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/*
* Copyright (C) 2025 Shopify Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <WebCore/CachedResourceClient.h>
#include <WebCore/CachedResourceHandle.h>
#include <optional>
#include <wtf/CompletionHandler.h>
#include <wtf/Forward.h>
#include <wtf/HashMap.h>
#include <wtf/URLHash.h>
namespace WebCore {
class CachedRawResource;
class DocumentLoader;
class FrameLoader;
class ResourceRequest;
enum class ReferrerPolicy : uint8_t;
class DocumentPrefetcher : public RefCounted<DocumentPrefetcher>, public CachedRawResourceClient {
public:
struct PrefetchedResourceData {
// The resource needs to be here in order to be kept alive.
CachedResourceHandle<CachedRawResource> resource;
Box<NetworkLoadMetrics> metrics;
};
static Ref<DocumentPrefetcher> create(FrameLoader& frameLoader) { return adoptRef(*new DocumentPrefetcher(frameLoader)); }
~DocumentPrefetcher();
// CachedResourceClient.
void ref() const final { RefCounted::ref(); }
void deref() const final { RefCounted::deref(); }
void prefetch(const URL&, const Vector<String>& tags, std::optional<ReferrerPolicy>, bool lowPriority = false);
bool wasPrefetched(const URL&) const;
Box<NetworkLoadMetrics> takePrefetchedNetworkLoadMetrics(const URL&);
// CachedRawResourceClient
void responseReceived(const CachedResource&, const ResourceResponse&, CompletionHandler<void()>&&) override;
void notifyFinished(CachedResource&, const NetworkLoadMetrics&, LoadWillContinueInAnotherProcess = LoadWillContinueInAnotherProcess::No) override;
CachedResourceClientType resourceClientType() const override { return RawResourceType; }
private:
explicit DocumentPrefetcher(FrameLoader&);
WeakRef<FrameLoader> m_frameLoader;
HashMap<URL, PrefetchedResourceData> m_prefetchedData;
};
} // namespace WebCore
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