gecko-dev/dom/cache/CacheStorage.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 "mozilla/dom/cache/CacheStorage.h"
#include "mozilla/unused.h"
#include "mozilla/dom/CacheStorageBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/Response.h"
#include "mozilla/dom/cache/AutoUtils.h"
#include "mozilla/dom/cache/Cache.h"
#include "mozilla/dom/cache/CacheChild.h"
#include "mozilla/dom/cache/CacheStorageChild.h"
#include "mozilla/dom/cache/Feature.h"
#include "mozilla/dom/cache/PCacheChild.h"
#include "mozilla/dom/cache/ReadStream.h"
#include "mozilla/dom/cache/TypeUtils.h"
#include "mozilla/ipc/BackgroundChild.h"
#include "mozilla/ipc/BackgroundUtils.h"
#include "mozilla/ipc/PBackgroundChild.h"
#include "mozilla/ipc/PBackgroundSharedTypes.h"
#include "nsContentUtils.h"
#include "nsIDocument.h"
#include "nsIGlobalObject.h"
#include "nsIScriptSecurityManager.h"
#include "nsURLParsers.h"
#include "WorkerPrivate.h"
namespace mozilla {
namespace dom {
namespace cache {
using mozilla::Unused;
using mozilla::ErrorResult;
using mozilla::dom::workers::WorkerPrivate;
using mozilla::ipc::BackgroundChild;
using mozilla::ipc::PBackgroundChild;
using mozilla::ipc::IProtocol;
using mozilla::ipc::PrincipalInfo;
using mozilla::ipc::PrincipalToPrincipalInfo;
NS_IMPL_CYCLE_COLLECTING_ADDREF(mozilla::dom::cache::CacheStorage);
NS_IMPL_CYCLE_COLLECTING_RELEASE(mozilla::dom::cache::CacheStorage);
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(mozilla::dom::cache::CacheStorage,
mGlobal);
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CacheStorage)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIIPCBackgroundChildCreateCallback)
NS_INTERFACE_MAP_END
// We cannot reference IPC types in a webidl binding implementation header. So
// define this in the .cpp and use heap storage in the mPendingRequests list.
struct CacheStorage::Entry final
{
RefPtr<Promise> mPromise;
CacheOpArgs mArgs;
// We cannot add the requests until after the actor is present. So store
// the request data separately for now.
RefPtr<InternalRequest> mRequest;
};
namespace {
bool
IsTrusted(const PrincipalInfo& aPrincipalInfo, bool aTestingPrefEnabled)
{
// Can happen on main thread or worker thread
if (aPrincipalInfo.type() == PrincipalInfo::TSystemPrincipalInfo) {
return true;
}
// Require a ContentPrincipal to avoid null principal, etc.
//
// Also, an unknown appId means that this principal was created for the
// codebase without all the security information from the end document or
// worker. We require exact knowledge of this information before allowing
// the caller to touch the disk using the Cache API.
if (NS_WARN_IF(aPrincipalInfo.type() != PrincipalInfo::TContentPrincipalInfo ||
aPrincipalInfo.get_ContentPrincipalInfo().attrs().mAppId ==
nsIScriptSecurityManager::UNKNOWN_APP_ID)) {
return false;
}
// If we're in testing mode, then don't do any more work to determing if
// the origin is trusted. We have to run some tests as http.
if (aTestingPrefEnabled) {
return true;
}
// Now parse the scheme of the principal's origin. This is a short term
// method for determining "trust". In the long term we need to implement
// the full algorithm here:
//
// https://w3c.github.io/webappsec/specs/powerfulfeatures/#settings-secure
//
// TODO: Implement full secure setting algorithm. (bug 1177856)
const nsCString& flatURL = aPrincipalInfo.get_ContentPrincipalInfo().spec();
const char* url = flatURL.get();
// off the main thread URL parsing using nsStdURLParser.
nsCOMPtr<nsIURLParser> urlParser = new nsStdURLParser();
uint32_t schemePos;
int32_t schemeLen;
uint32_t authPos;
int32_t authLen;
nsresult rv = urlParser->ParseURL(url, flatURL.Length(),
&schemePos, &schemeLen,
&authPos, &authLen,
nullptr, nullptr); // ignore path
if (NS_WARN_IF(NS_FAILED(rv))) { return false; }
nsAutoCString scheme(Substring(flatURL, schemePos, schemeLen));
if (scheme.LowerCaseEqualsLiteral("https") ||
scheme.LowerCaseEqualsLiteral("app") ||
scheme.LowerCaseEqualsLiteral("file")) {
return true;
}
uint32_t hostPos;
int32_t hostLen;
rv = urlParser->ParseAuthority(url + authPos, authLen,
nullptr, nullptr, // ignore username
nullptr, nullptr, // ignore password
&hostPos, &hostLen,
nullptr); // ignore port
if (NS_WARN_IF(NS_FAILED(rv))) { return false; }
nsDependentCSubstring hostname(url + authPos + hostPos, hostLen);
return hostname.EqualsLiteral("localhost") ||
hostname.EqualsLiteral("127.0.0.1") ||
hostname.EqualsLiteral("::1");
}
} // namespace
// static
already_AddRefed<CacheStorage>
CacheStorage::CreateOnMainThread(Namespace aNamespace, nsIGlobalObject* aGlobal,
nsIPrincipal* aPrincipal, bool aStorageDisabled,
bool aForceTrustedOrigin, ErrorResult& aRv)
{
MOZ_ASSERT(aGlobal);
MOZ_ASSERT(aPrincipal);
MOZ_ASSERT(NS_IsMainThread());
if (aStorageDisabled) {
NS_WARNING("CacheStorage has been disabled.");
RefPtr<CacheStorage> ref = new CacheStorage(NS_ERROR_DOM_SECURITY_ERR);
return ref.forget();
}
PrincipalInfo principalInfo;
nsresult rv = PrincipalToPrincipalInfo(aPrincipal, &principalInfo);
if (NS_WARN_IF(NS_FAILED(rv))) {
aRv.Throw(rv);
return nullptr;
}
bool testingEnabled = aForceTrustedOrigin ||
Preferences::GetBool("dom.caches.testing.enabled", false) ||
Preferences::GetBool("dom.serviceWorkers.testing.enabled", false);
if (!IsTrusted(principalInfo, testingEnabled)) {
NS_WARNING("CacheStorage not supported on untrusted origins.");
RefPtr<CacheStorage> ref = new CacheStorage(NS_ERROR_DOM_SECURITY_ERR);
return ref.forget();
}
RefPtr<CacheStorage> ref = new CacheStorage(aNamespace, aGlobal,
principalInfo, nullptr);
return ref.forget();
}
// static
already_AddRefed<CacheStorage>
CacheStorage::CreateOnWorker(Namespace aNamespace, nsIGlobalObject* aGlobal,
WorkerPrivate* aWorkerPrivate, ErrorResult& aRv)
{
MOZ_ASSERT(aGlobal);
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
if (!aWorkerPrivate->IsStorageAllowed()) {
NS_WARNING("CacheStorage is not allowed.");
RefPtr<CacheStorage> ref = new CacheStorage(NS_ERROR_DOM_SECURITY_ERR);
return ref.forget();
}
if (aWorkerPrivate->IsInPrivateBrowsing()) {
NS_WARNING("CacheStorage not supported during private browsing.");
RefPtr<CacheStorage> ref = new CacheStorage(NS_ERROR_DOM_SECURITY_ERR);
return ref.forget();
}
RefPtr<Feature> feature = Feature::Create(aWorkerPrivate);
if (!feature) {
NS_WARNING("Worker thread is shutting down.");
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
const PrincipalInfo& principalInfo = aWorkerPrivate->GetPrincipalInfo();
// We have a number of cases where we want to skip the https scheme
// validation:
//
// 1) Any worker when dom.caches.testing.enabled pref is true.
// 2) Any worker when dom.serviceWorkers.testing.enabled pref is true. This
// is mainly because most sites using SWs will expect Cache to work if
// SWs are enabled.
// 3) If the window that created this worker has the devtools SW testing
// option enabled. Same reasoning as (2).
// 4) If the worker itself is a ServiceWorker, then we always skip the
// origin checks. The ServiceWorker has its own trusted origin checks
// that are better than ours. In addition, we don't have information
// about the window any more, so we can't do our own checks.
bool testingEnabled = aWorkerPrivate->DOMCachesTestingEnabled() ||
aWorkerPrivate->ServiceWorkersTestingEnabled() ||
aWorkerPrivate->ServiceWorkersTestingInWindow() ||
aWorkerPrivate->IsServiceWorker();
if (!IsTrusted(principalInfo, testingEnabled)) {
NS_WARNING("CacheStorage not supported on untrusted origins.");
RefPtr<CacheStorage> ref = new CacheStorage(NS_ERROR_DOM_SECURITY_ERR);
return ref.forget();
}
RefPtr<CacheStorage> ref = new CacheStorage(aNamespace, aGlobal,
principalInfo, feature);
return ref.forget();
}
// static
bool
CacheStorage::DefineCaches(JSContext* aCx, JS::Handle<JSObject*> aGlobal)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(js::GetObjectClass(aGlobal)->flags & JSCLASS_DOM_GLOBAL,
"Passed object is not a global object!");
if (NS_WARN_IF(!CacheStorageBinding::GetConstructorObject(aCx, aGlobal) ||
!CacheBinding::GetConstructorObject(aCx, aGlobal))) {
return false;
}
nsIPrincipal* principal = nsContentUtils::ObjectPrincipal(aGlobal);
MOZ_ASSERT(principal);
ErrorResult rv;
RefPtr<CacheStorage> storage =
CreateOnMainThread(DEFAULT_NAMESPACE, xpc::NativeGlobal(aGlobal), principal,
false, /* private browsing */
true, /* force trusted */
rv);
if (NS_WARN_IF(rv.MaybeSetPendingException(aCx))) {
return false;
}
JS::Rooted<JS::Value> caches(aCx);
js::AssertSameCompartment(aCx, aGlobal);
if (NS_WARN_IF(!ToJSValue(aCx, storage, &caches))) {
return false;
}
return JS_DefineProperty(aCx, aGlobal, "caches", caches, JSPROP_ENUMERATE);
}
CacheStorage::CacheStorage(Namespace aNamespace, nsIGlobalObject* aGlobal,
const PrincipalInfo& aPrincipalInfo, Feature* aFeature)
: mNamespace(aNamespace)
, mGlobal(aGlobal)
, mPrincipalInfo(MakeUnique<PrincipalInfo>(aPrincipalInfo))
, mFeature(aFeature)
, mActor(nullptr)
, mStatus(NS_OK)
{
MOZ_ASSERT(mGlobal);
// If the PBackground actor is already initialized then we can
// immediately use it
PBackgroundChild* actor = BackgroundChild::GetForCurrentThread();
if (actor) {
ActorCreated(actor);
return;
}
// Otherwise we must begin the PBackground initialization process and
// wait for the async ActorCreated() callback.
MOZ_ASSERT(NS_IsMainThread());
bool ok = BackgroundChild::GetOrCreateForCurrentThread(this);
if (NS_WARN_IF(!ok)) {
ActorFailed();
}
}
CacheStorage::CacheStorage(nsresult aFailureResult)
: mNamespace(INVALID_NAMESPACE)
, mActor(nullptr)
, mStatus(aFailureResult)
{
MOZ_ASSERT(NS_FAILED(mStatus));
}
already_AddRefed<Promise>
CacheStorage::Match(const RequestOrUSVString& aRequest,
const CacheQueryOptions& aOptions, ErrorResult& aRv)
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
if (NS_WARN_IF(NS_FAILED(mStatus))) {
aRv.Throw(mStatus);
return nullptr;
}
RefPtr<InternalRequest> request = ToInternalRequest(aRequest, IgnoreBody,
aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(mGlobal, aRv);
if (NS_WARN_IF(!promise)) {
return nullptr;
}
CacheQueryParams params;
ToCacheQueryParams(params, aOptions);
nsAutoPtr<Entry> entry(new Entry());
entry->mPromise = promise;
entry->mArgs = StorageMatchArgs(CacheRequest(), params);
entry->mRequest = request;
mPendingRequests.AppendElement(entry.forget());
MaybeRunPendingRequests();
return promise.forget();
}
already_AddRefed<Promise>
CacheStorage::Has(const nsAString& aKey, ErrorResult& aRv)
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
if (NS_WARN_IF(NS_FAILED(mStatus))) {
aRv.Throw(mStatus);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(mGlobal, aRv);
if (NS_WARN_IF(!promise)) {
return nullptr;
}
nsAutoPtr<Entry> entry(new Entry());
entry->mPromise = promise;
entry->mArgs = StorageHasArgs(nsString(aKey));
mPendingRequests.AppendElement(entry.forget());
MaybeRunPendingRequests();
return promise.forget();
}
already_AddRefed<Promise>
CacheStorage::Open(const nsAString& aKey, ErrorResult& aRv)
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
if (NS_WARN_IF(NS_FAILED(mStatus))) {
aRv.Throw(mStatus);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(mGlobal, aRv);
if (NS_WARN_IF(!promise)) {
return nullptr;
}
nsAutoPtr<Entry> entry(new Entry());
entry->mPromise = promise;
entry->mArgs = StorageOpenArgs(nsString(aKey));
mPendingRequests.AppendElement(entry.forget());
MaybeRunPendingRequests();
return promise.forget();
}
already_AddRefed<Promise>
CacheStorage::Delete(const nsAString& aKey, ErrorResult& aRv)
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
if (NS_WARN_IF(NS_FAILED(mStatus))) {
aRv.Throw(mStatus);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(mGlobal, aRv);
if (NS_WARN_IF(!promise)) {
return nullptr;
}
nsAutoPtr<Entry> entry(new Entry());
entry->mPromise = promise;
entry->mArgs = StorageDeleteArgs(nsString(aKey));
mPendingRequests.AppendElement(entry.forget());
MaybeRunPendingRequests();
return promise.forget();
}
already_AddRefed<Promise>
CacheStorage::Keys(ErrorResult& aRv)
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
if (NS_WARN_IF(NS_FAILED(mStatus))) {
aRv.Throw(mStatus);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(mGlobal, aRv);
if (NS_WARN_IF(!promise)) {
return nullptr;
}
nsAutoPtr<Entry> entry(new Entry());
entry->mPromise = promise;
entry->mArgs = StorageKeysArgs();
mPendingRequests.AppendElement(entry.forget());
MaybeRunPendingRequests();
return promise.forget();
}
// static
bool
CacheStorage::PrefEnabled(JSContext* aCx, JSObject* aObj)
{
return Cache::PrefEnabled(aCx, aObj);
}
// static
already_AddRefed<CacheStorage>
CacheStorage::Constructor(const GlobalObject& aGlobal,
CacheStorageNamespace aNamespace,
nsIPrincipal* aPrincipal, ErrorResult& aRv)
{
if (NS_WARN_IF(!NS_IsMainThread())) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
// TODO: remove Namespace in favor of CacheStorageNamespace
static_assert(DEFAULT_NAMESPACE == (uint32_t)CacheStorageNamespace::Content,
"Default namespace should match webidl Content enum");
static_assert(CHROME_ONLY_NAMESPACE == (uint32_t)CacheStorageNamespace::Chrome,
"Chrome namespace should match webidl Chrome enum");
static_assert(NUMBER_OF_NAMESPACES == (uint32_t)CacheStorageNamespace::EndGuard_,
"Number of namespace should match webidl endguard enum");
Namespace ns = static_cast<Namespace>(aNamespace);
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
bool privateBrowsing = false;
if (nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(global)) {
nsCOMPtr<nsIDocument> doc = window->GetExtantDoc();
if (doc) {
nsCOMPtr<nsILoadContext> loadContext = doc->GetLoadContext();
privateBrowsing = loadContext && loadContext->UsePrivateBrowsing();
}
}
// Create a CacheStorage object bypassing the trusted origin checks
// since this is a chrome-only constructor.
return CreateOnMainThread(ns, global, aPrincipal, privateBrowsing,
true /* force trusted origin */, aRv);
}
nsISupports*
CacheStorage::GetParentObject() const
{
return mGlobal;
}
JSObject*
CacheStorage::WrapObject(JSContext* aContext, JS::Handle<JSObject*> aGivenProto)
{
return mozilla::dom::CacheStorageBinding::Wrap(aContext, this, aGivenProto);
}
void
CacheStorage::ActorCreated(PBackgroundChild* aActor)
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
MOZ_ASSERT(aActor);
if (NS_WARN_IF(mFeature && mFeature->Notified())) {
ActorFailed();
return;
}
// Feature ownership is passed to the CacheStorageChild actor and any actors
// it may create. The Feature will keep the worker thread alive until the
// actors can gracefully shutdown.
CacheStorageChild* newActor = new CacheStorageChild(this, mFeature);
PCacheStorageChild* constructedActor =
aActor->SendPCacheStorageConstructor(newActor, mNamespace, *mPrincipalInfo);
if (NS_WARN_IF(!constructedActor)) {
ActorFailed();
return;
}
mFeature = nullptr;
MOZ_ASSERT(constructedActor == newActor);
mActor = newActor;
MaybeRunPendingRequests();
MOZ_ASSERT(mPendingRequests.IsEmpty());
}
void
CacheStorage::ActorFailed()
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
MOZ_ASSERT(!NS_FAILED(mStatus));
mStatus = NS_ERROR_UNEXPECTED;
mFeature = nullptr;
for (uint32_t i = 0; i < mPendingRequests.Length(); ++i) {
nsAutoPtr<Entry> entry(mPendingRequests[i].forget());
entry->mPromise->MaybeReject(NS_ERROR_UNEXPECTED);
}
mPendingRequests.Clear();
}
void
CacheStorage::DestroyInternal(CacheStorageChild* aActor)
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
MOZ_ASSERT(mActor);
MOZ_ASSERT(mActor == aActor);
mActor->ClearListener();
mActor = nullptr;
// Note that we will never get an actor again in case another request is
// made before this object is destructed.
ActorFailed();
}
nsIGlobalObject*
CacheStorage::GetGlobalObject() const
{
return mGlobal;
}
#ifdef DEBUG
void
CacheStorage::AssertOwningThread() const
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
}
#endif
CachePushStreamChild*
CacheStorage::CreatePushStream(nsIAsyncInputStream* aStream)
{
// This is true because CacheStorage always uses IgnoreBody for requests.
MOZ_CRASH("CacheStorage should never create a push stream.");
}
CacheStorage::~CacheStorage()
{
NS_ASSERT_OWNINGTHREAD(CacheStorage);
if (mActor) {
mActor->StartDestroyFromListener();
// DestroyInternal() is called synchronously by StartDestroyFromListener().
// So we should have already cleared the mActor.
MOZ_ASSERT(!mActor);
}
}
void
CacheStorage::MaybeRunPendingRequests()
{
if (!mActor) {
return;
}
for (uint32_t i = 0; i < mPendingRequests.Length(); ++i) {
ErrorResult rv;
nsAutoPtr<Entry> entry(mPendingRequests[i].forget());
AutoChildOpArgs args(this, entry->mArgs);
if (entry->mRequest) {
args.Add(entry->mRequest, IgnoreBody, IgnoreInvalidScheme, rv);
}
if (NS_WARN_IF(rv.Failed())) {
entry->mPromise->MaybeReject(rv);
continue;
}
mActor->ExecuteOp(mGlobal, entry->mPromise, this, args.SendAsOpArgs());
}
mPendingRequests.Clear();
}
} // namespace cache
} // namespace dom
} // namespace mozilla