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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
#include "CacheLoadHandler.h"
#include "ScriptResponseHeaderProcessor.h" // ScriptResponseHeaderProcessor
#include "WorkerLoadContext.h" // WorkerLoadContext
#include "nsIPrincipal.h"
#include "nsIThreadRetargetableRequest.h"
#include "nsIXPConnect.h"
#include "jsapi.h"
#include "nsNetUtil.h"
#include "mozilla/Assertions.h"
#include "mozilla/Encoding.h"
#include "mozilla/dom/CacheBinding.h"
#include "mozilla/dom/cache/CacheTypes.h"
#include "mozilla/dom/Response.h"
#include "mozilla/dom/ServiceWorkerBinding.h" // ServiceWorkerState
#include "mozilla/Result.h"
#include "mozilla/TaskQueue.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/WorkerScope.h"
#include "mozilla/dom/workerinternals/ScriptLoader.h" // WorkerScriptLoader
namespace mozilla {
namespace dom {
namespace workerinternals::loader {
NS_IMPL_ISUPPORTS0(CacheCreator)
NS_IMPL_ISUPPORTS(CacheLoadHandler, nsIStreamLoaderObserver)
NS_IMPL_ISUPPORTS0(CachePromiseHandler)
CachePromiseHandler::CachePromiseHandler(
WorkerScriptLoader* aLoader, ThreadSafeRequestHandle* aRequestHandle)
: mLoader(aLoader), mRequestHandle(aRequestHandle) {
AssertIsOnMainThread();
MOZ_ASSERT(mLoader);
}
void CachePromiseHandler::ResolvedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue,
ErrorResult& aRv) {
AssertIsOnMainThread();
if (mRequestHandle->IsEmpty()) {
return;
}
WorkerLoadContext* loadContext = mRequestHandle->GetContext();
// May already have been canceled by CacheLoadHandler::Fail from
// CancelMainThread.
MOZ_ASSERT(loadContext->mCacheStatus == WorkerLoadContext::WritingToCache ||
loadContext->mCacheStatus == WorkerLoadContext::Cancel);
MOZ_ASSERT_IF(loadContext->mCacheStatus == WorkerLoadContext::Cancel,
!loadContext->mCachePromise);
if (loadContext->mCachePromise) {
loadContext->mCacheStatus = WorkerLoadContext::Cached;
loadContext->mCachePromise = nullptr;
mRequestHandle->MaybeExecuteFinishedScripts();
}
}
void CachePromiseHandler::RejectedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue,
ErrorResult& aRv) {
AssertIsOnMainThread();
if (mRequestHandle->IsEmpty()) {
return;
}
WorkerLoadContext* loadContext = mRequestHandle->GetContext();
// May already have been canceled by CacheLoadHandler::Fail from
// CancelMainThread.
MOZ_ASSERT(loadContext->mCacheStatus == WorkerLoadContext::WritingToCache ||
loadContext->mCacheStatus == WorkerLoadContext::Cancel);
loadContext->mCacheStatus = WorkerLoadContext::Cancel;
loadContext->mCachePromise = nullptr;
// This will delete the cache object and will call LoadingFinished() with an
// error for each ongoing operation.
auto* cacheCreator = mRequestHandle->GetCacheCreator();
if (cacheCreator) {
cacheCreator->DeleteCache(NS_ERROR_FAILURE);
}
}
CacheCreator::CacheCreator(WorkerPrivate* aWorkerPrivate)
: mCacheName(aWorkerPrivate->ServiceWorkerCacheName()),
mOriginAttributes(aWorkerPrivate->GetOriginAttributes()) {
MOZ_ASSERT(aWorkerPrivate->IsServiceWorker());
}
nsresult CacheCreator::CreateCacheStorage(nsIPrincipal* aPrincipal) {
AssertIsOnMainThread();
MOZ_ASSERT(!mCacheStorage);
MOZ_ASSERT(aPrincipal);
nsIXPConnect* xpc = nsContentUtils::XPConnect();
MOZ_ASSERT(xpc, "This should never be null!");
AutoJSAPI jsapi;
jsapi.Init();
JSContext* cx = jsapi.cx();
JS::Rooted<JSObject*> sandbox(cx);
nsresult rv = xpc->CreateSandbox(cx, aPrincipal, sandbox.address());
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// The JSContext is not in a realm, so CreateSandbox returned an unwrapped
// global.
MOZ_ASSERT(JS_IsGlobalObject(sandbox));
mSandboxGlobalObject = xpc::NativeGlobal(sandbox);
if (NS_WARN_IF(!mSandboxGlobalObject)) {
return NS_ERROR_FAILURE;
}
// If we're in private browsing mode, don't even try to create the
// CacheStorage. Instead, just fail immediately to terminate the
// ServiceWorker load.
if (NS_WARN_IF(mOriginAttributes.IsPrivateBrowsing())) {
return NS_ERROR_DOM_SECURITY_ERR;
}
// Create a CacheStorage bypassing its trusted origin checks. The
// ServiceWorker has already performed its own checks before getting
// to this point.
ErrorResult error;
mCacheStorage = CacheStorage::CreateOnMainThread(
mozilla::dom::cache::CHROME_ONLY_NAMESPACE, mSandboxGlobalObject,
aPrincipal, true /* force trusted origin */, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
return NS_OK;
}
nsresult CacheCreator::Load(nsIPrincipal* aPrincipal) {
AssertIsOnMainThread();
MOZ_ASSERT(!mLoaders.IsEmpty());
nsresult rv = CreateCacheStorage(aPrincipal);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
ErrorResult error;
MOZ_ASSERT(!mCacheName.IsEmpty());
RefPtr<Promise> promise = mCacheStorage->Open(mCacheName, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
promise->AppendNativeHandler(this);
return NS_OK;
}
void CacheCreator::FailLoaders(nsresult aRv) {
AssertIsOnMainThread();
// Fail() can call LoadingFinished() which may call ExecuteFinishedScripts()
// which sets mCacheCreator to null, so hold a ref.
RefPtr<CacheCreator> kungfuDeathGrip = this;
for (uint32_t i = 0, len = mLoaders.Length(); i < len; ++i) {
mLoaders[i]->Fail(aRv);
}
mLoaders.Clear();
}
void CacheCreator::RejectedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue,
ErrorResult& aRv) {
AssertIsOnMainThread();
FailLoaders(NS_ERROR_FAILURE);
}
void CacheCreator::ResolvedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue,
ErrorResult& aRv) {
AssertIsOnMainThread();
if (!aValue.isObject()) {
FailLoaders(NS_ERROR_FAILURE);
return;
}
JS::Rooted<JSObject*> obj(aCx, &aValue.toObject());
Cache* cache = nullptr;
nsresult rv = UNWRAP_OBJECT(Cache, &obj, cache);
if (NS_WARN_IF(NS_FAILED(rv))) {
FailLoaders(NS_ERROR_FAILURE);
return;
}
mCache = cache;
MOZ_DIAGNOSTIC_ASSERT(mCache);
// If the worker is canceled, CancelMainThread() will have cleared the
// loaders via DeleteCache().
for (uint32_t i = 0, len = mLoaders.Length(); i < len; ++i) {
mLoaders[i]->Load(cache);
}
}
void CacheCreator::DeleteCache(nsresult aReason) {
AssertIsOnMainThread();
// This is called when the load is canceled which can occur before
// mCacheStorage is initialized.
if (mCacheStorage) {
// It's safe to do this while Cache::Match() and Cache::Put() calls are
// running.
RefPtr<Promise> promise = mCacheStorage->Delete(mCacheName, IgnoreErrors());
// We don't care to know the result of the promise object.
}
// Always call this here to ensure the loaders array is cleared.
FailLoaders(NS_ERROR_FAILURE);
}
CacheLoadHandler::CacheLoadHandler(ThreadSafeWorkerRef* aWorkerRef,
ThreadSafeRequestHandle* aRequestHandle,
bool aIsWorkerScript,
bool aOnlyExistingCachedResourcesAllowed,
WorkerScriptLoader* aLoader)
: mRequestHandle(aRequestHandle),
mLoader(aLoader),
mWorkerRef(aWorkerRef),
mIsWorkerScript(aIsWorkerScript),
mFailed(false),
mOnlyExistingCachedResourcesAllowed(aOnlyExistingCachedResourcesAllowed) {
MOZ_ASSERT(aWorkerRef);
MOZ_ASSERT(aWorkerRef->Private()->IsServiceWorker());
mMainThreadEventTarget = aWorkerRef->Private()->MainThreadEventTarget();
MOZ_ASSERT(mMainThreadEventTarget);
mBaseURI = mLoader->GetBaseURI();
AssertIsOnMainThread();
// Worker scripts are always decoded as UTF-8 per spec.
mDecoder = MakeUnique<ScriptDecoder>(UTF_8_ENCODING,
ScriptDecoder::BOMHandling::Remove);
}
void CacheLoadHandler::Fail(nsresult aRv) {
AssertIsOnMainThread();
MOZ_ASSERT(NS_FAILED(aRv));
if (mFailed) {
return;
}
mFailed = true;
if (mPump) {
MOZ_ASSERT_IF(!mRequestHandle->IsEmpty(),
mRequestHandle->GetContext()->mCacheStatus ==
WorkerLoadContext::ReadingFromCache);
mPump->Cancel(aRv);
mPump = nullptr;
}
if (mRequestHandle->IsEmpty()) {
return;
}
WorkerLoadContext* loadContext = mRequestHandle->GetContext();
loadContext->mCacheStatus = WorkerLoadContext::Cancel;
if (loadContext->mCachePromise) {
loadContext->mCachePromise->MaybeReject(aRv);
}
loadContext->mCachePromise = nullptr;
mRequestHandle->LoadingFinished(aRv);
}
void CacheLoadHandler::Load(Cache* aCache) {
AssertIsOnMainThread();
MOZ_ASSERT(aCache);
MOZ_ASSERT(!mRequestHandle->IsEmpty());
WorkerLoadContext* loadContext = mRequestHandle->GetContext();
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), loadContext->mRequest->mURL,
nullptr, mBaseURI);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
MOZ_ASSERT(loadContext->mFullURL.IsEmpty());
rv = uri->GetSpec(loadContext->mFullURL);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
mozilla::dom::RequestOrUTF8String request;
request.SetAsUTF8String().ShareOrDependUpon(loadContext->mFullURL);
mozilla::dom::CacheQueryOptions params;
// This JSContext will not end up executing JS code because here there are
// no ReadableStreams involved.
AutoJSAPI jsapi;
jsapi.Init();
ErrorResult error;
RefPtr<Promise> promise = aCache->Match(jsapi.cx(), request, params, error);
if (NS_WARN_IF(error.Failed())) {
Fail(error.StealNSResult());
return;
}
promise->AppendNativeHandler(this);
}
void CacheLoadHandler::RejectedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue,
ErrorResult& aRv) {
AssertIsOnMainThread();
MOZ_ASSERT(!mRequestHandle->IsEmpty());
MOZ_ASSERT(mRequestHandle->GetContext()->mCacheStatus ==
WorkerLoadContext::Uncached);
Fail(NS_ERROR_FAILURE);
}
void CacheLoadHandler::ResolvedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue,
ErrorResult& aRv) {
AssertIsOnMainThread();
MOZ_ASSERT(!mRequestHandle->IsEmpty());
WorkerLoadContext* loadContext = mRequestHandle->GetContext();
// If we have already called 'Fail', we should not proceed. If we cancelled,
// we should similarily not proceed.
if (mFailed) {
return;
}
MOZ_ASSERT(loadContext->mCacheStatus == WorkerLoadContext::Uncached);
nsresult rv;
// The ServiceWorkerScriptCache will store data for any scripts it
// it knows about. This is always at least the top level script.
// Depending on if a previous version of the service worker has
// been installed or not it may also know about importScripts(). We
// must handle loading and offlining new importScripts() here, however.
if (aValue.isUndefined()) {
// If this is the main script or we're not loading a new service worker
// then this is an error. This can happen for internal reasons, like
// storage was probably wiped without removing the service worker
// registration. It can also happen for exposed reasons like the
// service worker script calling importScripts() after install.
if (NS_WARN_IF(mIsWorkerScript || mOnlyExistingCachedResourcesAllowed)) {
Fail(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
loadContext->mCacheStatus = WorkerLoadContext::ToBeCached;
rv = mLoader->LoadScript(mRequestHandle);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
}
return;
}
MOZ_ASSERT(aValue.isObject());
JS::Rooted<JSObject*> obj(aCx, &aValue.toObject());
mozilla::dom::Response* response = nullptr;
rv = UNWRAP_OBJECT(Response, &obj, response);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
InternalHeaders* headers = response->GetInternalHeaders();
headers->Get("content-security-policy"_ns, mCSPHeaderValue, IgnoreErrors());
headers->Get("content-security-policy-report-only"_ns,
mCSPReportOnlyHeaderValue, IgnoreErrors());
headers->Get("referrer-policy"_ns, mReferrerPolicyHeaderValue,
IgnoreErrors());
nsAutoCString coepHeader;
headers->Get("cross-origin-embedder-policy"_ns, coepHeader, IgnoreErrors());
nsILoadInfo::CrossOriginEmbedderPolicy coep =
NS_GetCrossOriginEmbedderPolicyFromHeader(
coepHeader, mWorkerRef->Private()->Trials().IsEnabled(
OriginTrial::CoepCredentialless));
rv = ScriptResponseHeaderProcessor::ProcessCrossOriginEmbedderPolicyHeader(
mWorkerRef->Private(), coep, loadContext->IsTopLevel());
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
nsCOMPtr<nsIInputStream> inputStream;
response->GetBody(getter_AddRefs(inputStream));
mChannelInfo = response->GetChannelInfo();
const UniquePtr<PrincipalInfo>& pInfo = response->GetPrincipalInfo();
if (pInfo) {
mPrincipalInfo = mozilla::MakeUnique<PrincipalInfo>(*pInfo);
}
if (!inputStream) {
loadContext->mCacheStatus = WorkerLoadContext::Cached;
if (mRequestHandle->IsCancelled()) {
auto* cacheCreator = mRequestHandle->GetCacheCreator();
if (cacheCreator) {
cacheCreator->DeleteCache(mRequestHandle->GetCancelResult());
}
return;
}
nsresult rv = DataReceivedFromCache(
(uint8_t*)"", 0, mChannelInfo, std::move(mPrincipalInfo),
mCSPHeaderValue, mCSPReportOnlyHeaderValue, mReferrerPolicyHeaderValue);
mRequestHandle->OnStreamComplete(rv);
return;
}
MOZ_ASSERT(!mPump);
rv = NS_NewInputStreamPump(getter_AddRefs(mPump), inputStream.forget(),
0, /* default segsize */
0, /* default segcount */
false, /* default closeWhenDone */
mMainThreadEventTarget);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
nsCOMPtr<nsIStreamLoader> loader;
rv = NS_NewStreamLoader(getter_AddRefs(loader), this);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
rv = mPump->AsyncRead(loader);
if (NS_WARN_IF(NS_FAILED(rv))) {
mPump = nullptr;
Fail(rv);
return;
}
nsCOMPtr<nsIThreadRetargetableRequest> rr = do_QueryInterface(mPump);
if (rr) {
nsCOMPtr<nsIEventTarget> sts =
do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
RefPtr<TaskQueue> queue =
TaskQueue::Create(sts.forget(), "CacheLoadHandler STS Delivery Queue");
rv = rr->RetargetDeliveryTo(queue);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to dispatch the nsIInputStreamPump to a IO thread.");
}
}
loadContext->mCacheStatus = WorkerLoadContext::ReadingFromCache;
}
NS_IMETHODIMP
CacheLoadHandler::OnStreamComplete(nsIStreamLoader* aLoader,
nsISupports* aContext, nsresult aStatus,
uint32_t aStringLen,
const uint8_t* aString) {
AssertIsOnMainThread();
if (mRequestHandle->IsEmpty()) {
return NS_OK;
}
WorkerLoadContext* loadContext = mRequestHandle->GetContext();
mPump = nullptr;
if (NS_FAILED(aStatus)) {
MOZ_ASSERT(loadContext->mCacheStatus ==
WorkerLoadContext::ReadingFromCache ||
loadContext->mCacheStatus == WorkerLoadContext::Cancel);
Fail(aStatus);
return NS_OK;
}
MOZ_ASSERT(loadContext->mCacheStatus == WorkerLoadContext::ReadingFromCache);
loadContext->mCacheStatus = WorkerLoadContext::Cached;
MOZ_ASSERT(mPrincipalInfo);
nsresult rv = DataReceivedFromCache(
aString, aStringLen, mChannelInfo, std::move(mPrincipalInfo),
mCSPHeaderValue, mCSPReportOnlyHeaderValue, mReferrerPolicyHeaderValue);
return mRequestHandle->OnStreamComplete(rv);
}
nsresult CacheLoadHandler::DataReceivedFromCache(
const uint8_t* aString, uint32_t aStringLen,
const mozilla::dom::ChannelInfo& aChannelInfo,
UniquePtr<PrincipalInfo> aPrincipalInfo, const nsACString& aCSPHeaderValue,
const nsACString& aCSPReportOnlyHeaderValue,
const nsACString& aReferrerPolicyHeaderValue) {
AssertIsOnMainThread();
if (mRequestHandle->IsEmpty()) {
return NS_OK;
}
WorkerLoadContext* loadContext = mRequestHandle->GetContext();
MOZ_ASSERT(loadContext->mCacheStatus == WorkerLoadContext::Cached);
MOZ_ASSERT(loadContext->mRequest);
auto responsePrincipalOrErr = PrincipalInfoToPrincipal(*aPrincipalInfo);
MOZ_DIAGNOSTIC_ASSERT(responsePrincipalOrErr.isOk());
nsIPrincipal* principal = mWorkerRef->Private()->GetPrincipal();
if (!principal) {
WorkerPrivate* parentWorker = mWorkerRef->Private()->GetParent();
MOZ_ASSERT(parentWorker, "Must have a parent!");
principal = parentWorker->GetPrincipal();
}
nsCOMPtr<nsIPrincipal> responsePrincipal = responsePrincipalOrErr.unwrap();
loadContext->mMutedErrorFlag.emplace(!principal->Subsumes(responsePrincipal));
// May be null.
Document* parentDoc = mWorkerRef->Private()->GetDocument();
// Use the regular ScriptDecoder Decoder for this grunt work! Should be just
// fine because we're running on the main thread.
nsresult rv;
// Set the Source type to "text" for decoding.
loadContext->mRequest->SetTextSource(loadContext);
rv = mDecoder->DecodeRawData(loadContext->mRequest, aString, aStringLen,
/* aEndOfStream = */ true);
NS_ENSURE_SUCCESS(rv, rv);
if (!loadContext->mRequest->ScriptTextLength()) {
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, "DOM"_ns,
parentDoc, nsContentUtils::eDOM_PROPERTIES,
"EmptyWorkerSourceWarning");
}
nsCOMPtr<nsIURI> finalURI;
rv = NS_NewURI(getter_AddRefs(finalURI), loadContext->mFullURL);
if (!loadContext->mRequest->mBaseURL) {
loadContext->mRequest->mBaseURL = finalURI;
}
if (loadContext->IsTopLevel()) {
if (NS_SUCCEEDED(rv)) {
mWorkerRef->Private()->SetBaseURI(finalURI);
}
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
nsIPrincipal* principal = mWorkerRef->Private()->GetPrincipal();
MOZ_DIAGNOSTIC_ASSERT(principal);
bool equal = false;
MOZ_ALWAYS_SUCCEEDS(responsePrincipal->Equals(principal, &equal));
MOZ_DIAGNOSTIC_ASSERT(equal);
nsCOMPtr<nsIContentSecurityPolicy> csp;
if (parentDoc) {
csp = parentDoc->GetCsp();
}
MOZ_DIAGNOSTIC_ASSERT(!csp);
#endif
mWorkerRef->Private()->InitChannelInfo(aChannelInfo);
nsILoadGroup* loadGroup = mWorkerRef->Private()->GetLoadGroup();
MOZ_DIAGNOSTIC_ASSERT(loadGroup);
// Override the principal on the WorkerPrivate. This is only necessary
// in order to get a principal with exactly the correct URL. The fetch
// referrer logic depends on the WorkerPrivate principal having a URL
// this can be removed.
// XXX: force the partitionedPrincipal to be equal to the response one.
// This is OK for now because we don't want to expose partitionedPrincipal
// functionality in ServiceWorkers yet.
rv = mWorkerRef->Private()->SetPrincipalsAndCSPOnMainThread(
responsePrincipal, responsePrincipal, loadGroup, nullptr);
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
rv = mWorkerRef->Private()->SetCSPFromHeaderValues(
aCSPHeaderValue, aCSPReportOnlyHeaderValue);
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
mWorkerRef->Private()->UpdateReferrerInfoFromHeader(
aReferrerPolicyHeaderValue);
}
if (NS_SUCCEEDED(rv)) {
DataReceived();
}
return rv;
}
void CacheLoadHandler::DataReceived() {
MOZ_ASSERT(!mRequestHandle->IsEmpty());
WorkerLoadContext* loadContext = mRequestHandle->GetContext();
if (loadContext->IsTopLevel()) {
WorkerPrivate* parent = mWorkerRef->Private()->GetParent();
if (parent) {
// XHR Params Allowed
mWorkerRef->Private()->SetXHRParamsAllowed(parent->XHRParamsAllowed());
// Set Eval and ContentSecurityPolicy
mWorkerRef->Private()->SetCsp(parent->GetCsp());
mWorkerRef->Private()->SetEvalAllowed(parent->IsEvalAllowed());
mWorkerRef->Private()->SetWasmEvalAllowed(parent->IsWasmEvalAllowed());
}
}
}
} // namespace workerinternals::loader
} // namespace dom
} // namespace mozilla