diff options
Diffstat (limited to 'dom/fetch/FetchConsumer.cpp')
| -rw-r--r-- | dom/fetch/FetchConsumer.cpp | 1413 |
1 files changed, 714 insertions, 699 deletions
diff --git a/dom/fetch/FetchConsumer.cpp b/dom/fetch/FetchConsumer.cpp index e82e5ec51..581f014d9 100644 --- a/dom/fetch/FetchConsumer.cpp +++ b/dom/fetch/FetchConsumer.cpp @@ -1,699 +1,714 @@ -/* -*- 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); - - 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(); }); - - MOZ_ALWAYS_SUCCEEDS(NS_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 +/* -*- 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,
+ AbortSignal* aSignal,
+ 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);
+
+ aRv = NS_DispatchToMainThread(r.forget());
+
+ 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(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(); });
+
+ MOZ_ALWAYS_SUCCEEDS(NS_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>
+void
+FetchBodyConsumer<Derived>::Aborted()
+{
+ 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
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