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gecko-dev/dom/serviceworkers/ServiceWorkerEvents.cpp

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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 "ServiceWorkerEvents.h"
#include <utility>
#include "ServiceWorker.h"
#include "ServiceWorkerManager.h"
#include "js/Conversions.h"
#include "js/TypeDecls.h"
#include "mozilla/Encoding.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/LoadInfo.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/BodyUtil.h"
#include "mozilla/dom/Client.h"
#include "mozilla/dom/EventBinding.h"
#include "mozilla/dom/FetchEventBinding.h"
#include "mozilla/dom/MessagePort.h"
#include "mozilla/dom/PromiseNativeHandler.h"
#include "mozilla/dom/PushEventBinding.h"
#include "mozilla/dom/PushMessageDataBinding.h"
#include "mozilla/dom/PushUtil.h"
#include "mozilla/dom/Request.h"
#include "mozilla/dom/Response.h"
#include "mozilla/dom/ServiceWorkerOp.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerScope.h"
#include "mozilla/net/NeckoChannelParams.h"
#include "nsAutoPtr.h"
#include "nsComponentManagerUtils.h"
#include "nsContentPolicyUtils.h"
#include "nsContentUtils.h"
#include "nsIConsoleReportCollector.h"
#include "nsINetworkInterceptController.h"
#include "nsIScriptError.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsQueryObject.h"
#include "nsSerializationHelper.h"
#include "nsServiceManagerUtils.h"
#include "nsStreamUtils.h"
#include "xpcpublic.h"
using namespace mozilla;
using namespace mozilla::dom;
namespace {
void AsyncLog(nsIInterceptedChannel* aInterceptedChannel,
const nsACString& aRespondWithScriptSpec,
uint32_t aRespondWithLineNumber,
uint32_t aRespondWithColumnNumber, const nsACString& aMessageName,
const nsTArray<nsString>& aParams) {
MOZ_ASSERT(aInterceptedChannel);
nsCOMPtr<nsIConsoleReportCollector> reporter =
aInterceptedChannel->GetConsoleReportCollector();
if (reporter) {
reporter->AddConsoleReport(
nsIScriptError::errorFlag,
NS_LITERAL_CSTRING("Service Worker Interception"),
nsContentUtils::eDOM_PROPERTIES, aRespondWithScriptSpec,
aRespondWithLineNumber, aRespondWithColumnNumber, aMessageName,
aParams);
}
}
template <typename... Params>
void AsyncLog(nsIInterceptedChannel* aInterceptedChannel,
const nsACString& aRespondWithScriptSpec,
uint32_t aRespondWithLineNumber,
uint32_t aRespondWithColumnNumber,
// We have to list one explicit string so that calls with an
// nsTArray of params won't end up in here.
const nsACString& aMessageName, const nsAString& aFirstParam,
Params&&... aParams) {
nsTArray<nsString> paramsList(sizeof...(Params) + 1);
StringArrayAppender::Append(paramsList, sizeof...(Params) + 1, aFirstParam,
std::forward<Params>(aParams)...);
AsyncLog(aInterceptedChannel, aRespondWithScriptSpec, aRespondWithLineNumber,
aRespondWithColumnNumber, aMessageName, paramsList);
}
} // anonymous namespace
namespace mozilla {
namespace dom {
CancelChannelRunnable::CancelChannelRunnable(
nsMainThreadPtrHandle<nsIInterceptedChannel>& aChannel,
nsMainThreadPtrHandle<ServiceWorkerRegistrationInfo>& aRegistration,
nsresult aStatus)
: Runnable("dom::CancelChannelRunnable"),
mChannel(aChannel),
mRegistration(aRegistration),
mStatus(aStatus) {}
NS_IMETHODIMP
CancelChannelRunnable::Run() {
MOZ_ASSERT(NS_IsMainThread());
// TODO: When bug 1204254 is implemented, this time marker should be moved to
// the point where the body of the network request is complete.
mChannel->SetHandleFetchEventEnd(TimeStamp::Now());
mChannel->SaveTimeStamps();
mChannel->CancelInterception(mStatus);
mRegistration->MaybeScheduleUpdate();
return NS_OK;
}
FetchEvent::FetchEvent(EventTarget* aOwner)
: ExtendableEvent(aOwner),
mPreventDefaultLineNumber(0),
mPreventDefaultColumnNumber(0),
mWaitToRespond(false) {}
FetchEvent::~FetchEvent() = default;
void FetchEvent::PostInit(
nsMainThreadPtrHandle<nsIInterceptedChannel>& aChannel,
nsMainThreadPtrHandle<ServiceWorkerRegistrationInfo>& aRegistration,
const nsACString& aScriptSpec) {
mChannel = aChannel;
mRegistration = aRegistration;
mScriptSpec.Assign(aScriptSpec);
}
void FetchEvent::PostInit(const nsACString& aScriptSpec,
RefPtr<FetchEventOp> aRespondWithHandler) {
MOZ_ASSERT(aRespondWithHandler);
mScriptSpec.Assign(aScriptSpec);
mRespondWithHandler = std::move(aRespondWithHandler);
}
/*static*/
already_AddRefed<FetchEvent> FetchEvent::Constructor(
const GlobalObject& aGlobal, const nsAString& aType,
const FetchEventInit& aOptions) {
RefPtr<EventTarget> owner = do_QueryObject(aGlobal.GetAsSupports());
MOZ_ASSERT(owner);
RefPtr<FetchEvent> e = new FetchEvent(owner);
bool trusted = e->Init(owner);
e->InitEvent(aType, aOptions.mBubbles, aOptions.mCancelable);
e->SetTrusted(trusted);
e->SetComposed(aOptions.mComposed);
e->mRequest = aOptions.mRequest;
e->mClientId = aOptions.mClientId;
e->mResultingClientId = aOptions.mResultingClientId;
return e.forget();
}
namespace {
struct RespondWithClosure {
nsMainThreadPtrHandle<nsIInterceptedChannel> mInterceptedChannel;
nsMainThreadPtrHandle<ServiceWorkerRegistrationInfo> mRegistration;
const nsString mRequestURL;
const nsCString mRespondWithScriptSpec;
const uint32_t mRespondWithLineNumber;
const uint32_t mRespondWithColumnNumber;
RespondWithClosure(
nsMainThreadPtrHandle<nsIInterceptedChannel>& aChannel,
nsMainThreadPtrHandle<ServiceWorkerRegistrationInfo>& aRegistration,
const nsAString& aRequestURL, const nsACString& aRespondWithScriptSpec,
uint32_t aRespondWithLineNumber, uint32_t aRespondWithColumnNumber)
: mInterceptedChannel(aChannel),
mRegistration(aRegistration),
mRequestURL(aRequestURL),
mRespondWithScriptSpec(aRespondWithScriptSpec),
mRespondWithLineNumber(aRespondWithLineNumber),
mRespondWithColumnNumber(aRespondWithColumnNumber) {}
};
class FinishResponse final : public Runnable {
nsMainThreadPtrHandle<nsIInterceptedChannel> mChannel;
public:
explicit FinishResponse(
nsMainThreadPtrHandle<nsIInterceptedChannel>& aChannel)
: Runnable("dom::FinishResponse"), mChannel(aChannel) {}
NS_IMETHOD
Run() override {
MOZ_ASSERT(NS_IsMainThread());
nsresult rv = mChannel->FinishSynthesizedResponse();
if (NS_WARN_IF(NS_FAILED(rv))) {
mChannel->CancelInterception(NS_ERROR_INTERCEPTION_FAILED);
return NS_OK;
}
TimeStamp timeStamp = TimeStamp::Now();
mChannel->SetHandleFetchEventEnd(timeStamp);
mChannel->SetFinishSynthesizedResponseEnd(timeStamp);
mChannel->SaveTimeStamps();
return rv;
}
};
class BodyCopyHandle final : public nsIInterceptedBodyCallback {
UniquePtr<RespondWithClosure> mClosure;
~BodyCopyHandle() = default;
public:
NS_DECL_THREADSAFE_ISUPPORTS
explicit BodyCopyHandle(UniquePtr<RespondWithClosure>&& aClosure)
: mClosure(std::move(aClosure)) {}
NS_IMETHOD
BodyComplete(nsresult aRv) override {
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsIRunnable> event;
if (NS_WARN_IF(NS_FAILED(aRv))) {
AsyncLog(mClosure->mInterceptedChannel, mClosure->mRespondWithScriptSpec,
mClosure->mRespondWithLineNumber,
mClosure->mRespondWithColumnNumber,
NS_LITERAL_CSTRING("InterceptionFailedWithURL"),
mClosure->mRequestURL);
event = new CancelChannelRunnable(mClosure->mInterceptedChannel,
mClosure->mRegistration,
NS_ERROR_INTERCEPTION_FAILED);
} else {
event = new FinishResponse(mClosure->mInterceptedChannel);
}
mClosure.reset();
event->Run();
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(BodyCopyHandle, nsIInterceptedBodyCallback)
class StartResponse final : public Runnable {
nsMainThreadPtrHandle<nsIInterceptedChannel> mChannel;
RefPtr<InternalResponse> mInternalResponse;
ChannelInfo mWorkerChannelInfo;
const nsCString mScriptSpec;
const nsCString mResponseURLSpec;
UniquePtr<RespondWithClosure> mClosure;
public:
StartResponse(nsMainThreadPtrHandle<nsIInterceptedChannel>& aChannel,
InternalResponse* aInternalResponse,
const ChannelInfo& aWorkerChannelInfo,
const nsACString& aScriptSpec,
const nsACString& aResponseURLSpec,
UniquePtr<RespondWithClosure>&& aClosure)
: Runnable("dom::StartResponse"),
mChannel(aChannel),
mInternalResponse(aInternalResponse),
mWorkerChannelInfo(aWorkerChannelInfo),
mScriptSpec(aScriptSpec),
mResponseURLSpec(aResponseURLSpec),
mClosure(std::move(aClosure)) {}
NS_IMETHOD
Run() override {
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsIChannel> underlyingChannel;
nsresult rv = mChannel->GetChannel(getter_AddRefs(underlyingChannel));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(underlyingChannel, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsILoadInfo> loadInfo = underlyingChannel->LoadInfo();
if (!CSPPermitsResponse(loadInfo)) {
mChannel->CancelInterception(NS_ERROR_CONTENT_BLOCKED);
return NS_OK;
}
ChannelInfo channelInfo;
if (mInternalResponse->GetChannelInfo().IsInitialized()) {
channelInfo = mInternalResponse->GetChannelInfo();
} else {
// We are dealing with a synthesized response here, so fall back to the
// channel info for the worker script.
channelInfo = mWorkerChannelInfo;
}
rv = mChannel->SetChannelInfo(&channelInfo);
if (NS_WARN_IF(NS_FAILED(rv))) {
mChannel->CancelInterception(NS_ERROR_INTERCEPTION_FAILED);
return NS_OK;
}
rv = mChannel->SynthesizeStatus(
mInternalResponse->GetUnfilteredStatus(),
mInternalResponse->GetUnfilteredStatusText());
if (NS_WARN_IF(NS_FAILED(rv))) {
mChannel->CancelInterception(NS_ERROR_INTERCEPTION_FAILED);
return NS_OK;
}
AutoTArray<InternalHeaders::Entry, 5> entries;
mInternalResponse->UnfilteredHeaders()->GetEntries(entries);
for (uint32_t i = 0; i < entries.Length(); ++i) {
mChannel->SynthesizeHeader(entries[i].mName, entries[i].mValue);
}
auto castLoadInfo = static_cast<mozilla::net::LoadInfo*>(loadInfo.get());
castLoadInfo->SynthesizeServiceWorkerTainting(
mInternalResponse->GetTainting());
// Get the preferred alternative data type of outter channel
nsAutoCString preferredAltDataType(EmptyCString());
nsCOMPtr<nsICacheInfoChannel> outerChannel =
do_QueryInterface(underlyingChannel);
if (outerChannel &&
!outerChannel->PreferredAlternativeDataTypes().IsEmpty()) {
// TODO: handle multiple types properly.
preferredAltDataType.Assign(
outerChannel->PreferredAlternativeDataTypes()[0].type());
}
// Get the alternative data type saved in the InternalResponse
nsAutoCString altDataType;
nsCOMPtr<nsICacheInfoChannel> cacheInfoChannel =
mInternalResponse->TakeCacheInfoChannel().get();
if (cacheInfoChannel) {
cacheInfoChannel->GetAlternativeDataType(altDataType);
}
nsCOMPtr<nsIInputStream> body;
if (preferredAltDataType.Equals(altDataType)) {
body = mInternalResponse->TakeAlternativeBody();
}
if (!body) {
mInternalResponse->GetUnfilteredBody(getter_AddRefs(body));
} else {
Telemetry::ScalarAdd(Telemetry::ScalarID::SW_ALTERNATIVE_BODY_USED_COUNT,
1);
}
RefPtr<BodyCopyHandle> copyHandle;
copyHandle = new BodyCopyHandle(std::move(mClosure));
rv = mChannel->StartSynthesizedResponse(body, copyHandle, cacheInfoChannel,
mResponseURLSpec,
mInternalResponse->IsRedirected());
if (NS_WARN_IF(NS_FAILED(rv))) {
mChannel->CancelInterception(NS_ERROR_INTERCEPTION_FAILED);
return NS_OK;
}
nsCOMPtr<nsIObserverService> obsService = services::GetObserverService();
if (obsService) {
obsService->NotifyObservers(
underlyingChannel, "service-worker-synthesized-response", nullptr);
}
return rv;
}
bool CSPPermitsResponse(nsILoadInfo* aLoadInfo) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aLoadInfo);
nsresult rv;
nsCOMPtr<nsIURI> uri;
nsCString url = mInternalResponse->GetUnfilteredURL();
if (url.IsEmpty()) {
// Synthetic response. The buck stops at the worker script.
url = mScriptSpec;
}
rv = NS_NewURI(getter_AddRefs(uri), url);
NS_ENSURE_SUCCESS(rv, false);
int16_t decision = nsIContentPolicy::ACCEPT;
rv = NS_CheckContentLoadPolicy(uri, aLoadInfo, EmptyCString(), &decision);
NS_ENSURE_SUCCESS(rv, false);
return decision == nsIContentPolicy::ACCEPT;
}
};
class RespondWithHandler final : public PromiseNativeHandler {
nsMainThreadPtrHandle<nsIInterceptedChannel> mInterceptedChannel;
nsMainThreadPtrHandle<ServiceWorkerRegistrationInfo> mRegistration;
const RequestMode mRequestMode;
const RequestRedirect mRequestRedirectMode;
#ifdef DEBUG
const bool mIsClientRequest;
#endif
const nsCString mScriptSpec;
const nsString mRequestURL;
const nsCString mRequestFragment;
const nsCString mRespondWithScriptSpec;
const uint32_t mRespondWithLineNumber;
const uint32_t mRespondWithColumnNumber;
bool mRequestWasHandled;
public:
NS_DECL_ISUPPORTS
RespondWithHandler(
nsMainThreadPtrHandle<nsIInterceptedChannel>& aChannel,
nsMainThreadPtrHandle<ServiceWorkerRegistrationInfo>& aRegistration,
RequestMode aRequestMode, bool aIsClientRequest,
RequestRedirect aRedirectMode, const nsACString& aScriptSpec,
const nsAString& aRequestURL, const nsACString& aRequestFragment,
const nsACString& aRespondWithScriptSpec, uint32_t aRespondWithLineNumber,
uint32_t aRespondWithColumnNumber)
: mInterceptedChannel(aChannel),
mRegistration(aRegistration),
mRequestMode(aRequestMode),
mRequestRedirectMode(aRedirectMode)
#ifdef DEBUG
,
mIsClientRequest(aIsClientRequest)
#endif
,
mScriptSpec(aScriptSpec),
mRequestURL(aRequestURL),
mRequestFragment(aRequestFragment),
mRespondWithScriptSpec(aRespondWithScriptSpec),
mRespondWithLineNumber(aRespondWithLineNumber),
mRespondWithColumnNumber(aRespondWithColumnNumber),
mRequestWasHandled(false) {
}
void ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
void RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
void CancelRequest(nsresult aStatus);
void AsyncLog(const nsACString& aMessageName,
const nsTArray<nsString>& aParams) {
::AsyncLog(mInterceptedChannel, mRespondWithScriptSpec,
mRespondWithLineNumber, mRespondWithColumnNumber, aMessageName,
aParams);
}
void AsyncLog(const nsACString& aSourceSpec, uint32_t aLine, uint32_t aColumn,
const nsACString& aMessageName,
const nsTArray<nsString>& aParams) {
::AsyncLog(mInterceptedChannel, aSourceSpec, aLine, aColumn, aMessageName,
aParams);
}
private:
~RespondWithHandler() {
if (!mRequestWasHandled) {
::AsyncLog(mInterceptedChannel, mRespondWithScriptSpec,
mRespondWithLineNumber, mRespondWithColumnNumber,
NS_LITERAL_CSTRING("InterceptionFailedWithURL"), mRequestURL);
CancelRequest(NS_ERROR_INTERCEPTION_FAILED);
}
}
};
class MOZ_STACK_CLASS AutoCancel {
RefPtr<RespondWithHandler> mOwner;
nsCString mSourceSpec;
uint32_t mLine;
uint32_t mColumn;
nsCString mMessageName;
nsTArray<nsString> mParams;
public:
AutoCancel(RespondWithHandler* aOwner, const nsString& aRequestURL)
: mOwner(aOwner),
mLine(0),
mColumn(0),
mMessageName(NS_LITERAL_CSTRING("InterceptionFailedWithURL")) {
mParams.AppendElement(aRequestURL);
}
~AutoCancel() {
if (mOwner) {
if (mSourceSpec.IsEmpty()) {
mOwner->AsyncLog(mMessageName, mParams);
} else {
mOwner->AsyncLog(mSourceSpec, mLine, mColumn, mMessageName, mParams);
}
mOwner->CancelRequest(NS_ERROR_INTERCEPTION_FAILED);
}
}
// This function steals the error message from a ErrorResult.
void SetCancelErrorResult(JSContext* aCx, ErrorResult& aRv) {
MOZ_DIAGNOSTIC_ASSERT(aRv.Failed());
MOZ_DIAGNOSTIC_ASSERT(!JS_IsExceptionPending(aCx));
// Storing the error as exception in the JSContext.
if (!aRv.MaybeSetPendingException(aCx)) {
return;
}
MOZ_ASSERT(!aRv.Failed());
// Let's take the pending exception.
JS::Rooted<JS::Value> exn(aCx);
if (!JS_GetPendingException(aCx, &exn)) {
return;
}
JS_ClearPendingException(aCx);
// Converting the exception in a js::ErrorReport.
js::ErrorReport report(aCx);
if (!report.init(aCx, exn, js::ErrorReport::WithSideEffects)) {
JS_ClearPendingException(aCx);
return;
}
MOZ_ASSERT(mOwner);
MOZ_ASSERT(mMessageName.EqualsLiteral("InterceptionFailedWithURL"));
MOZ_ASSERT(mParams.Length() == 1);
// Let's store the error message here.
mMessageName.Assign(report.toStringResult().c_str());
mParams.Clear();
}
template <typename... Params>
void SetCancelMessage(const nsACString& aMessageName, Params&&... aParams) {
MOZ_ASSERT(mOwner);
MOZ_ASSERT(mMessageName.EqualsLiteral("InterceptionFailedWithURL"));
MOZ_ASSERT(mParams.Length() == 1);
mMessageName = aMessageName;
mParams.Clear();
StringArrayAppender::Append(mParams, sizeof...(Params),
std::forward<Params>(aParams)...);
}
template <typename... Params>
void SetCancelMessageAndLocation(const nsACString& aSourceSpec,
uint32_t aLine, uint32_t aColumn,
const nsACString& aMessageName,
Params&&... aParams) {
MOZ_ASSERT(mOwner);
MOZ_ASSERT(mMessageName.EqualsLiteral("InterceptionFailedWithURL"));
MOZ_ASSERT(mParams.Length() == 1);
mSourceSpec = aSourceSpec;
mLine = aLine;
mColumn = aColumn;
mMessageName = aMessageName;
mParams.Clear();
StringArrayAppender::Append(mParams, sizeof...(Params),
std::forward<Params>(aParams)...);
}
void Reset() { mOwner = nullptr; }
};
NS_IMPL_ISUPPORTS0(RespondWithHandler)
void RespondWithHandler::ResolvedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue) {
AutoCancel autoCancel(this, mRequestURL);
mInterceptedChannel->SetFinishResponseStart(TimeStamp::Now());
if (!aValue.isObject()) {
NS_WARNING(
"FetchEvent::RespondWith was passed a promise resolved to a non-Object "
"value");
nsCString sourceSpec;
uint32_t line = 0;
uint32_t column = 0;
nsString valueString;
nsContentUtils::ExtractErrorValues(aCx, aValue, sourceSpec, &line, &column,
valueString);
autoCancel.SetCancelMessageAndLocation(
sourceSpec, line, column,
NS_LITERAL_CSTRING("InterceptedNonResponseWithURL"), mRequestURL,
valueString);
return;
}
RefPtr<Response> response;
nsresult rv = UNWRAP_OBJECT(Response, &aValue.toObject(), response);
if (NS_FAILED(rv)) {
nsCString sourceSpec;
uint32_t line = 0;
uint32_t column = 0;
nsString valueString;
nsContentUtils::ExtractErrorValues(aCx, aValue, sourceSpec, &line, &column,
valueString);
autoCancel.SetCancelMessageAndLocation(
sourceSpec, line, column,
NS_LITERAL_CSTRING("InterceptedNonResponseWithURL"), mRequestURL,
valueString);
return;
}
WorkerPrivate* worker = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(worker);
worker->AssertIsOnWorkerThread();
// Section "HTTP Fetch", step 3.3:
// If one of the following conditions is true, return a network error:
// * response's type is "error".
// * request's mode is not "no-cors" and response's type is "opaque".
// * request's redirect mode is not "manual" and response's type is
// "opaqueredirect".
// * request's redirect mode is not "follow" and response's url list
// has more than one item.
if (response->Type() == ResponseType::Error) {
autoCancel.SetCancelMessage(
NS_LITERAL_CSTRING("InterceptedErrorResponseWithURL"), mRequestURL);
return;
}
MOZ_ASSERT_IF(mIsClientRequest, mRequestMode == RequestMode::Same_origin ||
mRequestMode == RequestMode::Navigate);
if (response->Type() == ResponseType::Opaque &&
mRequestMode != RequestMode::No_cors) {
NS_ConvertASCIItoUTF16 modeString(
RequestModeValues::GetString(mRequestMode));
autoCancel.SetCancelMessage(
NS_LITERAL_CSTRING("BadOpaqueInterceptionRequestModeWithURL"),
mRequestURL, modeString);
return;
}
if (mRequestRedirectMode != RequestRedirect::Manual &&
response->Type() == ResponseType::Opaqueredirect) {
autoCancel.SetCancelMessage(
NS_LITERAL_CSTRING("BadOpaqueRedirectInterceptionWithURL"),
mRequestURL);
return;
}
if (mRequestRedirectMode != RequestRedirect::Follow &&
response->Redirected()) {
autoCancel.SetCancelMessage(
NS_LITERAL_CSTRING("BadRedirectModeInterceptionWithURL"), mRequestURL);
return;
}
{
ErrorResult error;
bool bodyUsed = response->GetBodyUsed(error);
error.WouldReportJSException();
if (NS_WARN_IF(error.Failed())) {
autoCancel.SetCancelErrorResult(aCx, error);
return;
}
if (NS_WARN_IF(bodyUsed)) {
autoCancel.SetCancelMessage(
NS_LITERAL_CSTRING("InterceptedUsedResponseWithURL"), mRequestURL);
return;
}
}
RefPtr<InternalResponse> ir = response->GetInternalResponse();
if (NS_WARN_IF(!ir)) {
return;
}
// An extra safety check to make sure our invariant that opaque and cors
// responses always have a URL does not break.
if (NS_WARN_IF((response->Type() == ResponseType::Opaque ||
response->Type() == ResponseType::Cors) &&
ir->GetUnfilteredURL().IsEmpty())) {
MOZ_DIAGNOSTIC_ASSERT(false, "Cors or opaque Response without a URL");
return;
}
Telemetry::ScalarAdd(Telemetry::ScalarID::SW_SYNTHESIZED_RES_COUNT, 1);
if (mRequestMode == RequestMode::Same_origin &&
response->Type() == ResponseType::Cors) {
Telemetry::ScalarAdd(Telemetry::ScalarID::SW_CORS_RES_FOR_SO_REQ_COUNT, 1);
// XXXtt: Will have a pref to enable the quirk response in bug 1419684.
// The variadic template provided by StringArrayAppender requires exactly
// an nsString.
NS_ConvertUTF8toUTF16 responseURL(ir->GetUnfilteredURL());
autoCancel.SetCancelMessage(
NS_LITERAL_CSTRING("CorsResponseForSameOriginRequest"), mRequestURL,
responseURL);
return;
}
// Propagate the URL to the content if the request mode is not "navigate".
// Note that, we only reflect the final URL if the response.redirected is
// false. We propagate all the URLs if the response.redirected is true.
nsCString responseURL;
if (mRequestMode != RequestMode::Navigate) {
responseURL = ir->GetUnfilteredURL();
// Similar to how we apply the request fragment to redirects automatically
// we also want to apply it automatically when propagating the response
// URL from a service worker interception. Currently response.url strips
// the fragment, so this will never conflict with an existing fragment
// on the response. In the future we will have to check for a response
// fragment and avoid overriding in that case.
if (!mRequestFragment.IsEmpty() && !responseURL.IsEmpty()) {
MOZ_ASSERT(!responseURL.Contains('#'));
responseURL.Append(NS_LITERAL_CSTRING("#"));
responseURL.Append(mRequestFragment);
}
}
UniquePtr<RespondWithClosure> closure(new RespondWithClosure(
mInterceptedChannel, mRegistration, mRequestURL, mRespondWithScriptSpec,
mRespondWithLineNumber, mRespondWithColumnNumber));
nsCOMPtr<nsIRunnable> startRunnable =
new StartResponse(mInterceptedChannel, ir, worker->GetChannelInfo(),
mScriptSpec, responseURL, std::move(closure));
nsCOMPtr<nsIInputStream> body;
ir->GetUnfilteredBody(getter_AddRefs(body));
// Errors and redirects may not have a body.
if (body) {
ErrorResult error;
response->SetBodyUsed(aCx, error);
error.WouldReportJSException();
if (NS_WARN_IF(error.Failed())) {
autoCancel.SetCancelErrorResult(aCx, error);
return;
}
}
MOZ_ALWAYS_SUCCEEDS(worker->DispatchToMainThread(startRunnable.forget()));
MOZ_ASSERT(!closure);
autoCancel.Reset();
mRequestWasHandled = true;
}
void RespondWithHandler::RejectedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue) {
nsCString sourceSpec = mRespondWithScriptSpec;
uint32_t line = mRespondWithLineNumber;
uint32_t column = mRespondWithColumnNumber;
nsString valueString;
mInterceptedChannel->SetFinishResponseStart(TimeStamp::Now());
nsContentUtils::ExtractErrorValues(aCx, aValue, sourceSpec, &line, &column,
valueString);
::AsyncLog(mInterceptedChannel, sourceSpec, line, column,
NS_LITERAL_CSTRING("InterceptionRejectedResponseWithURL"),
mRequestURL, valueString);
CancelRequest(NS_ERROR_INTERCEPTION_FAILED);
}
void RespondWithHandler::CancelRequest(nsresult aStatus) {
nsCOMPtr<nsIRunnable> runnable =
new CancelChannelRunnable(mInterceptedChannel, mRegistration, aStatus);
// Note, this may run off the worker thread during worker termination.
WorkerPrivate* worker = GetCurrentThreadWorkerPrivate();
if (worker) {
MOZ_ALWAYS_SUCCEEDS(worker->DispatchToMainThread(runnable.forget()));
} else {
MOZ_ALWAYS_SUCCEEDS(NS_DispatchToMainThread(runnable.forget()));
}
mRequestWasHandled = true;
}
} // namespace
void FetchEvent::RespondWith(JSContext* aCx, Promise& aArg, ErrorResult& aRv) {
if (!GetDispatchFlag() || mWaitToRespond) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// Record where respondWith() was called in the script so we can include the
// information in any error reporting. We should be guaranteed not to get
// a file:// string here because service workers require http/https.
nsCString spec;
uint32_t line = 0;
uint32_t column = 0;
nsJSUtils::GetCallingLocation(aCx, spec, &line, &column);
RefPtr<InternalRequest> ir = mRequest->GetInternalRequest();
nsAutoCString requestURL;
ir->GetURL(requestURL);
StopImmediatePropagation();
mWaitToRespond = true;
if (mChannel) {
RefPtr<RespondWithHandler> handler = new RespondWithHandler(
mChannel, mRegistration, mRequest->Mode(), ir->IsClientRequest(),
mRequest->Redirect(), mScriptSpec, NS_ConvertUTF8toUTF16(requestURL),
ir->GetFragment(), spec, line, column);
aArg.AppendNativeHandler(handler);
} else {
MOZ_ASSERT(mRespondWithHandler);
mRespondWithHandler->RespondWithCalledAt(spec, line, column);
aArg.AppendNativeHandler(mRespondWithHandler);
mRespondWithHandler = nullptr;
}
if (!WaitOnPromise(aArg)) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
}
}
void FetchEvent::PreventDefault(JSContext* aCx, CallerType aCallerType) {
MOZ_ASSERT(aCx);
MOZ_ASSERT(aCallerType != CallerType::System,
"Since when do we support system-principal service workers?");
if (mPreventDefaultScriptSpec.IsEmpty()) {
// Note when the FetchEvent might have been canceled by script, but don't
// actually log the location until we are sure it matters. This is
// determined in ServiceWorkerPrivate.cpp. We only remember the first
// call to preventDefault() as its the most likely to have actually canceled
// the event.
nsJSUtils::GetCallingLocation(aCx, mPreventDefaultScriptSpec,
&mPreventDefaultLineNumber,
&mPreventDefaultColumnNumber);
}
Event::PreventDefault(aCx, aCallerType);
}
void FetchEvent::ReportCanceled() {
MOZ_ASSERT(!mPreventDefaultScriptSpec.IsEmpty());
RefPtr<InternalRequest> ir = mRequest->GetInternalRequest();
nsAutoCString url;
ir->GetURL(url);
// The variadic template provided by StringArrayAppender requires exactly
// an nsString.
NS_ConvertUTF8toUTF16 requestURL(url);
// nsString requestURL;
// CopyUTF8toUTF16(url, requestURL);
if (mChannel) {
::AsyncLog(mChannel.get(), mPreventDefaultScriptSpec,
mPreventDefaultLineNumber, mPreventDefaultColumnNumber,
NS_LITERAL_CSTRING("InterceptionCanceledWithURL"), requestURL);
} else {
mRespondWithHandler->ReportCanceled(mPreventDefaultScriptSpec,
mPreventDefaultLineNumber,
mPreventDefaultColumnNumber);
mRespondWithHandler = nullptr;
}
}
namespace {
class WaitUntilHandler final : public PromiseNativeHandler {
WorkerPrivate* mWorkerPrivate;
const nsCString mScope;
nsString mSourceSpec;
uint32_t mLine;
uint32_t mColumn;
nsString mRejectValue;
~WaitUntilHandler() = default;
public:
NS_DECL_THREADSAFE_ISUPPORTS
WaitUntilHandler(WorkerPrivate* aWorkerPrivate, JSContext* aCx)
: mWorkerPrivate(aWorkerPrivate),
mScope(mWorkerPrivate->ServiceWorkerScope()),
mLine(0),
mColumn(0) {
mWorkerPrivate->AssertIsOnWorkerThread();
// Save the location of the waitUntil() call itself as a fallback
// in case the rejection value does not contain any location info.
nsJSUtils::GetCallingLocation(aCx, mSourceSpec, &mLine, &mColumn);
}
void ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override {
// do nothing, we are only here to report errors
}
void RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override {
mWorkerPrivate->AssertIsOnWorkerThread();
nsString spec;
uint32_t line = 0;
uint32_t column = 0;
nsContentUtils::ExtractErrorValues(aCx, aValue, spec, &line, &column,
mRejectValue);
// only use the extracted location if we found one
if (!spec.IsEmpty()) {
mSourceSpec = spec;
mLine = line;
mColumn = column;
}
MOZ_ALWAYS_SUCCEEDS(mWorkerPrivate->DispatchToMainThread(
NewRunnableMethod("WaitUntilHandler::ReportOnMainThread", this,
&WaitUntilHandler::ReportOnMainThread)));
}
void ReportOnMainThread() {
MOZ_ASSERT(NS_IsMainThread());
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (!swm) {
// browser shutdown
return;
}
// TODO: Make the error message a localized string. (bug 1222720)
nsString message;
message.AppendLiteral(
"Service worker event waitUntil() was passed a "
"promise that rejected with '");
message.Append(mRejectValue);
message.AppendLiteral("'.");
// Note, there is a corner case where this won't report to the window
// that triggered the error. Consider a navigation fetch event that
// rejects waitUntil() without holding respondWith() open. In this case
// there is no controlling document yet, the window did call .register()
// because there is no documeny yet, and the navigation is no longer
// being intercepted.
swm->ReportToAllClients(mScope, message, mSourceSpec, EmptyString(), mLine,
mColumn, nsIScriptError::errorFlag);
}
};
NS_IMPL_ISUPPORTS0(WaitUntilHandler)
} // anonymous namespace
ExtendableEvent::ExtensionsHandler::~ExtensionsHandler() {
MOZ_ASSERT(!mExtendableEvent);
}
bool ExtendableEvent::ExtensionsHandler::GetDispatchFlag() const {
// mExtendableEvent should set itself as nullptr in its destructor, and we
// can't be dispatching an event that doesn't exist, so this should work for
// as long as it's not needed to determine whether the event is still alive,
// which seems unlikely.
if (!mExtendableEvent) {
return false;
}
return mExtendableEvent->GetDispatchFlag();
}
void ExtendableEvent::ExtensionsHandler::SetExtendableEvent(
const ExtendableEvent* const aExtendableEvent) {
mExtendableEvent = aExtendableEvent;
}
NS_IMPL_ADDREF_INHERITED(FetchEvent, ExtendableEvent)
NS_IMPL_RELEASE_INHERITED(FetchEvent, ExtendableEvent)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FetchEvent)
NS_INTERFACE_MAP_END_INHERITING(ExtendableEvent)
NS_IMPL_CYCLE_COLLECTION_INHERITED(FetchEvent, ExtendableEvent, mRequest)
ExtendableEvent::ExtendableEvent(EventTarget* aOwner)
: Event(aOwner, nullptr, nullptr) {}
bool ExtendableEvent::WaitOnPromise(Promise& aPromise) {
if (!mExtensionsHandler) {
return false;
}
return mExtensionsHandler->WaitOnPromise(aPromise);
}
void ExtendableEvent::SetKeepAliveHandler(
ExtensionsHandler* aExtensionsHandler) {
MOZ_ASSERT(!mExtensionsHandler);
WorkerPrivate* worker = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(worker);
worker->AssertIsOnWorkerThread();
mExtensionsHandler = aExtensionsHandler;
mExtensionsHandler->SetExtendableEvent(this);
}
void ExtendableEvent::WaitUntil(JSContext* aCx, Promise& aPromise,
ErrorResult& aRv) {
MOZ_ASSERT(!NS_IsMainThread());
if (!WaitOnPromise(aPromise)) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// Append our handler to each waitUntil promise separately so we
// can record the location in script where waitUntil was called.
RefPtr<WaitUntilHandler> handler =
new WaitUntilHandler(GetCurrentThreadWorkerPrivate(), aCx);
aPromise.AppendNativeHandler(handler);
}
NS_IMPL_ADDREF_INHERITED(ExtendableEvent, Event)
NS_IMPL_RELEASE_INHERITED(ExtendableEvent, Event)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ExtendableEvent)
NS_INTERFACE_MAP_END_INHERITING(Event)
namespace {
nsresult ExtractBytesFromUSVString(const nsAString& aStr,
nsTArray<uint8_t>& aBytes) {
MOZ_ASSERT(aBytes.IsEmpty());
auto encoder = UTF_8_ENCODING->NewEncoder();
CheckedInt<size_t> needed =
encoder->MaxBufferLengthFromUTF16WithoutReplacement(aStr.Length());
if (NS_WARN_IF(!needed.isValid() ||
!aBytes.SetLength(needed.value(), fallible))) {
return NS_ERROR_OUT_OF_MEMORY;
}
uint32_t result;
size_t read;
size_t written;
Tie(result, read, written) =
encoder->EncodeFromUTF16WithoutReplacement(aStr, aBytes, true);
MOZ_ASSERT(result == kInputEmpty);
MOZ_ASSERT(read == aStr.Length());
aBytes.TruncateLength(written);
return NS_OK;
}
nsresult ExtractBytesFromData(
const OwningArrayBufferViewOrArrayBufferOrUSVString& aDataInit,
nsTArray<uint8_t>& aBytes) {
if (aDataInit.IsArrayBufferView()) {
const ArrayBufferView& view = aDataInit.GetAsArrayBufferView();
if (NS_WARN_IF(!PushUtil::CopyArrayBufferViewToArray(view, aBytes))) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
if (aDataInit.IsArrayBuffer()) {
const ArrayBuffer& buffer = aDataInit.GetAsArrayBuffer();
if (NS_WARN_IF(!PushUtil::CopyArrayBufferToArray(buffer, aBytes))) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
if (aDataInit.IsUSVString()) {
return ExtractBytesFromUSVString(aDataInit.GetAsUSVString(), aBytes);
}
MOZ_ASSERT_UNREACHABLE("Unexpected push message data");
return NS_ERROR_FAILURE;
}
} // namespace
PushMessageData::PushMessageData(nsIGlobalObject* aOwner,
nsTArray<uint8_t>&& aBytes)
: mOwner(aOwner), mBytes(std::move(aBytes)) {}
PushMessageData::~PushMessageData() = default;
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(PushMessageData, mOwner)
NS_IMPL_CYCLE_COLLECTING_ADDREF(PushMessageData)
NS_IMPL_CYCLE_COLLECTING_RELEASE(PushMessageData)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PushMessageData)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
JSObject* PushMessageData::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return mozilla::dom::PushMessageData_Binding::Wrap(aCx, this, aGivenProto);
}
void PushMessageData::Json(JSContext* cx, JS::MutableHandle<JS::Value> aRetval,
ErrorResult& aRv) {
if (NS_FAILED(EnsureDecodedText())) {
aRv.Throw(NS_ERROR_DOM_UNKNOWN_ERR);
return;
}
BodyUtil::ConsumeJson(cx, aRetval, mDecodedText, aRv);
}
void PushMessageData::Text(nsAString& aData) {
if (NS_SUCCEEDED(EnsureDecodedText())) {
aData = mDecodedText;
}
}
void PushMessageData::ArrayBuffer(JSContext* cx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv) {
uint8_t* data = GetContentsCopy();
if (data) {
BodyUtil::ConsumeArrayBuffer(cx, aRetval, mBytes.Length(), data, aRv);
}
}
already_AddRefed<mozilla::dom::Blob> PushMessageData::Blob(ErrorResult& aRv) {
uint8_t* data = GetContentsCopy();
if (data) {
RefPtr<mozilla::dom::Blob> blob = BodyUtil::ConsumeBlob(
mOwner, EmptyString(), mBytes.Length(), data, aRv);
if (blob) {
return blob.forget();
}
}
return nullptr;
}
nsresult PushMessageData::EnsureDecodedText() {
if (mBytes.IsEmpty() || !mDecodedText.IsEmpty()) {
return NS_OK;
}
nsresult rv = BodyUtil::ConsumeText(
mBytes.Length(), reinterpret_cast<uint8_t*>(mBytes.Elements()),
mDecodedText);
if (NS_WARN_IF(NS_FAILED(rv))) {
mDecodedText.Truncate();
return rv;
}
return NS_OK;
}
uint8_t* PushMessageData::GetContentsCopy() {
uint32_t length = mBytes.Length();
void* data = malloc(length);
if (!data) {
return nullptr;
}
memcpy(data, mBytes.Elements(), length);
return reinterpret_cast<uint8_t*>(data);
}
PushEvent::PushEvent(EventTarget* aOwner) : ExtendableEvent(aOwner) {}
already_AddRefed<PushEvent> PushEvent::Constructor(
mozilla::dom::EventTarget* aOwner, const nsAString& aType,
const PushEventInit& aOptions, ErrorResult& aRv) {
RefPtr<PushEvent> e = new PushEvent(aOwner);
bool trusted = e->Init(aOwner);
e->InitEvent(aType, aOptions.mBubbles, aOptions.mCancelable);
e->SetTrusted(trusted);
e->SetComposed(aOptions.mComposed);
if (aOptions.mData.WasPassed()) {
nsTArray<uint8_t> bytes;
nsresult rv = ExtractBytesFromData(aOptions.mData.Value(), bytes);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return nullptr;
}
e->mData = new PushMessageData(aOwner->GetOwnerGlobal(), std::move(bytes));
}
return e.forget();
}
NS_IMPL_ADDREF_INHERITED(PushEvent, ExtendableEvent)
NS_IMPL_RELEASE_INHERITED(PushEvent, ExtendableEvent)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PushEvent)
NS_INTERFACE_MAP_END_INHERITING(ExtendableEvent)
NS_IMPL_CYCLE_COLLECTION_INHERITED(PushEvent, ExtendableEvent, mData)
JSObject* PushEvent::WrapObjectInternal(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return mozilla::dom::PushEvent_Binding::Wrap(aCx, this, aGivenProto);
}
ExtendableMessageEvent::ExtendableMessageEvent(EventTarget* aOwner)
: ExtendableEvent(aOwner), mData(JS::UndefinedValue()) {
mozilla::HoldJSObjects(this);
}
ExtendableMessageEvent::~ExtendableMessageEvent() {
mData.setUndefined();
DropJSObjects(this);
}
void ExtendableMessageEvent::GetData(JSContext* aCx,
JS::MutableHandle<JS::Value> aData,
ErrorResult& aRv) {
aData.set(mData);
if (!JS_WrapValue(aCx, aData)) {
aRv.Throw(NS_ERROR_FAILURE);
}
}
void ExtendableMessageEvent::GetSource(
Nullable<OwningClientOrServiceWorkerOrMessagePort>& aValue) const {
if (mClient) {
aValue.SetValue().SetAsClient() = mClient;
} else if (mServiceWorker) {
aValue.SetValue().SetAsServiceWorker() = mServiceWorker;
} else if (mMessagePort) {
aValue.SetValue().SetAsMessagePort() = mMessagePort;
} else {
// nullptr source is possible for manually constructed event
aValue.SetNull();
}
}
/* static */
already_AddRefed<ExtendableMessageEvent> ExtendableMessageEvent::Constructor(
const GlobalObject& aGlobal, const nsAString& aType,
const ExtendableMessageEventInit& aOptions) {
nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
return Constructor(t, aType, aOptions);
}
/* static */
already_AddRefed<ExtendableMessageEvent> ExtendableMessageEvent::Constructor(
mozilla::dom::EventTarget* aEventTarget, const nsAString& aType,
const ExtendableMessageEventInit& aOptions) {
RefPtr<ExtendableMessageEvent> event =
new ExtendableMessageEvent(aEventTarget);
event->InitEvent(aType, aOptions.mBubbles, aOptions.mCancelable);
bool trusted = event->Init(aEventTarget);
event->SetTrusted(trusted);
event->mData = aOptions.mData;
event->mOrigin = aOptions.mOrigin;
event->mLastEventId = aOptions.mLastEventId;
if (!aOptions.mSource.IsNull()) {
if (aOptions.mSource.Value().IsClient()) {
event->mClient = aOptions.mSource.Value().GetAsClient();
} else if (aOptions.mSource.Value().IsServiceWorker()) {
event->mServiceWorker = aOptions.mSource.Value().GetAsServiceWorker();
} else if (aOptions.mSource.Value().IsMessagePort()) {
event->mMessagePort = aOptions.mSource.Value().GetAsMessagePort();
}
}
event->mPorts.AppendElements(aOptions.mPorts);
return event.forget();
}
void ExtendableMessageEvent::GetPorts(nsTArray<RefPtr<MessagePort>>& aPorts) {
aPorts = mPorts;
}
NS_IMPL_CYCLE_COLLECTION_MULTI_ZONE_JSHOLDER_CLASS(ExtendableMessageEvent)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(ExtendableMessageEvent, Event)
tmp->mData.setUndefined();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mClient)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mServiceWorker)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mMessagePort)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPorts)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(ExtendableMessageEvent, Event)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mClient)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mServiceWorker)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMessagePort)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPorts)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(ExtendableMessageEvent, Event)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mData)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ExtendableMessageEvent)
NS_INTERFACE_MAP_END_INHERITING(Event)
NS_IMPL_ADDREF_INHERITED(ExtendableMessageEvent, Event)
NS_IMPL_RELEASE_INHERITED(ExtendableMessageEvent, Event)
} // namespace dom
} // namespace mozilla
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