gecko-dev/dom/fetch/FetchConsumer.cpp

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Исходник Обычный вид История

/* -*- 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 "Fetch.h"
#include "FetchConsumer.h"
#include "mozilla/dom/WorkerCommon.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerRunnable.h"
#include "mozilla/dom/WorkerScope.h"
#include "mozilla/ipc/PBackgroundSharedTypes.h"
#include "nsIInputStreamPump.h"
#include "nsProxyRelease.h"
namespace mozilla {
namespace dom {
namespace {
template <class Derived>
class FetchBodyWorkerHolder final : public WorkerHolder
{
RefPtr<FetchBodyConsumer<Derived>> mConsumer;
bool mWasNotified;
public:
explicit FetchBodyWorkerHolder(FetchBodyConsumer<Derived>* aConsumer)
: WorkerHolder("FetchBodyWorkerHolder")
, mConsumer(aConsumer)
, mWasNotified(false)
{
MOZ_ASSERT(aConsumer);
}
~FetchBodyWorkerHolder() = default;
bool Notify(WorkerStatus aStatus) override
{
MOZ_ASSERT(aStatus > Running);
if (!mWasNotified) {
mWasNotified = true;
mConsumer->ShutDownMainThreadConsuming();
}
return true;
}
};
template <class Derived>
class BeginConsumeBodyRunnable final : public Runnable
{
RefPtr<FetchBodyConsumer<Derived>> mFetchBodyConsumer;
public:
explicit BeginConsumeBodyRunnable(FetchBodyConsumer<Derived>* aConsumer)
: Runnable("BeginConsumeBodyRunnable")
, mFetchBodyConsumer(aConsumer)
{ }
NS_IMETHOD
Run() override
{
mFetchBodyConsumer->BeginConsumeBodyMainThread();
return NS_OK;
}
};
/*
* Called on successfully reading the complete stream.
*/
template <class Derived>
class ContinueConsumeBodyRunnable final : public MainThreadWorkerRunnable
{
RefPtr<FetchBodyConsumer<Derived>> mFetchBodyConsumer;
nsresult mStatus;
uint32_t mLength;
uint8_t* mResult;
public:
ContinueConsumeBodyRunnable(FetchBodyConsumer<Derived>* aFetchBodyConsumer,
nsresult aStatus, uint32_t aLength,
uint8_t* aResult)
: MainThreadWorkerRunnable(aFetchBodyConsumer->GetWorkerPrivate())
, mFetchBodyConsumer(aFetchBodyConsumer)
, mStatus(aStatus)
, mLength(aLength)
, mResult(aResult)
{
MOZ_ASSERT(NS_IsMainThread());
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
mFetchBodyConsumer->ContinueConsumeBody(mStatus, mLength, mResult);
return true;
}
};
// ControlRunnable used to complete the releasing of resources on the worker
// thread when already shutting down.
template <class Derived>
class ContinueConsumeBodyControlRunnable final : public MainThreadWorkerControlRunnable
{
RefPtr<FetchBodyConsumer<Derived>> mFetchBodyConsumer;
public:
ContinueConsumeBodyControlRunnable(FetchBodyConsumer<Derived>* aFetchBodyConsumer,
uint8_t* aResult)
: MainThreadWorkerControlRunnable(aFetchBodyConsumer->GetWorkerPrivate())
, mFetchBodyConsumer(aFetchBodyConsumer)
{
MOZ_ASSERT(NS_IsMainThread());
free(aResult);
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
mFetchBodyConsumer->ContinueConsumeBody(NS_BINDING_ABORTED, 0, nullptr,
true /* shutting down */);
return true;
}
};
template <class Derived>
class FailConsumeBodyWorkerRunnable : public MainThreadWorkerControlRunnable
{
RefPtr<FetchBodyConsumer<Derived>> mBodyConsumer;
public:
explicit FailConsumeBodyWorkerRunnable(FetchBodyConsumer<Derived>* aBodyConsumer)
: MainThreadWorkerControlRunnable(aBodyConsumer->GetWorkerPrivate())
, mBodyConsumer(aBodyConsumer)
{
AssertIsOnMainThread();
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
mBodyConsumer->ContinueConsumeBody(NS_ERROR_FAILURE, 0, nullptr);
return true;
}
};
/*
* In case of failure to create a stream pump or dispatch stream completion to
* worker, ensure we cleanup properly. Thread agnostic.
*/
template <class Derived>
class MOZ_STACK_CLASS AutoFailConsumeBody final
{
RefPtr<FetchBodyConsumer<Derived>> mBodyConsumer;
public:
explicit AutoFailConsumeBody(FetchBodyConsumer<Derived>* aBodyConsumer)
: mBodyConsumer(aBodyConsumer)
{}
~AutoFailConsumeBody()
{
AssertIsOnMainThread();
if (mBodyConsumer) {
if (mBodyConsumer->GetWorkerPrivate()) {
RefPtr<FailConsumeBodyWorkerRunnable<Derived>> r =
new FailConsumeBodyWorkerRunnable<Derived>(mBodyConsumer);
if (!r->Dispatch()) {
MOZ_CRASH("We are going to leak");
}
} else {
mBodyConsumer->ContinueConsumeBody(NS_ERROR_FAILURE, 0, nullptr);
}
}
}
void
DontFail()
{
mBodyConsumer = nullptr;
}
};
/*
* Called on successfully reading the complete stream for Blob.
*/
template <class Derived>
class ContinueConsumeBlobBodyRunnable final : public MainThreadWorkerRunnable
{
RefPtr<FetchBodyConsumer<Derived>> mFetchBodyConsumer;
RefPtr<BlobImpl> mBlobImpl;
public:
ContinueConsumeBlobBodyRunnable(FetchBodyConsumer<Derived>* aFetchBodyConsumer,
BlobImpl* aBlobImpl)
: MainThreadWorkerRunnable(aFetchBodyConsumer->GetWorkerPrivate())
, mFetchBodyConsumer(aFetchBodyConsumer)
, mBlobImpl(aBlobImpl)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mBlobImpl);
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
mFetchBodyConsumer->ContinueConsumeBlobBody(mBlobImpl);
return true;
}
};
// ControlRunnable used to complete the releasing of resources on the worker
// thread when already shutting down.
template <class Derived>
class ContinueConsumeBlobBodyControlRunnable final
: public MainThreadWorkerControlRunnable
{
RefPtr<FetchBodyConsumer<Derived>> mFetchBodyConsumer;
public:
explicit ContinueConsumeBlobBodyControlRunnable(FetchBodyConsumer<Derived>* aFetchBodyConsumer)
: MainThreadWorkerControlRunnable(aFetchBodyConsumer->GetWorkerPrivate())
, mFetchBodyConsumer(aFetchBodyConsumer)
{
MOZ_ASSERT(NS_IsMainThread());
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
mFetchBodyConsumer->ContinueConsumeBlobBody(nullptr,
true /* shutting down */);
return true;
}
};
template <class Derived>
class ConsumeBodyDoneObserver : public nsIStreamLoaderObserver
, public MutableBlobStorageCallback
{
RefPtr<FetchBodyConsumer<Derived>> mFetchBodyConsumer;
public:
NS_DECL_THREADSAFE_ISUPPORTS
explicit ConsumeBodyDoneObserver(FetchBodyConsumer<Derived>* aFetchBodyConsumer)
: mFetchBodyConsumer(aFetchBodyConsumer)
{ }
NS_IMETHOD
OnStreamComplete(nsIStreamLoader* aLoader,
nsISupports* aCtxt,
nsresult aStatus,
uint32_t aResultLength,
const uint8_t* aResult) override
{
MOZ_ASSERT(NS_IsMainThread());
// The loading is completed. Let's nullify the pump before continuing the
// consuming of the body.
mFetchBodyConsumer->NullifyConsumeBodyPump();
uint8_t* nonconstResult = const_cast<uint8_t*>(aResult);
if (!mFetchBodyConsumer->GetWorkerPrivate()) {
mFetchBodyConsumer->ContinueConsumeBody(aStatus, aResultLength,
nonconstResult);
// FetchBody is responsible for data.
return NS_SUCCESS_ADOPTED_DATA;
}
{
RefPtr<ContinueConsumeBodyRunnable<Derived>> r =
new ContinueConsumeBodyRunnable<Derived>(mFetchBodyConsumer,
aStatus,
aResultLength,
nonconstResult);
if (r->Dispatch()) {
// FetchBody is responsible for data.
return NS_SUCCESS_ADOPTED_DATA;
}
}
// The worker is shutting down. Let's use a control runnable to complete the
// shutting down procedure.
RefPtr<ContinueConsumeBodyControlRunnable<Derived>> r =
new ContinueConsumeBodyControlRunnable<Derived>(mFetchBodyConsumer,
nonconstResult);
if (NS_WARN_IF(!r->Dispatch())) {
return NS_ERROR_FAILURE;
}
// FetchBody is responsible for data.
return NS_SUCCESS_ADOPTED_DATA;
}
virtual void BlobStoreCompleted(MutableBlobStorage* aBlobStorage,
Blob* aBlob,
nsresult aRv) override
{
// On error.
if (NS_FAILED(aRv)) {
OnStreamComplete(nullptr, nullptr, aRv, 0, nullptr);
return;
}
// The loading is completed. Let's nullify the pump before continuing the
// consuming of the body.
mFetchBodyConsumer->NullifyConsumeBodyPump();
MOZ_ASSERT(aBlob);
if (!mFetchBodyConsumer->GetWorkerPrivate()) {
mFetchBodyConsumer->ContinueConsumeBlobBody(aBlob->Impl());
return;
}
{
RefPtr<ContinueConsumeBlobBodyRunnable<Derived>> r =
new ContinueConsumeBlobBodyRunnable<Derived>(mFetchBodyConsumer,
aBlob->Impl());
if (r->Dispatch()) {
return;
}
}
// The worker is shutting down. Let's use a control runnable to complete the
// shutting down procedure.
RefPtr<ContinueConsumeBlobBodyControlRunnable<Derived>> r =
new ContinueConsumeBlobBodyControlRunnable<Derived>(mFetchBodyConsumer);
Unused << NS_WARN_IF(!r->Dispatch());
}
private:
virtual ~ConsumeBodyDoneObserver()
{ }
};
template <class Derived>
NS_IMPL_ADDREF(ConsumeBodyDoneObserver<Derived>)
template <class Derived>
NS_IMPL_RELEASE(ConsumeBodyDoneObserver<Derived>)
template <class Derived>
NS_INTERFACE_MAP_BEGIN(ConsumeBodyDoneObserver<Derived>)
NS_INTERFACE_MAP_ENTRY(nsIStreamLoaderObserver)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStreamLoaderObserver)
NS_INTERFACE_MAP_END
} // anonymous
template <class Derived>
/* static */ already_AddRefed<Promise>
FetchBodyConsumer<Derived>::Create(nsIGlobalObject* aGlobal,
nsIEventTarget* aMainThreadEventTarget,
FetchBody<Derived>* aBody,
AbortSignal* aSignal,
FetchConsumeType aType,
ErrorResult& aRv)
{
MOZ_ASSERT(aBody);
MOZ_ASSERT(aMainThreadEventTarget);
nsCOMPtr<nsIInputStream> bodyStream;
aBody->DerivedClass()->GetBody(getter_AddRefs(bodyStream));
if (!bodyStream) {
aRv = NS_NewCStringInputStream(getter_AddRefs(bodyStream), EmptyCString());
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
}
RefPtr<Promise> promise = Promise::Create(aGlobal, aRv);
if (aRv.Failed()) {
return nullptr;
}
WorkerPrivate* workerPrivate = nullptr;
if (!NS_IsMainThread()) {
workerPrivate = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(workerPrivate);
}
RefPtr<FetchBodyConsumer<Derived>> consumer =
new FetchBodyConsumer<Derived>(aMainThreadEventTarget, aGlobal,
workerPrivate, aBody, bodyStream, promise,
aType);
if (!NS_IsMainThread()) {
MOZ_ASSERT(workerPrivate);
if (NS_WARN_IF(!consumer->RegisterWorkerHolder())) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
} else {
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (NS_WARN_IF(!os)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
aRv = os->AddObserver(consumer, DOM_WINDOW_DESTROYED_TOPIC, true);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
aRv = os->AddObserver(consumer, DOM_WINDOW_FROZEN_TOPIC, true);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
}
nsCOMPtr<nsIRunnable> r = new BeginConsumeBodyRunnable<Derived>(consumer);
aRv = aMainThreadEventTarget->Dispatch(r.forget(), NS_DISPATCH_NORMAL);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
if (aSignal) {
consumer->Follow(aSignal);
}
return promise.forget();
}
template <class Derived>
void
FetchBodyConsumer<Derived>::ReleaseObject()
{
AssertIsOnTargetThread();
if (NS_IsMainThread()) {
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
os->RemoveObserver(this, DOM_WINDOW_DESTROYED_TOPIC);
os->RemoveObserver(this, DOM_WINDOW_FROZEN_TOPIC);
}
}
mGlobal = nullptr;
mWorkerHolder = nullptr;
#ifdef DEBUG
mBody = nullptr;
#endif
Unfollow();
}
template <class Derived>
FetchBodyConsumer<Derived>::FetchBodyConsumer(nsIEventTarget* aMainThreadEventTarget,
nsIGlobalObject* aGlobalObject,
WorkerPrivate* aWorkerPrivate,
FetchBody<Derived>* aBody,
nsIInputStream* aBodyStream,
Promise* aPromise,
FetchConsumeType aType)
: mTargetThread(NS_GetCurrentThread())
, mMainThreadEventTarget(aMainThreadEventTarget)
#ifdef DEBUG
, mBody(aBody)
#endif
, mBodyStream(aBodyStream)
, mBlobStorageType(MutableBlobStorage::eOnlyInMemory)
, mGlobal(aGlobalObject)
, mWorkerPrivate(aWorkerPrivate)
, mConsumeType(aType)
, mConsumePromise(aPromise)
, mBodyConsumed(false)
, mShuttingDown(false)
{
MOZ_ASSERT(aMainThreadEventTarget);
MOZ_ASSERT(aBody);
MOZ_ASSERT(aBodyStream);
MOZ_ASSERT(aPromise);
const mozilla::UniquePtr<mozilla::ipc::PrincipalInfo>& principalInfo =
aBody->DerivedClass()->GetPrincipalInfo();
// We support temporary file for blobs only if the principal is known and
// it's system or content not in private Browsing.
if (principalInfo &&
(principalInfo->type() == mozilla::ipc::PrincipalInfo::TSystemPrincipalInfo ||
(principalInfo->type() == mozilla::ipc::PrincipalInfo::TContentPrincipalInfo &&
principalInfo->get_ContentPrincipalInfo().attrs().mPrivateBrowsingId == 0))) {
mBlobStorageType = MutableBlobStorage::eCouldBeInTemporaryFile;
}
mBodyMimeType = aBody->MimeType();
}
template <class Derived>
FetchBodyConsumer<Derived>::~FetchBodyConsumer()
{
}
template <class Derived>
void
FetchBodyConsumer<Derived>::AssertIsOnTargetThread() const
{
MOZ_ASSERT(NS_GetCurrentThread() == mTargetThread);
}
template <class Derived>
bool
FetchBodyConsumer<Derived>::RegisterWorkerHolder()
{
MOZ_ASSERT(mWorkerPrivate);
mWorkerPrivate->AssertIsOnWorkerThread();
MOZ_ASSERT(!mWorkerHolder);
mWorkerHolder.reset(new FetchBodyWorkerHolder<Derived>(this));
if (!mWorkerHolder->HoldWorker(mWorkerPrivate, Closing)) {
NS_WARNING("Failed to add workerHolder");
mWorkerHolder = nullptr;
return false;
}
return true;
}
/*
* BeginConsumeBodyMainThread() will automatically reject the consume promise
* and clean up on any failures, so there is no need for callers to do so,
* reflected in a lack of error return code.
*/
template <class Derived>
void
FetchBodyConsumer<Derived>::BeginConsumeBodyMainThread()
{
AssertIsOnMainThread();
AutoFailConsumeBody<Derived> autoReject(this);
if (mShuttingDown) {
// We haven't started yet, but we have been terminated. AutoFailConsumeBody
// will dispatch a runnable to release resources.
return;
}
nsCOMPtr<nsIInputStreamPump> pump;
nsresult rv = NS_NewInputStreamPump(getter_AddRefs(pump),
mBodyStream.forget(), 0, 0, false,
mMainThreadEventTarget);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
RefPtr<ConsumeBodyDoneObserver<Derived>> p =
new ConsumeBodyDoneObserver<Derived>(this);
nsCOMPtr<nsIStreamListener> listener;
if (mConsumeType == CONSUME_BLOB) {
listener = new MutableBlobStreamListener(mBlobStorageType, nullptr,
mBodyMimeType, p,
mMainThreadEventTarget);
} else {
nsCOMPtr<nsIStreamLoader> loader;
rv = NS_NewStreamLoader(getter_AddRefs(loader), p);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
listener = loader;
}
rv = pump->AsyncRead(listener, nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
// Now that everything succeeded, we can assign the pump to a pointer that
// stays alive for the lifetime of the FetchConsumer.
mConsumeBodyPump = pump;
// It is ok for retargeting to fail and reads to happen on the main thread.
autoReject.DontFail();
// Try to retarget, otherwise fall back to main thread.
nsCOMPtr<nsIThreadRetargetableRequest> rr = do_QueryInterface(pump);
if (rr) {
nsCOMPtr<nsIEventTarget> sts = do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
rv = rr->RetargetDeliveryTo(sts);
if (NS_WARN_IF(NS_FAILED(rv))) {
NS_WARNING("Retargeting failed");
}
}
}
template <class Derived>
void
FetchBodyConsumer<Derived>::ContinueConsumeBody(nsresult aStatus,
uint32_t aResultLength,
uint8_t* aResult,
bool aShuttingDown)
{
AssertIsOnTargetThread();
if (mBodyConsumed) {
return;
}
mBodyConsumed = true;
// Just a precaution to ensure ContinueConsumeBody is not called out of
// sync with a body read.
MOZ_ASSERT(mBody->BodyUsed());
auto autoFree = mozilla::MakeScopeExit([&] {
free(aResult);
});
MOZ_ASSERT(mConsumePromise);
RefPtr<Promise> localPromise = mConsumePromise.forget();
RefPtr<FetchBodyConsumer<Derived>> self = this;
auto autoReleaseObject = mozilla::MakeScopeExit([&] {
self->ReleaseObject();
});
if (aShuttingDown) {
// If shutting down, we don't want to resolve any promise.
return;
}
if (NS_WARN_IF(NS_FAILED(aStatus))) {
localPromise->MaybeReject(NS_ERROR_DOM_ABORT_ERR);
}
// Don't warn here since we warned above.
if (NS_FAILED(aStatus)) {
return;
}
// Finish successfully consuming body according to type.
MOZ_ASSERT(aResult);
AutoJSAPI jsapi;
if (!jsapi.Init(mGlobal)) {
localPromise->MaybeReject(NS_ERROR_UNEXPECTED);
return;
}
JSContext* cx = jsapi.cx();
ErrorResult error;
switch (mConsumeType) {
case CONSUME_ARRAYBUFFER: {
JS::Rooted<JSObject*> arrayBuffer(cx);
BodyUtil::ConsumeArrayBuffer(cx, &arrayBuffer, aResultLength, aResult,
error);
if (!error.Failed()) {
JS::Rooted<JS::Value> val(cx);
val.setObjectOrNull(arrayBuffer);
localPromise->MaybeResolve(cx, val);
// ArrayBuffer takes over ownership.
aResult = nullptr;
}
break;
}
case CONSUME_BLOB: {
MOZ_CRASH("This should not happen.");
break;
}
case CONSUME_FORMDATA: {
nsCString data;
data.Adopt(reinterpret_cast<char*>(aResult), aResultLength);
aResult = nullptr;
RefPtr<dom::FormData> fd =
BodyUtil::ConsumeFormData(mGlobal, mBodyMimeType, data, error);
if (!error.Failed()) {
localPromise->MaybeResolve(fd);
}
break;
}
case CONSUME_TEXT:
// fall through handles early exit.
case CONSUME_JSON: {
nsString decoded;
if (NS_SUCCEEDED(BodyUtil::ConsumeText(aResultLength, aResult, decoded))) {
if (mConsumeType == CONSUME_TEXT) {
localPromise->MaybeResolve(decoded);
} else {
JS::Rooted<JS::Value> json(cx);
BodyUtil::ConsumeJson(cx, &json, decoded, error);
if (!error.Failed()) {
localPromise->MaybeResolve(cx, json);
}
}
};
break;
}
default:
NS_NOTREACHED("Unexpected consume body type");
}
error.WouldReportJSException();
if (error.Failed()) {
localPromise->MaybeReject(error);
}
}
template <class Derived>
void
FetchBodyConsumer<Derived>::ContinueConsumeBlobBody(BlobImpl* aBlobImpl,
bool aShuttingDown)
{
AssertIsOnTargetThread();
MOZ_ASSERT(mConsumeType == CONSUME_BLOB);
if (mBodyConsumed) {
return;
}
mBodyConsumed = true;
// Just a precaution to ensure ContinueConsumeBody is not called out of
// sync with a body read.
MOZ_ASSERT(mBody->BodyUsed());
if (!aShuttingDown) {
MOZ_ASSERT(mConsumePromise);
RefPtr<Promise> localPromise = mConsumePromise.forget();
RefPtr<dom::Blob> blob = dom::Blob::Create(mGlobal, aBlobImpl);
MOZ_ASSERT(blob);
localPromise->MaybeResolve(blob);
}
ReleaseObject();
}
template <class Derived>
void
FetchBodyConsumer<Derived>::ShutDownMainThreadConsuming()
{
if (!NS_IsMainThread()) {
RefPtr<FetchBodyConsumer<Derived>> self = this;
nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
"FetchBodyConsumer::ShutDownMainThreadConsuming",
[self] () { self->ShutDownMainThreadConsuming(); });
mMainThreadEventTarget->Dispatch(r.forget(), NS_DISPATCH_NORMAL);
return;
}
// We need this because maybe, mConsumeBodyPump has not been created yet. We
// must be sure that we don't try to do it.
mShuttingDown = true;
if (mConsumeBodyPump) {
mConsumeBodyPump->Cancel(NS_BINDING_ABORTED);
mConsumeBodyPump = nullptr;
}
}
template <class Derived>
NS_IMETHODIMP
FetchBodyConsumer<Derived>::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData)
{
AssertIsOnMainThread();
MOZ_ASSERT((strcmp(aTopic, DOM_WINDOW_FROZEN_TOPIC) == 0) ||
(strcmp(aTopic, DOM_WINDOW_DESTROYED_TOPIC) == 0));
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(mGlobal);
if (SameCOMIdentity(aSubject, window)) {
ContinueConsumeBody(NS_BINDING_ABORTED, 0, nullptr);
}
return NS_OK;
}
template <class Derived>
void
FetchBodyConsumer<Derived>::Abort()
{
AssertIsOnTargetThread();
ContinueConsumeBody(NS_ERROR_DOM_ABORT_ERR, 0, nullptr);
}
template <class Derived>
NS_IMPL_ADDREF(FetchBodyConsumer<Derived>)
template <class Derived>
NS_IMPL_RELEASE(FetchBodyConsumer<Derived>)
template <class Derived>
NS_IMPL_QUERY_INTERFACE(FetchBodyConsumer<Derived>,
nsIObserver,
nsISupportsWeakReference)
} // namespace dom
} // namespace mozilla