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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
#ifndef mozilla_dom_serviceworkerprivate_h
#define mozilla_dom_serviceworkerprivate_h
#include <functional>
#include <type_traits>
#include "mozilla/Attributes.h"
#include "mozilla/MozPromise.h"
#include "mozilla/RefPtr.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/dom/FetchService.h"
#include "mozilla/dom/RemoteWorkerController.h"
#include "mozilla/dom/RemoteWorkerTypes.h"
#include "mozilla/dom/ServiceWorkerOpArgs.h"
#include "nsCOMPtr.h"
#include "nsISupportsImpl.h"
#include "nsTArray.h"
#define NOTIFICATION_CLICK_EVENT_NAME u"notificationclick"
#define NOTIFICATION_CLOSE_EVENT_NAME u"notificationclose"
class nsIInterceptedChannel;
class nsIWorkerDebugger;
namespace mozilla {
template <typename T>
class Maybe;
class JSObjectHolder;
namespace dom {
class ClientInfoAndState;
class RemoteWorkerControllerChild;
class ServiceWorkerCloneData;
class ServiceWorkerInfo;
class ServiceWorkerPrivate;
class ServiceWorkerRegistrationInfo;
namespace ipc {
class StructuredCloneData;
} // namespace ipc
class LifeCycleEventCallback : public Runnable {
public:
LifeCycleEventCallback() : Runnable("dom::LifeCycleEventCallback") {}
// Called on the worker thread.
virtual void SetResult(bool aResult) = 0;
};
// Used to keep track of pending waitUntil as well as in-flight extendable
// events. When the last token is released, we attempt to terminate the worker.
class KeepAliveToken final : public nsISupports {
public:
NS_DECL_ISUPPORTS
explicit KeepAliveToken(ServiceWorkerPrivate* aPrivate);
private:
~KeepAliveToken();
RefPtr<ServiceWorkerPrivate> mPrivate;
};
class ServiceWorkerPrivate final : public RemoteWorkerObserver {
friend class KeepAliveToken;
public:
NS_INLINE_DECL_REFCOUNTING(ServiceWorkerPrivate, override);
using PromiseExtensionWorkerHasListener = MozPromise<bool, nsresult, false>;
public:
explicit ServiceWorkerPrivate(ServiceWorkerInfo* aInfo);
nsresult SendMessageEvent(RefPtr<ServiceWorkerCloneData>&& aData,
const ClientInfoAndState& aClientInfoAndState);
// This is used to validate the worker script and continue the installation
// process.
nsresult CheckScriptEvaluation(RefPtr<LifeCycleEventCallback> aCallback);
nsresult SendLifeCycleEvent(const nsAString& aEventType,
RefPtr<LifeCycleEventCallback> aCallback);
nsresult SendPushEvent(const nsAString& aMessageId,
const Maybe<nsTArray<uint8_t>>& aData,
RefPtr<ServiceWorkerRegistrationInfo> aRegistration);
nsresult SendPushSubscriptionChangeEvent();
nsresult SendNotificationEvent(const nsAString& aEventName,
const nsAString& aID, const nsAString& aTitle,
const nsAString& aDir, const nsAString& aLang,
const nsAString& aBody, const nsAString& aTag,
const nsAString& aIcon, const nsAString& aData,
const nsAString& aBehavior,
const nsAString& aScope);
nsresult SendFetchEvent(nsCOMPtr<nsIInterceptedChannel> aChannel,
nsILoadGroup* aLoadGroup, const nsAString& aClientId,
const nsAString& aResultingClientId);
Result<RefPtr<PromiseExtensionWorkerHasListener>, nsresult>
WakeForExtensionAPIEvent(const nsAString& aExtensionAPINamespace,
const nsAString& aEXtensionAPIEventName);
// This will terminate the current running worker thread and drop the
// workerPrivate reference.
// Called by ServiceWorkerInfo when [[Clear Registration]] is invoked
// or whenever the spec mandates that we terminate the worker.
// This is a no-op if the worker has already been stopped.
void TerminateWorker();
void NoteDeadServiceWorkerInfo();
void NoteStoppedControllingDocuments();
void UpdateState(ServiceWorkerState aState);
nsresult GetDebugger(nsIWorkerDebugger** aResult);
nsresult AttachDebugger();
nsresult DetachDebugger();
bool IsIdle() const;
// This promise is used schedule clearing of the owning registrations and its
// associated Service Workers if that registration becomes "unreachable" by
// the ServiceWorkerManager. This occurs under two conditions, which are the
// preconditions to calling this method:
// - The owning registration must be unregistered.
// - The associated Service Worker must *not* be controlling clients.
//
// Additionally, perhaps stating the obvious, the associated Service Worker
// must *not* be idle (whatever must be done "when idle" can just be done
// immediately).
RefPtr<GenericPromise> GetIdlePromise();
void SetHandlesFetch(bool aValue);
RefPtr<GenericPromise> SetSkipWaitingFlag();
static void RunningShutdown() {
// Force a final update of the number of running ServiceWorkers
UpdateRunning(0, 0);
MOZ_ASSERT(sRunningServiceWorkers == 0);
MOZ_ASSERT(sRunningServiceWorkersFetch == 0);
}
/**
* Update Telemetry for # of running ServiceWorkers
*/
static void UpdateRunning(int32_t aDelta, int32_t aFetchDelta);
private:
// Timer callbacks
void NoteIdleWorkerCallback(nsITimer* aTimer);
void TerminateWorkerCallback(nsITimer* aTimer);
void RenewKeepAliveToken();
void ResetIdleTimeout();
void AddToken();
void ReleaseToken();
already_AddRefed<KeepAliveToken> CreateEventKeepAliveToken();
nsresult SpawnWorkerIfNeeded();
~ServiceWorkerPrivate();
nsresult Initialize();
/**
* RemoteWorkerObserver
*/
void CreationFailed() override;
void CreationSucceeded() override;
void ErrorReceived(const ErrorValue& aError) override;
void LockNotified(bool aCreated) final {
// no-op for service workers
}
void WebTransportNotified(bool aCreated) final {
// no-op for service workers
}
void Terminated() override;
// Refreshes only the parts of mRemoteWorkerData that may change over time.
void RefreshRemoteWorkerData(
const RefPtr<ServiceWorkerRegistrationInfo>& aRegistration);
nsresult SendPushEventInternal(
RefPtr<ServiceWorkerRegistrationInfo>&& aRegistration,
ServiceWorkerPushEventOpArgs&& aArgs);
// Setup the navigation preload by the intercepted channel and the
// RegistrationInfo.
RefPtr<FetchServicePromises> SetupNavigationPreload(
nsCOMPtr<nsIInterceptedChannel>& aChannel,
const RefPtr<ServiceWorkerRegistrationInfo>& aRegistration);
nsresult SendFetchEventInternal(
RefPtr<ServiceWorkerRegistrationInfo>&& aRegistration,
ParentToParentServiceWorkerFetchEventOpArgs&& aArgs,
nsCOMPtr<nsIInterceptedChannel>&& aChannel,
RefPtr<FetchServicePromises>&& aPreloadResponseReadyPromises);
void Shutdown();
RefPtr<GenericNonExclusivePromise> ShutdownInternal(
uint32_t aShutdownStateId);
nsresult ExecServiceWorkerOp(
ServiceWorkerOpArgs&& aArgs,
std::function<void(ServiceWorkerOpResult&&)>&& aSuccessCallback,
std::function<void()>&& aFailureCallback = [] {});
class PendingFunctionalEvent {
public:
PendingFunctionalEvent(
ServiceWorkerPrivate* aOwner,
RefPtr<ServiceWorkerRegistrationInfo>&& aRegistration);
virtual ~PendingFunctionalEvent();
virtual nsresult Send() = 0;
protected:
ServiceWorkerPrivate* const MOZ_NON_OWNING_REF mOwner;
RefPtr<ServiceWorkerRegistrationInfo> mRegistration;
};
class PendingPushEvent final : public PendingFunctionalEvent {
public:
PendingPushEvent(ServiceWorkerPrivate* aOwner,
RefPtr<ServiceWorkerRegistrationInfo>&& aRegistration,
ServiceWorkerPushEventOpArgs&& aArgs);
nsresult Send() override;
private:
ServiceWorkerPushEventOpArgs mArgs;
};
class PendingFetchEvent final : public PendingFunctionalEvent {
public:
PendingFetchEvent(
ServiceWorkerPrivate* aOwner,
RefPtr<ServiceWorkerRegistrationInfo>&& aRegistration,
ParentToParentServiceWorkerFetchEventOpArgs&& aArgs,
nsCOMPtr<nsIInterceptedChannel>&& aChannel,
RefPtr<FetchServicePromises>&& aPreloadResponseReadyPromises);
nsresult Send() override;
~PendingFetchEvent();
private:
ParentToParentServiceWorkerFetchEventOpArgs mArgs;
nsCOMPtr<nsIInterceptedChannel> mChannel;
// The promises from FetchService. It indicates if the preload response is
// ready or not. The promise's resolve/reject value should be handled in
// FetchEventOpChild, such that the preload result can be propagated to the
// ServiceWorker through IPC. However, FetchEventOpChild creation could be
// pending here, so this member is needed. And it will be forwarded to
// FetchEventOpChild when crearting the FetchEventOpChild.
RefPtr<FetchServicePromises> mPreloadResponseReadyPromises;
};
nsTArray<UniquePtr<PendingFunctionalEvent>> mPendingFunctionalEvents;
/**
* It's possible that there are still in-progress operations when a
* a termination operation is issued. In this case, it's important to keep
* the RemoteWorkerControllerChild actor alive until all pending operations
* have completed before destroying it with Send__delete__().
*
* RAIIActorPtrHolder holds a singular, owning reference to a
* RemoteWorkerControllerChild actor and is responsible for destroying the
* actor in its (i.e. the holder's) destructor. This implies that all
* in-progress operations must maintain a strong reference to their
* corresponding holders and release the reference once completed/canceled.
*
* Additionally a RAIIActorPtrHolder must be initialized with a non-null actor
* and cannot be moved or copied. Therefore, the identities of two held
* actors can be compared by simply comparing their holders' addresses.
*/
class RAIIActorPtrHolder final {
public:
NS_INLINE_DECL_REFCOUNTING(RAIIActorPtrHolder)
explicit RAIIActorPtrHolder(
already_AddRefed<RemoteWorkerControllerChild> aActor);
RAIIActorPtrHolder(const RAIIActorPtrHolder& aOther) = delete;
RAIIActorPtrHolder& operator=(const RAIIActorPtrHolder& aOther) = delete;
RAIIActorPtrHolder(RAIIActorPtrHolder&& aOther) = delete;
RAIIActorPtrHolder& operator=(RAIIActorPtrHolder&& aOther) = delete;
RemoteWorkerControllerChild* operator->() const
MOZ_NO_ADDREF_RELEASE_ON_RETURN;
RemoteWorkerControllerChild* get() const;
RefPtr<GenericPromise> OnDestructor();
private:
~RAIIActorPtrHolder();
MozPromiseHolder<GenericPromise> mDestructorPromiseHolder;
const RefPtr<RemoteWorkerControllerChild> mActor;
};
RefPtr<RAIIActorPtrHolder> mControllerChild;
RemoteWorkerData mRemoteWorkerData;
TimeStamp mServiceWorkerLaunchTimeStart;
// Counters for Telemetry - totals running simultaneously, and those that
// handle Fetch, plus Max values for each
static uint32_t sRunningServiceWorkers;
static uint32_t sRunningServiceWorkersFetch;
static uint32_t sRunningServiceWorkersMax;
static uint32_t sRunningServiceWorkersFetchMax;
// We know the state after we've evaluated the worker, and we then store
// it in the registration. The only valid state transition should be
// from Unknown to Enabled or Disabled.
enum { Unknown, Enabled, Disabled } mHandlesFetch{Unknown};
// The info object owns us. It is possible to outlive it for a brief period
// of time if there are pending waitUntil promises, in which case it
// will be null and |SpawnWorkerIfNeeded| will always fail.
ServiceWorkerInfo* MOZ_NON_OWNING_REF mInfo;
nsCOMPtr<nsITimer> mIdleWorkerTimer;
// We keep a token for |dom.serviceWorkers.idle_timeout| seconds to give the
// worker a grace period after each event.
RefPtr<KeepAliveToken> mIdleKeepAliveToken;
uint64_t mDebuggerCount;
uint64_t mTokenCount;
// Used by the owning `ServiceWorkerRegistrationInfo` when it wants to call
// `Clear` after being unregistered and isn't controlling any clients but this
// worker (i.e. the registration's active worker) isn't idle yet. Note that
// such an event should happen at most once in a
// `ServiceWorkerRegistrationInfo`s lifetime, so this promise should also only
// be obtained at most once.
MozPromiseHolder<GenericPromise> mIdlePromiseHolder;
#ifdef DEBUG
bool mIdlePromiseObtained = false;
#endif
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_serviceworkerprivate_h