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https://repo.dactyloidae.xyz/Dactyloidae/UXP.git
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14c84e22a9
This is a stub implementation because of the considerable abuse risk and bad web code risk causing DoS, e.g. when using bad timeout values and callbacks on the AbortSignal (e.g. recursive). Considering the abort-ability of these signals otherwise there is never a guarantee to websites that these signals will be triggered anyway, so it should be considered an optional signal - meaning we can safely just ignore the timeout, which allows us to avoid a ton of complexity and potential sec/privacy issues. Primary use in the wild seems to be detailed profiling/ad metrics anyway; we don't really want to encourage that!
76 lines
1.7 KiB
C++
76 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_AbortSignal_h
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#define mozilla_dom_AbortSignal_h
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#include "mozilla/DOMEventTargetHelper.h"
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namespace mozilla {
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namespace dom {
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class AbortSignal;
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class AbortSignal final : public DOMEventTargetHelper
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{
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public:
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// This class must be implemented by objects who want to follow a AbortSignal.
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class Follower
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{
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public:
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virtual void Aborted() = 0;
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protected:
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virtual ~Follower();
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void
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Follow(AbortSignal* aSignal);
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void
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Unfollow();
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RefPtr<AbortSignal> mFollowingSignal;
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};
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AbortSignal, DOMEventTargetHelper)
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AbortSignal(nsIGlobalObject* aGlobalObject, bool aAborted);
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explicit AbortSignal(bool aAborted);
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JSObject*
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WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
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bool
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Aborted() const;
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void Abort();
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void Timeout();
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IMPL_EVENT_HANDLER(abort);
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IMPL_EVENT_HANDLER(timeout);
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static already_AddRefed<AbortSignal> Abort(GlobalObject& aGlobal);
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static already_AddRefed<AbortSignal> Timeout(GlobalObject& aGlobal, uint64_t aMilliseconds);
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void
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AddFollower(Follower* aFollower);
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void
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RemoveFollower(Follower* aFollower);
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private:
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~AbortSignal() = default;
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// Raw pointers. Follower unregisters itself in the DTOR.
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nsTArray<Follower*> mFollowers;
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bool mAborted;
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};
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} // dom namespace
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} // mozilla namespace
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#endif // mozilla_dom_AbortSignal_h
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