergeForecastSources(openMeteoPayload, imgwPayload), {
headers: { "Cache-Control": "public, s-maxage=900, stale-while-revalidate=1800" },
});
} catch {