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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 "Fetch.h"
#include "js/Value.h"
#include "mozilla/CycleCollectedJSContext.h"
#include "mozilla/dom/Document.h"
#include "mozilla/ipc/PBackgroundSharedTypes.h"
#include "nsIGlobalObject.h"
#include "nsDOMString.h"
#include "nsJSUtils.h"
#include "nsNetUtil.h"
#include "nsReadableUtils.h"
#include "nsStreamUtils.h"
#include "nsStringStream.h"
#include "nsProxyRelease.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/dom/MimeType.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/BodyConsumer.h"
#include "mozilla/dom/Exceptions.h"
#include "mozilla/dom/DOMException.h"
#include "mozilla/dom/FetchDriver.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/FormData.h"
#include "mozilla/dom/Headers.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/PromiseWorkerProxy.h"
#include "mozilla/dom/ReadableStreamDefaultReader.h"
#include "mozilla/dom/RemoteWorkerChild.h"
#include "mozilla/dom/Request.h"
#include "mozilla/dom/Response.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/URLSearchParams.h"
#include "mozilla/net/CookieJarSettings.h"
#include "BodyExtractor.h"
#include "FetchObserver.h"
#include "InternalRequest.h"
#include "InternalResponse.h"
#include "mozilla/dom/WorkerCommon.h"
#include "mozilla/dom/WorkerRef.h"
#include "mozilla/dom/WorkerRunnable.h"
#include "mozilla/dom/WorkerScope.h"
namespace mozilla::dom {
namespace {
void AbortStream(JSContext* aCx, ReadableStream* aReadableStream,
ErrorResult& aRv) {
if (aReadableStream->State() != ReadableStream::ReaderState::Readable) {
return;
}
RefPtr<DOMException> e = DOMException::Create(NS_ERROR_DOM_ABORT_ERR);
JS::Rooted<JS::Value> value(aCx);
if (!GetOrCreateDOMReflector(aCx, e, &value)) {
return;
}
ReadableStreamError(aCx, aReadableStream, value, aRv);
}
} // namespace
class AbortSignalMainThread final : public AbortSignalImpl {
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(AbortSignalMainThread)
explicit AbortSignalMainThread(bool aAborted)
: AbortSignalImpl(aAborted, JS::UndefinedHandleValue) {
mozilla::HoldJSObjects(this);
}
private:
~AbortSignalMainThread() { mozilla::DropJSObjects(this); };
};
NS_IMPL_CYCLE_COLLECTION_CLASS(AbortSignalMainThread)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AbortSignalMainThread)
AbortSignalImpl::Unlink(static_cast<AbortSignalImpl*>(tmp));
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(AbortSignalMainThread)
AbortSignalImpl::Traverse(static_cast<AbortSignalImpl*>(tmp), cb);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(AbortSignalMainThread)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mReason)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(AbortSignalMainThread)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(AbortSignalMainThread)
NS_IMPL_CYCLE_COLLECTING_RELEASE(AbortSignalMainThread)
class AbortSignalProxy;
// This runnable propagates changes from the AbortSignalImpl on workers to the
// AbortSignalImpl on main-thread.
class AbortSignalProxyRunnable final : public Runnable {
RefPtr<AbortSignalProxy> mProxy;
public:
explicit AbortSignalProxyRunnable(AbortSignalProxy* aProxy)
: Runnable("dom::AbortSignalProxyRunnable"), mProxy(aProxy) {}
NS_IMETHOD Run() override;
};
// This class orchestrates the proxying of AbortSignal operations between the
// main thread and a worker thread.
class AbortSignalProxy final : public AbortFollower {
// This is created and released on the main-thread.
RefPtr<AbortSignalImpl> mSignalImplMainThread;
// The main-thread event target for runnable dispatching.
nsCOMPtr<nsIEventTarget> mMainThreadEventTarget;
// This value is used only when creating mSignalImplMainThread on the main
// thread, to create it in already-aborted state if necessary. It does *not*
// reflect the instantaneous is-aborted status of the worker thread's
// AbortSignal.
const bool mAborted;
public:
NS_DECL_THREADSAFE_ISUPPORTS
AbortSignalProxy(AbortSignalImpl* aSignalImpl,
nsIEventTarget* aMainThreadEventTarget)
: mMainThreadEventTarget(aMainThreadEventTarget),
mAborted(aSignalImpl->Aborted()) {
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(mMainThreadEventTarget);
Follow(aSignalImpl);
}
// AbortFollower
void RunAbortAlgorithm() override;
AbortSignalImpl* GetOrCreateSignalImplForMainThread() {
MOZ_ASSERT(NS_IsMainThread());
if (!mSignalImplMainThread) {
mSignalImplMainThread = new AbortSignalMainThread(mAborted);
}
return mSignalImplMainThread;
}
AbortSignalImpl* GetSignalImplForTargetThread() {
MOZ_ASSERT(!NS_IsMainThread());
return Signal();
}
nsIEventTarget* MainThreadEventTarget() { return mMainThreadEventTarget; }
void Shutdown() {
MOZ_ASSERT(!NS_IsMainThread());
Unfollow();
}
private:
~AbortSignalProxy() {
NS_ProxyRelease("AbortSignalProxy::mSignalImplMainThread",
mMainThreadEventTarget, mSignalImplMainThread.forget());
}
};
NS_IMPL_ISUPPORTS0(AbortSignalProxy)
NS_IMETHODIMP AbortSignalProxyRunnable::Run() {
MOZ_ASSERT(NS_IsMainThread());
AbortSignalImpl* signalImpl = mProxy->GetOrCreateSignalImplForMainThread();
signalImpl->SignalAbort(JS::UndefinedHandleValue);
return NS_OK;
}
void AbortSignalProxy::RunAbortAlgorithm() {
MOZ_ASSERT(!NS_IsMainThread());
RefPtr<AbortSignalProxyRunnable> runnable =
new AbortSignalProxyRunnable(this);
MainThreadEventTarget()->Dispatch(runnable.forget(), NS_DISPATCH_NORMAL);
}
class WorkerFetchResolver final : public FetchDriverObserver {
// Thread-safe:
RefPtr<PromiseWorkerProxy> mPromiseProxy;
RefPtr<AbortSignalProxy> mSignalProxy;
// Touched only on the worker thread.
RefPtr<FetchObserver> mFetchObserver;
RefPtr<WeakWorkerRef> mWorkerRef;
bool mIsShutdown;
Atomic<bool> mNeedOnDataAvailable;
public:
// Returns null if worker is shutting down.
static already_AddRefed<WorkerFetchResolver> Create(
WorkerPrivate* aWorkerPrivate, Promise* aPromise,
AbortSignalImpl* aSignalImpl, FetchObserver* aObserver) {
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
RefPtr<PromiseWorkerProxy> proxy =
PromiseWorkerProxy::Create(aWorkerPrivate, aPromise);
if (!proxy) {
return nullptr;
}
RefPtr<AbortSignalProxy> signalProxy;
if (aSignalImpl) {
signalProxy = new AbortSignalProxy(
aSignalImpl, aWorkerPrivate->MainThreadEventTarget());
}
RefPtr<WorkerFetchResolver> r =
new WorkerFetchResolver(proxy, signalProxy, aObserver);
RefPtr<WeakWorkerRef> workerRef = WeakWorkerRef::Create(
aWorkerPrivate, [r]() { r->Shutdown(r->mWorkerRef->GetPrivate()); });
if (NS_WARN_IF(!workerRef)) {
return nullptr;
}
r->mWorkerRef = std::move(workerRef);
return r.forget();
}
AbortSignalImpl* GetAbortSignalForMainThread() {
MOZ_ASSERT(NS_IsMainThread());
if (!mSignalProxy) {
return nullptr;
}
return mSignalProxy->GetOrCreateSignalImplForMainThread();
}
AbortSignalImpl* GetAbortSignalForTargetThread() {
mPromiseProxy->GetWorkerPrivate()->AssertIsOnWorkerThread();
if (!mSignalProxy) {
return nullptr;
}
return mSignalProxy->GetSignalImplForTargetThread();
}
PromiseWorkerProxy* PromiseProxy() const {
MOZ_ASSERT(NS_IsMainThread());
return mPromiseProxy;
}
Promise* WorkerPromise(WorkerPrivate* aWorkerPrivate) const {
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
MOZ_ASSERT(!mIsShutdown);
return mPromiseProxy->WorkerPromise();
}
FetchObserver* GetFetchObserver(WorkerPrivate* aWorkerPrivate) const {
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
return mFetchObserver;
}
void OnResponseAvailableInternal(
SafeRefPtr<InternalResponse> aResponse) override;
void OnResponseEnd(FetchDriverObserver::EndReason aReason) override;
bool NeedOnDataAvailable() override;
void OnDataAvailable() override;
void Shutdown(WorkerPrivate* aWorkerPrivate) {
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
mIsShutdown = true;
mPromiseProxy->CleanUp();
mNeedOnDataAvailable = false;
mFetchObserver = nullptr;
if (mSignalProxy) {
mSignalProxy->Shutdown();
}
mWorkerRef = nullptr;
}
bool IsShutdown(WorkerPrivate* aWorkerPrivate) const {
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
return mIsShutdown;
}
private:
WorkerFetchResolver(PromiseWorkerProxy* aProxy,
AbortSignalProxy* aSignalProxy, FetchObserver* aObserver)
: mPromiseProxy(aProxy),
mSignalProxy(aSignalProxy),
mFetchObserver(aObserver),
mIsShutdown(false),
mNeedOnDataAvailable(!!aObserver) {
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(mPromiseProxy);
}
~WorkerFetchResolver() = default;
virtual void FlushConsoleReport() override;
};
void FetchDriverObserver::OnResponseAvailable(
SafeRefPtr<InternalResponse> aResponse) {
MOZ_ASSERT(!mGotResponseAvailable);
mGotResponseAvailable = true;
OnResponseAvailableInternal(std::move(aResponse));
}
class MainThreadFetchResolver final : public FetchDriverObserver {
RefPtr<Promise> mPromise;
RefPtr<Response> mResponse;
RefPtr<FetchObserver> mFetchObserver;
RefPtr<AbortSignalImpl> mSignalImpl;
const bool mMozErrors;
nsCOMPtr<nsILoadGroup> mLoadGroup;
NS_DECL_OWNINGTHREAD
public:
MainThreadFetchResolver(Promise* aPromise, FetchObserver* aObserver,
AbortSignalImpl* aSignalImpl, bool aMozErrors)
: mPromise(aPromise),
mFetchObserver(aObserver),
mSignalImpl(aSignalImpl),
mMozErrors(aMozErrors) {}
void OnResponseAvailableInternal(
SafeRefPtr<InternalResponse> aResponse) override;
void SetLoadGroup(nsILoadGroup* aLoadGroup) { mLoadGroup = aLoadGroup; }
void OnResponseEnd(FetchDriverObserver::EndReason aReason) override {
if (aReason == eAborted) {
mPromise->MaybeReject(NS_ERROR_DOM_ABORT_ERR);
}
mFetchObserver = nullptr;
FlushConsoleReport();
}
bool NeedOnDataAvailable() override;
void OnDataAvailable() override;
private:
~MainThreadFetchResolver();
void FlushConsoleReport() override {
mReporter->FlushConsoleReports(mLoadGroup);
}
};
class MainThreadFetchRunnable : public Runnable {
RefPtr<WorkerFetchResolver> mResolver;
const ClientInfo mClientInfo;
const Maybe<ServiceWorkerDescriptor> mController;
nsCOMPtr<nsICSPEventListener> mCSPEventListener;
SafeRefPtr<InternalRequest> mRequest;
UniquePtr<SerializedStackHolder> mOriginStack;
public:
MainThreadFetchRunnable(WorkerFetchResolver* aResolver,
const ClientInfo& aClientInfo,
const Maybe<ServiceWorkerDescriptor>& aController,
nsICSPEventListener* aCSPEventListener,
SafeRefPtr<InternalRequest> aRequest,
UniquePtr<SerializedStackHolder>&& aOriginStack)
: Runnable("dom::MainThreadFetchRunnable"),
mResolver(aResolver),
mClientInfo(aClientInfo),
mController(aController),
mCSPEventListener(aCSPEventListener),
mRequest(std::move(aRequest)),
mOriginStack(std::move(aOriginStack)) {
MOZ_ASSERT(mResolver);
}
NS_IMETHOD
Run() override {
AssertIsOnMainThread();
RefPtr<FetchDriver> fetch;
RefPtr<PromiseWorkerProxy> proxy = mResolver->PromiseProxy();
{
// Acquire the proxy mutex while getting data from the WorkerPrivate...
MutexAutoLock lock(proxy->Lock());
if (proxy->CleanedUp()) {
NS_WARNING("Aborting Fetch because worker already shut down");
return NS_OK;
}
WorkerPrivate* workerPrivate = proxy->GetWorkerPrivate();
MOZ_ASSERT(workerPrivate);
nsCOMPtr<nsIPrincipal> principal = workerPrivate->GetPrincipal();
MOZ_ASSERT(principal);
nsCOMPtr<nsILoadGroup> loadGroup = workerPrivate->GetLoadGroup();
MOZ_ASSERT(loadGroup);
// We don't track if a worker is spawned from a tracking script for now,
// so pass false as the last argument to FetchDriver().
fetch = new FetchDriver(mRequest.clonePtr(), principal, loadGroup,
workerPrivate->MainThreadEventTarget(),
workerPrivate->CookieJarSettings(),
workerPrivate->GetPerformanceStorage(), false);
nsAutoCString spec;
if (proxy->GetWorkerPrivate()->GetBaseURI()) {
proxy->GetWorkerPrivate()->GetBaseURI()->GetAsciiSpec(spec);
}
fetch->SetWorkerScript(spec);
fetch->SetClientInfo(mClientInfo);
fetch->SetController(mController);
fetch->SetCSPEventListener(mCSPEventListener);
}
fetch->SetOriginStack(std::move(mOriginStack));
RefPtr<AbortSignalImpl> signalImpl =
mResolver->GetAbortSignalForMainThread();
// ...but release it before calling Fetch, because mResolver's callback can
// be called synchronously and they want the mutex, too.
return fetch->Fetch(signalImpl, mResolver);
}
};
already_AddRefed<Promise> FetchRequest(nsIGlobalObject* aGlobal,
const RequestOrUSVString& aInput,
const RequestInit& aInit,
CallerType aCallerType,
ErrorResult& aRv) {
RefPtr<Promise> p = Promise::Create(aGlobal, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
MOZ_ASSERT(aGlobal);
// Double check that we have chrome privileges if the Request's content
// policy type has been overridden.
MOZ_ASSERT_IF(aInput.IsRequest() &&
aInput.GetAsRequest().IsContentPolicyTypeOverridden(),
aCallerType == CallerType::System);
AutoJSAPI jsapi;
if (!jsapi.Init(aGlobal)) {
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
return nullptr;
}
JSContext* cx = jsapi.cx();
JS::Rooted<JSObject*> jsGlobal(cx, aGlobal->GetGlobalJSObject());
GlobalObject global(cx, jsGlobal);
SafeRefPtr<Request> request =
Request::Constructor(global, aInput, aInit, aRv);
if (aRv.Failed()) {
return nullptr;
}
SafeRefPtr<InternalRequest> r = request->GetInternalRequest();
// Restore information of InterceptedHttpChannel if they are passed with the
// Request. Since Request::Constructor would not copy these members.
if (aInput.IsRequest()) {
RefPtr<Request> inputReq = &aInput.GetAsRequest();
SafeRefPtr<InternalRequest> inputInReq = inputReq->GetInternalRequest();
if (inputInReq->GetInterceptionTriggeringPrincipalInfo()) {
r->SetInterceptionContentPolicyType(
inputInReq->InterceptionContentPolicyType());
r->SetInterceptionTriggeringPrincipalInfo(
MakeUnique<mozilla::ipc::PrincipalInfo>(
*(inputInReq->GetInterceptionTriggeringPrincipalInfo().get())));
if (!inputInReq->InterceptionRedirectChain().IsEmpty()) {
r->SetInterceptionRedirectChain(
inputInReq->InterceptionRedirectChain());
}
r->SetInterceptionFromThirdParty(
inputInReq->InterceptionFromThirdParty());
}
}
RefPtr<AbortSignalImpl> signalImpl = request->GetSignalImpl();
if (signalImpl && signalImpl->Aborted()) {
// Already aborted signal rejects immediately.
aRv.Throw(NS_ERROR_DOM_ABORT_ERR);
return nullptr;
}
JS::Realm* realm = JS::GetCurrentRealmOrNull(cx);
if (realm && JS::GetDebuggerObservesWasm(realm)) {
r->SetSkipWasmCaching();
}
RefPtr<FetchObserver> observer;
if (aInit.mObserve.WasPassed()) {
observer = new FetchObserver(aGlobal, signalImpl);
aInit.mObserve.Value().HandleEvent(*observer);
}
if (NS_IsMainThread()) {
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobal);
nsCOMPtr<Document> doc;
nsCOMPtr<nsILoadGroup> loadGroup;
nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
nsIPrincipal* principal;
bool isTrackingFetch = false;
if (window) {
doc = window->GetExtantDoc();
if (!doc) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
principal = doc->NodePrincipal();
loadGroup = doc->GetDocumentLoadGroup();
cookieJarSettings = doc->CookieJarSettings();
isTrackingFetch = doc->IsScriptTracking(cx);
} else {
principal = aGlobal->PrincipalOrNull();
if (NS_WARN_IF(!principal)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
cookieJarSettings = mozilla::net::CookieJarSettings::Create(principal);
}
if (!loadGroup) {
nsresult rv = NS_NewLoadGroup(getter_AddRefs(loadGroup), principal);
if (NS_WARN_IF(NS_FAILED(rv))) {
aRv.Throw(rv);
return nullptr;
}
}
RefPtr<MainThreadFetchResolver> resolver = new MainThreadFetchResolver(
p, observer, signalImpl, request->MozErrors());
RefPtr<FetchDriver> fetch =
new FetchDriver(std::move(r), principal, loadGroup,
aGlobal->EventTargetFor(TaskCategory::Other),
cookieJarSettings, nullptr, // PerformanceStorage
isTrackingFetch);
fetch->SetDocument(doc);
resolver->SetLoadGroup(loadGroup);
aRv = fetch->Fetch(signalImpl, resolver);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
} else {
WorkerPrivate* worker = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(worker);
if (worker->IsServiceWorker()) {
r->SetSkipServiceWorker();
}
RefPtr<WorkerFetchResolver> resolver =
WorkerFetchResolver::Create(worker, p, signalImpl, observer);
if (!resolver) {
NS_WARNING("Could not keep the worker alive.");
aRv.Throw(NS_ERROR_DOM_ABORT_ERR);
return nullptr;
}
Maybe<ClientInfo> clientInfo(worker->GlobalScope()->GetClientInfo());
if (clientInfo.isNothing()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
UniquePtr<SerializedStackHolder> stack;
if (worker->IsWatchedByDevTools()) {
stack = GetCurrentStackForNetMonitor(cx);
}
RefPtr<MainThreadFetchRunnable> run = new MainThreadFetchRunnable(
resolver, clientInfo.ref(), worker->GlobalScope()->GetController(),
worker->CSPEventListener(), std::move(r), std::move(stack));
worker->DispatchToMainThread(run.forget());
}
return p.forget();
}
class ResolveFetchPromise : public Runnable {
public:
ResolveFetchPromise(Promise* aPromise, Response* aResponse)
: Runnable("ResolveFetchPromise"),
mPromise(aPromise),
mResponse(aResponse) {}
NS_IMETHOD Run() override {
mPromise->MaybeResolve(mResponse);
return NS_OK;
}
RefPtr<Promise> mPromise;
RefPtr<Response> mResponse;
};
void MainThreadFetchResolver::OnResponseAvailableInternal(
SafeRefPtr<InternalResponse> aResponse) {
NS_ASSERT_OWNINGTHREAD(MainThreadFetchResolver);
AssertIsOnMainThread();
if (aResponse->Type() != ResponseType::Error) {
nsCOMPtr<nsIGlobalObject> go = mPromise->GetParentObject();
nsCOMPtr<nsPIDOMWindowInner> inner = do_QueryInterface(go);
// Notify the document when a fetch completes successfully. This is
// used by the password manager as a hint to observe DOM mutations.
// Call this prior to setting state to Complete so we can set up the
// observer before mutations occurs.
Document* doc = inner ? inner->GetExtantDoc() : nullptr;
if (doc) {
doc->NotifyFetchOrXHRSuccess();
}
if (mFetchObserver) {
mFetchObserver->SetState(FetchState::Complete);
}
mResponse = new Response(go, std::move(aResponse), mSignalImpl);
BrowsingContext* bc = inner ? inner->GetBrowsingContext() : nullptr;
bc = bc ? bc->Top() : nullptr;
if (bc && bc->IsLoading()) {
bc->AddDeprioritizedLoadRunner(
new ResolveFetchPromise(mPromise, mResponse));
} else {
mPromise->MaybeResolve(mResponse);
}
} else {
if (mFetchObserver) {
mFetchObserver->SetState(FetchState::Errored);
}
if (mMozErrors) {
mPromise->MaybeReject(aResponse->GetErrorCode());
return;
}
mPromise->MaybeRejectWithTypeError<MSG_FETCH_FAILED>();
}
}
bool MainThreadFetchResolver::NeedOnDataAvailable() {
NS_ASSERT_OWNINGTHREAD(MainThreadFetchResolver);
return !!mFetchObserver;
}
void MainThreadFetchResolver::OnDataAvailable() {
NS_ASSERT_OWNINGTHREAD(MainThreadFetchResolver);
AssertIsOnMainThread();
if (!mFetchObserver) {
return;
}
if (mFetchObserver->State() == FetchState::Requesting) {
mFetchObserver->SetState(FetchState::Responding);
}
}
MainThreadFetchResolver::~MainThreadFetchResolver() {
NS_ASSERT_OWNINGTHREAD(MainThreadFetchResolver);
}
class WorkerFetchResponseRunnable final : public MainThreadWorkerRunnable {
RefPtr<WorkerFetchResolver> mResolver;
// Passed from main thread to worker thread after being initialized.
SafeRefPtr<InternalResponse> mInternalResponse;
public:
WorkerFetchResponseRunnable(WorkerPrivate* aWorkerPrivate,
WorkerFetchResolver* aResolver,
SafeRefPtr<InternalResponse> aResponse)
: MainThreadWorkerRunnable(aWorkerPrivate),
mResolver(aResolver),
mInternalResponse(std::move(aResponse)) {
MOZ_ASSERT(mResolver);
}
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override {
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
RefPtr<Promise> promise = mResolver->WorkerPromise(aWorkerPrivate);
RefPtr<FetchObserver> fetchObserver =
mResolver->GetFetchObserver(aWorkerPrivate);
if (mInternalResponse->Type() != ResponseType::Error) {
if (fetchObserver) {
fetchObserver->SetState(FetchState::Complete);
}
RefPtr<nsIGlobalObject> global = aWorkerPrivate->GlobalScope();
RefPtr<Response> response =
new Response(global, mInternalResponse.clonePtr(),
mResolver->GetAbortSignalForTargetThread());
promise->MaybeResolve(response);
} else {
if (fetchObserver) {
fetchObserver->SetState(FetchState::Errored);
}
promise->MaybeRejectWithTypeError<MSG_FETCH_FAILED>();
}
return true;
}
};
class WorkerDataAvailableRunnable final : public MainThreadWorkerRunnable {
RefPtr<WorkerFetchResolver> mResolver;
public:
WorkerDataAvailableRunnable(WorkerPrivate* aWorkerPrivate,
WorkerFetchResolver* aResolver)
: MainThreadWorkerRunnable(aWorkerPrivate), mResolver(aResolver) {}
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override {
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
RefPtr<FetchObserver> fetchObserver =
mResolver->GetFetchObserver(aWorkerPrivate);
if (fetchObserver && fetchObserver->State() == FetchState::Requesting) {
fetchObserver->SetState(FetchState::Responding);
}
return true;
}
};
class WorkerFetchResponseEndBase {
protected:
RefPtr<WorkerFetchResolver> mResolver;
public:
explicit WorkerFetchResponseEndBase(WorkerFetchResolver* aResolver)
: mResolver(aResolver) {
MOZ_ASSERT(aResolver);
}
void WorkerRunInternal(WorkerPrivate* aWorkerPrivate) {
mResolver->Shutdown(aWorkerPrivate);
}
};
class WorkerFetchResponseEndRunnable final : public MainThreadWorkerRunnable,
public WorkerFetchResponseEndBase {
FetchDriverObserver::EndReason mReason;
public:
WorkerFetchResponseEndRunnable(WorkerPrivate* aWorkerPrivate,
WorkerFetchResolver* aResolver,
FetchDriverObserver::EndReason aReason)
: MainThreadWorkerRunnable(aWorkerPrivate),
WorkerFetchResponseEndBase(aResolver),
mReason(aReason) {}
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override {
if (mResolver->IsShutdown(aWorkerPrivate)) {
return true;
}
if (mReason == FetchDriverObserver::eAborted) {
mResolver->WorkerPromise(aWorkerPrivate)
->MaybeReject(NS_ERROR_DOM_ABORT_ERR);
}
WorkerRunInternal(aWorkerPrivate);
return true;
}
nsresult Cancel() override {
// We need to check first if cancel is called twice
nsresult rv = WorkerRunnable::Cancel();
NS_ENSURE_SUCCESS(rv, rv);
// Execute Run anyway to make sure we cleanup our promise proxy to avoid
// leaking the worker thread
Run();
return NS_OK;
}
};
class WorkerFetchResponseEndControlRunnable final
: public MainThreadWorkerControlRunnable,
public WorkerFetchResponseEndBase {
public:
WorkerFetchResponseEndControlRunnable(WorkerPrivate* aWorkerPrivate,
WorkerFetchResolver* aResolver)
: MainThreadWorkerControlRunnable(aWorkerPrivate),
WorkerFetchResponseEndBase(aResolver) {}
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override {
WorkerRunInternal(aWorkerPrivate);
return true;
}
// Control runnable cancel already calls Run().
};
void WorkerFetchResolver::OnResponseAvailableInternal(
SafeRefPtr<InternalResponse> aResponse) {
AssertIsOnMainThread();
MutexAutoLock lock(mPromiseProxy->Lock());
if (mPromiseProxy->CleanedUp()) {
return;
}
RefPtr<WorkerFetchResponseRunnable> r = new WorkerFetchResponseRunnable(
mPromiseProxy->GetWorkerPrivate(), this, std::move(aResponse));
if (!r->Dispatch()) {
NS_WARNING("Could not dispatch fetch response");
}
}
bool WorkerFetchResolver::NeedOnDataAvailable() {
AssertIsOnMainThread();
return mNeedOnDataAvailable;
}
void WorkerFetchResolver::OnDataAvailable() {
AssertIsOnMainThread();
MutexAutoLock lock(mPromiseProxy->Lock());
if (mPromiseProxy->CleanedUp()) {
return;
}
RefPtr<WorkerDataAvailableRunnable> r =
new WorkerDataAvailableRunnable(mPromiseProxy->GetWorkerPrivate(), this);
Unused << r->Dispatch();
}
void WorkerFetchResolver::OnResponseEnd(
FetchDriverObserver::EndReason aReason) {
AssertIsOnMainThread();
MutexAutoLock lock(mPromiseProxy->Lock());
if (mPromiseProxy->CleanedUp()) {
return;
}
FlushConsoleReport();
RefPtr<WorkerFetchResponseEndRunnable> r = new WorkerFetchResponseEndRunnable(
mPromiseProxy->GetWorkerPrivate(), this, aReason);
if (!r->Dispatch()) {
RefPtr<WorkerFetchResponseEndControlRunnable> cr =
new WorkerFetchResponseEndControlRunnable(
mPromiseProxy->GetWorkerPrivate(), this);
// This can fail if the worker thread is canceled or killed causing
// the PromiseWorkerProxy to give up its WorkerRef immediately,
// allowing the worker thread to become Dead.
if (!cr->Dispatch()) {
NS_WARNING("Failed to dispatch WorkerFetchResponseEndControlRunnable");
}
}
}
void WorkerFetchResolver::FlushConsoleReport() {
AssertIsOnMainThread();
MOZ_ASSERT(mPromiseProxy);
if (!mReporter) {
return;
}
WorkerPrivate* worker = mPromiseProxy->GetWorkerPrivate();
if (!worker) {
mReporter->FlushReportsToConsole(0);
return;
}
if (worker->IsServiceWorker()) {
// Flush to service worker
mReporter->FlushReportsToConsoleForServiceWorkerScope(
worker->ServiceWorkerScope());
return;
}
if (worker->IsSharedWorker()) {
// Flush to shared worker
worker->GetRemoteWorkerController()->FlushReportsOnMainThread(mReporter);
return;
}
// Flush to dedicated worker
mReporter->FlushConsoleReports(worker->GetLoadGroup());
}
nsresult ExtractByteStreamFromBody(const fetch::OwningBodyInit& aBodyInit,
nsIInputStream** aStream,
nsCString& aContentTypeWithCharset,
uint64_t& aContentLength) {
MOZ_ASSERT(aStream);
nsAutoCString charset;
aContentTypeWithCharset.SetIsVoid(true);
if (aBodyInit.IsArrayBuffer()) {
BodyExtractor<const ArrayBuffer> body(&aBodyInit.GetAsArrayBuffer());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsArrayBufferView()) {
BodyExtractor<const ArrayBufferView> body(
&aBodyInit.GetAsArrayBufferView());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsBlob()) {
Blob& blob = aBodyInit.GetAsBlob();
BodyExtractor<const Blob> body(&blob);
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsFormData()) {
FormData& formData = aBodyInit.GetAsFormData();
BodyExtractor<const FormData> body(&formData);
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsUSVString()) {
BodyExtractor<const nsAString> body(&aBodyInit.GetAsUSVString());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsURLSearchParams()) {
URLSearchParams& usp = aBodyInit.GetAsURLSearchParams();
BodyExtractor<const URLSearchParams> body(&usp);
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
MOZ_ASSERT_UNREACHABLE("Should never reach here");
return NS_ERROR_FAILURE;
}
nsresult ExtractByteStreamFromBody(const fetch::BodyInit& aBodyInit,
nsIInputStream** aStream,
nsCString& aContentTypeWithCharset,
uint64_t& aContentLength) {
MOZ_ASSERT(aStream);
MOZ_ASSERT(!*aStream);
nsAutoCString charset;
aContentTypeWithCharset.SetIsVoid(true);
if (aBodyInit.IsArrayBuffer()) {
BodyExtractor<const ArrayBuffer> body(&aBodyInit.GetAsArrayBuffer());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsArrayBufferView()) {
BodyExtractor<const ArrayBufferView> body(
&aBodyInit.GetAsArrayBufferView());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsBlob()) {
BodyExtractor<const Blob> body(&aBodyInit.GetAsBlob());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsFormData()) {
BodyExtractor<const FormData> body(&aBodyInit.GetAsFormData());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsUSVString()) {
BodyExtractor<const nsAString> body(&aBodyInit.GetAsUSVString());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsURLSearchParams()) {
BodyExtractor<const URLSearchParams> body(
&aBodyInit.GetAsURLSearchParams());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
MOZ_ASSERT_UNREACHABLE("Should never reach here");
return NS_ERROR_FAILURE;
}
nsresult ExtractByteStreamFromBody(const fetch::ResponseBodyInit& aBodyInit,
nsIInputStream** aStream,
nsCString& aContentTypeWithCharset,
uint64_t& aContentLength) {
MOZ_ASSERT(aStream);
MOZ_ASSERT(!*aStream);
// ReadableStreams should be handled by
// BodyExtractorReadableStream::GetAsStream.
MOZ_ASSERT(!aBodyInit.IsReadableStream());
nsAutoCString charset;
aContentTypeWithCharset.SetIsVoid(true);
if (aBodyInit.IsArrayBuffer()) {
BodyExtractor<const ArrayBuffer> body(&aBodyInit.GetAsArrayBuffer());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsArrayBufferView()) {
BodyExtractor<const ArrayBufferView> body(
&aBodyInit.GetAsArrayBufferView());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsBlob()) {
BodyExtractor<const Blob> body(&aBodyInit.GetAsBlob());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsFormData()) {
BodyExtractor<const FormData> body(&aBodyInit.GetAsFormData());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsUSVString()) {
BodyExtractor<const nsAString> body(&aBodyInit.GetAsUSVString());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
if (aBodyInit.IsURLSearchParams()) {
BodyExtractor<const URLSearchParams> body(
&aBodyInit.GetAsURLSearchParams());
return body.GetAsStream(aStream, &aContentLength, aContentTypeWithCharset,
charset);
}
MOZ_ASSERT_UNREACHABLE("Should never reach here");
return NS_ERROR_FAILURE;
}
template <class Derived>
FetchBody<Derived>::FetchBody(nsIGlobalObject* aOwner)
: mOwner(aOwner),
mReadableStreamBody(nullptr),
mReadableStreamReader(nullptr),
mBodyUsed(false) {
MOZ_ASSERT(aOwner);
if (!NS_IsMainThread()) {
WorkerPrivate* wp = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(wp);
mMainThreadEventTarget = wp->MainThreadEventTarget();
} else {
mMainThreadEventTarget = aOwner->EventTargetFor(TaskCategory::Other);
}
MOZ_ASSERT(mMainThreadEventTarget);
}
template FetchBody<Request>::FetchBody(nsIGlobalObject* aOwner);
template FetchBody<Response>::FetchBody(nsIGlobalObject* aOwner);
template <class Derived>
FetchBody<Derived>::~FetchBody() {
Unfollow();
}
template FetchBody<Request>::~FetchBody();
template FetchBody<Response>::~FetchBody();
template <class Derived>
bool FetchBody<Derived>::GetBodyUsed(ErrorResult& aRv) const {
if (mBodyUsed) {
return true;
}
// If this stream is disturbed, return true.
if (mReadableStreamBody) {
return mReadableStreamBody->Disturbed();
}
return false;
}
template bool FetchBody<Request>::GetBodyUsed(ErrorResult&) const;
template bool FetchBody<Response>::GetBodyUsed(ErrorResult&) const;
template <class Derived>
bool FetchBody<Derived>::CheckBodyUsed() const {
IgnoredErrorResult result;
bool bodyUsed = GetBodyUsed(result);
if (result.Failed()) {
// Ignore the error.
return true;
}
return bodyUsed;
}
template bool FetchBody<Request>::CheckBodyUsed() const;
template bool FetchBody<Response>::CheckBodyUsed() const;
template <class Derived>
void FetchBody<Derived>::SetBodyUsed(JSContext* aCx, ErrorResult& aRv) {
MOZ_ASSERT(aCx);
MOZ_ASSERT(mOwner->EventTargetFor(TaskCategory::Other)->IsOnCurrentThread());
if (mBodyUsed) {
return;
}
mBodyUsed = true;
// If we already have a ReadableStreamBody and it has been created by DOM, we
// have to lock it now because it can have been shared with other objects.
if (mReadableStreamBody) {
if (mReadableStreamBody->HasNativeUnderlyingSource()) {
LockStream(aCx, mReadableStreamBody, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
} else {
MOZ_ASSERT(mFetchStreamReader);
// Let's activate the FetchStreamReader.
RefPtr<ReadableStreamDefaultReader> reader;
mFetchStreamReader->StartConsuming(aCx, mReadableStreamBody,
getter_AddRefs(reader), aRv);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
mReadableStreamReader = reader.forget();
}
}
}
template void FetchBody<Request>::SetBodyUsed(JSContext* aCx, ErrorResult& aRv);
template void FetchBody<Response>::SetBodyUsed(JSContext* aCx,
ErrorResult& aRv);
template <class Derived>
already_AddRefed<Promise> FetchBody<Derived>::ConsumeBody(
JSContext* aCx, BodyConsumer::ConsumeType aType, ErrorResult& aRv) {
aRv.MightThrowJSException();
RefPtr<AbortSignalImpl> signalImpl =
DerivedClass()->GetSignalImplToConsumeBody();
if (signalImpl && signalImpl->Aborted()) {
aRv.Throw(NS_ERROR_DOM_ABORT_ERR);
return nullptr;
}
bool bodyUsed = GetBodyUsed(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
if (bodyUsed) {
aRv.ThrowTypeError<MSG_FETCH_BODY_CONSUMED_ERROR>();
return nullptr;
}
nsAutoCString mimeType;
nsAutoCString mixedCaseMimeType;
DerivedClass()->GetMimeType(mimeType, mixedCaseMimeType);
// Null bodies are a special-case in the fetch spec. The Body mix-in can only
// be "disturbed" or "locked" if its associated "body" is non-null.
// Additionally, the Body min-in's "consume body" algorithm explicitly creates
// a fresh empty ReadableStream object in step 2. This means that `bodyUsed`
// will never return true for a null body.
//
// To this end, we create a fresh (empty) body every time a request is made
// and consume its body here, without marking this FetchBody consumed via
// SetBodyUsed.
nsCOMPtr<nsIInputStream> bodyStream;
DerivedClass()->GetBody(getter_AddRefs(bodyStream));
if (!bodyStream) {
RefPtr<EmptyBody> emptyBody =
EmptyBody::Create(DerivedClass()->GetParentObject(),
DerivedClass()->GetPrincipalInfo().get(), signalImpl,
mimeType, mixedCaseMimeType, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
return emptyBody->ConsumeBody(aCx, aType, aRv);
}
SetBodyUsed(aCx, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
nsCOMPtr<nsIGlobalObject> global = DerivedClass()->GetParentObject();
MutableBlobStorage::MutableBlobStorageType blobStorageType =
MutableBlobStorage::eOnlyInMemory;
const mozilla::UniquePtr<mozilla::ipc::PrincipalInfo>& principalInfo =
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))) {
blobStorageType = MutableBlobStorage::eCouldBeInTemporaryFile;
}
RefPtr<Promise> promise = BodyConsumer::Create(
global, mMainThreadEventTarget, bodyStream, signalImpl, aType,
BodyBlobURISpec(), BodyLocalPath(), mimeType, mixedCaseMimeType,
blobStorageType, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
return promise.forget();
}
template already_AddRefed<Promise> FetchBody<Request>::ConsumeBody(
JSContext* aCx, BodyConsumer::ConsumeType aType, ErrorResult& aRv);
template already_AddRefed<Promise> FetchBody<Response>::ConsumeBody(
JSContext* aCx, BodyConsumer::ConsumeType aType, ErrorResult& aRv);
template already_AddRefed<Promise> FetchBody<EmptyBody>::ConsumeBody(
JSContext* aCx, BodyConsumer::ConsumeType aType, ErrorResult& aRv);
template <class Derived>
void FetchBody<Derived>::GetMimeType(nsACString& aMimeType,
nsACString& aMixedCaseMimeType) {
ErrorResult result;
nsAutoCString contentTypeValues, contentTypeUtf8;
MOZ_ASSERT(DerivedClass()->GetInternalHeaders());
DerivedClass()->GetInternalHeaders()->Get("Content-Type"_ns,
contentTypeValues, result);
MOZ_ALWAYS_TRUE(!result.Failed());
nsCCharSeparatedTokenizer contentTypeTokens(contentTypeValues, ',');
// currently we extract the MIME-type from the first content type header
// In order to fully comply with the fetch spec we must be able to
// parse multiple content-type headers and extrace headers from it
// To achieve this we need to modify CMimeType::Parse and implement the
// This issue is tracked by
auto contentStr = contentTypeTokens.nextToken();
CopyLatin1toUTF8(contentStr, contentTypeUtf8);
UniquePtr<CMimeType> contentTypeRecord = CMimeType::Parse(contentTypeUtf8);
if (contentTypeRecord) {
contentTypeRecord->Serialize(aMixedCaseMimeType);
// validate invalid/empty parameter checks
// CMimeType::Parse parses the parameters and discards ill-formed parameters
// If we have invalid/illformed paramters we need to discard the parsed
// mime-type
if (contentStr.Contains(';') && !aMixedCaseMimeType.Contains(';')) {
// parameters were discarded after parsing.
// This should result in invalid MimeType
aMixedCaseMimeType = "";
}
aMimeType = aMixedCaseMimeType;
ToLowerCase(aMimeType);
}
}
template void FetchBody<Request>::GetMimeType(nsACString& aMimeType,
nsACString& aMixedCaseMimeType);
template void FetchBody<Response>::GetMimeType(nsACString& aMimeType,
nsACString& aMixedCaseMimeType);
template <class Derived>
const nsACString& FetchBody<Derived>::BodyBlobURISpec() const {
return DerivedClass()->BodyBlobURISpec();
}
template const nsACString& FetchBody<Request>::BodyBlobURISpec() const;
template const nsACString& FetchBody<Response>::BodyBlobURISpec() const;
template const nsACString& FetchBody<EmptyBody>::BodyBlobURISpec() const;
template <class Derived>
const nsAString& FetchBody<Derived>::BodyLocalPath() const {
return DerivedClass()->BodyLocalPath();
}
template const nsAString& FetchBody<Request>::BodyLocalPath() const;
template const nsAString& FetchBody<Response>::BodyLocalPath() const;
template const nsAString& FetchBody<EmptyBody>::BodyLocalPath() const;
template <class Derived>
void FetchBody<Derived>::SetReadableStreamBody(JSContext* aCx,
ReadableStream* aBody) {
MOZ_ASSERT(!mReadableStreamBody);
MOZ_ASSERT(aBody);
mReadableStreamBody = aBody;
RefPtr<AbortSignalImpl> signalImpl = DerivedClass()->GetSignalImpl();
if (!signalImpl) {
return;
}
bool aborted = signalImpl->Aborted();
if (aborted) {
IgnoredErrorResult result;
AbortStream(aCx, mReadableStreamBody, result);
if (NS_WARN_IF(result.Failed())) {
return;
}
} else if (!IsFollowing()) {
Follow(signalImpl);
}
}
template void FetchBody<Request>::SetReadableStreamBody(JSContext* aCx,
ReadableStream* aBody);
template void FetchBody<Response>::SetReadableStreamBody(JSContext* aCx,
ReadableStream* aBody);
template <class Derived>
already_AddRefed<ReadableStream> FetchBody<Derived>::GetBody(JSContext* aCx,
ErrorResult& aRv) {
if (mReadableStreamBody) {
RefPtr<ReadableStream> body(mReadableStreamBody);
return body.forget();
}
nsCOMPtr<nsIInputStream> inputStream;
DerivedClass()->GetBody(getter_AddRefs(inputStream));
if (!inputStream) {
return nullptr;
}
BodyStream::Create(aCx, this, DerivedClass()->GetParentObject(), inputStream,
aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
MOZ_ASSERT(mReadableStreamBody);
RefPtr<ReadableStream> body(mReadableStreamBody);
// If the body has been already consumed, we lock the stream.
bool bodyUsed = GetBodyUsed(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
if (bodyUsed) {
LockStream(aCx, body, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
}
RefPtr<AbortSignalImpl> signalImpl = DerivedClass()->GetSignalImpl();
if (signalImpl) {
if (signalImpl->Aborted()) {
AbortStream(aCx, body, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
} else if (!IsFollowing()) {
Follow(signalImpl);
}
}
return body.forget();
}
template already_AddRefed<ReadableStream> FetchBody<Request>::GetBody(
JSContext* aCx, ErrorResult& aRv);
template already_AddRefed<ReadableStream> FetchBody<Response>::GetBody(
JSContext* aCx, ErrorResult& aRv);
template <class Derived>
void FetchBody<Derived>::LockStream(JSContext* aCx, ReadableStream* aStream,
ErrorResult& aRv) {
// This is native stream, creating a reader will not execute any JS code.
RefPtr<ReadableStreamDefaultReader> reader =
AcquireReadableStreamDefaultReader(aStream, aRv);
if (aRv.Failed()) {
return;
}
mReadableStreamReader = reader;
}
template void FetchBody<Request>::LockStream(JSContext* aCx,
ReadableStream* aStream,
ErrorResult& aRv);
template void FetchBody<Response>::LockStream(JSContext* aCx,
ReadableStream* aStream,
ErrorResult& aRv);
template <class Derived>
void FetchBody<Derived>::MaybeTeeReadableStreamBody(
JSContext* aCx, ReadableStream** aBodyOut,
FetchStreamReader** aStreamReader, nsIInputStream** aInputStream,
ErrorResult& aRv) {
MOZ_DIAGNOSTIC_ASSERT(aStreamReader);
MOZ_DIAGNOSTIC_ASSERT(aInputStream);
MOZ_DIAGNOSTIC_ASSERT(!CheckBodyUsed());
*aBodyOut = nullptr;
*aStreamReader = nullptr;
*aInputStream = nullptr;
if (!mReadableStreamBody) {
return;
}
// If this is a ReadableStream with an native source, this has been
// generated by a Fetch. In this case, Fetch will be able to recreate it
// again when GetBody() is called.
if (mReadableStreamBody->HasNativeUnderlyingSource()) {
*aBodyOut = nullptr;
return;
}
nsTArray<RefPtr<ReadableStream> > branches;
MOZ_KnownLive(mReadableStreamBody)->Tee(aCx, branches, aRv);
if (aRv.Failed()) {
return;
}
mReadableStreamBody = branches[0];
branches[1].forget(aBodyOut);
aRv = FetchStreamReader::Create(aCx, mOwner, aStreamReader, aInputStream);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
}
template void FetchBody<Request>::MaybeTeeReadableStreamBody(
JSContext* aCx, ReadableStream** aBodyOut,
FetchStreamReader** aStreamReader, nsIInputStream** aInputStream,
ErrorResult& aRv);
template void FetchBody<Response>::MaybeTeeReadableStreamBody(
JSContext* aCx, ReadableStream** aBodyOut,
FetchStreamReader** aStreamReader, nsIInputStream** aInputStream,
ErrorResult& aRv);
template <class Derived>
void FetchBody<Derived>::RunAbortAlgorithm() {
if (!mReadableStreamBody) {
return;
}
AutoJSAPI jsapi;
if (!jsapi.Init(mOwner)) {
return;
}
JSContext* cx = jsapi.cx();