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// Copyright 2015 The Chromium Authors. All rights reserved.
// 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 "third_party/blink/public/common/features.h"
#include "third_party/blink/renderer/core/dom/document.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/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(blink::Visitor* visitor) {
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 {
if (!GetSupplementable()->GetFrame())
return nullptr;
Document* document = GetSupplementable()->GetFrame()->GetDocument();
DCHECK(document);
String access_denied_message = "Access is denied for this document.";
if (!document->GetSecurityOrigin()->CanAccessSessionStorage()) {
if (document->IsSandboxed(WebSandboxFlags::kOrigin))
exception_state.ThrowSecurityError(
"The document is sandboxed and lacks the 'allow-same-origin' flag.");
else if (document->Url().ProtocolIs("data"))
exception_state.ThrowSecurityError(
"Storage is disabled inside 'data:' URLs.");
else
exception_state.ThrowSecurityError(access_denied_message);
return nullptr;
}
if (document->GetSecurityOrigin()->IsLocal()) {
UseCounter::Count(document, WebFeature::kFileAccessedSessionStorage);
}
if (session_storage_) {
if (!session_storage_->CanAccessStorage()) {
exception_state.ThrowSecurityError(access_denied_message);
return nullptr;
}
return session_storage_;
}
Page* page = document->GetPage();
if (!page)
return nullptr;
StorageNamespace* storage_namespace = StorageNamespace::From(page);
if (!storage_namespace)
return nullptr;
auto storage_area =
storage_namespace->GetCachedArea(document->GetSecurityOrigin());
session_storage_ =
StorageArea::Create(document->GetFrame(), std::move(storage_area),
StorageArea::StorageType::kSessionStorage);
if (!session_storage_->CanAccessStorage()) {
exception_state.ThrowSecurityError(access_denied_message);
return nullptr;
}
return session_storage_;
}
StorageArea* DOMWindowStorage::localStorage(
ExceptionState& exception_state) const {
if (!GetSupplementable()->GetFrame())
return nullptr;
Document* document = GetSupplementable()->GetFrame()->GetDocument();
DCHECK(document);
String access_denied_message = "Access is denied for this document.";
if (!document->GetSecurityOrigin()->CanAccessLocalStorage()) {
if (document->IsSandboxed(WebSandboxFlags::kOrigin))
exception_state.ThrowSecurityError(
"The document is sandboxed and lacks the 'allow-same-origin' flag.");
else if (document->Url().ProtocolIs("data"))
exception_state.ThrowSecurityError(
"Storage is disabled inside 'data:' URLs.");
else
exception_state.ThrowSecurityError(access_denied_message);
return nullptr;
}
if (document->GetSecurityOrigin()->IsLocal()) {
UseCounter::Count(document, WebFeature::kFileAccessedLocalStorage);
}
if (local_storage_) {
if (!local_storage_->CanAccessStorage()) {
exception_state.ThrowSecurityError(access_denied_message);
return nullptr;
}
return local_storage_;
}
// FIXME: Seems this check should be much higher?
Page* page = document->GetPage();
if (!page || !page->GetSettings().GetLocalStorageEnabled())
return nullptr;
auto storage_area = StorageController::GetInstance()->GetLocalStorageArea(
document->GetSecurityOrigin());
local_storage_ =
StorageArea::Create(document->GetFrame(), std::move(storage_area),
StorageArea::StorageType::kLocalStorage);
if (!local_storage_->CanAccessStorage()) {
exception_state.ThrowSecurityError(access_denied_message);
return nullptr;
}
return local_storage_;
}
} // namespace blink
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