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// 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 "sync/engine/download.h"
#include <string>
#include "sync/engine/syncer_proto_util.h"
#include "sync/sessions/sync_session.h"
#include "sync/sessions/sync_session_context.h"
#include "sync/syncable/directory.h"
#include "sync/syncable/nigori_handler.h"
#include "sync/syncable/syncable_read_transaction.h"
namespace syncer {
using sessions::StatusController;
using sessions::SyncSession;
using sessions::SyncSessionContext;
using std::string;
namespace {
SyncerError HandleGetEncryptionKeyResponse(
const sync_pb::ClientToServerResponse& update_response,
syncable::Directory* dir) {
bool success = false;
if (update_response.get_updates().encryption_keys_size() == 0) {
LOG(ERROR) << "Failed to receive encryption key from server.";
return SERVER_RESPONSE_VALIDATION_FAILED;
}
syncable::ReadTransaction trans(FROM_HERE, dir);
syncable::NigoriHandler* nigori_handler = dir->GetNigoriHandler();
success = nigori_handler->SetKeystoreKeys(
update_response.get_updates().encryption_keys(),
&trans);
DVLOG(1) << "GetUpdates returned "
<< update_response.get_updates().encryption_keys_size()
<< "encryption keys. Nigori keystore key "
<< (success ? "" : "not ") << "updated.";
return (success ? SYNCER_OK : SERVER_RESPONSE_VALIDATION_FAILED);
}
bool ShouldRequestEncryptionKey(
SyncSessionContext* context) {
bool need_encryption_key = false;
if (context->keystore_encryption_enabled()) {
syncable::Directory* dir = context->directory();
syncable::ReadTransaction trans(FROM_HERE, dir);
syncable::NigoriHandler* nigori_handler = dir->GetNigoriHandler();
need_encryption_key = nigori_handler->NeedKeystoreKey(&trans);
}
return need_encryption_key;
}
} // namespace
namespace download {
void InitDownloadUpdatesContext(
SyncSession* session,
bool create_mobile_bookmarks_folder,
sync_pb::ClientToServerMessage* message) {
message->set_share(session->context()->account_name());
message->set_message_contents(sync_pb::ClientToServerMessage::GET_UPDATES);
sync_pb::GetUpdatesMessage* get_updates = message->mutable_get_updates();
// We want folders for our associated types, always. If we were to set
// this to false, the server would send just the non-container items
// (e.g. Bookmark URLs but not their containing folders).
get_updates->set_fetch_folders(true);
get_updates->set_create_mobile_bookmarks_folder(
create_mobile_bookmarks_folder);
bool need_encryption_key = ShouldRequestEncryptionKey(session->context());
get_updates->set_need_encryption_key(need_encryption_key);
// Set legacy GetUpdatesMessage.GetUpdatesCallerInfo information.
get_updates->mutable_caller_info()->set_notifications_enabled(
session->context()->notifications_enabled());
}
SyncerError ExecuteDownloadUpdates(
ModelTypeSet request_types,
SyncSession* session,
GetUpdatesProcessor* get_updates_processor,
sync_pb::ClientToServerMessage* msg) {
sync_pb::ClientToServerResponse update_response;
StatusController* status = session->mutable_status_controller();
bool need_encryption_key = ShouldRequestEncryptionKey(session->context());
if (session->context()->debug_info_getter()) {
sync_pb::DebugInfo* debug_info = msg->mutable_debug_info();
CopyClientDebugInfo(session->context()->debug_info_getter(), debug_info);
}
SyncerError result = SyncerProtoUtil::PostClientToServerMessage(
msg,
&update_response,
session);
DVLOG(2) << SyncerProtoUtil::ClientToServerResponseDebugString(
update_response);
if (result != SYNCER_OK) {
LOG(ERROR) << "PostClientToServerMessage() failed during GetUpdates";
return result;
}
DVLOG(1) << "GetUpdates "
<< " returned " << update_response.get_updates().entries_size()
<< " updates and indicated "
<< update_response.get_updates().changes_remaining()
<< " updates left on server.";
if (session->context()->debug_info_getter()) {
// Clear debug info now that we have successfully sent it to the server.
DVLOG(1) << "Clearing client debug info.";
session->context()->debug_info_getter()->ClearDebugInfo();
}
if (need_encryption_key ||
update_response.get_updates().encryption_keys_size() > 0) {
syncable::Directory* dir = session->context()->directory();
status->set_last_get_key_result(
HandleGetEncryptionKeyResponse(update_response, dir));
}
return ProcessResponse(update_response.get_updates(),
request_types,
get_updates_processor,
status);
}
SyncerError ProcessResponse(
const sync_pb::GetUpdatesResponse& gu_response,
ModelTypeSet request_types,
GetUpdatesProcessor* get_updates_processor,
StatusController* status) {
status->increment_num_updates_downloaded_by(gu_response.entries_size());
// The changes remaining field is used to prevent the client from looping. If
// that field is being set incorrectly, we're in big trouble.
if (!gu_response.has_changes_remaining()) {
return SERVER_RESPONSE_VALIDATION_FAILED;
}
status->set_num_server_changes_remaining(gu_response.changes_remaining());
if (!get_updates_processor->ProcessGetUpdatesResponse(request_types,
gu_response,
status)) {
return SERVER_RESPONSE_VALIDATION_FAILED;
}
if (gu_response.changes_remaining() == 0) {
return SYNCER_OK;
} else {
return SERVER_MORE_TO_DOWNLOAD;
}
}
void CopyClientDebugInfo(
sessions::DebugInfoGetter* debug_info_getter,
sync_pb::DebugInfo* debug_info) {
DVLOG(1) << "Copying client debug info to send.";
debug_info_getter->GetDebugInfo(debug_info);
}
} // namespace download
} // namespace syncer
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