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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/storage/dom_window_storage.h"
#include "base/feature_list.h"
#include "base/memory/scoped_refptr.h"
#include "services/network/public/mojom/web_sandbox_flags.mojom-blink.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/local_frame_client.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/modules/storage/storage_area.h"
#include "third_party/blink/renderer/modules/storage/storage_controller.h"
#include "third_party/blink/renderer/modules/storage/storage_namespace.h"
#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
#include "third_party/blink/renderer/platform/weborigin/security_origin.h"
namespace blink {
DOMWindowStorage::DOMWindowStorage(LocalDOMWindow& window)
: Supplement<LocalDOMWindow>(window) {}
void DOMWindowStorage::Trace(Visitor* visitor) const {
visitor->Trace(session_storage_);
visitor->Trace(local_storage_);
Supplement<LocalDOMWindow>::Trace(visitor);
}
// static
const char DOMWindowStorage::kSupplementName[] = "DOMWindowStorage";
// static
DOMWindowStorage& DOMWindowStorage::From(LocalDOMWindow& window) {
DOMWindowStorage* supplement =
Supplement<LocalDOMWindow>::From<DOMWindowStorage>(window);
if (!supplement) {
supplement = MakeGarbageCollected<DOMWindowStorage>(window);
ProvideTo(window, supplement);
}
return *supplement;
}
// static
StorageArea* DOMWindowStorage::sessionStorage(LocalDOMWindow& window,
ExceptionState& exception_state) {
return From(window).sessionStorage(exception_state);
}
// static
StorageArea* DOMWindowStorage::localStorage(LocalDOMWindow& window,
ExceptionState& exception_state) {
return From(window).localStorage(exception_state);
}
StorageArea* DOMWindowStorage::sessionStorage(
ExceptionState& exception_state) const {
StorageArea* storage = GetOrCreateSessionStorage(exception_state, {});
if (!storage)
return nullptr;
LocalDOMWindow* window = GetSupplementable();
if (window->GetSecurityOrigin()->IsLocal())
UseCounter::Count(window, WebFeature::kFileAccessedSessionStorage);
if (!storage->CanAccessStorage()) {
exception_state.ThrowSecurityError(StorageArea::kAccessDeniedMessage);
return nullptr;
}
return storage;
}
StorageArea* DOMWindowStorage::localStorage(
ExceptionState& exception_state) const {
StorageArea* storage = GetOrCreateLocalStorage(exception_state, {});
if (!storage)
return nullptr;
LocalDOMWindow* window = GetSupplementable();
if (window->GetSecurityOrigin()->IsLocal())
UseCounter::Count(window, WebFeature::kFileAccessedLocalStorage);
if (!storage->CanAccessStorage()) {
exception_state.ThrowSecurityError(StorageArea::kAccessDeniedMessage);
return nullptr;
}
return storage;
}
void DOMWindowStorage::InitSessionStorage(
mojo::PendingRemote<mojom::blink::StorageArea> storage_area) const {
// It's safe to ignore exceptions here since this is just an optimization to
// avoid requesting the storage area later.
GetOrCreateSessionStorage(IGNORE_EXCEPTION_FOR_TESTING,
std::move(storage_area));
}
void DOMWindowStorage::InitLocalStorage(
mojo::PendingRemote<mojom::blink::StorageArea> storage_area) const {
// It's safe to ignore exceptions here since this is just an optimization to
// avoid requesting the storage area later.
GetOrCreateLocalStorage(IGNORE_EXCEPTION_FOR_TESTING,
std::move(storage_area));
}
StorageArea* DOMWindowStorage::GetOrCreateSessionStorage(
ExceptionState& exception_state,
mojo::PendingRemote<mojom::blink::StorageArea> storage_area_for_init)
const {
LocalDOMWindow* window = GetSupplementable();
if (!window->GetFrame())
return nullptr;
if (!window->GetSecurityOrigin()->CanAccessSessionStorage()) {
if (window->IsSandboxed(network::mojom::blink::WebSandboxFlags::kOrigin))
exception_state.ThrowSecurityError(StorageArea::kAccessSandboxedMessage);
else if (window->Url().ProtocolIs("data"))
exception_state.ThrowSecurityError(StorageArea::kAccessDataMessage);
else
exception_state.ThrowSecurityError(StorageArea::kAccessDeniedMessage);
return nullptr;
}
if (window->GetFrame()->Client()->IsDomStorageDisabled()) {
return nullptr;
}
if (session_storage_)
return session_storage_.Get();
StorageNamespace* storage_namespace =
StorageNamespace::From(window->GetFrame()->GetPage());
if (!storage_namespace)
return nullptr;
scoped_refptr<CachedStorageArea> cached_storage_area;
if (window->document()->IsPrerendering()) {
cached_storage_area = storage_namespace->CreateCachedAreaForPrerender(
window, std::move(storage_area_for_init));
} else {
cached_storage_area = storage_namespace->GetCachedArea(
window, std::move(storage_area_for_init));
}
session_storage_ =
StorageArea::Create(window, std::move(cached_storage_area),
StorageArea::StorageType::kSessionStorage);
return session_storage_.Get();
}
StorageArea* DOMWindowStorage::GetOrCreateLocalStorage(
ExceptionState& exception_state,
mojo::PendingRemote<mojom::blink::StorageArea> storage_area_for_init)
const {
LocalDOMWindow* window = GetSupplementable();
if (!window->GetFrame())
return nullptr;
if (!window->GetSecurityOrigin()->CanAccessLocalStorage()) {
if (window->IsSandboxed(network::mojom::blink::WebSandboxFlags::kOrigin))
exception_state.ThrowSecurityError(StorageArea::kAccessSandboxedMessage);
else if (window->Url().ProtocolIs("data"))
exception_state.ThrowSecurityError(StorageArea::kAccessDataMessage);
else
exception_state.ThrowSecurityError(StorageArea::kAccessDeniedMessage);
return nullptr;
}
if (!window->GetFrame()->GetSettings()->GetLocalStorageEnabled()) {
return nullptr;
}
if (window->GetFrame()->Client()->IsDomStorageDisabled()) {
return nullptr;
}
if (local_storage_)
return local_storage_.Get();
auto storage_area = StorageController::GetInstance()->GetLocalStorageArea(
window, std::move(storage_area_for_init));
local_storage_ = StorageArea::Create(window, std::move(storage_area),
StorageArea::StorageType::kLocalStorage);
return local_storage_.Get();
}
} // namespace blink
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