blob: 9cc5e7d0d39c724f200233d358e87419994f216a [file] [log] [blame]
// Copyright 2013 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 <map>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/optional.h"
#include "base/strings/nullable_string16.h"
#include "base/strings/string16.h"
#include "content/browser/bad_message.h"
#include "content/common/content_export.h"
#include "content/common/dom_storage/dom_storage_types.h"
class GURL;
namespace url {
class Origin;
namespace content {
class DOMStorageContextImpl;
class DOMStorageHost;
class DOMStorageNamespace;
class DOMStorageArea;
// One instance is allocated in the main process for each client process.
// Used by DOMStorageMessageFilter in Chrome.
// This class is single threaded, and performs blocking file reads/writes,
// so it shouldn't be used on chrome's IO thread.
// See class comments for DOMStorageContextImpl for a larger overview.
class CONTENT_EXPORT DOMStorageHost {
explicit DOMStorageHost(DOMStorageContextImpl* context);
base::Optional<bad_message::BadMessageReason> OpenStorageArea(
int connection_id,
const std::string& namespace_id,
const url::Origin& origin);
void CloseStorageArea(int connection_id);
bool ExtractAreaValues(int connection_id, DOMStorageValuesMap* map);
unsigned GetAreaLength(int connection_id);
base::NullableString16 GetAreaKey(int connection_id, unsigned index);
base::NullableString16 GetAreaItem(int connection_id,
const base::string16& key);
bool SetAreaItem(int connection_id,
const base::string16& key,
const base::string16& value,
const base::NullableString16& client_old_value,
const GURL& page_url);
bool RemoveAreaItem(int connection_id,
const base::string16& key,
const base::NullableString16& client_old_value,
const GURL& page_url);
bool ClearArea(int connection_id, const GURL& page_url);
bool HasAreaOpen(const std::string& namespace_id,
const url::Origin& origin) const;
bool HasConnection(int connection_id) const {
return !!GetOpenArea(connection_id);
// Struct to hold references needed for areas that are open
// within our associated client process.
struct NamespaceAndArea {
scoped_refptr<DOMStorageNamespace> namespace_;
scoped_refptr<DOMStorageArea> area_;
NamespaceAndArea(const NamespaceAndArea& other);
typedef std::map<int, NamespaceAndArea > AreaMap;
DOMStorageArea* GetOpenArea(int connection_id) const;
DOMStorageNamespace* GetNamespace(int connection_id) const;
scoped_refptr<DOMStorageContextImpl> context_;
AreaMap connections_;
std::map<DOMStorageArea*, int> areas_open_count_;
} // namespace content