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// Copyright (c) 2012 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 "content/browser/dom_storage/dom_storage_message_filter.h"
#include "base/auto_reset.h"
#include "base/bind.h"
#include "base/strings/nullable_string16.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/sequenced_worker_pool.h"
#include "content/browser/dom_storage/dom_storage_area.h"
#include "content/browser/dom_storage/dom_storage_context_wrapper.h"
#include "content/browser/dom_storage/dom_storage_host.h"
#include "content/browser/dom_storage/dom_storage_namespace.h"
#include "content/browser/dom_storage/dom_storage_task_runner.h"
#include "content/common/dom_storage/dom_storage_messages.h"
#include "content/public/browser/user_metrics.h"
#include "url/gurl.h"
namespace content {
DOMStorageMessageFilter::DOMStorageMessageFilter(
int unused,
DOMStorageContextWrapper* context)
: context_(context->context()),
connection_dispatching_message_for_(0) {
}
DOMStorageMessageFilter::~DOMStorageMessageFilter() {
DCHECK(!host_.get());
}
void DOMStorageMessageFilter::InitializeInSequence() {
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
host_.reset(new DOMStorageHost(context_.get()));
context_->AddEventObserver(this);
}
void DOMStorageMessageFilter::UninitializeInSequence() {
// TODO(michaeln): Restore this DCHECK once crbug/166470 and crbug/164403
// are resolved.
// DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
context_->RemoveEventObserver(this);
host_.reset();
}
void DOMStorageMessageFilter::OnFilterAdded(IPC::Channel* channel) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
BrowserMessageFilter::OnFilterAdded(channel);
context_->task_runner()->PostShutdownBlockingTask(
FROM_HERE,
DOMStorageTaskRunner::PRIMARY_SEQUENCE,
base::Bind(&DOMStorageMessageFilter::InitializeInSequence, this));
}
void DOMStorageMessageFilter::OnFilterRemoved() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
BrowserMessageFilter::OnFilterRemoved();
context_->task_runner()->PostShutdownBlockingTask(
FROM_HERE,
DOMStorageTaskRunner::PRIMARY_SEQUENCE,
base::Bind(&DOMStorageMessageFilter::UninitializeInSequence, this));
}
base::TaskRunner* DOMStorageMessageFilter::OverrideTaskRunnerForMessage(
const IPC::Message& message) {
if (IPC_MESSAGE_CLASS(message) == DOMStorageMsgStart)
return context_->task_runner();
return NULL;
}
bool DOMStorageMessageFilter::OnMessageReceived(const IPC::Message& message,
bool* message_was_ok) {
if (IPC_MESSAGE_CLASS(message) != DOMStorageMsgStart)
return false;
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(host_.get());
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_EX(DOMStorageMessageFilter, message, *message_was_ok)
IPC_MESSAGE_HANDLER(DOMStorageHostMsg_OpenStorageArea, OnOpenStorageArea)
IPC_MESSAGE_HANDLER(DOMStorageHostMsg_CloseStorageArea, OnCloseStorageArea)
IPC_MESSAGE_HANDLER(DOMStorageHostMsg_LoadStorageArea, OnLoadStorageArea)
IPC_MESSAGE_HANDLER(DOMStorageHostMsg_SetItem, OnSetItem)
IPC_MESSAGE_HANDLER(DOMStorageHostMsg_RemoveItem, OnRemoveItem)
IPC_MESSAGE_HANDLER(DOMStorageHostMsg_Clear, OnClear)
IPC_MESSAGE_HANDLER(DOMStorageHostMsg_FlushMessages, OnFlushMessages)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void DOMStorageMessageFilter::OnOpenStorageArea(int connection_id,
int64 namespace_id,
const GURL& origin) {
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
if (!host_->OpenStorageArea(connection_id, namespace_id, origin)) {
RecordAction(UserMetricsAction("BadMessageTerminate_DSMF_1"));
BadMessageReceived();
}
}
void DOMStorageMessageFilter::OnCloseStorageArea(int connection_id) {
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
host_->CloseStorageArea(connection_id);
}
void DOMStorageMessageFilter::OnLoadStorageArea(int connection_id,
DOMStorageValuesMap* map) {
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
if (!host_->ExtractAreaValues(connection_id, map)) {
RecordAction(UserMetricsAction("BadMessageTerminate_DSMF_2"));
BadMessageReceived();
}
Send(new DOMStorageMsg_AsyncOperationComplete(true));
}
void DOMStorageMessageFilter::OnSetItem(
int connection_id, const string16& key,
const string16& value, const GURL& page_url) {
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK_EQ(0, connection_dispatching_message_for_);
base::AutoReset<int> auto_reset(&connection_dispatching_message_for_,
connection_id);
base::NullableString16 not_used;
bool success = host_->SetAreaItem(connection_id, key, value,
page_url, ¬_used);
Send(new DOMStorageMsg_AsyncOperationComplete(success));
}
void DOMStorageMessageFilter::OnRemoveItem(
int connection_id, const string16& key,
const GURL& page_url) {
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK_EQ(0, connection_dispatching_message_for_);
base::AutoReset<int> auto_reset(&connection_dispatching_message_for_,
connection_id);
string16 not_used;
host_->RemoveAreaItem(connection_id, key, page_url, ¬_used);
Send(new DOMStorageMsg_AsyncOperationComplete(true));
}
void DOMStorageMessageFilter::OnClear(
int connection_id, const GURL& page_url) {
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK_EQ(0, connection_dispatching_message_for_);
base::AutoReset<int> auto_reset(&connection_dispatching_message_for_,
connection_id);
host_->ClearArea(connection_id, page_url);
Send(new DOMStorageMsg_AsyncOperationComplete(true));
}
void DOMStorageMessageFilter::OnFlushMessages() {
// Intentionally empty method body.
}
void DOMStorageMessageFilter::OnDOMStorageItemSet(
const DOMStorageArea* area,
const string16& key,
const string16& new_value,
const base::NullableString16& old_value,
const GURL& page_url) {
SendDOMStorageEvent(area, page_url,
base::NullableString16(key, false),
base::NullableString16(new_value, false),
old_value);
}
void DOMStorageMessageFilter::OnDOMStorageItemRemoved(
const DOMStorageArea* area,
const string16& key,
const string16& old_value,
const GURL& page_url) {
SendDOMStorageEvent(area, page_url,
base::NullableString16(key, false),
base::NullableString16(),
base::NullableString16(old_value, false));
}
void DOMStorageMessageFilter::OnDOMStorageAreaCleared(
const DOMStorageArea* area,
const GURL& page_url) {
SendDOMStorageEvent(area, page_url,
base::NullableString16(),
base::NullableString16(),
base::NullableString16());
}
void DOMStorageMessageFilter::SendDOMStorageEvent(
const DOMStorageArea* area,
const GURL& page_url,
const base::NullableString16& key,
const base::NullableString16& new_value,
const base::NullableString16& old_value) {
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
// Only send mutation events to processes which have the area open.
bool originated_in_process = connection_dispatching_message_for_ != 0;
if (originated_in_process ||
host_->HasAreaOpen(area->namespace_id(), area->origin())) {
DOMStorageMsg_Event_Params params;
params.origin = area->origin();
params.page_url = page_url;
params.connection_id = connection_dispatching_message_for_;
params.key = key;
params.new_value = new_value;
params.old_value = old_value;
params.namespace_id = area->namespace_id();
Send(new DOMStorageMsg_Event(params));
}
}
} // namespace content
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