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/*
* Copyright (C) 2011 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_LINK_LOADER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_LINK_LOADER_H_
#include "base/optional.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/html/link_rel_attribute.h"
#include "third_party/blink/renderer/core/loader/link_loader_client.h"
#include "third_party/blink/renderer/core/script/modulator.h"
#include "third_party/blink/renderer/platform/cross_origin_attribute_value.h"
#include "third_party/blink/renderer/platform/loader/fetch/fetch_parameters.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource.h"
#include "third_party/blink/renderer/platform/prerender_client.h"
namespace blink {
class Document;
class LinkHeader;
class LocalFrame;
class NetworkHintsInterface;
class PrerenderHandle;
class Resource;
enum class ResourceType : uint8_t;
struct ViewportDescriptionWrapper;
// The parameter object for LinkLoader::LoadLink().
struct LinkLoadParameters {
LinkLoadParameters(const LinkRelAttribute& rel,
const CrossOriginAttributeValue& cross_origin,
const String& type,
const String& as,
const String& media,
const String& nonce,
const String& integrity,
const String& importance,
network::mojom::ReferrerPolicy referrer_policy,
const KURL& href,
const String& image_srcset,
const String& image_sizes)
: rel(rel),
cross_origin(cross_origin),
type(type),
as(as),
media(media),
nonce(nonce),
integrity(integrity),
importance(importance),
referrer_policy(referrer_policy),
href(href),
image_srcset(image_srcset),
image_sizes(image_sizes) {}
LinkLoadParameters(const LinkHeader&, const KURL& base_url);
LinkRelAttribute rel;
CrossOriginAttributeValue cross_origin;
String type;
String as;
String media;
String nonce;
String integrity;
String importance;
network::mojom::ReferrerPolicy referrer_policy;
KURL href;
String image_srcset;
String image_sizes;
};
// The LinkLoader can load link rel types icon, dns-prefetch, prefetch, and
// prerender.
class CORE_EXPORT LinkLoader final : public SingleModuleClient,
public PrerenderClient {
USING_GARBAGE_COLLECTED_MIXIN(LinkLoader);
public:
static LinkLoader* Create(LinkLoaderClient* client) {
return MakeGarbageCollected<LinkLoader>(client,
client->GetLoadingTaskRunner());
}
LinkLoader(LinkLoaderClient*, scoped_refptr<base::SingleThreadTaskRunner>);
~LinkLoader() override;
// from PrerenderClient
void DidStartPrerender() override;
void DidStopPrerender() override;
void DidSendLoadForPrerender() override;
void DidSendDOMContentLoadedForPrerender() override;
void Abort();
bool LoadLink(const LinkLoadParameters&,
Document&,
const NetworkHintsInterface&);
void LoadStylesheet(const LinkLoadParameters&,
const AtomicString&,
const WTF::TextEncoding&,
FetchParameters::DeferOption,
Document&,
ResourceClient*);
void DispatchLinkLoadingErroredAsync();
enum CanLoadResources {
kOnlyLoadResources,
kDoNotLoadResources,
kLoadResourcesAndPreconnect
};
// Media links cannot be preloaded until the first chunk is parsed. The rest
// can be preloaded at commit time.
enum MediaPreloadPolicy { kLoadAll, kOnlyLoadNonMedia, kOnlyLoadMedia };
static void LoadLinksFromHeader(const String& header_value,
const KURL& base_url,
LocalFrame&,
Document*, // can be nullptr
const NetworkHintsInterface&,
CanLoadResources,
MediaPreloadPolicy,
ViewportDescriptionWrapper*);
static base::Optional<ResourceType> GetResourceTypeFromAsAttribute(
const String& as);
Resource* GetResourceForTesting();
void Trace(blink::Visitor*) override;
private:
class FinishObserver;
void NotifyFinished();
// SingleModuleClient implementation
void NotifyModuleLoadFinished(ModuleScript*) override;
Member<FinishObserver> finish_observer_;
Member<LinkLoaderClient> client_;
Member<PrerenderHandle> prerender_;
};
} // namespace blink
#endif