gecko-dev/dom/workers/ServiceWorkerUpdateJob.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 "ServiceWorkerUpdateJob.h"
#include "nsIScriptError.h"
#include "nsIURL.h"
#include "ServiceWorkerScriptCache.h"
#include "Workers.h"
namespace mozilla {
namespace dom {
namespace workers {
namespace {
/**
* The spec mandates slightly different behaviors for computing the scope
* prefix string in case a Service-Worker-Allowed header is specified versus
* when it's not available.
*
* With the header:
* "Set maxScopeString to "/" concatenated with the strings in maxScope's
* path (including empty strings), separated from each other by "/"."
* Without the header:
* "Set maxScopeString to "/" concatenated with the strings, except the last
* string that denotes the script's file name, in registration's registering
* script url's path (including empty strings), separated from each other by
* "/"."
*
* In simpler terms, if the header is not present, we should only use the
* "directory" part of the pathname, and otherwise the entire pathname should be
* used. ScopeStringPrefixMode allows the caller to specify the desired
* behavior.
*/
enum ScopeStringPrefixMode {
eUseDirectory,
eUsePath
};
nsresult
GetRequiredScopeStringPrefix(nsIURI* aScriptURI, nsACString& aPrefix,
ScopeStringPrefixMode aPrefixMode)
{
nsresult rv = aScriptURI->GetPrePath(aPrefix);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (aPrefixMode == eUseDirectory) {
nsCOMPtr<nsIURL> scriptURL(do_QueryInterface(aScriptURI));
if (NS_WARN_IF(!scriptURL)) {
return NS_ERROR_FAILURE;
}
nsAutoCString dir;
rv = scriptURL->GetDirectory(dir);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
aPrefix.Append(dir);
} else if (aPrefixMode == eUsePath) {
nsAutoCString path;
rv = aScriptURI->GetPath(path);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
aPrefix.Append(path);
} else {
MOZ_ASSERT_UNREACHABLE("Invalid value for aPrefixMode");
}
return NS_OK;
}
} // anonymous namespace
class ServiceWorkerUpdateJob::CompareCallback final : public serviceWorkerScriptCache::CompareCallback
{
RefPtr<ServiceWorkerUpdateJob> mJob;
~CompareCallback()
{
}
public:
explicit CompareCallback(ServiceWorkerUpdateJob* aJob)
: mJob(aJob)
{
MOZ_ASSERT(mJob);
}
virtual void
ComparisonResult(nsresult aStatus,
bool aInCacheAndEqual,
const nsAString& aNewCacheName,
const nsACString& aMaxScope) override
{
mJob->ComparisonResult(aStatus, aInCacheAndEqual, aNewCacheName, aMaxScope);
}
NS_INLINE_DECL_REFCOUNTING(ServiceWorkerUpdateJob::CompareCallback, override)
};
class ServiceWorkerUpdateJob::ContinueUpdateRunnable final : public LifeCycleEventCallback
{
nsMainThreadPtrHandle<ServiceWorkerUpdateJob> mJob;
bool mSuccess;
public:
explicit ContinueUpdateRunnable(const nsMainThreadPtrHandle<ServiceWorkerUpdateJob>& aJob)
: mJob(aJob)
, mSuccess(false)
{
AssertIsOnMainThread();
}
void
SetResult(bool aResult) override
{
mSuccess = aResult;
}
NS_IMETHOD
Run() override
{
AssertIsOnMainThread();
mJob->ContinueUpdateAfterScriptEval(mSuccess);
mJob = nullptr;
return NS_OK;
}
};
class ServiceWorkerUpdateJob::ContinueInstallRunnable final : public LifeCycleEventCallback
{
nsMainThreadPtrHandle<ServiceWorkerUpdateJob> mJob;
bool mSuccess;
public:
explicit ContinueInstallRunnable(const nsMainThreadPtrHandle<ServiceWorkerUpdateJob>& aJob)
: mJob(aJob)
, mSuccess(false)
{
AssertIsOnMainThread();
}
void
SetResult(bool aResult) override
{
mSuccess = aResult;
}
NS_IMETHOD
Run() override
{
AssertIsOnMainThread();
mJob->ContinueAfterInstallEvent(mSuccess);
mJob = nullptr;
return NS_OK;
}
};
ServiceWorkerUpdateJob::ServiceWorkerUpdateJob(nsIPrincipal* aPrincipal,
const nsACString& aScope,
const nsACString& aScriptSpec,
nsILoadGroup* aLoadGroup)
: ServiceWorkerJob(Type::Update, aPrincipal, aScope, aScriptSpec)
, mLoadGroup(aLoadGroup)
{
}
already_AddRefed<ServiceWorkerRegistrationInfo>
ServiceWorkerUpdateJob::GetRegistration() const
{
AssertIsOnMainThread();
RefPtr<ServiceWorkerRegistrationInfo> ref = mRegistration;
return ref.forget();
}
ServiceWorkerUpdateJob::ServiceWorkerUpdateJob(Type aType,
nsIPrincipal* aPrincipal,
const nsACString& aScope,
const nsACString& aScriptSpec,
nsILoadGroup* aLoadGroup)
: ServiceWorkerJob(aType, aPrincipal, aScope, aScriptSpec)
, mLoadGroup(aLoadGroup)
{
}
ServiceWorkerUpdateJob::~ServiceWorkerUpdateJob()
{
}
void
ServiceWorkerUpdateJob::FailUpdateJob(ErrorResult& aRv)
{
AssertIsOnMainThread();
MOZ_ASSERT(aRv.Failed());
// Cleanup after a failed installation. This essentially implements
// step 12 of the Install algorithm.
//
// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#installation-algorithm
//
// The spec currently only runs this after an install event fails,
// but we must handle many more internal errors. So we check for
// cleanup on every non-successful exit.
if (mRegistration) {
mRegistration->ClearEvaluating();
mRegistration->ClearInstalling();
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (swm) {
swm->MaybeRemoveRegistration(mRegistration);
}
}
mRegistration = nullptr;
Finish(aRv);
}
void
ServiceWorkerUpdateJob::FailUpdateJob(nsresult aRv)
{
ErrorResult rv(aRv);
FailUpdateJob(rv);
}
void
ServiceWorkerUpdateJob::AsyncExecute()
{
AssertIsOnMainThread();
MOZ_ASSERT(GetType() == Type::Update);
if (Canceled()) {
FailUpdateJob(NS_ERROR_DOM_ABORT_ERR);
return;
}
// Begin step 1 of the Update algorithm.
//
// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#update-algorithm
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
RefPtr<ServiceWorkerRegistrationInfo> registration =
swm->GetRegistration(mPrincipal, mScope);
if (!registration || registration->mPendingUninstall) {
ErrorResult rv;
rv.ThrowTypeError<MSG_SW_UPDATE_BAD_REGISTRATION>(NS_ConvertUTF8toUTF16(mScope),
NS_LITERAL_STRING("uninstalled"));
FailUpdateJob(rv);
return;
}
// If a Register job with a new script executed ahead of us in the job queue,
// then our update for the old script no longer makes sense. Simply abort
// in this case.
RefPtr<ServiceWorkerInfo> newest = registration->Newest();
if (newest && !mScriptSpec.Equals(newest->ScriptSpec())) {
ErrorResult rv;
rv.ThrowTypeError<MSG_SW_UPDATE_BAD_REGISTRATION>(NS_ConvertUTF8toUTF16(mScope),
NS_LITERAL_STRING("changed"));
FailUpdateJob(rv);
return;
}
SetRegistration(registration);
Update();
}
void
ServiceWorkerUpdateJob::SetRegistration(ServiceWorkerRegistrationInfo* aRegistration)
{
AssertIsOnMainThread();
MOZ_ASSERT(!mRegistration);
MOZ_ASSERT(aRegistration);
mRegistration = aRegistration;
}
void
ServiceWorkerUpdateJob::Update()
{
AssertIsOnMainThread();
MOZ_ASSERT(!Canceled());
// SetRegistration() must be called before Update().
MOZ_ASSERT(mRegistration);
MOZ_ASSERT(!mRegistration->GetInstalling());
// Begin the script download and comparison steps starting at step 5
// of the Update algorithm.
RefPtr<ServiceWorkerInfo> workerInfo = mRegistration->Newest();
nsAutoString cacheName;
// If the script has not changed, we need to perform a byte-for-byte
// comparison.
if (workerInfo && workerInfo->ScriptSpec().Equals(mScriptSpec)) {
cacheName = workerInfo->CacheName();
}
RefPtr<CompareCallback> callback = new CompareCallback(this);
nsresult rv =
serviceWorkerScriptCache::Compare(mRegistration, mPrincipal, cacheName,
NS_ConvertUTF8toUTF16(mScriptSpec),
callback, mLoadGroup);
if (NS_WARN_IF(NS_FAILED(rv))) {
FailUpdateJob(rv);
return;
}
}
void
ServiceWorkerUpdateJob::ComparisonResult(nsresult aStatus,
bool aInCacheAndEqual,
const nsAString& aNewCacheName,
const nsACString& aMaxScope)
{
AssertIsOnMainThread();
if (NS_WARN_IF(Canceled())) {
FailUpdateJob(NS_ERROR_DOM_ABORT_ERR);
return;
}
// Handle failure of the download or comparison. This is part of Update
// step 5 as "If the algorithm asynchronously completes with null, then:".
if (NS_WARN_IF(NS_FAILED(aStatus))) {
FailUpdateJob(aStatus);
return;
}
// The spec validates the response before performing the byte-for-byte check.
// Here we perform the comparison in another module and then validate the
// script URL and scope. Make sure to do this validation before accepting
// an byte-for-byte match since the service-worker-allowed header might have
// changed since the last time it was installed.
// This is step 2 the "validate response" section of Update algorithm step 5.
// Step 1 is performed in the serviceWorkerScriptCache code.
nsCOMPtr<nsIURI> scriptURI;
nsresult rv = NS_NewURI(getter_AddRefs(scriptURI), mScriptSpec);
if (NS_WARN_IF(NS_FAILED(rv))) {
FailUpdateJob(NS_ERROR_DOM_SECURITY_ERR);
return;
}
nsCOMPtr<nsIURI> maxScopeURI;
if (!aMaxScope.IsEmpty()) {
rv = NS_NewURI(getter_AddRefs(maxScopeURI), aMaxScope,
nullptr, scriptURI);
if (NS_WARN_IF(NS_FAILED(rv))) {
FailUpdateJob(NS_ERROR_DOM_SECURITY_ERR);
return;
}
}
nsAutoCString defaultAllowedPrefix;
rv = GetRequiredScopeStringPrefix(scriptURI, defaultAllowedPrefix,
eUseDirectory);
if (NS_WARN_IF(NS_FAILED(rv))) {
FailUpdateJob(NS_ERROR_DOM_SECURITY_ERR);
return;
}
nsAutoCString maxPrefix(defaultAllowedPrefix);
if (maxScopeURI) {
rv = GetRequiredScopeStringPrefix(maxScopeURI, maxPrefix, eUsePath);
if (NS_WARN_IF(NS_FAILED(rv))) {
FailUpdateJob(NS_ERROR_DOM_SECURITY_ERR);
return;
}
}
if (!StringBeginsWith(mRegistration->mScope, maxPrefix)) {
nsXPIDLString message;
NS_ConvertUTF8toUTF16 reportScope(mRegistration->mScope);
NS_ConvertUTF8toUTF16 reportMaxPrefix(maxPrefix);
const char16_t* params[] = { reportScope.get(), reportMaxPrefix.get() };
rv = nsContentUtils::FormatLocalizedString(nsContentUtils::eDOM_PROPERTIES,
"ServiceWorkerScopePathMismatch",
params, message);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to format localized string");
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
swm->ReportToAllClients(mScope,
message,
EmptyString(),
EmptyString(), 0, 0,
nsIScriptError::errorFlag);
FailUpdateJob(NS_ERROR_DOM_SECURITY_ERR);
return;
}
// The response has been validated, so now we can consider if its a
// byte-for-byte match. This is step 6 of the Update algorithm.
if (aInCacheAndEqual) {
Finish(NS_OK);
return;
}
Telemetry::Accumulate(Telemetry::SERVICE_WORKER_UPDATED, 1);
// Begin step 7 of the Update algorithm to evaluate the new script.
RefPtr<ServiceWorkerInfo> sw =
new ServiceWorkerInfo(mRegistration->mPrincipal,
mRegistration->mScope,
mScriptSpec, aNewCacheName);
mRegistration->SetEvaluating(sw);
nsMainThreadPtrHandle<ServiceWorkerUpdateJob> handle(
new nsMainThreadPtrHolder<ServiceWorkerUpdateJob>(this));
RefPtr<LifeCycleEventCallback> callback = new ContinueUpdateRunnable(handle);
ServiceWorkerPrivate* workerPrivate = sw->WorkerPrivate();
MOZ_ASSERT(workerPrivate);
rv = workerPrivate->CheckScriptEvaluation(callback);
if (NS_WARN_IF(NS_FAILED(rv))) {
FailUpdateJob(NS_ERROR_DOM_ABORT_ERR);
return;
}
}
void
ServiceWorkerUpdateJob::ContinueUpdateAfterScriptEval(bool aScriptEvaluationResult)
{
AssertIsOnMainThread();
if (Canceled()) {
FailUpdateJob(NS_ERROR_DOM_ABORT_ERR);
return;
}
// Step 7.5 of the Update algorithm verifying that the script evaluated
// successfully.
if (NS_WARN_IF(!aScriptEvaluationResult)) {
ErrorResult error;
NS_ConvertUTF8toUTF16 scriptSpec(mScriptSpec);
NS_ConvertUTF8toUTF16 scope(mRegistration->mScope);
error.ThrowTypeError<MSG_SW_SCRIPT_THREW>(scriptSpec, scope);
FailUpdateJob(error);
return;
}
Install();
}
void
ServiceWorkerUpdateJob::Install()
{
AssertIsOnMainThread();
MOZ_ASSERT(!Canceled());
MOZ_ASSERT(!mRegistration->GetInstalling());
// Begin step 2 of the Install algorithm.
//
// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#installation-algorithm
mRegistration->TransitionEvaluatingToInstalling();
// Step 6 of the Install algorithm resolving the job promise.
InvokeResultCallbacks(NS_OK);
// The job promise cannot be rejected after this point, but the job can
// still fail; e.g. if the install event handler throws, etc.
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
// fire the updatefound event
nsCOMPtr<nsIRunnable> upr =
NewRunnableMethod<RefPtr<ServiceWorkerRegistrationInfo>>(
swm,
&ServiceWorkerManager::FireUpdateFoundOnServiceWorkerRegistrations,
mRegistration);
NS_DispatchToMainThread(upr);
// Call ContinueAfterInstallEvent(false) on main thread if the SW
// script fails to load.
nsCOMPtr<nsIRunnable> failRunnable = NewRunnableMethod<bool>
(this, &ServiceWorkerUpdateJob::ContinueAfterInstallEvent, false);
nsMainThreadPtrHandle<ServiceWorkerUpdateJob> handle(
new nsMainThreadPtrHolder<ServiceWorkerUpdateJob>(this));
RefPtr<LifeCycleEventCallback> callback = new ContinueInstallRunnable(handle);
// Send the install event to the worker thread
ServiceWorkerPrivate* workerPrivate =
mRegistration->GetInstalling()->WorkerPrivate();
nsresult rv = workerPrivate->SendLifeCycleEvent(NS_LITERAL_STRING("install"),
callback, failRunnable);
if (NS_WARN_IF(NS_FAILED(rv))) {
ContinueAfterInstallEvent(false /* aSuccess */);
}
}
void
ServiceWorkerUpdateJob::ContinueAfterInstallEvent(bool aInstallEventSuccess)
{
if (Canceled()) {
return FailUpdateJob(NS_ERROR_DOM_ABORT_ERR);
}
MOZ_ASSERT(mRegistration->GetInstalling());
// Continue executing the Install algorithm at step 12.
// "If installFailed is true"
if (NS_WARN_IF(!aInstallEventSuccess)) {
// The installing worker is cleaned up by FailUpdateJob().
FailUpdateJob(NS_ERROR_DOM_ABORT_ERR);
return;
}
mRegistration->TransitionInstallingToWaiting();
Finish(NS_OK);
// Step 20 calls for explicitly waiting for queued event tasks to fire. Instead,
// we simply queue a runnable to execute Activate. This ensures the events are
// flushed from the queue before proceeding.
// Step 22 of the Install algorithm. Activate is executed after the completion
// of this job. The controlling client and skipWaiting checks are performed
// in TryToActivate().
mRegistration->TryToActivateAsync();
}
} // namespace workers
} // namespace dom
} // namespace mozilla