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/*
* Copyright (C) 2009 Google Inc. All Rights Reserved.
* (C) 2008 Apple Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "modules/storage/StorageArea.h"
#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/Document.h"
#include "core/dom/ExceptionCode.h"
#include "core/frame/LocalDOMWindow.h"
#include "core/frame/LocalFrame.h"
#include "core/page/Page.h"
#include "modules/storage/DOMWindowStorage.h"
#include "modules/storage/InspectorDOMStorageAgent.h"
#include "modules/storage/Storage.h"
#include "modules/storage/StorageClient.h"
#include "modules/storage/StorageEvent.h"
#include "modules/storage/StorageNamespace.h"
#include "modules/storage/StorageNamespaceController.h"
#include "platform/weborigin/SecurityOrigin.h"
#include "public/platform/WebStorageArea.h"
#include "public/platform/WebString.h"
#include "public/platform/WebURL.h"
namespace blink {
StorageArea* StorageArea::create(PassOwnPtr<WebStorageArea> storageArea, StorageType storageType)
{
return new StorageArea(storageArea, storageType);
}
StorageArea::StorageArea(PassOwnPtr<WebStorageArea> storageArea, StorageType storageType)
: LocalFrameLifecycleObserver(nullptr)
, m_storageArea(storageArea)
, m_storageType(storageType)
, m_canAccessStorageCachedResult(false)
{
}
StorageArea::~StorageArea()
{
}
DEFINE_TRACE(StorageArea)
{
LocalFrameLifecycleObserver::trace(visitor);
}
unsigned StorageArea::length(ExceptionState& exceptionState, LocalFrame* frame)
{
if (!canAccessStorage(frame)) {
exceptionState.throwSecurityError("access is denied for this document.");
return 0;
}
return m_storageArea->length();
}
String StorageArea::key(unsigned index, ExceptionState& exceptionState, LocalFrame* frame)
{
if (!canAccessStorage(frame)) {
exceptionState.throwSecurityError("access is denied for this document.");
return String();
}
return m_storageArea->key(index);
}
String StorageArea::getItem(const String& key, ExceptionState& exceptionState, LocalFrame* frame)
{
if (!canAccessStorage(frame)) {
exceptionState.throwSecurityError("access is denied for this document.");
return String();
}
return m_storageArea->getItem(key);
}
void StorageArea::setItem(const String& key, const String& value, ExceptionState& exceptionState, LocalFrame* frame)
{
if (!canAccessStorage(frame)) {
exceptionState.throwSecurityError("access is denied for this document.");
return;
}
WebStorageArea::Result result = WebStorageArea::ResultOK;
m_storageArea->setItem(key, value, frame->document()->url(), result);
if (result != WebStorageArea::ResultOK)
exceptionState.throwDOMException(QuotaExceededError, "Setting the value of '" + key + "' exceeded the quota.");
}
void StorageArea::removeItem(const String& key, ExceptionState& exceptionState, LocalFrame* frame)
{
if (!canAccessStorage(frame)) {
exceptionState.throwSecurityError("access is denied for this document.");
return;
}
m_storageArea->removeItem(key, frame->document()->url());
}
void StorageArea::clear(ExceptionState& exceptionState, LocalFrame* frame)
{
if (!canAccessStorage(frame)) {
exceptionState.throwSecurityError("access is denied for this document.");
return;
}
m_storageArea->clear(frame->document()->url());
}
bool StorageArea::contains(const String& key, ExceptionState& exceptionState, LocalFrame* frame)
{
if (!canAccessStorage(frame)) {
exceptionState.throwSecurityError("access is denied for this document.");
return false;
}
return !getItem(key, exceptionState, frame).isNull();
}
bool StorageArea::canAccessStorage(LocalFrame* frame)
{
if (!frame || !frame->page())
return false;
// LocalFrameLifecycleObserver is used to safely keep the cached
// reference to the LocalFrame. Should the LocalFrame die before
// this StorageArea does, that cached reference will be cleared.
if (this->frame() == frame)
return m_canAccessStorageCachedResult;
StorageNamespaceController* controller = StorageNamespaceController::from(frame->page());
if (!controller)
return false;
bool result = controller->storageClient()->canAccessStorage(frame, m_storageType);
// Move attention to the new LocalFrame.
LocalFrameLifecycleObserver::setContext(frame);
m_canAccessStorageCachedResult = result;
return result;
}
size_t StorageArea::memoryBytesUsedByCache()
{
return m_storageArea->memoryBytesUsedByCache();
}
void StorageArea::dispatchLocalStorageEvent(const String& key, const String& oldValue, const String& newValue, SecurityOrigin* securityOrigin, const KURL& pageURL, WebStorageArea* sourceAreaInstance, bool originatedInProcess)
{
// Iterate over all pages that have a StorageNamespaceController supplement.
for (Page* page : Page::ordinaryPages()) {
for (Frame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
// FIXME: We do not yet have a way to dispatch events to out-of-process frames.
if (!frame->isLocalFrame())
continue;
LocalFrame* localFrame = toLocalFrame(frame);
LocalDOMWindow* localWindow = localFrame->localDOMWindow();
Storage* storage = DOMWindowStorage::from(*localWindow).optionalLocalStorage();
if (storage && localFrame->document()->securityOrigin()->canAccess(securityOrigin) && !isEventSource(storage, sourceAreaInstance))
localFrame->localDOMWindow()->enqueueWindowEvent(StorageEvent::create(EventTypeNames::storage, key, oldValue, newValue, pageURL, storage));
}
if (InspectorDOMStorageAgent* agent = StorageNamespaceController::from(page)->inspectorAgent())
agent->didDispatchDOMStorageEvent(key, oldValue, newValue, LocalStorage, securityOrigin);
}
}
static Page* findPageWithSessionStorageNamespace(const WebStorageNamespace& sessionNamespace)
{
// Iterate over all pages that have a StorageNamespaceController supplement.
for (Page* page : Page::ordinaryPages()) {
const bool dontCreateIfMissing = false;
StorageNamespace* storageNamespace = StorageNamespaceController::from(page)->sessionStorage(dontCreateIfMissing);
if (storageNamespace && storageNamespace->isSameNamespace(sessionNamespace))
return page;
}
return nullptr;
}
void StorageArea::dispatchSessionStorageEvent(const String& key, const String& oldValue, const String& newValue, SecurityOrigin* securityOrigin, const KURL& pageURL, const WebStorageNamespace& sessionNamespace, WebStorageArea* sourceAreaInstance, bool originatedInProcess)
{
Page* page = findPageWithSessionStorageNamespace(sessionNamespace);
if (!page)
return;
for (Frame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
// FIXME: We do not yet have a way to dispatch events to out-of-process frames.
if (!frame->isLocalFrame())
continue;
LocalFrame* localFrame = toLocalFrame(frame);
LocalDOMWindow* localWindow = localFrame->localDOMWindow();
Storage* storage = DOMWindowStorage::from(*localWindow).optionalSessionStorage();
if (storage && localFrame->document()->securityOrigin()->canAccess(securityOrigin) && !isEventSource(storage, sourceAreaInstance))
localFrame->localDOMWindow()->enqueueWindowEvent(StorageEvent::create(EventTypeNames::storage, key, oldValue, newValue, pageURL, storage));
}
if (InspectorDOMStorageAgent* agent = StorageNamespaceController::from(page)->inspectorAgent())
agent->didDispatchDOMStorageEvent(key, oldValue, newValue, SessionStorage, securityOrigin);
}
bool StorageArea::isEventSource(Storage* storage, WebStorageArea* sourceAreaInstance)
{
ASSERT(storage);
StorageArea* area = storage->area();
return area->m_storageArea == sourceAreaInstance;
}
} // namespace blink
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