path: root/content/browser/in_process_webkit/indexed_db_dispatcher_host.cc

// 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/in_process_webkit/indexed_db_dispatcher_host.h"

#include <vector>

#include "base/bind.h"
#include "base/command_line.h"
#include "base/process.h"
#include "base/process_util.h"
#include "base/utf_string_conversions.h"
#include "content/browser/in_process_webkit/indexed_db_callbacks.h"
#include "content/browser/in_process_webkit/indexed_db_context_impl.h"
#include "content/browser/in_process_webkit/indexed_db_database_callbacks.h"
#include "content/browser/renderer_host/render_message_filter.h"
#include "content/common/indexed_db/indexed_db_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/result_codes.h"
#include "googleurl/src/gurl.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebVector.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDOMStringList.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBCursor.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBDatabase.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBDatabaseCallbacks.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBDatabaseError.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBDatabaseException.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBFactory.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBMetadata.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
#include "webkit/base/file_path_string_conversions.h"
#include "webkit/database/database_util.h"

using webkit_database::DatabaseUtil;
using WebKit::WebDOMStringList;
using WebKit::WebExceptionCode;
using WebKit::WebIDBCallbacks;
using WebKit::WebIDBCursor;
using WebKit::WebIDBDatabase;
using WebKit::WebIDBDatabaseError;
using WebKit::WebIDBIndex;
using WebKit::WebIDBKey;
using WebKit::WebIDBMetadata;
using WebKit::WebIDBObjectStore;
using WebKit::WebSecurityOrigin;
using WebKit::WebSerializedScriptValue;
using WebKit::WebVector;

namespace content {
namespace {

template <class T>
void DeleteOnWebKitThread(T* obj) {
  if (!BrowserThread::DeleteSoon(BrowserThread::WEBKIT_DEPRECATED,
                                 FROM_HERE, obj))
    delete obj;
}
}

IndexedDBDispatcherHost::IndexedDBDispatcherHost(
    int ipc_process_id, IndexedDBContextImpl* indexed_db_context)
    : indexed_db_context_(indexed_db_context),
      ALLOW_THIS_IN_INITIALIZER_LIST(database_dispatcher_host_(
          new DatabaseDispatcherHost(this))),
      ALLOW_THIS_IN_INITIALIZER_LIST(cursor_dispatcher_host_(
          new CursorDispatcherHost(this))),
      ipc_process_id_(ipc_process_id) {
  DCHECK(indexed_db_context_.get());
}

IndexedDBDispatcherHost::~IndexedDBDispatcherHost() {
}

void IndexedDBDispatcherHost::OnChannelClosing() {
  BrowserMessageFilter::OnChannelClosing();

  bool success = BrowserThread::PostTask(
      BrowserThread::WEBKIT_DEPRECATED, FROM_HERE,
      base::Bind(&IndexedDBDispatcherHost::ResetDispatcherHosts, this));

  if (!success)
    ResetDispatcherHosts();
}

void IndexedDBDispatcherHost::ResetDispatcherHosts() {
  // It is important that the various *_dispatcher_host_ members are reset
  // on the WebKit thread, since there might be incoming messages on that
  // thread, and we must not reset the dispatcher hosts until after those
  // messages are processed.
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED) ||
         CommandLine::ForCurrentProcess()->HasSwitch(switches::kSingleProcess));

  database_dispatcher_host_.reset();
  cursor_dispatcher_host_.reset();
}

void IndexedDBDispatcherHost::OverrideThreadForMessage(
    const IPC::Message& message,
    BrowserThread::ID* thread) {
  if (IPC_MESSAGE_CLASS(message) == IndexedDBMsgStart)
    *thread = BrowserThread::WEBKIT_DEPRECATED;
}

bool IndexedDBDispatcherHost::OnMessageReceived(const IPC::Message& message,
                                                bool* message_was_ok) {
  if (IPC_MESSAGE_CLASS(message) != IndexedDBMsgStart)
    return false;

  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));

  bool handled =
      database_dispatcher_host_->OnMessageReceived(message, message_was_ok) ||
      cursor_dispatcher_host_->OnMessageReceived(message, message_was_ok);

  if (!handled) {
    handled = true;
    IPC_BEGIN_MESSAGE_MAP_EX(IndexedDBDispatcherHost, message, *message_was_ok)
      IPC_MESSAGE_HANDLER(IndexedDBHostMsg_FactoryGetDatabaseNames,
                          OnIDBFactoryGetDatabaseNames)
      IPC_MESSAGE_HANDLER(IndexedDBHostMsg_FactoryOpen, OnIDBFactoryOpen)
      IPC_MESSAGE_HANDLER(IndexedDBHostMsg_FactoryDeleteDatabase,
                          OnIDBFactoryDeleteDatabase)
      IPC_MESSAGE_UNHANDLED(handled = false)
    IPC_END_MESSAGE_MAP()
  }
  return handled;
}

int32 IndexedDBDispatcherHost::Add(WebIDBCursor* idb_cursor) {
  if (!cursor_dispatcher_host_.get()) {
    delete idb_cursor;
    return 0;
  }
  return cursor_dispatcher_host_->map_.Add(idb_cursor);
}

int32 IndexedDBDispatcherHost::Add(WebIDBDatabase* idb_database,
                                   int32 ipc_thread_id,
                                   const GURL& origin_url) {
  if (!database_dispatcher_host_.get()) {
    delete idb_database;
    return 0;
  }
  int32 ipc_database_id = database_dispatcher_host_->map_.Add(idb_database);
  Context()->ConnectionOpened(origin_url, idb_database);
  database_dispatcher_host_->database_url_map_[ipc_database_id] = origin_url;
  return ipc_database_id;
}

void IndexedDBDispatcherHost::RegisterTransactionId(
    int64 host_transaction_id,
    const GURL& url)
{
  if (!database_dispatcher_host_)
    return;
  database_dispatcher_host_->transaction_url_map_[host_transaction_id] = url;
}

int64 IndexedDBDispatcherHost::HostTransactionId(int64 transaction_id) {
  // Inject the renderer process id into the transaction id, to
  // uniquely identify this transaction, and effectively bind it to
  // the renderer that initiated it. The lower 32 bits of
  // transaction_id are guaranteed to be unique within that renderer.
  base::ProcessId pid = base::GetProcId(peer_handle());
  DCHECK(!(transaction_id >> 32)) << "Transaction ids can only be 32 bits";
  COMPILE_ASSERT(sizeof(base::ProcessId) <= sizeof(int32),
                 Process_ID_must_fit_in_32_bits);

  return transaction_id | (static_cast<uint64>(pid) << 32);
}

int64 IndexedDBDispatcherHost::RendererTransactionId(
    int64 host_transaction_id) {
  DCHECK(host_transaction_id >> 32 == base::GetProcId(peer_handle())) <<
      "Invalid renderer target for transaction id";
  return host_transaction_id & 0xffffffff;
}

WebIDBCursor* IndexedDBDispatcherHost::GetCursorFromId(int32 ipc_cursor_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  return cursor_dispatcher_host_->map_.Lookup(ipc_cursor_id);
}

IndexedDBDatabaseMetadata IndexedDBDispatcherHost::ConvertMetadata(
    const WebIDBMetadata& web_metadata)
{
  IndexedDBDatabaseMetadata metadata;
  metadata.id = web_metadata.id;
  metadata.name = web_metadata.name;
  metadata.version = web_metadata.version;
  metadata.int_version = web_metadata.intVersion;
  metadata.max_object_store_id = web_metadata.maxObjectStoreId;

  for (size_t i = 0; i < web_metadata.objectStores.size(); ++i) {
    const WebIDBMetadata::ObjectStore& web_store_metadata =
        web_metadata.objectStores[i];
    IndexedDBObjectStoreMetadata idb_store_metadata;
    idb_store_metadata.id = web_store_metadata.id;
    idb_store_metadata.name = web_store_metadata.name;
    idb_store_metadata.keyPath = IndexedDBKeyPath(web_store_metadata.keyPath);
    idb_store_metadata.autoIncrement = web_store_metadata.autoIncrement;
    idb_store_metadata.max_index_id = web_store_metadata.maxIndexId;

    for (size_t j = 0; j < web_store_metadata.indexes.size(); ++j) {
      const WebIDBMetadata::Index& web_index_metadata =
          web_store_metadata.indexes[j];
      IndexedDBIndexMetadata idb_index_metadata;
      idb_index_metadata.id = web_index_metadata.id;
      idb_index_metadata.name = web_index_metadata.name;
      idb_index_metadata.keyPath = IndexedDBKeyPath(web_index_metadata.keyPath);
      idb_index_metadata.unique = web_index_metadata.unique;
      idb_index_metadata.multiEntry = web_index_metadata.multiEntry;
      idb_store_metadata.indexes.push_back(idb_index_metadata);
    }
    metadata.object_stores.push_back(idb_store_metadata);
  }
  return metadata;
}

void IndexedDBDispatcherHost::OnIDBFactoryGetDatabaseNames(
    const IndexedDBHostMsg_FactoryGetDatabaseNames_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  base::FilePath indexed_db_path = indexed_db_context_->data_path();

  WebSecurityOrigin origin(
      WebSecurityOrigin::createFromDatabaseIdentifier(params.origin));

  Context()->GetIDBFactory()->getDatabaseNames(
      new IndexedDBCallbacks<WebDOMStringList>(this, params.ipc_thread_id,
      params.ipc_response_id), origin, NULL,
      webkit_base::FilePathToWebString(indexed_db_path));
}

void IndexedDBDispatcherHost::OnIDBFactoryOpen(
    const IndexedDBHostMsg_FactoryOpen_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  base::FilePath indexed_db_path = indexed_db_context_->data_path();

  GURL origin_url = DatabaseUtil::GetOriginFromIdentifier(params.origin);
  WebSecurityOrigin origin(
      WebSecurityOrigin::createFromDatabaseIdentifier(params.origin));

  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));

  int64 host_transaction_id = HostTransactionId(params.transaction_id);

  // TODO(dgrogan): Don't let a non-existing database be opened (and therefore
  // created) if this origin is already over quota.
  Context()->GetIDBFactory()->open(
      params.name,
      params.version,
      host_transaction_id,
      new IndexedDBCallbacksDatabase(this, params.ipc_thread_id,
                                     params.ipc_response_id,
                                     host_transaction_id,
                                     origin_url),
      new IndexedDBDatabaseCallbacks(this, params.ipc_thread_id,
                                     params.ipc_database_response_id),
      origin, NULL, webkit_base::FilePathToWebString(indexed_db_path));
}

void IndexedDBDispatcherHost::OnIDBFactoryDeleteDatabase(
    const IndexedDBHostMsg_FactoryDeleteDatabase_Params& params) {
  base::FilePath indexed_db_path = indexed_db_context_->data_path();

  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  Context()->GetIDBFactory()->deleteDatabase(
      params.name,
      new IndexedDBCallbacks<WebSerializedScriptValue>(this,
                                                       params.ipc_thread_id,
                                                       params.ipc_response_id),
      WebSecurityOrigin::createFromDatabaseIdentifier(params.origin), NULL,
      webkit_base::FilePathToWebString(indexed_db_path));
}

void IndexedDBDispatcherHost::FinishTransaction(
    int64 host_transaction_id, bool committed) {
  if (committed)
    Context()->TransactionComplete(
        database_dispatcher_host_->transaction_url_map_[host_transaction_id]);
  database_dispatcher_host_->transaction_url_map_.erase(host_transaction_id);
  database_dispatcher_host_->transaction_size_map_.erase(host_transaction_id);
}

//////////////////////////////////////////////////////////////////////
// Helper templates.
//

template <typename ObjectType>
ObjectType* IndexedDBDispatcherHost::GetOrTerminateProcess(
    IDMap<ObjectType, IDMapOwnPointer>* map, int32 ipc_return_object_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  ObjectType* return_object = map->Lookup(ipc_return_object_id);
  if (!return_object) {
    NOTREACHED() << "Uh oh, couldn't find object with id "
                 << ipc_return_object_id;
    RecordAction(UserMetricsAction("BadMessageTerminate_IDBMF"));
    BadMessageReceived();
  }
  return return_object;
}

template <typename ObjectType>
void IndexedDBDispatcherHost::DestroyObject(
    IDMap<ObjectType, IDMapOwnPointer>* map, int32 ipc_object_id) {
  GetOrTerminateProcess(map, ipc_object_id);
  map->Remove(ipc_object_id);
}


//////////////////////////////////////////////////////////////////////
// IndexedDBDispatcherHost::DatabaseDispatcherHost
//

IndexedDBDispatcherHost::DatabaseDispatcherHost::DatabaseDispatcherHost(
    IndexedDBDispatcherHost* parent)
    : parent_(parent) {
  map_.set_check_on_null_data(true);
}

IndexedDBDispatcherHost::DatabaseDispatcherHost::~DatabaseDispatcherHost() {
  for (WebIDBObjectIDToURLMap::iterator iter = database_url_map_.begin();
       iter != database_url_map_.end(); iter++) {
    WebIDBDatabase* database = map_.Lookup(iter->first);
    if (database) {
      database->close();
      parent_->Context()->ConnectionClosed(iter->second, database);
    }
  }
}

bool IndexedDBDispatcherHost::DatabaseDispatcherHost::OnMessageReceived(
    const IPC::Message& message, bool* msg_is_ok) {
  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP_EX(IndexedDBDispatcherHost::DatabaseDispatcherHost,
                           message, *msg_is_ok)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseCreateObjectStore,
                        OnCreateObjectStore)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseDeleteObjectStore,
                        OnDeleteObjectStore)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseCreateTransaction,
                        OnCreateTransaction)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseClose, OnClose)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseDestroyed, OnDestroyed)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseGet, OnGet)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabasePut, OnPut)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseSetIndexKeys,
                        OnSetIndexKeys)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseSetIndexesReady,
                        OnSetIndexesReady)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseOpenCursor, OnOpenCursor)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseCount, OnCount)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseDeleteRange, OnDeleteRange)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseClear, OnClear)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseCreateIndex,
                        OnCreateIndex)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseDeleteIndex,
                        OnDeleteIndex)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseAbort,
                        OnAbort)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_DatabaseCommit,
                        OnCommit)
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP()
  return handled;
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::Send(
    IPC::Message* message) {
  parent_->Send(message);
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnCreateObjectStore(
    const IndexedDBHostMsg_DatabaseCreateObjectStore_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, params.ipc_database_id);
  if (!database)
    return;

  int64 host_transaction_id = parent_->HostTransactionId(params.transaction_id);
  database->createObjectStore(
      host_transaction_id,
      params.object_store_id,
      params.name, params.key_path, params.auto_increment);
  if (parent_->Context()->IsOverQuota(
      database_url_map_[params.ipc_database_id])) {
    database->abort(host_transaction_id);
  }
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnDeleteObjectStore(
    int32 ipc_database_id,
    int64 transaction_id,
    int64 object_store_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, ipc_database_id);
  if (!database)
    return;

  database->deleteObjectStore(parent_->HostTransactionId(transaction_id),
                              object_store_id);
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnCreateTransaction(
    const IndexedDBHostMsg_DatabaseCreateTransaction_Params& params) {
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, params.ipc_database_id);
  if (!database)
      return;

  WebVector<long long> object_stores(params.object_store_ids.size());
  for (size_t i = 0; i < params.object_store_ids.size(); ++i)
      object_stores[i] = params.object_store_ids[i];

  int64 host_transaction_id = parent_->HostTransactionId(params.transaction_id);

  database->createTransaction(
      host_transaction_id,
      new IndexedDBDatabaseCallbacks(parent_, params.ipc_thread_id,
                                     params.ipc_database_response_id),
      object_stores, params.mode);
  parent_->RegisterTransactionId(host_transaction_id,
                                 database_url_map_[params.ipc_database_id]);
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnClose(
    int32 ipc_database_id) {
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, ipc_database_id);
  if (!database)
    return;
  database->close();
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnDestroyed(
    int32 ipc_object_id) {
  WebIDBDatabase* database = map_.Lookup(ipc_object_id);
  parent_->Context()->ConnectionClosed(database_url_map_[ipc_object_id],
                                       database);
  database_url_map_.erase(ipc_object_id);
  parent_->DestroyObject(&map_, ipc_object_id);
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnGet(
    const IndexedDBHostMsg_DatabaseGet_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, params.ipc_database_id);
  if (!database)
    return;

  scoped_ptr<WebIDBCallbacks> callbacks(
      new IndexedDBCallbacks<WebSerializedScriptValue>(
          parent_, params.ipc_thread_id,
          params.ipc_response_id));
  database->get(parent_->HostTransactionId(params.transaction_id),
                params.object_store_id,
                params.index_id,
                params.key_range, params.key_only, callbacks.release());
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnPut(
    const IndexedDBHostMsg_DatabasePut_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));

  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, params.ipc_database_id);
  if (!database)
    return;
  scoped_ptr<WebIDBCallbacks> callbacks(
      new IndexedDBCallbacks<WebIDBKey>(parent_, params.ipc_thread_id,
                                        params.ipc_response_id));
  if (params.index_ids.size() != params.index_keys.size()) {
    callbacks->onError(WebIDBDatabaseError(
        WebKit::WebIDBDatabaseExceptionUnknownError,
        "Malformed IPC message: index_ids.size() != index_keys.size()"));
    return;
  }

  WebVector<unsigned char> value(params.value);
  int64 host_transaction_id = parent_->HostTransactionId(params.transaction_id);
  database->put(host_transaction_id,
                params.object_store_id,
                &value, params.key,
                params.put_mode, callbacks.release(),
                params.index_ids,
                params.index_keys);
  TransactionIDToSizeMap* map =
      &parent_->database_dispatcher_host_->transaction_size_map_;
  // Size can't be big enough to overflow because it represents the
  // actual bytes passed through IPC.
  (*map)[host_transaction_id] += params.value.size();
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnSetIndexKeys(
    const IndexedDBHostMsg_DatabaseSetIndexKeys_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, params.ipc_database_id);
  if (!database)
    return;

  int64 host_transaction_id = parent_->HostTransactionId(params.transaction_id);
  if (params.index_ids.size() != params.index_keys.size()) {
    database->abort(host_transaction_id, WebIDBDatabaseError(
        WebKit::WebIDBDatabaseExceptionUnknownError,
        "Malformed IPC message: index_ids.size() != index_keys.size()"));
    return;
  }

  database->setIndexKeys(host_transaction_id,
                         params.object_store_id,
                         params.primary_key, params.index_ids,
                         params.index_keys);
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnSetIndexesReady(
    int32 ipc_database_id,
    int64 transaction_id,
    int64 object_store_id,
    const std::vector<int64>& index_ids) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, ipc_database_id);
  if (!database)
    return;

  database->setIndexesReady(parent_->HostTransactionId(transaction_id),
                            object_store_id,
                            WebVector<long long>(index_ids));
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnOpenCursor(
    const IndexedDBHostMsg_DatabaseOpenCursor_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, params.ipc_database_id);
  if (!database)
    return;

  scoped_ptr<WebIDBCallbacks> callbacks(
      new IndexedDBCallbacks<WebIDBCursor>(parent_, params.ipc_thread_id,
                                           params.ipc_response_id, -1));
  database->openCursor(
      parent_->HostTransactionId(params.transaction_id),
      params.object_store_id, params.index_id,
      params.key_range, params.direction, params.key_only, params.task_type,
      callbacks.release());
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnCount(
    const IndexedDBHostMsg_DatabaseCount_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, params.ipc_database_id);
  if (!database)
    return;

  scoped_ptr<WebIDBCallbacks> callbacks(
      new IndexedDBCallbacks<WebSerializedScriptValue>(
          parent_, params.ipc_thread_id,
          params.ipc_response_id));
  database->count(
      parent_->HostTransactionId(params.transaction_id),
      params.object_store_id, params.index_id,
      params.key_range, callbacks.release());
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnDeleteRange(
    const IndexedDBHostMsg_DatabaseDeleteRange_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, params.ipc_database_id);
  if (!database)
    return;

  scoped_ptr<WebIDBCallbacks> callbacks(
      new IndexedDBCallbacks<WebSerializedScriptValue>(
          parent_, params.ipc_thread_id,
          params.ipc_response_id));
  database->deleteRange(parent_->HostTransactionId(params.transaction_id),
                        params.object_store_id,
                        params.key_range, callbacks.release());
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnClear(
    int32 ipc_thread_id,
    int32 ipc_response_id,
    int32 ipc_database_id,
    int64 transaction_id,
    int64 object_store_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, ipc_database_id);
  if (!database)
    return;

  scoped_ptr<WebIDBCallbacks> callbacks(
      new IndexedDBCallbacks<WebSerializedScriptValue>(
          parent_, ipc_thread_id,
          ipc_response_id));

  database->clear(parent_->HostTransactionId(transaction_id),
                  object_store_id, callbacks.release());
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnAbort(
    int32 ipc_database_id,
    int64 transaction_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, ipc_database_id);
  if (!database)
    return;

  database->abort(parent_->HostTransactionId(transaction_id));
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnCommit(
    int32 ipc_database_id,
    int64 transaction_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, ipc_database_id);
  if (!database)
    return;

  int64 host_transaction_id = parent_->HostTransactionId(transaction_id);
  if (parent_->Context()->WouldBeOverQuota(
          transaction_url_map_[host_transaction_id],
          transaction_size_map_[host_transaction_id])) {
    database->abort(host_transaction_id, WebIDBDatabaseError(
        WebKit::WebIDBDatabaseExceptionQuotaError));
    return;
  }

  database->commit(host_transaction_id);
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnCreateIndex(
    const IndexedDBHostMsg_DatabaseCreateIndex_Params& params) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, params.ipc_database_id);
  if (!database)
    return;

  int64 host_transaction_id = parent_->HostTransactionId(params.transaction_id);
  database->createIndex(
      host_transaction_id,
      params.object_store_id,
      params.index_id,
      params.name,
      params.key_path,
      params.unique,
      params.multi_entry);
  if (parent_->Context()->IsOverQuota(
      database_url_map_[params.ipc_database_id])) {
    database->abort(host_transaction_id);
  }
}

void IndexedDBDispatcherHost::DatabaseDispatcherHost::OnDeleteIndex(
    int32 ipc_database_id,
    int64 transaction_id,
    int64 object_store_id,
    int64 index_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBDatabase* database = parent_->GetOrTerminateProcess(
      &map_, ipc_database_id);
  if (!database)
    return;

  database->deleteIndex(parent_->HostTransactionId(transaction_id),
                        object_store_id, index_id);
}

//////////////////////////////////////////////////////////////////////
// IndexedDBDispatcherHost::CursorDispatcherHost
//

IndexedDBDispatcherHost::CursorDispatcherHost::CursorDispatcherHost(
    IndexedDBDispatcherHost* parent)
    : parent_(parent) {
  map_.set_check_on_null_data(true);
}

IndexedDBDispatcherHost::CursorDispatcherHost::~CursorDispatcherHost() {
}

bool IndexedDBDispatcherHost::CursorDispatcherHost::OnMessageReceived(
    const IPC::Message& message, bool* msg_is_ok) {
  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP_EX(IndexedDBDispatcherHost::CursorDispatcherHost,
                           message, *msg_is_ok)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_CursorAdvance, OnAdvance)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_CursorContinue, OnContinue)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_CursorPrefetch, OnPrefetch)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_CursorPrefetchReset, OnPrefetchReset)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_CursorDelete, OnDelete)
    IPC_MESSAGE_HANDLER(IndexedDBHostMsg_CursorDestroyed, OnDestroyed)
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP()
  return handled;
}


void IndexedDBDispatcherHost::CursorDispatcherHost::Send(
    IPC::Message* message) {
  parent_->Send(message);
}


void IndexedDBDispatcherHost::CursorDispatcherHost::OnAdvance(
    int32 ipc_cursor_id,
    int32 ipc_thread_id,
    int32 ipc_response_id,
    unsigned long count) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBCursor* idb_cursor = parent_->GetOrTerminateProcess(
      &map_, ipc_cursor_id);
  if (!idb_cursor)
    return;

  WebKit::WebExceptionCode ec = 0;
  idb_cursor->advance(count,
                      new IndexedDBCallbacks<WebIDBCursor>(parent_,
                                                           ipc_thread_id,
                                                           ipc_response_id,
                                                           ipc_cursor_id),
                      ec);
  DCHECK(!ec);
}

void IndexedDBDispatcherHost::CursorDispatcherHost::OnContinue(
    int32 ipc_cursor_id,
    int32 ipc_thread_id,
    int32 ipc_response_id,
    const IndexedDBKey& key) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBCursor* idb_cursor = parent_->GetOrTerminateProcess(&map_,
                                                            ipc_cursor_id);
  if (!idb_cursor)
    return;

  WebKit::WebExceptionCode ec = 0;
  idb_cursor->continueFunction(
      key, new IndexedDBCallbacks<WebIDBCursor>(parent_, ipc_thread_id,
                                                ipc_response_id,
                                                ipc_cursor_id), ec);
  DCHECK(!ec);
}

void IndexedDBDispatcherHost::CursorDispatcherHost::OnPrefetch(
    int32 ipc_cursor_id,
    int32 ipc_thread_id,
    int32 ipc_response_id,
    int n) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBCursor* idb_cursor = parent_->GetOrTerminateProcess(&map_,
                                                            ipc_cursor_id);
  if (!idb_cursor)
    return;

  WebKit::WebExceptionCode ec = 0;
  idb_cursor->prefetchContinue(
      n, new IndexedDBCallbacks<WebIDBCursor>(parent_, ipc_thread_id,
                                              ipc_response_id,
                                              ipc_cursor_id), ec);
  DCHECK(!ec);
}

void IndexedDBDispatcherHost::CursorDispatcherHost::OnPrefetchReset(
    int32 ipc_cursor_id, int used_prefetches, int unused_prefetches) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBCursor* idb_cursor = parent_->GetOrTerminateProcess(&map_,
                                                            ipc_cursor_id);
  if (!idb_cursor)
    return;

  idb_cursor->prefetchReset(used_prefetches, unused_prefetches);
}

void IndexedDBDispatcherHost::CursorDispatcherHost::OnDelete(
    int32 ipc_cursor_id,
    int32 ipc_thread_id,
    int32 ipc_response_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT_DEPRECATED));
  WebIDBCursor* idb_cursor = parent_->GetOrTerminateProcess(&map_,
                                                            ipc_cursor_id);
  if (!idb_cursor)
    return;

  WebKit::WebExceptionCode ec = 0;
  idb_cursor->deleteFunction(
      new IndexedDBCallbacks<WebSerializedScriptValue>(parent_, ipc_thread_id,
                                                       ipc_response_id), ec);
  DCHECK(!ec);
}

void IndexedDBDispatcherHost::CursorDispatcherHost::OnDestroyed(
    int32 ipc_object_id) {
  parent_->DestroyObject(&map_, ipc_object_id);
}

}  // namespace content