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node_modules/next/dist/esm/server/lib/clone-response.js

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+const noop = ()=>{};
+let registry;
+if (globalThis.FinalizationRegistry) {
+    registry = new FinalizationRegistry((weakRef)=>{
+        const stream = weakRef.deref();
+        if (stream && !stream.locked) {
+            stream.cancel('Response object has been garbage collected').then(noop);
+        }
+    });
+}
+/**
+ * Clones a response by teeing the body so we can return two independent
+ * ReadableStreams from it. This avoids the bug in the undici library around
+ * response cloning.
+ *
+ * After cloning, the original response's body will be consumed and closed.
+ *
+ * @see https://github.com/vercel/next.js/pull/73274
+ *
+ * @param original - The original response to clone.
+ * @returns A tuple containing two independent clones of the original response.
+ */ export function cloneResponse(original) {
+    // If the response has no body, then we can just return the original response
+    // twice because it's immutable.
+    if (!original.body) {
+        return [
+            original,
+            original
+        ];
+    }
+    const [body1, body2] = original.body.tee();
+    const cloned1 = new Response(body1, {
+        status: original.status,
+        statusText: original.statusText,
+        headers: original.headers
+    });
+    Object.defineProperty(cloned1, 'url', {
+        value: original.url,
+        // How the original response.url behaves
+        configurable: true,
+        enumerable: true,
+        writable: false
+    });
+    const cloned2 = new Response(body2, {
+        status: original.status,
+        statusText: original.statusText,
+        headers: original.headers
+    });
+    Object.defineProperty(cloned2, 'url', {
+        value: original.url,
+        // How the original response.url behaves
+        configurable: true,
+        enumerable: true,
+        writable: false
+    });
+    // The Fetch Standard allows users to skip consuming the response body by
+    // relying on garbage collection to release connection resources.
+    // https://github.com/nodejs/undici?tab=readme-ov-file#garbage-collection
+    //
+    // To cancel the stream you then need to cancel both resulting branches.
+    // Teeing a stream will generally lock it for the duration, preventing other
+    // readers from locking it.
+    // https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/tee
+    if (registry) {
+        if (cloned1.body) {
+            registry.register(cloned1, new WeakRef(cloned1.body));
+        }
+        if (cloned2.body) {
+            registry.register(cloned2, new WeakRef(cloned2.body));
+        }
+    }
+    return [
+        cloned1,
+        cloned2
+    ];
+}
+
+//# sourceMappingURL=clone-response.js.map