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node_modules/astro/dist/assets/build/remote.js

@@ -0,0 +1,77 @@
+import CachePolicy from "http-cache-semantics";
+async function loadRemoteImage(src) {
+  const req = new Request(src);
+  const res = await fetch(req);
+  if (!res.ok) {
+    throw new Error(
+      `Failed to load remote image ${src}. The request did not return a 200 OK response. (received ${res.status}))`
+    );
+  }
+  const policy = new CachePolicy(webToCachePolicyRequest(req), webToCachePolicyResponse(res));
+  const expires = policy.storable() ? policy.timeToLive() : 0;
+  return {
+    data: Buffer.from(await res.arrayBuffer()),
+    expires: Date.now() + expires,
+    etag: res.headers.get("Etag") ?? void 0,
+    lastModified: res.headers.get("Last-Modified") ?? void 0
+  };
+}
+async function revalidateRemoteImage(src, revalidationData) {
+  const headers = {
+    ...revalidationData.etag && { "If-None-Match": revalidationData.etag },
+    ...revalidationData.lastModified && { "If-Modified-Since": revalidationData.lastModified }
+  };
+  const req = new Request(src, { headers });
+  const res = await fetch(req);
+  if (!res.ok && res.status !== 304) {
+    throw new Error(
+      `Failed to revalidate cached remote image ${src}. The request did not return a 200 OK / 304 NOT MODIFIED response. (received ${res.status} ${res.statusText})`
+    );
+  }
+  const data = Buffer.from(await res.arrayBuffer());
+  if (res.ok && !data.length) {
+    return await loadRemoteImage(src);
+  }
+  const policy = new CachePolicy(
+    webToCachePolicyRequest(req),
+    webToCachePolicyResponse(
+      res.ok ? res : new Response(null, { status: 200, headers: res.headers })
+    )
+    // 304 responses themselves are not cacheable, so just pretend to get the refreshed TTL
+  );
+  const expires = policy.storable() ? policy.timeToLive() : 0;
+  return {
+    data,
+    expires: Date.now() + expires,
+    // While servers should respond with the same headers as a 200 response, if they don't we should reuse the stored value
+    etag: res.headers.get("Etag") ?? (res.ok ? void 0 : revalidationData.etag),
+    lastModified: res.headers.get("Last-Modified") ?? (res.ok ? void 0 : revalidationData.lastModified)
+  };
+}
+function webToCachePolicyRequest({ url, method, headers: _headers }) {
+  let headers = {};
+  try {
+    headers = Object.fromEntries(_headers.entries());
+  } catch {
+  }
+  return {
+    method,
+    url,
+    headers
+  };
+}
+function webToCachePolicyResponse({ status, headers: _headers }) {
+  let headers = {};
+  try {
+    headers = Object.fromEntries(_headers.entries());
+  } catch {
+  }
+  return {
+    status,
+    headers
+  };
+}
+export {
+  loadRemoteImage,
+  revalidateRemoteImage
+};