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-rw-r--r--dom/fetch/FetchConsumer.cpp705
1 files changed, 705 insertions, 0 deletions
diff --git a/dom/fetch/FetchConsumer.cpp b/dom/fetch/FetchConsumer.cpp
new file mode 100644
index 000000000..42dfcbaba
--- /dev/null
+++ b/dom/fetch/FetchConsumer.cpp
@@ -0,0 +1,705 @@
+/* -*- 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 "nsIInputStreamPump.h"
+#include "nsProxyRelease.h"
+#include "WorkerPrivate.h"
+#include "WorkerRunnable.h"
+#include "WorkerScope.h"
+#include "Workers.h"
+
+namespace mozilla {
+namespace dom {
+
+using namespace workers;
+
+namespace {
+
+template <class Derived>
+class FetchBodyWorkerHolder final : public workers::WorkerHolder
+{
+ RefPtr<FetchBodyConsumer<Derived>> mConsumer;
+ bool mWasNotified;
+
+public:
+ explicit FetchBodyWorkerHolder(FetchBodyConsumer<Derived>* aConsumer)
+ : mConsumer(aConsumer)
+ , mWasNotified(false)
+ {
+ MOZ_ASSERT(aConsumer);
+ }
+
+ ~FetchBodyWorkerHolder() = default;
+
+ bool Notify(workers::Status aStatus) override
+ {
+ MOZ_ASSERT(aStatus > workers::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)
+ : 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;
+ }
+};
+
+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;
+ }
+};
+
+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()) {
+ RefPtr<ContinueConsumeBodyRunnable<Derived>> r =
+ new ContinueConsumeBodyRunnable<Derived>(mFetchBodyConsumer,
+ aStatus,
+ aResultLength,
+ nonconstResult);
+ if (!r->Dispatch()) {
+ NS_WARNING("Could not dispatch ConsumeBodyRunnable");
+ // Return failure so that aResult is freed.
+ return NS_ERROR_FAILURE;
+ }
+ } else {
+ mFetchBodyConsumer->ContinueConsumeBody(aStatus, aResultLength,
+ nonconstResult);
+ }
+
+ // 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()) {
+ RefPtr<ContinueConsumeBlobBodyRunnable<Derived>> r =
+ new ContinueConsumeBlobBodyRunnable<Derived>(mFetchBodyConsumer,
+ aBlob->Impl());
+
+ if (!r->Dispatch()) {
+ NS_WARNING("Could not dispatch ConsumeBlobBodyRunnable");
+ return;
+ }
+ } else {
+ mFetchBodyConsumer->ContinueConsumeBlobBody(aBlob->Impl());
+ }
+ }
+
+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,
+ FetchBody<Derived>* aBody,
+ FetchConsumeType aType,
+ ErrorResult& aRv)
+{
+ MOZ_ASSERT(aBody);
+
+ 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>(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);
+
+ if (workerPrivate) {
+ aRv = workerPrivate->DispatchToMainThread(r.forget());
+ } else {
+ aRv = NS_DispatchToMainThread(r.forget());
+ }
+
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ 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
+}
+
+template <class Derived>
+FetchBodyConsumer<Derived>::FetchBodyConsumer(nsIGlobalObject* aGlobalObject,
+ WorkerPrivate* aWorkerPrivate,
+ FetchBody<Derived>* aBody,
+ nsIInputStream* aBodyStream,
+ Promise* aPromise,
+ FetchConsumeType aType)
+ : mTargetThread(NS_GetCurrentThread())
+#ifdef DEBUG
+ , mBody(aBody)
+#endif
+ , mBodyStream(aBodyStream)
+ , mBlobStorageType(MutableBlobStorage::eOnlyInMemory)
+ , mGlobal(aGlobalObject)
+ , mWorkerPrivate(aWorkerPrivate)
+ , mConsumeType(aType)
+ , mConsumePromise(aPromise)
+ , mBodyConsumed(false)
+ , mShuttingDown(false)
+{
+ 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, -1, -1, 0, 0, false);
+ 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);
+ } 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)
+{
+ 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 (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)
+{
+ 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());
+
+ 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(
+ [self] () { self->ShutDownMainThreadConsuming(); });
+
+ WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
+ MOZ_ASSERT(workerPrivate);
+ workerPrivate->DispatchToMainThread(r.forget());
+ 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>
+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