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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#include "mozilla/dom/StorageAccessPermissionStatus.h"
#include "PermissionStatusSink.h"
#include "mozilla/AntiTrackingUtils.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/FeaturePolicyUtils.h"
#include "mozilla/dom/PermissionStatus.h"
#include "mozilla/dom/PermissionStatusBinding.h"
#include "mozilla/dom/WindowGlobalChild.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerRef.h"
#include "nsGlobalWindowInner.h"
#include "nsIPermissionManager.h"
namespace mozilla::dom {
class StorageAccessPermissionStatusSink final : public PermissionStatusSink {
Mutex mWorkerRefMutex;
// Protected by mutex.
// Created and released on worker-thread. Used also on main-thread.
RefPtr<WeakWorkerRef> mWeakWorkerRef MOZ_GUARDED_BY(mWorkerRefMutex);
public:
StorageAccessPermissionStatusSink(PermissionStatus* aPermissionStatus,
PermissionName aPermissionName,
const nsACString& aPermissionType)
: PermissionStatusSink(aPermissionStatus, aPermissionName,
aPermissionType),
mWorkerRefMutex("StorageAccessPermissionStatusSink::mWorkerRefMutex") {}
void Init() {
if (!NS_IsMainThread()) {
WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(workerPrivate);
MutexAutoLock lock(mWorkerRefMutex);
mWeakWorkerRef =
WeakWorkerRef::Create(workerPrivate, [self = RefPtr(this)]() {
MutexAutoLock lock(self->mWorkerRefMutex);
self->mWeakWorkerRef = nullptr;
});
}
}
protected:
bool MaybeUpdatedByOnMainThread(nsIPermission* aPermission) override {
return false;
}
bool MaybeUpdatedByNotifyOnlyOnMainThread(
nsPIDOMWindowInner* aInnerWindow) override {
NS_ENSURE_TRUE(aInnerWindow, false);
if (!mPermissionStatus) {
return false;
}
nsCOMPtr<nsPIDOMWindowInner> ownerWindow;
if (mSerialEventTarget->IsOnCurrentThread()) {
ownerWindow = mPermissionStatus->GetOwnerWindow();
} else {
MutexAutoLock lock(mWorkerRefMutex);
if (!mWeakWorkerRef) {
return false;
}
// If we have mWeakWorkerRef, we haven't received the WorkerRef
// notification yet.
WorkerPrivate* workerPrivate = mWeakWorkerRef->GetUnsafePrivate();
MOZ_ASSERT(workerPrivate);
ownerWindow = workerPrivate->GetAncestorWindow();
}
NS_ENSURE_TRUE(ownerWindow, false);
return ownerWindow->WindowID() == aInnerWindow->WindowID();
}
RefPtr<PermissionStatePromise> ComputeStateOnMainThread() override {
if (mSerialEventTarget->IsOnCurrentThread()) {
if (!mPermissionStatus) {
return PermissionStatePromise::CreateAndReject(NS_ERROR_FAILURE,
__func__);
}
nsGlobalWindowInner* window = mPermissionStatus->GetOwnerWindow();
if (NS_WARN_IF(!window)) {
return PermissionStatePromise::CreateAndReject(NS_ERROR_FAILURE,
__func__);
}
WindowGlobalChild* wgc = window->GetWindowGlobalChild();
if (NS_WARN_IF(!wgc)) {
return PermissionStatePromise::CreateAndReject(NS_ERROR_FAILURE,
__func__);
}
// Perform a Permission Policy Request
if (!FeaturePolicyUtils::IsFeatureAllowed(window->GetExtantDoc(),
u"storage-access"_ns)) {
return PermissionStatePromise::CreateAndResolve(
nsIPermissionManager::PROMPT_ACTION, __func__);
}
return wgc->SendGetStorageAccessPermission(false)->Then(
GetMainThreadSerialEventTarget(), __func__,
[self = RefPtr(this)](uint32_t aAction) {
// We never reveal PermissionState::Denied here
return PermissionStatePromise::CreateAndResolve(
aAction == nsIPermissionManager::ALLOW_ACTION
? aAction
: nsIPermissionManager::PROMPT_ACTION,
__func__);
},
[](mozilla::ipc::ResponseRejectReason aError) {
return PermissionStatePromise::CreateAndReject(NS_ERROR_FAILURE,
__func__);
});
}
// For workers we already have the correct value in workerPrivate.
return InvokeAsync(mSerialEventTarget, __func__, [self = RefPtr(this)] {
if (!self->mPermissionStatus) {
return PermissionStatePromise::CreateAndReject(NS_ERROR_FAILURE,
__func__);
}
WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(workerPrivate);
return PermissionStatePromise::CreateAndResolve(
workerPrivate->StorageAccess() == StorageAccess::eAllow
? nsIPermissionManager::ALLOW_ACTION
: nsIPermissionManager::PROMPT_ACTION,
__func__);
});
}
};
StorageAccessPermissionStatus::StorageAccessPermissionStatus(
nsIGlobalObject* aGlobal)
: PermissionStatus(aGlobal, PermissionName::Storage_access) {}
already_AddRefed<PermissionStatusSink>
StorageAccessPermissionStatus::CreateSink() {
RefPtr<StorageAccessPermissionStatusSink> sink =
new StorageAccessPermissionStatusSink(this, Name(), GetPermissionType());
sink->Init();
return sink.forget();
}
} // namespace mozilla::dom
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