2569718930@qq.com
5b19a49ffb
1. /api/scan/terminal 返回 Cache-Control: public, s-maxage=30, stale-while-revalidate=120 → pre-warm 期间也能返回缓存，白屏 20s 变 1s 2. 落地页 2s 后静默 prefetch /api/cities，预热后端进程和连接池 3. metadata 加 preconnect api.polyweather.top
38 lines
997 B
TypeScript
38 lines
997 B
TypeScript
"use client";
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import { useEffect } from "react";
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/**
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* Warms the backend cache for public API endpoints while the user reads
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* the landing page, so the first terminal load after login is faster.
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*
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* - /api/cities (public, triggers Python process warmup and connection pool init)
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* - scan terminal (protected — skipped here; prefetched by the terminal
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* component's stagger loading after login)
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*/
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export function PreloadTerminalData() {
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useEffect(() => {
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if (typeof window === "undefined" || typeof fetch !== "function") return;
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const controller = new AbortController();
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// Delay 2s so the landing page critical assets load first
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const t = setTimeout(
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() =>
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fetch("/api/cities", {
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cache: "no-store",
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headers: { Accept: "application/json" },
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signal: controller.signal,
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}).catch(() => {}),
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2000,
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);
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return () => {
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controller.abort();
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clearTimeout(t);
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};
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}, []);
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return null;
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}
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