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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 "modules/storage/DOMWindowStorage.h"
#include "core/dom/Document.h"
#include "core/frame/FrameHost.h"
#include "core/frame/LocalDOMWindow.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Settings.h"
#include "core/page/Page.h"
#include "modules/storage/Storage.h"
#include "modules/storage/StorageNamespace.h"
#include "modules/storage/StorageNamespaceController.h"
#include "wtf/PassRefPtr.h"
namespace blink {
DOMWindowStorage::DOMWindowStorage(LocalDOMWindow& window)
: Supplement<LocalDOMWindow>(window) {}
DEFINE_TRACE(DOMWindowStorage) {
visitor->trace(m_sessionStorage);
visitor->trace(m_localStorage);
Supplement<LocalDOMWindow>::trace(visitor);
}
// static
const char* DOMWindowStorage::supplementName() {
return "DOMWindowStorage";
}
// static
DOMWindowStorage& DOMWindowStorage::from(LocalDOMWindow& window) {
DOMWindowStorage* supplement = static_cast<DOMWindowStorage*>(
Supplement<LocalDOMWindow>::from(window, supplementName()));
if (!supplement) {
supplement = new DOMWindowStorage(window);
provideTo(window, supplementName(), supplement);
}
return *supplement;
}
// static
Storage* DOMWindowStorage::sessionStorage(DOMWindow& window,
ExceptionState& exceptionState) {
return from(toLocalDOMWindow(window)).sessionStorage(exceptionState);
}
// static
Storage* DOMWindowStorage::localStorage(DOMWindow& window,
ExceptionState& exceptionState) {
return from(toLocalDOMWindow(window)).localStorage(exceptionState);
}
Storage* DOMWindowStorage::sessionStorage(
ExceptionState& exceptionState) const {
if (!supplementable()->frame())
return nullptr;
Document* document = supplementable()->frame()->document();
DCHECK(document);
String accessDeniedMessage = "Access is denied for this document.";
if (!document->getSecurityOrigin()->canAccessLocalStorage()) {
if (document->isSandboxed(SandboxOrigin))
exceptionState.throwSecurityError(
"The document is sandboxed and lacks the 'allow-same-origin' flag.");
else if (document->url().protocolIs("data"))
exceptionState.throwSecurityError(
"Storage is disabled inside 'data:' URLs.");
else
exceptionState.throwSecurityError(accessDeniedMessage);
return nullptr;
}
if (m_sessionStorage) {
if (!m_sessionStorage->area()->canAccessStorage(document->frame())) {
exceptionState.throwSecurityError(accessDeniedMessage);
return nullptr;
}
return m_sessionStorage;
}
Page* page = document->page();
if (!page)
return nullptr;
StorageArea* storageArea =
StorageNamespaceController::from(page)->sessionStorage()->storageArea(
document->getSecurityOrigin());
if (!storageArea->canAccessStorage(document->frame())) {
exceptionState.throwSecurityError(accessDeniedMessage);
return nullptr;
}
m_sessionStorage = Storage::create(document->frame(), storageArea);
return m_sessionStorage;
}
Storage* DOMWindowStorage::localStorage(ExceptionState& exceptionState) const {
if (!supplementable()->frame())
return nullptr;
Document* document = supplementable()->frame()->document();
DCHECK(document);
String accessDeniedMessage = "Access is denied for this document.";
if (!document->getSecurityOrigin()->canAccessLocalStorage()) {
if (document->isSandboxed(SandboxOrigin))
exceptionState.throwSecurityError(
"The document is sandboxed and lacks the 'allow-same-origin' flag.");
else if (document->url().protocolIs("data"))
exceptionState.throwSecurityError(
"Storage is disabled inside 'data:' URLs.");
else
exceptionState.throwSecurityError(accessDeniedMessage);
return nullptr;
}
if (m_localStorage) {
if (!m_localStorage->area()->canAccessStorage(document->frame())) {
exceptionState.throwSecurityError(accessDeniedMessage);
return nullptr;
}
return m_localStorage;
}
// FIXME: Seems this check should be much higher?
FrameHost* host = document->frameHost();
if (!host || !host->settings().getLocalStorageEnabled())
return nullptr;
StorageArea* storageArea =
StorageNamespace::localStorageArea(document->getSecurityOrigin());
if (!storageArea->canAccessStorage(document->frame())) {
exceptionState.throwSecurityError(accessDeniedMessage);
return nullptr;
}
m_localStorage = Storage::create(document->frame(), storageArea);
return m_localStorage;
}
} // namespace blink
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