60 lines
1.6 KiB
TypeScript
60 lines
1.6 KiB
TypeScript
import { NextResponse } from "next/server";
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import { lotteryApiOrigin } from "./src/lib/lottery-api-base";
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import { generateCSP, nonCspSecurityHeaders } from "./src/lib/csp-config";
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type RuntimeOriginsEnvelope = {
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code?: number;
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data?: {
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iframe_allowed_origins?: unknown;
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};
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};
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const RUNTIME_ORIGINS_TTL_MS = 60_000;
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let cachedRuntimeOrigins: string[] | null = null;
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let cachedAt = 0;
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async function loadRuntimeOrigins(): Promise<string[]> {
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if (cachedRuntimeOrigins !== null && Date.now() - cachedAt < RUNTIME_ORIGINS_TTL_MS) {
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return cachedRuntimeOrigins;
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}
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try {
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const url = `${lotteryApiOrigin()}/api/v1/integration/runtime-origins`;
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const response = await fetch(url, {
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headers: { Accept: "application/json" },
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cache: "no-store",
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});
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if (!response.ok) return [];
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const payload = (await response.json()) as RuntimeOriginsEnvelope;
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const origins = payload.data?.iframe_allowed_origins;
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if (!Array.isArray(origins)) return [];
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cachedRuntimeOrigins = origins.filter((origin): origin is string => typeof origin === "string");
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cachedAt = Date.now();
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return cachedRuntimeOrigins;
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} catch {
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return cachedRuntimeOrigins ?? [];
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}
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}
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export async function proxy(): Promise<NextResponse> {
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const response = NextResponse.next();
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const runtimeOrigins = await loadRuntimeOrigins();
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response.headers.set("Content-Security-Policy", generateCSP(runtimeOrigins));
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for (const header of nonCspSecurityHeaders) {
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response.headers.set(header.key, header.value);
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}
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return response;
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}
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export const config = {
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matcher: ["/((?!api|_next/static|_next/image|favicon.ico|.*\\..*).*)"],
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};
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