mirror of
https://github.com/mozilla/gecko-dev.git
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d225f7151b
(Path is actually r=froydnj.) Bug 1400459 devirtualized nsIAtom so that it is no longer a subclass of nsISupports. This means that nsAtom is now a better name for it than nsIAtom. MozReview-Commit-ID: 91U22X2NydP --HG-- rename : xpcom/ds/nsIAtom.h => xpcom/ds/nsAtom.h extra : rebase_source : ac3e904a21b8b48e74534fff964f1623ee937c67
636 lines
16 KiB
C++
636 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsDOMDataChannel.h"
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#include "base/basictypes.h"
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#include "mozilla/Logging.h"
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#include "nsDOMDataChannelDeclarations.h"
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#include "nsDOMDataChannel.h"
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#include "nsIDOMDataChannel.h"
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#include "mozilla/DOMEventTargetHelper.h"
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#include "mozilla/dom/File.h"
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#include "mozilla/dom/MessageEvent.h"
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#include "mozilla/dom/MessageEventBinding.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "nsError.h"
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#include "nsContentUtils.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsIScriptObjectPrincipal.h"
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#include "nsProxyRelease.h"
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#include "DataChannel.h"
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#include "DataChannelLog.h"
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#undef LOG
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#define LOG(args) MOZ_LOG(mozilla::gDataChannelLog, mozilla::LogLevel::Debug, args)
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// Since we've moved the windows.h include down here, we have to explicitly
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// undef GetBinaryType, otherwise we'll get really odd conflicts
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#ifdef GetBinaryType
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#undef GetBinaryType
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#endif
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using namespace mozilla;
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using namespace mozilla::dom;
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nsDOMDataChannel::~nsDOMDataChannel()
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{
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// Don't call us anymore! Likely isn't an issue (or maybe just less of
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// one) once we block GC until all the (appropriate) onXxxx handlers
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// are dropped. (See WebRTC spec)
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LOG(("%p: Close()ing %p", this, mDataChannel.get()));
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mDataChannel->SetListener(nullptr, nullptr);
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mDataChannel->Close();
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}
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/* virtual */ JSObject*
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nsDOMDataChannel::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return DataChannelBinding::Wrap(aCx, this, aGivenProto);
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(nsDOMDataChannel)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsDOMDataChannel,
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DOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(nsDOMDataChannel,
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DOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_ADDREF_INHERITED(nsDOMDataChannel, DOMEventTargetHelper)
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NS_IMPL_RELEASE_INHERITED(nsDOMDataChannel, DOMEventTargetHelper)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMDataChannel)
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NS_INTERFACE_MAP_ENTRY(nsIDOMDataChannel)
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NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
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nsDOMDataChannel::nsDOMDataChannel(already_AddRefed<mozilla::DataChannel>& aDataChannel,
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nsPIDOMWindowInner* aWindow)
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: DOMEventTargetHelper(aWindow)
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, mDataChannel(aDataChannel)
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, mBinaryType(DC_BINARY_TYPE_BLOB)
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, mCheckMustKeepAlive(true)
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, mSentClose(false)
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{
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}
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nsresult
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nsDOMDataChannel::Init(nsPIDOMWindowInner* aDOMWindow)
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{
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nsresult rv;
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nsAutoString urlParam;
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MOZ_ASSERT(mDataChannel);
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mDataChannel->SetListener(this, nullptr);
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// Now grovel through the objects to get a usable origin for onMessage
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nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aDOMWindow);
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NS_ENSURE_STATE(sgo);
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nsCOMPtr<nsIScriptContext> scriptContext = sgo->GetContext();
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NS_ENSURE_STATE(scriptContext);
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nsCOMPtr<nsIScriptObjectPrincipal> scriptPrincipal(do_QueryInterface(aDOMWindow));
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NS_ENSURE_STATE(scriptPrincipal);
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nsCOMPtr<nsIPrincipal> principal = scriptPrincipal->GetPrincipal();
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NS_ENSURE_STATE(principal);
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// Attempt to kill "ghost" DataChannel (if one can happen): but usually too early for check to fail
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rv = CheckInnerWindowCorrectness();
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NS_ENSURE_SUCCESS(rv,rv);
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rv = nsContentUtils::GetUTFOrigin(principal,mOrigin);
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LOG(("%s: origin = %s\n",__FUNCTION__,NS_LossyConvertUTF16toASCII(mOrigin).get()));
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return rv;
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}
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// Most of the GetFoo()/SetFoo()s don't need to touch shared resources and
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// are safe after Close()
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NS_IMETHODIMP
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nsDOMDataChannel::GetLabel(nsAString& aLabel)
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{
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mDataChannel->GetLabel(aLabel);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDOMDataChannel::GetProtocol(nsAString& aProtocol)
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{
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mDataChannel->GetProtocol(aProtocol);
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return NS_OK;
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}
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uint16_t
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nsDOMDataChannel::Id() const
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{
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return mDataChannel->GetStream();
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}
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NS_IMETHODIMP
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nsDOMDataChannel::GetId(uint16_t *aId)
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{
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*aId = Id();
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return NS_OK;
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}
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// XXX should be GetType()? Open question for the spec
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bool
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nsDOMDataChannel::Reliable() const
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{
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return mDataChannel->GetType() == mozilla::DataChannelConnection::RELIABLE;
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}
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NS_IMETHODIMP
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nsDOMDataChannel::GetReliable(bool* aReliable)
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{
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*aReliable = Reliable();
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return NS_OK;
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}
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bool
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nsDOMDataChannel::Ordered() const
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{
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return mDataChannel->GetOrdered();
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}
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NS_IMETHODIMP
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nsDOMDataChannel::GetOrdered(bool* aOrdered)
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{
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*aOrdered = Ordered();
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return NS_OK;
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}
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RTCDataChannelState
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nsDOMDataChannel::ReadyState() const
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{
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return static_cast<RTCDataChannelState>(mDataChannel->GetReadyState());
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}
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NS_IMETHODIMP
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nsDOMDataChannel::GetReadyState(nsAString& aReadyState)
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{
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// mState is handled on multiple threads and needs locking
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uint16_t readyState = mozilla::DataChannel::CLOSED;
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if (!mSentClose) {
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readyState = mDataChannel->GetReadyState();
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}
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// From the WebRTC spec
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const char * stateName[] = {
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"connecting",
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"open",
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"closing",
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"closed"
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};
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MOZ_ASSERT(/*readyState >= mozilla::DataChannel::CONNECTING && */ // Always true due to datatypes
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readyState <= mozilla::DataChannel::CLOSED);
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aReadyState.AssignASCII(stateName[readyState]);
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return NS_OK;
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}
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uint32_t
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nsDOMDataChannel::BufferedAmount() const
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{
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if (!mSentClose) {
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return mDataChannel->GetBufferedAmount();
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}
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return 0;
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}
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uint32_t
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nsDOMDataChannel::BufferedAmountLowThreshold() const
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{
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return mDataChannel->GetBufferedAmountLowThreshold();
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}
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NS_IMETHODIMP
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nsDOMDataChannel::GetBufferedAmount(uint32_t* aBufferedAmount)
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{
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*aBufferedAmount = BufferedAmount();
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return NS_OK;
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}
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void
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nsDOMDataChannel::SetBufferedAmountLowThreshold(uint32_t aThreshold)
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{
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mDataChannel->SetBufferedAmountLowThreshold(aThreshold);
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}
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NS_IMETHODIMP nsDOMDataChannel::GetBinaryType(nsAString & aBinaryType)
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{
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switch (mBinaryType) {
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case DC_BINARY_TYPE_ARRAYBUFFER:
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aBinaryType.AssignLiteral("arraybuffer");
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break;
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case DC_BINARY_TYPE_BLOB:
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aBinaryType.AssignLiteral("blob");
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break;
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default:
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NS_ERROR("Should not happen");
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDOMDataChannel::SetBinaryType(const nsAString& aBinaryType)
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{
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if (aBinaryType.EqualsLiteral("arraybuffer")) {
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mBinaryType = DC_BINARY_TYPE_ARRAYBUFFER;
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} else if (aBinaryType.EqualsLiteral("blob")) {
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mBinaryType = DC_BINARY_TYPE_BLOB;
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} else {
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return NS_ERROR_INVALID_ARG;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDOMDataChannel::Close()
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{
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mDataChannel->Close();
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UpdateMustKeepAlive();
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return NS_OK;
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}
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// All of the following is copy/pasted from WebSocket.cpp.
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void
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nsDOMDataChannel::Send(const nsAString& aData, ErrorResult& aRv)
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{
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NS_ConvertUTF16toUTF8 msgString(aData);
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Send(nullptr, msgString, false, aRv);
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}
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void
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nsDOMDataChannel::Send(Blob& aData, ErrorResult& aRv)
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{
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MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
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nsCOMPtr<nsIInputStream> msgStream;
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aData.CreateInputStream(getter_AddRefs(msgStream), aRv);
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if (NS_WARN_IF(aRv.Failed())){
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return;
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}
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uint64_t msgLength = aData.GetSize(aRv);
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if (NS_WARN_IF(aRv.Failed())){
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return;
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}
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if (msgLength > UINT32_MAX) {
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aRv.Throw(NS_ERROR_FILE_TOO_BIG);
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return;
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}
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Send(msgStream, EmptyCString(), true, aRv);
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}
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void
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nsDOMDataChannel::Send(const ArrayBuffer& aData, ErrorResult& aRv)
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{
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MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
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aData.ComputeLengthAndData();
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static_assert(sizeof(*aData.Data()) == 1, "byte-sized data required");
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uint32_t len = aData.Length();
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char* data = reinterpret_cast<char*>(aData.Data());
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nsDependentCSubstring msgString(data, len);
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Send(nullptr, msgString, true, aRv);
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}
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void
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nsDOMDataChannel::Send(const ArrayBufferView& aData, ErrorResult& aRv)
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{
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MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
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aData.ComputeLengthAndData();
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static_assert(sizeof(*aData.Data()) == 1, "byte-sized data required");
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uint32_t len = aData.Length();
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char* data = reinterpret_cast<char*>(aData.Data());
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nsDependentCSubstring msgString(data, len);
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Send(nullptr, msgString, true, aRv);
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}
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void
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nsDOMDataChannel::Send(nsIInputStream* aMsgStream,
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const nsACString& aMsgString,
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bool aIsBinary,
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ErrorResult& aRv)
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{
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MOZ_ASSERT(NS_IsMainThread());
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uint16_t state = mozilla::DataChannel::CLOSED;
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if (!mSentClose) {
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state = mDataChannel->GetReadyState();
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}
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// In reality, the DataChannel protocol allows this, but we want it to
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// look like WebSockets
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if (state == mozilla::DataChannel::CONNECTING) {
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aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
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return;
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}
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if (state == mozilla::DataChannel::CLOSING ||
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state == mozilla::DataChannel::CLOSED) {
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return;
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}
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MOZ_ASSERT(state == mozilla::DataChannel::OPEN,
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"Unknown state in nsDOMDataChannel::Send");
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if (aMsgStream) {
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mDataChannel->SendBinaryStream(aMsgStream, aRv);
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} else {
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if (aIsBinary) {
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mDataChannel->SendBinaryMsg(aMsgString, aRv);
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} else {
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mDataChannel->SendMsg(aMsgString, aRv);
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}
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}
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}
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nsresult
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nsDOMDataChannel::DoOnMessageAvailable(const nsACString& aData,
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bool aBinary)
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{
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MOZ_ASSERT(NS_IsMainThread());
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LOG(("DoOnMessageAvailable%s\n",aBinary ? ((mBinaryType == DC_BINARY_TYPE_BLOB) ? " (blob)" : " (binary)") : ""));
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nsresult rv = CheckInnerWindowCorrectness();
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if (NS_FAILED(rv)) {
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return NS_OK;
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}
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AutoJSAPI jsapi;
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if (NS_WARN_IF(!jsapi.Init(GetOwner()))) {
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return NS_ERROR_FAILURE;
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}
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JSContext* cx = jsapi.cx();
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JS::Rooted<JS::Value> jsData(cx);
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if (aBinary) {
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if (mBinaryType == DC_BINARY_TYPE_BLOB) {
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RefPtr<Blob> blob =
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Blob::CreateStringBlob(GetOwner(), aData, EmptyString());
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MOZ_ASSERT(blob);
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if (!ToJSValue(cx, blob, &jsData)) {
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return NS_ERROR_FAILURE;
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}
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} else if (mBinaryType == DC_BINARY_TYPE_ARRAYBUFFER) {
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JS::Rooted<JSObject*> arrayBuf(cx);
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rv = nsContentUtils::CreateArrayBuffer(cx, aData, arrayBuf.address());
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NS_ENSURE_SUCCESS(rv, rv);
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jsData.setObject(*arrayBuf);
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} else {
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MOZ_CRASH("Unknown binary type!");
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return NS_ERROR_UNEXPECTED;
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}
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} else {
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NS_ConvertUTF8toUTF16 utf16data(aData);
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JSString* jsString = JS_NewUCStringCopyN(cx, utf16data.get(), utf16data.Length());
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NS_ENSURE_TRUE(jsString, NS_ERROR_FAILURE);
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jsData.setString(jsString);
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}
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RefPtr<MessageEvent> event = new MessageEvent(this, nullptr, nullptr);
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event->InitMessageEvent(nullptr, NS_LITERAL_STRING("message"), false, false,
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jsData, mOrigin, EmptyString(), nullptr,
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Sequence<OwningNonNull<MessagePort>>());
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event->SetTrusted(true);
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LOG(("%p(%p): %s - Dispatching\n",this,(void*)mDataChannel,__FUNCTION__));
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bool dummy;
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rv = DispatchEvent(static_cast<Event*>(event), &dummy);
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if (NS_FAILED(rv)) {
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NS_WARNING("Failed to dispatch the message event!!!");
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}
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return rv;
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}
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nsresult
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nsDOMDataChannel::OnMessageAvailable(nsISupports* aContext,
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const nsACString& aMessage)
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{
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MOZ_ASSERT(NS_IsMainThread());
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return DoOnMessageAvailable(aMessage, false);
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}
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nsresult
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nsDOMDataChannel::OnBinaryMessageAvailable(nsISupports* aContext,
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const nsACString& aMessage)
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{
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MOZ_ASSERT(NS_IsMainThread());
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return DoOnMessageAvailable(aMessage, true);
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}
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nsresult
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nsDOMDataChannel::OnSimpleEvent(nsISupports* aContext, const nsAString& aName)
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{
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MOZ_ASSERT(NS_IsMainThread());
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nsresult rv = CheckInnerWindowCorrectness();
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if (NS_FAILED(rv)) {
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return NS_OK;
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}
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RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr);
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event->InitEvent(aName, false, false);
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event->SetTrusted(true);
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bool dummy;
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return DispatchEvent(event, &dummy);
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}
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nsresult
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nsDOMDataChannel::OnChannelConnected(nsISupports* aContext)
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{
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LOG(("%p(%p): %s - Dispatching\n",this,(void*)mDataChannel,__FUNCTION__));
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return OnSimpleEvent(aContext, NS_LITERAL_STRING("open"));
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}
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nsresult
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nsDOMDataChannel::OnChannelClosed(nsISupports* aContext)
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{
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nsresult rv;
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// so we don't have to worry if we're notified from different paths in
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// the underlying code
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if (!mSentClose) {
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// Ok, we're done with it.
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mDataChannel->ReleaseConnection();
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LOG(("%p(%p): %s - Dispatching\n",this,(void*)mDataChannel,__FUNCTION__));
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rv = OnSimpleEvent(aContext, NS_LITERAL_STRING("close"));
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// no more events can happen
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mSentClose = true;
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} else {
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rv = NS_OK;
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}
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DontKeepAliveAnyMore();
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return rv;
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}
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nsresult
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nsDOMDataChannel::OnBufferLow(nsISupports* aContext)
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{
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LOG(("%p(%p): %s - Dispatching\n",this,(void*)mDataChannel,__FUNCTION__));
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return OnSimpleEvent(aContext, NS_LITERAL_STRING("bufferedamountlow"));
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}
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nsresult
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nsDOMDataChannel::NotBuffered(nsISupports* aContext)
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{
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// In the rare case that we held off GC to let the buffer drain
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UpdateMustKeepAlive();
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return NS_OK;
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}
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void
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nsDOMDataChannel::AppReady()
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{
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if (!mSentClose) { // may not be possible, simpler to just test anyways
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mDataChannel->AppReady();
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}
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}
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//-----------------------------------------------------------------------------
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// Methods that keep alive the DataChannel object when:
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// 1. the object has registered event listeners that can be triggered
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// ("strong event listeners");
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// 2. there are outgoing not sent messages.
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//-----------------------------------------------------------------------------
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void
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nsDOMDataChannel::UpdateMustKeepAlive()
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{
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MOZ_ASSERT(NS_IsMainThread());
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|
if (!mCheckMustKeepAlive) {
|
|
return;
|
|
}
|
|
|
|
bool shouldKeepAlive = false;
|
|
uint16_t readyState = mDataChannel->GetReadyState();
|
|
|
|
switch (readyState)
|
|
{
|
|
case DataChannel::CONNECTING:
|
|
case DataChannel::WAITING_TO_OPEN:
|
|
{
|
|
if (mListenerManager &&
|
|
(mListenerManager->HasListenersFor(nsGkAtoms::onopen) ||
|
|
mListenerManager->HasListenersFor(nsGkAtoms::onmessage) ||
|
|
mListenerManager->HasListenersFor(nsGkAtoms::onerror) ||
|
|
mListenerManager->HasListenersFor(nsGkAtoms::onbufferedamountlow) ||
|
|
mListenerManager->HasListenersFor(nsGkAtoms::onclose))) {
|
|
shouldKeepAlive = true;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case DataChannel::OPEN:
|
|
case DataChannel::CLOSING:
|
|
{
|
|
if (mDataChannel->GetBufferedAmount() != 0 ||
|
|
(mListenerManager &&
|
|
(mListenerManager->HasListenersFor(nsGkAtoms::onmessage) ||
|
|
mListenerManager->HasListenersFor(nsGkAtoms::onerror) ||
|
|
mListenerManager->HasListenersFor(nsGkAtoms::onbufferedamountlow) ||
|
|
mListenerManager->HasListenersFor(nsGkAtoms::onclose)))) {
|
|
shouldKeepAlive = true;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case DataChannel::CLOSED:
|
|
{
|
|
shouldKeepAlive = false;
|
|
}
|
|
}
|
|
|
|
if (mSelfRef && !shouldKeepAlive) {
|
|
ReleaseSelf();
|
|
} else if (!mSelfRef && shouldKeepAlive) {
|
|
mSelfRef = this;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsDOMDataChannel::DontKeepAliveAnyMore()
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
if (mSelfRef) {
|
|
// Since we're on MainThread, force an eventloop trip to avoid deleting
|
|
// ourselves.
|
|
ReleaseSelf();
|
|
}
|
|
|
|
mCheckMustKeepAlive = false;
|
|
}
|
|
|
|
void
|
|
nsDOMDataChannel::ReleaseSelf()
|
|
{
|
|
// release our self-reference (safely) by putting it in an event (always)
|
|
NS_ReleaseOnMainThreadSystemGroup("nsDOMDataChannel::mSelfRef",
|
|
mSelfRef.forget(), true);
|
|
}
|
|
|
|
void
|
|
nsDOMDataChannel::EventListenerAdded(nsAtom* aType)
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
UpdateMustKeepAlive();
|
|
}
|
|
|
|
void
|
|
nsDOMDataChannel::EventListenerRemoved(nsAtom* aType)
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
UpdateMustKeepAlive();
|
|
}
|
|
|
|
|
|
/* static */
|
|
nsresult
|
|
NS_NewDOMDataChannel(already_AddRefed<mozilla::DataChannel>&& aDataChannel,
|
|
nsPIDOMWindowInner* aWindow,
|
|
nsIDOMDataChannel** aDomDataChannel)
|
|
{
|
|
RefPtr<nsDOMDataChannel> domdc =
|
|
new nsDOMDataChannel(aDataChannel, aWindow);
|
|
|
|
nsresult rv = domdc->Init(aWindow);
|
|
NS_ENSURE_SUCCESS(rv,rv);
|
|
|
|
return CallQueryInterface(domdc, aDomDataChannel);
|
|
}
|
|
|
|
/* static */
|
|
void
|
|
NS_DataChannelAppReady(nsIDOMDataChannel* aDomDataChannel)
|
|
{
|
|
((nsDOMDataChannel *)aDomDataChannel)->AppReady();
|
|
}
|