Cache Validation

import { CacheValidator } from "feedstock";

const validator = new CacheValidator({ timeout: 10_000 });

const result = await validator.validate(
  "https://example.com/page",
  cachedEtag,        // from previous response
  cachedLastModified, // from previous response
);

if (result.fresh) {
  // Cache is still valid, use cached content
} else {
  // Content has changed, re-crawl
}

interface CacheValidationResult {
  fresh: boolean;            // true if cache is still valid
  etag: string | null;       // new or existing ETag
  lastModified: string | null; // new or existing Last-Modified
}