开发AEM Edge功能

// src/handlers/estimated-delivery/handler.js
async function estimatedDeliveryBySkuAndPostcodeHandler(req) {
  const url = new URL(req.url);
  const sku = (url.searchParams.get("sku") ?? DEFAULT_SKU).trim();
  const postcode = (url.searchParams.get("postcode") ?? "").trim();

  if (!postcode) {
    return missingPostcodeError(sku);
  }

  // API 1: catalog lookup
  const product = await getProductBySku(sku);
  if (!product) {
    return unknownSkuError(sku, postcode);
  }

  // API 2: fulfillment lookup
  const fulfillment = await getEstimatedDeliveryByPostcode(postcode);

  return json(buildSuccessResponse(product, fulfillment));
}

// src/mocks/catalog/product-api.js
export async function getProductBySku(sku) {
  await getApiToken(SECRETS.CATALOG);

  // Real API: uncomment and replace with your catalog endpoint.
  // const response = await authorizedFetch(
  //   `https://api.example.com/products?sku=${encodeURIComponent(sku)}`,
  //   SECRETS.CATALOG,
  // );
  // return response.ok ? response.json() : null;

  return PRODUCTS[sku] || null;
}

// src/lib/cors.js
const ALLOWED_ORIGIN_EXACT = new Set([
  "http://localhost:3000",
  "http://127.0.0.1:3000",
]);

function isAllowedOrigin(origin) {
  return Boolean(origin) && ALLOWED_ORIGIN_EXACT.has(origin);
}

function applyCors(request, response) {
  const origin = request.headers.get("Origin");
  if (!isAllowedOrigin(origin)) {
    return response;
  }

  const headers = new Headers(response.headers);
  headers.set("access-control-allow-origin", origin);
  headers.set("vary", "Origin");
  return new Response(response.body, { status: response.status, headers });
}

function corsPreflightResponse(request) {
  const origin = request.headers.get("Origin");
  if (!isAllowedOrigin(origin)) {
    return new Response(null, { status: 403 });
  }

  return new Response(null, {
    status: 204,
    headers: {
      "access-control-allow-origin": origin,
      "access-control-allow-methods": "GET, OPTIONS",
      "access-control-allow-headers": "Content-Type",
      vary: "Origin",
    },
  });
}

export { applyCors, corsPreflightResponse };

// src/index.js
if (url.pathname === "/api/frescopa/estimated-delivery") {
  if (req.method === "OPTIONS") {
    finalResponse = corsPreflightResponse(req);
  } else if (req.method === "GET") {
    finalResponse = await estimatedDeliveryBySkuAndPostcodeHandler(req);
  }
}

finalResponse = applyCors(req, finalResponse);