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Diffstat (limited to '')
-rw-r--r-- | uriloader/preload/PreloadService.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/uriloader/preload/PreloadService.h b/uriloader/preload/PreloadService.h new file mode 100644 index 0000000000..d785fd0ae5 --- /dev/null +++ b/uriloader/preload/PreloadService.h @@ -0,0 +1,135 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef PreloadService_h__ +#define PreloadService_h__ + +#include "nsIContentPolicy.h" +#include "nsIURI.h" +#include "nsRefPtrHashtable.h" +#include "mozilla/PreloadHashKey.h" + +class nsINode; + +namespace mozilla { + +class PreloaderBase; + +namespace dom { + +class HTMLLinkElement; +class Document; +enum class ReferrerPolicy : uint8_t; + +} // namespace dom + +/** + * Intended to scope preloads and speculative loads under one roof. This class + * is intended to be a member of dom::Document. Provides registration of + * speculative loads via a `key` which is defined to consist of the URL, + * resource type, and resource-specific attributes that are further + * distinguishing loads with otherwise same type and url. + */ +class PreloadService { + public: + explicit PreloadService(dom::Document*); + ~PreloadService(); + + // Called by resource loaders to register a running resource load. This is + // called for a speculative load when it's started the first time, being it + // either regular speculative load or a preload. + // + // Returns false and does nothing if a preload is already registered under + // this key, true otherwise. + bool RegisterPreload(const PreloadHashKey& aKey, PreloaderBase* aPreload); + + // Called when the load is about to be cancelled. Exact behavior is to be + // determined yet. + void DeregisterPreload(const PreloadHashKey& aKey); + + // Called when the scope is to go away. + void ClearAllPreloads(); + + // True when there is a preload registered under the key. + bool PreloadExists(const PreloadHashKey& aKey); + + // Returns an existing preload under the key or null, when there is none + // registered under the key. + already_AddRefed<PreloaderBase> LookupPreload( + const PreloadHashKey& aKey) const; + + void SetSpeculationBase(nsIURI* aURI) { mSpeculationBaseURI = aURI; } + already_AddRefed<nsIURI> GetPreloadURI(const nsAString& aURL); + + already_AddRefed<PreloaderBase> PreloadLinkElement( + dom::HTMLLinkElement* aLink, nsContentPolicyType aPolicyType); + + // a non-zero aEarlyHintPreloaderId tells this service that a preload for this + // link was started by the EarlyHintPreloader and the preloaders should + // connect back by setting earlyHintPreloaderId in nsIChannelInternal before + // AsyncOpen. + void PreloadLinkHeader(nsIURI* aURI, const nsAString& aURL, + nsContentPolicyType aPolicyType, const nsAString& aAs, + const nsAString& aType, const nsAString& aIntegrity, + const nsAString& aSrcset, const nsAString& aSizes, + const nsAString& aCORS, + const nsAString& aReferrerPolicy, + uint64_t aEarlyHintPreloaderId); + + void PreloadScript(nsIURI* aURI, const nsAString& aType, + const nsAString& aCharset, const nsAString& aCrossOrigin, + const nsAString& aReferrerPolicy, + const nsAString& aIntegrity, bool aScriptFromHead, + uint64_t aEarlyHintPreloaderId); + + void PreloadImage(nsIURI* aURI, const nsAString& aCrossOrigin, + const nsAString& aImageReferrerPolicy, bool aIsImgSet, + uint64_t aEarlyHintPreloaderId); + + void PreloadFont(nsIURI* aURI, const nsAString& aCrossOrigin, + const nsAString& aReferrerPolicy, + uint64_t aEarlyHintPreloaderId); + + void PreloadFetch(nsIURI* aURI, const nsAString& aCrossOrigin, + const nsAString& aReferrerPolicy, + uint64_t aEarlyHintPreloaderId); + + static void NotifyNodeEvent(nsINode* aNode, bool aSuccess); + + void SetEarlyHintUsed() { mEarlyHintUsed = true; } + bool GetEarlyHintUsed() const { return mEarlyHintUsed; } + + private: + dom::ReferrerPolicy PreloadReferrerPolicy(const nsAString& aReferrerPolicy); + nsIURI* BaseURIForPreload(); + + struct PreloadOrCoalesceResult { + RefPtr<PreloaderBase> mPreloader; + bool mAlreadyComplete; + }; + + PreloadOrCoalesceResult PreloadOrCoalesce( + nsIURI* aURI, const nsAString& aURL, nsContentPolicyType aPolicyType, + const nsAString& aAs, const nsAString& aType, const nsAString& aCharset, + const nsAString& aSrcset, const nsAString& aSizes, + const nsAString& aIntegrity, const nsAString& aCORS, + const nsAString& aReferrerPolicy, bool aFromHeader, + uint64_t aEarlyHintPreloaderId); + + private: + nsRefPtrHashtable<PreloadHashKey, PreloaderBase> mPreloads; + + // Raw pointer only, we are intended to be a direct member of dom::Document + dom::Document* mDocument; + + // Set by `nsHtml5TreeOpExecutor::SetSpeculationBase`. + nsCOMPtr<nsIURI> mSpeculationBaseURI; + + bool mEarlyHintUsed = false; +}; + +} // namespace mozilla + +#endif |