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gecko-dev/dom/serviceworkers/ServiceWorkerRegistrar.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 "ServiceWorkerRegistrar.h"
#include "mozilla/dom/ServiceWorkerRegistrarTypes.h"
#include "mozilla/dom/DOMException.h"
#include "mozilla/net/MozURL.h"
#include "nsIEventTarget.h"
#include "nsIInputStream.h"
#include "nsILineInputStream.h"
#include "nsIObserverService.h"
#include "nsIOutputStream.h"
#include "nsISafeOutputStream.h"
#include "nsIServiceWorkerManager.h"
#include "MainThreadUtils.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/CycleCollectedJSContext.h"
#include "mozilla/dom/StorageActivityService.h"
#include "mozilla/ErrorNames.h"
#include "mozilla/ipc/BackgroundChild.h"
#include "mozilla/ipc/BackgroundParent.h"
#include "mozilla/ipc/PBackgroundChild.h"
#include "mozilla/ModuleUtils.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPtr.h"
#include "mozJSComponentLoader.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsContentUtils.h"
#include "nsDirectoryServiceUtils.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsServiceManagerUtils.h"
#include "nsThreadUtils.h"
#include "nsXULAppAPI.h"
#include "ServiceWorkerUtils.h"
using namespace mozilla::ipc;
namespace mozilla {
namespace dom {
namespace {
static const char* gSupportedRegistrarVersions[] = {
SERVICEWORKERREGISTRAR_VERSION,
"7",
"6",
"5",
"4",
"3",
"2"
};
static const uint32_t kInvalidGeneration = static_cast<uint32_t>(-1);
StaticRefPtr<ServiceWorkerRegistrar> gServiceWorkerRegistrar;
nsresult
GetOrigin(const nsACString& aURL, nsACString& aOrigin)
{
RefPtr<net::MozURL> url;
nsresult rv = net::MozURL::Init(getter_AddRefs(url), aURL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
url->Origin(aOrigin);
return NS_OK;
}
nsresult
ReadLine(nsILineInputStream* aStream, nsACString& aValue)
{
bool hasMoreLines;
nsresult rv = aStream->ReadLine(aValue, &hasMoreLines);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!hasMoreLines)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult
CreatePrincipalInfo(nsILineInputStream* aStream,
ServiceWorkerRegistrationData* aEntry,
bool aSkipSpec = false)
{
nsAutoCString suffix;
nsresult rv = ReadLine(aStream, suffix);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
OriginAttributes attrs;
if (!attrs.PopulateFromSuffix(suffix)) {
return NS_ERROR_INVALID_ARG;
}
if (aSkipSpec) {
nsAutoCString unused;
nsresult rv = ReadLine(aStream, unused);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
rv = ReadLine(aStream, aEntry->scope());
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCString origin;
rv = GetOrigin(aEntry->scope(), origin);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
aEntry->principal() =
mozilla::ipc::ContentPrincipalInfo(attrs, origin, aEntry->scope());
return NS_OK;
}
} // namespace
NS_IMPL_ISUPPORTS(ServiceWorkerRegistrar,
nsIObserver,
nsIAsyncShutdownBlocker)
void
ServiceWorkerRegistrar::Initialize()
{
MOZ_ASSERT(!gServiceWorkerRegistrar);
if (!XRE_IsParentProcess()) {
return;
}
gServiceWorkerRegistrar = new ServiceWorkerRegistrar();
ClearOnShutdown(&gServiceWorkerRegistrar);
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
DebugOnly<nsresult> rv = obs->AddObserver(gServiceWorkerRegistrar,
"profile-after-change", false);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
}
/* static */ already_AddRefed<ServiceWorkerRegistrar>
ServiceWorkerRegistrar::Get()
{
MOZ_ASSERT(XRE_IsParentProcess());
MOZ_ASSERT(gServiceWorkerRegistrar);
RefPtr<ServiceWorkerRegistrar> service = gServiceWorkerRegistrar.get();
return service.forget();
}
ServiceWorkerRegistrar::ServiceWorkerRegistrar()
: mMonitor("ServiceWorkerRegistrar.mMonitor")
, mDataLoaded(false)
, mDataGeneration(kInvalidGeneration)
, mFileGeneration(kInvalidGeneration)
, mRetryCount(0)
, mShuttingDown(false)
, mRunnableDispatched(false)
{
MOZ_ASSERT(NS_IsMainThread());
}
ServiceWorkerRegistrar::~ServiceWorkerRegistrar()
{
MOZ_ASSERT(!mRunnableDispatched);
}
void
ServiceWorkerRegistrar::GetRegistrations(
nsTArray<ServiceWorkerRegistrationData>& aValues)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aValues.IsEmpty());
MonitorAutoLock lock(mMonitor);
// If we don't have the profile directory, profile is not started yet (and
// probably we are in a utest).
if (!mProfileDir) {
return;
}
// We care just about the first execution because this can be blocked by
// loading data from disk.
static bool firstTime = true;
TimeStamp startTime;
if (firstTime) {
startTime = TimeStamp::NowLoRes();
}
// Waiting for data loaded.
mMonitor.AssertCurrentThreadOwns();
while (!mDataLoaded) {
mMonitor.Wait();
}
aValues.AppendElements(mData);
MaybeResetGeneration();
MOZ_DIAGNOSTIC_ASSERT(mDataGeneration != kInvalidGeneration);
MOZ_DIAGNOSTIC_ASSERT(mFileGeneration != kInvalidGeneration);
if (firstTime) {
firstTime = false;
Telemetry::AccumulateTimeDelta(
Telemetry::SERVICE_WORKER_REGISTRATION_LOADING,
startTime);
}
}
namespace {
bool Equivalent(const ServiceWorkerRegistrationData& aLeft,
const ServiceWorkerRegistrationData& aRight)
{
MOZ_ASSERT(aLeft.principal().type() ==
mozilla::ipc::PrincipalInfo::TContentPrincipalInfo);
MOZ_ASSERT(aRight.principal().type() ==
mozilla::ipc::PrincipalInfo::TContentPrincipalInfo);
const auto& leftPrincipal = aLeft.principal().get_ContentPrincipalInfo();
const auto& rightPrincipal = aRight.principal().get_ContentPrincipalInfo();
// Only compare the attributes, not the spec part of the principal.
// The scope comparison above already covers the origin and codebase
// principals include the full path in their spec which is not what
// we want here.
return aLeft.scope() == aRight.scope() &&
leftPrincipal.attrs() == rightPrincipal.attrs();
}
} // anonymous namespace
void
ServiceWorkerRegistrar::RegisterServiceWorker(
const ServiceWorkerRegistrationData& aData)
{
AssertIsOnBackgroundThread();
if (mShuttingDown) {
NS_WARNING("Failed to register a serviceWorker during shutting down.");
return;
}
{
MonitorAutoLock lock(mMonitor);
MOZ_ASSERT(mDataLoaded);
RegisterServiceWorkerInternal(aData);
}
MaybeScheduleSaveData();
StorageActivityService::SendActivity(aData.principal());
}
void
ServiceWorkerRegistrar::UnregisterServiceWorker(
const PrincipalInfo& aPrincipalInfo,
const nsACString& aScope)
{
AssertIsOnBackgroundThread();
if (mShuttingDown) {
NS_WARNING("Failed to unregister a serviceWorker during shutting down.");
return;
}
bool deleted = false;
{
MonitorAutoLock lock(mMonitor);
MOZ_ASSERT(mDataLoaded);
ServiceWorkerRegistrationData tmp;
tmp.principal() = aPrincipalInfo;
tmp.scope() = aScope;
for (uint32_t i = 0; i < mData.Length(); ++i) {
if (Equivalent(tmp, mData[i])) {
mData.RemoveElementAt(i);
mDataGeneration = GetNextGeneration();
deleted = true;
break;
}
}
}
if (deleted) {
MaybeScheduleSaveData();
StorageActivityService::SendActivity(aPrincipalInfo);
}
}
void
ServiceWorkerRegistrar::RemoveAll()
{
AssertIsOnBackgroundThread();
if (mShuttingDown) {
NS_WARNING("Failed to remove all the serviceWorkers during shutting down.");
return;
}
bool deleted = false;
nsTArray<ServiceWorkerRegistrationData> data;
{
MonitorAutoLock lock(mMonitor);
MOZ_ASSERT(mDataLoaded);
// Let's take a copy in order to inform StorageActivityService.
data = mData;
deleted = !mData.IsEmpty();
mData.Clear();
mDataGeneration = GetNextGeneration();
}
if (!deleted) {
return;
}
MaybeScheduleSaveData();
for (uint32_t i = 0, len = data.Length(); i < len; ++i) {
StorageActivityService::SendActivity(data[i].principal());
}
}
void
ServiceWorkerRegistrar::LoadData()
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(!mDataLoaded);
nsresult rv = ReadData();
if (NS_WARN_IF(NS_FAILED(rv))) {
DeleteData();
// Also if the reading failed we have to notify what is waiting for data.
}
MonitorAutoLock lock(mMonitor);
MOZ_ASSERT(!mDataLoaded);
mDataLoaded = true;
mMonitor.Notify();
}
nsresult
ServiceWorkerRegistrar::ReadData()
{
// We cannot assert about the correct thread because normally this method
// runs on a IO thread, but in gTests we call it from the main-thread.
nsCOMPtr<nsIFile> file;
{
MonitorAutoLock lock(mMonitor);
if (!mProfileDir) {
return NS_ERROR_FAILURE;
}
nsresult rv = mProfileDir->Clone(getter_AddRefs(file));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
nsresult rv = file->Append(NS_LITERAL_STRING(SERVICEWORKERREGISTRAR_FILE));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
bool exists;
rv = file->Exists(&exists);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!exists) {
return NS_OK;
}
nsCOMPtr<nsIInputStream> stream;
rv = NS_NewLocalFileInputStream(getter_AddRefs(stream), file);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCOMPtr<nsILineInputStream> lineInputStream = do_QueryInterface(stream);
MOZ_ASSERT(lineInputStream);
nsAutoCString version;
bool hasMoreLines;
rv = lineInputStream->ReadLine(version, &hasMoreLines);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!IsSupportedVersion(version)) {
nsContentUtils::LogMessageToConsole(nsPrintfCString(
"Unsupported service worker registrar version: %s", version.get()).get());
return NS_ERROR_FAILURE;
}
nsTArray<ServiceWorkerRegistrationData> tmpData;
bool overwrite = false;
bool dedupe = false;
while (hasMoreLines) {
ServiceWorkerRegistrationData* entry = tmpData.AppendElement();
#define GET_LINE(x) \
rv = lineInputStream->ReadLine(x, &hasMoreLines); \
if (NS_WARN_IF(NS_FAILED(rv))) { \
return rv; \
} \
if (NS_WARN_IF(!hasMoreLines)) { \
return NS_ERROR_FAILURE; \
}
nsAutoCString line;
if (version.EqualsLiteral(SERVICEWORKERREGISTRAR_VERSION)) {
rv = CreatePrincipalInfo(lineInputStream, entry);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
GET_LINE(entry->currentWorkerURL());
nsAutoCString fetchFlag;
GET_LINE(fetchFlag);
if (!fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_TRUE) &&
!fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_FALSE)) {
return NS_ERROR_INVALID_ARG;
}
entry->currentWorkerHandlesFetch() =
fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_TRUE);
nsAutoCString cacheName;
GET_LINE(cacheName);
CopyUTF8toUTF16(cacheName, entry->cacheName());
nsAutoCString updateViaCache;
GET_LINE(updateViaCache);
entry->updateViaCache() = updateViaCache.ToInteger(&rv, 16);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
} else if (entry->updateViaCache() > nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_NONE) {
return NS_ERROR_INVALID_ARG;
}
nsAutoCString installedTimeStr;
GET_LINE(installedTimeStr);
int64_t installedTime = installedTimeStr.ToInteger64(&rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
entry->currentWorkerInstalledTime() = installedTime;
nsAutoCString activatedTimeStr;
GET_LINE(activatedTimeStr);
int64_t activatedTime = activatedTimeStr.ToInteger64(&rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
entry->currentWorkerActivatedTime() = activatedTime;
nsAutoCString lastUpdateTimeStr;
GET_LINE(lastUpdateTimeStr);
int64_t lastUpdateTime = lastUpdateTimeStr.ToInteger64(&rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
entry->lastUpdateTime() = lastUpdateTime;
} else if (version.EqualsLiteral("7")) {
rv = CreatePrincipalInfo(lineInputStream, entry);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
GET_LINE(entry->currentWorkerURL());
nsAutoCString fetchFlag;
GET_LINE(fetchFlag);
if (!fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_TRUE) &&
!fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_FALSE)) {
return NS_ERROR_INVALID_ARG;
}
entry->currentWorkerHandlesFetch() =
fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_TRUE);
nsAutoCString cacheName;
GET_LINE(cacheName);
CopyUTF8toUTF16(cacheName, entry->cacheName());
nsAutoCString loadFlags;
GET_LINE(loadFlags);
entry->updateViaCache() =
loadFlags.ToInteger(&rv, 16) == nsIRequest::LOAD_NORMAL
? nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_ALL
: nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_IMPORTS;
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsAutoCString installedTimeStr;
GET_LINE(installedTimeStr);
int64_t installedTime = installedTimeStr.ToInteger64(&rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
entry->currentWorkerInstalledTime() = installedTime;
nsAutoCString activatedTimeStr;
GET_LINE(activatedTimeStr);
int64_t activatedTime = activatedTimeStr.ToInteger64(&rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
entry->currentWorkerActivatedTime() = activatedTime;
nsAutoCString lastUpdateTimeStr;
GET_LINE(lastUpdateTimeStr);
int64_t lastUpdateTime = lastUpdateTimeStr.ToInteger64(&rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
entry->lastUpdateTime() = lastUpdateTime;
} else if (version.EqualsLiteral("6")) {
rv = CreatePrincipalInfo(lineInputStream, entry);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
GET_LINE(entry->currentWorkerURL());
nsAutoCString fetchFlag;
GET_LINE(fetchFlag);
if (!fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_TRUE) &&
!fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_FALSE)) {
return NS_ERROR_INVALID_ARG;
}
entry->currentWorkerHandlesFetch() =
fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_TRUE);
nsAutoCString cacheName;
GET_LINE(cacheName);
CopyUTF8toUTF16(cacheName, entry->cacheName());
nsAutoCString loadFlags;
GET_LINE(loadFlags);
entry->updateViaCache() =
loadFlags.ToInteger(&rv, 16) == nsIRequest::LOAD_NORMAL
? nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_ALL
: nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_IMPORTS;
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
entry->currentWorkerInstalledTime() = 0;
entry->currentWorkerActivatedTime() = 0;
entry->lastUpdateTime() = 0;
} else if (version.EqualsLiteral("5")) {
overwrite = true;
dedupe = true;
rv = CreatePrincipalInfo(lineInputStream, entry);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
GET_LINE(entry->currentWorkerURL());
nsAutoCString fetchFlag;
GET_LINE(fetchFlag);
if (!fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_TRUE) &&
!fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_FALSE)) {
return NS_ERROR_INVALID_ARG;
}
entry->currentWorkerHandlesFetch() =
fetchFlag.EqualsLiteral(SERVICEWORKERREGISTRAR_TRUE);
nsAutoCString cacheName;
GET_LINE(cacheName);
CopyUTF8toUTF16(cacheName, entry->cacheName());
entry->updateViaCache() =
nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_IMPORTS;
entry->currentWorkerInstalledTime() = 0;
entry->currentWorkerActivatedTime() = 0;
entry->lastUpdateTime() = 0;
} else if (version.EqualsLiteral("4")) {
overwrite = true;
dedupe = true;
rv = CreatePrincipalInfo(lineInputStream, entry);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
GET_LINE(entry->currentWorkerURL());
// default handlesFetch flag to Enabled
entry->currentWorkerHandlesFetch() = true;
nsAutoCString cacheName;
GET_LINE(cacheName);
CopyUTF8toUTF16(cacheName, entry->cacheName());
entry->updateViaCache() =
nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_IMPORTS;
entry->currentWorkerInstalledTime() = 0;
entry->currentWorkerActivatedTime() = 0;
entry->lastUpdateTime() = 0;
} else if (version.EqualsLiteral("3")) {
overwrite = true;
dedupe = true;
rv = CreatePrincipalInfo(lineInputStream, entry, true);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
GET_LINE(entry->currentWorkerURL());
// default handlesFetch flag to Enabled
entry->currentWorkerHandlesFetch() = true;
nsAutoCString cacheName;
GET_LINE(cacheName);
CopyUTF8toUTF16(cacheName, entry->cacheName());
entry->updateViaCache() =
nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_IMPORTS;
entry->currentWorkerInstalledTime() = 0;
entry->currentWorkerActivatedTime() = 0;
entry->lastUpdateTime() = 0;
} else if (version.EqualsLiteral("2")) {
overwrite = true;
dedupe = true;
rv = CreatePrincipalInfo(lineInputStream, entry, true);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// scriptSpec is no more used in latest version.
nsAutoCString unused;
GET_LINE(unused);
GET_LINE(entry->currentWorkerURL());
// default handlesFetch flag to Enabled
entry->currentWorkerHandlesFetch() = true;
nsAutoCString cacheName;
GET_LINE(cacheName);
CopyUTF8toUTF16(cacheName, entry->cacheName());
// waitingCacheName is no more used in latest version.
GET_LINE(unused);
entry->updateViaCache() =
nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_IMPORTS;
entry->currentWorkerInstalledTime() = 0;
entry->currentWorkerActivatedTime() = 0;
entry->lastUpdateTime() = 0;
} else {
MOZ_ASSERT_UNREACHABLE("Should never get here!");
}
#undef GET_LINE
rv = lineInputStream->ReadLine(line, &hasMoreLines);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!line.EqualsLiteral(SERVICEWORKERREGISTRAR_TERMINATOR)) {
return NS_ERROR_FAILURE;
}
}
stream->Close();
// XXX: The following code is writing to mData without holding a
// monitor lock. This might be ok since this is currently
// only called at startup where we block the main thread
// preventing further operation until it completes. We should
// consider better locking here in the future.
// Copy data over to mData.
for (uint32_t i = 0; i < tmpData.Length(); ++i) {
// Older versions could sometimes write out empty, useless entries.
// Prune those here.
if (!ServiceWorkerRegistrationDataIsValid(tmpData[i])) {
continue;
}
bool match = false;
if (dedupe) {
MOZ_ASSERT(overwrite);
// If this is an old profile, then we might need to deduplicate. In
// theory this can be removed in the future (Bug 1248449)
for (uint32_t j = 0; j < mData.Length(); ++j) {
// Use same comparison as RegisterServiceWorker. Scope contains
// basic origin information. Combine with any principal attributes.
if (Equivalent(tmpData[i], mData[j])) {
// Last match wins, just like legacy loading used to do in
// the ServiceWorkerManager.
mData[j] = tmpData[i];
// Dupe found, so overwrite file with reduced list.
match = true;
break;
}
}
} else {
#ifdef DEBUG
// Otherwise assert no duplications in debug builds.
for (uint32_t j = 0; j < mData.Length(); ++j) {
MOZ_ASSERT(!Equivalent(tmpData[i], mData[j]));
}
#endif
}
if (!match) {
mData.AppendElement(tmpData[i]);
}
}
// Overwrite previous version.
// Cannot call SaveData directly because gtest uses main-thread.
if (overwrite && NS_FAILED(WriteData(mData))) {
NS_WARNING("Failed to write data for the ServiceWorker Registations.");
DeleteData();
}
return NS_OK;
}
void
ServiceWorkerRegistrar::DeleteData()
{
// We cannot assert about the correct thread because normally this method
// runs on a IO thread, but in gTests we call it from the main-thread.
nsCOMPtr<nsIFile> file;
{
MonitorAutoLock lock(mMonitor);
mData.Clear();
if (!mProfileDir) {
return;
}
nsresult rv = mProfileDir->Clone(getter_AddRefs(file));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
}
nsresult rv = file->Append(NS_LITERAL_STRING(SERVICEWORKERREGISTRAR_FILE));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
rv = file->Remove(false);
if (rv == NS_ERROR_FILE_NOT_FOUND) {
return;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
}
void
ServiceWorkerRegistrar::RegisterServiceWorkerInternal(const ServiceWorkerRegistrationData& aData)
{
bool found = false;
for (uint32_t i = 0, len = mData.Length(); i < len; ++i) {
if (Equivalent(aData, mData[i])) {
mData[i] = aData;
found = true;
break;
}
}
if (!found) {
MOZ_ASSERT(ServiceWorkerRegistrationDataIsValid(aData));
mData.AppendElement(aData);
}
mDataGeneration = GetNextGeneration();
}
class ServiceWorkerRegistrarSaveDataRunnable final : public Runnable
{
nsCOMPtr<nsIEventTarget> mEventTarget;
const nsTArray<ServiceWorkerRegistrationData> mData;
const uint32_t mGeneration;
public:
ServiceWorkerRegistrarSaveDataRunnable(nsTArray<ServiceWorkerRegistrationData>&& aData,
uint32_t aGeneration)
: Runnable("dom::ServiceWorkerRegistrarSaveDataRunnable")
, mEventTarget(GetCurrentThreadEventTarget())
, mData(std::move(aData))
, mGeneration(aGeneration)
{
AssertIsOnBackgroundThread();
MOZ_DIAGNOSTIC_ASSERT(mGeneration != kInvalidGeneration);
}
NS_IMETHOD
Run() override
{
RefPtr<ServiceWorkerRegistrar> service = ServiceWorkerRegistrar::Get();
MOZ_ASSERT(service);
uint32_t fileGeneration = kInvalidGeneration;
if (NS_SUCCEEDED(service->SaveData(mData))) {
fileGeneration = mGeneration;
}
RefPtr<Runnable> runnable =
NewRunnableMethod<uint32_t>("ServiceWorkerRegistrar::DataSaved",
service,
&ServiceWorkerRegistrar::DataSaved,
fileGeneration);
MOZ_ALWAYS_SUCCEEDS(
mEventTarget->Dispatch(runnable.forget(), NS_DISPATCH_NORMAL));
return NS_OK;
}
};
void
ServiceWorkerRegistrar::MaybeScheduleSaveData()
{
AssertIsOnBackgroundThread();
MOZ_ASSERT(!mShuttingDown);
if (mShuttingDown || mRunnableDispatched ||
mDataGeneration <= mFileGeneration) {
return;
}
nsCOMPtr<nsIEventTarget> target =
do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
MOZ_ASSERT(target, "Must have stream transport service");
uint32_t generation = kInvalidGeneration;
nsTArray<ServiceWorkerRegistrationData> data;
{
MonitorAutoLock lock(mMonitor);
generation = mDataGeneration;
data.AppendElements(mData);
}
RefPtr<Runnable> runnable =
new ServiceWorkerRegistrarSaveDataRunnable(std::move(data), generation);
nsresult rv = target->Dispatch(runnable.forget(), NS_DISPATCH_NORMAL);
NS_ENSURE_SUCCESS_VOID(rv);
mRunnableDispatched = true;
}
void
ServiceWorkerRegistrar::ShutdownCompleted()
{
MOZ_ASSERT(NS_IsMainThread());
DebugOnly<nsresult> rv = GetShutdownPhase()->RemoveBlocker(this);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
nsresult
ServiceWorkerRegistrar::SaveData(const nsTArray<ServiceWorkerRegistrationData>& aData)
{
MOZ_ASSERT(!NS_IsMainThread());
nsresult rv = WriteData(aData);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to write data for the ServiceWorker Registations.");
// Don't touch the file or in-memory state. Writing files can
// sometimes fail due to virus scanning, etc. We should just leave
// things as is so the next save operation can pick up any changes
// without losing data.
}
return rv;
}
void
ServiceWorkerRegistrar::DataSaved(uint32_t aFileGeneration)
{
AssertIsOnBackgroundThread();
MOZ_ASSERT(mRunnableDispatched);
mRunnableDispatched = false;
// Check for shutdown before possibly triggering any more saves
// runnables.
MaybeScheduleShutdownCompleted();
if (mShuttingDown) {
return;
}
// If we got a valid generation, then the save was successful.
if (aFileGeneration != kInvalidGeneration) {
// Update the file generation. We also check to see if we
// can reset the generation back to zero if the file and data
// are now in sync. This allows us to avoid dealing with wrap
// around of the generation count.
mFileGeneration = aFileGeneration;
MaybeResetGeneration();
// Successful write resets the retry count.
mRetryCount = 0;
// Possibly schedule another save operation if more data
// has come in while processing this one.
MaybeScheduleSaveData();
return;
}
// Otherwise, the save failed since the generation is invalid. We
// want to retry the save, but only a limited number of times.
static const uint32_t kMaxRetryCount = 2;
if (mRetryCount >= kMaxRetryCount) {
return;
}
mRetryCount += 1;
MaybeScheduleSaveData();
}
void
ServiceWorkerRegistrar::MaybeScheduleShutdownCompleted()
{
AssertIsOnBackgroundThread();
if (mRunnableDispatched || !mShuttingDown) {
return;
}
RefPtr<Runnable> runnable =
NewRunnableMethod("dom::ServiceWorkerRegistrar::ShutdownCompleted",
this,
&ServiceWorkerRegistrar::ShutdownCompleted);
MOZ_ALWAYS_SUCCEEDS(NS_DispatchToMainThread(runnable.forget()));
}
uint32_t
ServiceWorkerRegistrar::GetNextGeneration()
{
uint32_t ret = mDataGeneration + 1;
if (ret == kInvalidGeneration) {
ret += 1;
}
return ret;
}
void
ServiceWorkerRegistrar::MaybeResetGeneration()
{
if (mDataGeneration != mFileGeneration) {
return;
}
mDataGeneration = mFileGeneration = 0;
}
bool
ServiceWorkerRegistrar::IsSupportedVersion(const nsACString& aVersion) const
{
uint32_t numVersions = ArrayLength(gSupportedRegistrarVersions);
for (uint32_t i = 0; i < numVersions; i++) {
if (aVersion.EqualsASCII(gSupportedRegistrarVersions[i])) {
return true;
}
}
return false;
}
nsresult
ServiceWorkerRegistrar::WriteData(const nsTArray<ServiceWorkerRegistrationData>& aData)
{
// We cannot assert about the correct thread because normally this method
// runs on a IO thread, but in gTests we call it from the main-thread.
nsCOMPtr<nsIFile> file;
{
MonitorAutoLock lock(mMonitor);
if (!mProfileDir) {
return NS_ERROR_FAILURE;
}
nsresult rv = mProfileDir->Clone(getter_AddRefs(file));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
nsresult rv = file->Append(NS_LITERAL_STRING(SERVICEWORKERREGISTRAR_FILE));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCOMPtr<nsIOutputStream> stream;
rv = NS_NewSafeLocalFileOutputStream(getter_AddRefs(stream), file);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsAutoCString buffer;
buffer.AppendLiteral(SERVICEWORKERREGISTRAR_VERSION);
buffer.Append('\n');
uint32_t count;
rv = stream->Write(buffer.Data(), buffer.Length(), &count);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (count != buffer.Length()) {
return NS_ERROR_UNEXPECTED;
}
for (uint32_t i = 0, len = aData.Length(); i < len; ++i) {
// We have an assertion further up the stack, but as a last
// resort avoid writing out broken entries here.
if (!ServiceWorkerRegistrationDataIsValid(aData[i])) {
continue;
}
const mozilla::ipc::PrincipalInfo& info = aData[i].principal();
MOZ_ASSERT(info.type() == mozilla::ipc::PrincipalInfo::TContentPrincipalInfo);
const mozilla::ipc::ContentPrincipalInfo& cInfo =
info.get_ContentPrincipalInfo();
nsAutoCString suffix;
cInfo.attrs().CreateSuffix(suffix);
buffer.Truncate();
buffer.Append(suffix.get());
buffer.Append('\n');
buffer.Append(aData[i].scope());
buffer.Append('\n');
buffer.Append(aData[i].currentWorkerURL());
buffer.Append('\n');
buffer.Append(aData[i].currentWorkerHandlesFetch() ?
SERVICEWORKERREGISTRAR_TRUE : SERVICEWORKERREGISTRAR_FALSE);
buffer.Append('\n');
buffer.Append(NS_ConvertUTF16toUTF8(aData[i].cacheName()));
buffer.Append('\n');
buffer.AppendInt(aData[i].updateViaCache(), 16);
buffer.Append('\n');
MOZ_DIAGNOSTIC_ASSERT(
aData[i].updateViaCache() == nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_IMPORTS ||
aData[i].updateViaCache() == nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_ALL ||
aData[i].updateViaCache() == nsIServiceWorkerRegistrationInfo::UPDATE_VIA_CACHE_NONE
);
static_assert(nsIRequest::LOAD_NORMAL == 0,
"LOAD_NORMAL matches serialized value.");
static_assert(nsIRequest::VALIDATE_ALWAYS == (1 << 11),
"VALIDATE_ALWAYS matches serialized value");
buffer.AppendInt(aData[i].currentWorkerInstalledTime());
buffer.Append('\n');
buffer.AppendInt(aData[i].currentWorkerActivatedTime());
buffer.Append('\n');
buffer.AppendInt(aData[i].lastUpdateTime());
buffer.Append('\n');
buffer.AppendLiteral(SERVICEWORKERREGISTRAR_TERMINATOR);
buffer.Append('\n');
rv = stream->Write(buffer.Data(), buffer.Length(), &count);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (count != buffer.Length()) {
return NS_ERROR_UNEXPECTED;
}
}
nsCOMPtr<nsISafeOutputStream> safeStream = do_QueryInterface(stream);
MOZ_ASSERT(safeStream);
rv = safeStream->Finish();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
void
ServiceWorkerRegistrar::ProfileStarted()
{
MOZ_ASSERT(NS_IsMainThread());
MonitorAutoLock lock(mMonitor);
MOZ_DIAGNOSTIC_ASSERT(!mProfileDir);
nsresult rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
getter_AddRefs(mProfileDir));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
rv = GetShutdownPhase()->AddBlocker(
this, NS_LITERAL_STRING(__FILE__), __LINE__,
NS_LITERAL_STRING("ServiceWorkerRegistrar: Flushing data"));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
nsCOMPtr<nsIEventTarget> target =
do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
MOZ_ASSERT(target, "Must have stream transport service");
nsCOMPtr<nsIRunnable> runnable =
NewRunnableMethod("dom::ServiceWorkerRegistrar::LoadData",
this,
&ServiceWorkerRegistrar::LoadData);
rv = target->Dispatch(runnable.forget(), NS_DISPATCH_NORMAL);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to dispatch the LoadDataRunnable.");
}
}
void
ServiceWorkerRegistrar::ProfileStopped()
{
MOZ_ASSERT(NS_IsMainThread());
MonitorAutoLock lock(mMonitor);
if (!mProfileDir) {
nsresult rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
getter_AddRefs(mProfileDir));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
}
PBackgroundChild* child = BackgroundChild::GetForCurrentThread();
if (!child) {
// Mutations to the ServiceWorkerRegistrar happen on the PBackground thread,
// issued by the ServiceWorkerManagerService, so the appropriate place to
// trigger shutdown is on that thread.
//
// However, it's quite possible that the PBackground thread was not brought
// into existence for xpcshell tests. We don't cause it to be created
// ourselves for any reason, for example.
//
// In this scenario, we know that:
// - We will receive exactly one call to ourself from BlockShutdown() and
// BlockShutdown() will be called (at most) once.
// - The only way our Shutdown() method gets called is via
// BackgroundParentImpl::RecvShutdownServiceWorkerRegistrar() being
// invoked, which only happens if we get to that send below here that we
// can't get to.
// - All Shutdown() does is set mShuttingDown=true (essential for
// invariants) and invoke MaybeScheduleShutdownCompleted().
// - Since there is no PBackground thread, mRunnableDispatched must be false
// because only MaybeScheduleSaveData() set it and it only runs on the
// background thread, so it cannot have run. And so we would expect
// MaybeScheduleShutdownCompleted() to schedule an invocation of
// ShutdownCompleted on the main thread.
//
// So it's appropriate for us to set mShuttingDown=true (as Shutdown would
// do) and directly invoke ShutdownCompleted() (as Shutdown would indirectly
// do via MaybeScheduleShutdownCompleted).
mShuttingDown = true;
ShutdownCompleted();
return;
}
child->SendShutdownServiceWorkerRegistrar();
}
// Async shutdown blocker methods
NS_IMETHODIMP
ServiceWorkerRegistrar::BlockShutdown(nsIAsyncShutdownClient* aClient)
{
ProfileStopped();
return NS_OK;
}
NS_IMETHODIMP
ServiceWorkerRegistrar::GetName(nsAString& aName)
{
aName = NS_LITERAL_STRING("ServiceWorkerRegistrar: Flushing data");
return NS_OK;
}
NS_IMETHODIMP
ServiceWorkerRegistrar::GetState(nsIPropertyBag**)
{
return NS_OK;
}
#define RELEASE_ASSERT_SUCCEEDED(rv, name) do { \
if (NS_FAILED(rv)) { \
mozJSComponentLoader::Get()->AnnotateCrashReport(); \
if (rv == NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS) { \
if (auto* context = CycleCollectedJSContext::Get()) { \
if (RefPtr<Exception> exn = context->GetPendingException()) { \
MOZ_CRASH_UNSAFE_PRINTF("Failed to get " name ": %s", \
exn->GetMessageMoz().get()); \
} \
} \
} \
\
nsAutoCString errorName; \
GetErrorName(rv, errorName); \
MOZ_CRASH_UNSAFE_PRINTF("Failed to get " name ": %s", \
errorName.get()); \
} \
} while (0)
nsCOMPtr<nsIAsyncShutdownClient>
ServiceWorkerRegistrar::GetShutdownPhase() const
{
nsresult rv;
nsCOMPtr<nsIAsyncShutdownService> svc = do_GetService(
"@mozilla.org/async-shutdown-service;1", &rv);
// If this fails, something is very wrong on the JS side (or we're out of
// memory), and there's no point in continuing startup. Include as much
// information as possible in the crash report.
RELEASE_ASSERT_SUCCEEDED(rv, "async shutdown service");
nsCOMPtr<nsIAsyncShutdownClient> client;
rv = svc->GetProfileBeforeChange(getter_AddRefs(client));
RELEASE_ASSERT_SUCCEEDED(rv, "profileBeforeChange shutdown blocker");
return client;
}
#undef RELEASE_ASSERT_SUCCEEDED
void
ServiceWorkerRegistrar::Shutdown()
{
AssertIsOnBackgroundThread();
MOZ_ASSERT(!mShuttingDown);
mShuttingDown = true;
MaybeScheduleShutdownCompleted();
}
NS_IMETHODIMP
ServiceWorkerRegistrar::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData)
{
MOZ_ASSERT(NS_IsMainThread());
if (!strcmp(aTopic, "profile-after-change")) {
nsCOMPtr<nsIObserverService> observerService =
services::GetObserverService();
observerService->RemoveObserver(this, "profile-after-change");
// The profile is fully loaded, now we can proceed with the loading of data
// from disk.
ProfileStarted();
return NS_OK;
}
MOZ_ASSERT(false, "ServiceWorkerRegistrar got unexpected topic!");
return NS_ERROR_UNEXPECTED;
}
} // namespace dom
} // namespace mozilla
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