2569718930@qq.com
107 lines
2.9 KiB
TypeScript
107 lines
2.9 KiB
TypeScript
export type ProxyCachePolicy = {
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fetchMode: "no-store" | "revalidate";
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responseCacheControl: string;
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revalidateSeconds?: number;
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};
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export const NO_STORE_CACHE_CONTROL = "no-store, max-age=0";
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export const CLOUDFLARE_EDGE_TTL_SEC = {
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cityDetail: 60,
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cityDetailStale: 300,
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cityList: 300,
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cityListStale: 3600,
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landingPage: 600,
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scanTerminal: 300,
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scanTerminalStale: 900,
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staticAsset: 31536000,
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systemStatus: 60,
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} as const;
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export function buildPublicEdgeCacheControl(
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sMaxageSeconds: number,
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staleWhileRevalidateSeconds = Math.max(sMaxageSeconds * 3, 30),
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browserMaxAgeSeconds = 0,
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) {
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return [
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"public",
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`max-age=${Math.max(0, Math.floor(browserMaxAgeSeconds))}`,
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`s-maxage=${Math.max(1, Math.floor(sMaxageSeconds))}`,
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`stale-while-revalidate=${Math.max(0, Math.floor(staleWhileRevalidateSeconds))}`,
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].join(", ");
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}
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export function isForceRefreshValue(value: string | null | undefined) {
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return String(value || "").trim().toLowerCase() === "true";
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}
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export function buildForceRefreshProxyCachePolicy(
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forceRefresh: string | null | undefined,
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revalidateSeconds: number = CLOUDFLARE_EDGE_TTL_SEC.scanTerminal,
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): ProxyCachePolicy {
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if (isForceRefreshValue(forceRefresh)) {
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return {
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fetchMode: "no-store",
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responseCacheControl: NO_STORE_CACHE_CONTROL,
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};
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}
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return {
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fetchMode: "revalidate",
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responseCacheControl: buildPublicEdgeCacheControl(
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revalidateSeconds,
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Math.max(revalidateSeconds * 3, CLOUDFLARE_EDGE_TTL_SEC.scanTerminalStale),
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),
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revalidateSeconds,
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};
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}
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export function buildCityDetailProxyCachePolicy(
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forceRefresh: string | null | undefined,
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revalidateSeconds: number = CLOUDFLARE_EDGE_TTL_SEC.cityDetail,
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): ProxyCachePolicy {
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if (isForceRefreshValue(forceRefresh)) {
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return {
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fetchMode: "no-store",
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responseCacheControl: NO_STORE_CACHE_CONTROL,
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};
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}
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return {
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fetchMode: "revalidate",
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responseCacheControl: buildPublicEdgeCacheControl(
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revalidateSeconds,
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Math.max(revalidateSeconds * 3, CLOUDFLARE_EDGE_TTL_SEC.cityDetailStale),
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Math.min(revalidateSeconds, 30),
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),
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revalidateSeconds,
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};
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}
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export function buildCityListCacheControl() {
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return buildPublicEdgeCacheControl(
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CLOUDFLARE_EDGE_TTL_SEC.cityList,
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CLOUDFLARE_EDGE_TTL_SEC.cityListStale,
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);
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}
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export function buildStaticCityListFallbackCacheControl() {
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return buildPublicEdgeCacheControl(
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CLOUDFLARE_EDGE_TTL_SEC.cityList,
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CLOUDFLARE_EDGE_TTL_SEC.cityListStale,
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);
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}
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export function buildScanTerminalResponseCacheControl(
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data: unknown,
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readyCacheControl: string,
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) {
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if (!data || typeof data !== "object") {
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return NO_STORE_CACHE_CONTROL;
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}
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const payload = data as { stale?: unknown; status?: unknown };
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const status = String(payload.status || "").trim().toLowerCase();
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if (payload.stale === true || (status && status !== "ready")) {
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return NO_STORE_CACHE_CONTROL;
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}
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return readyCacheControl;
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}
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