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// Copyright 2014 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 "components/sessions/core/base_session_service_commands.h"
#include <stddef.h>
#include "base/pickle.h"
#include "components/sessions/core/session_backend.h"
#include "components/sessions/core/session_types.h"
namespace sessions {
namespace {
// Helper used by CreateUpdateTabNavigationCommand(). It writes |str| to
// |pickle|, if and only if |str| fits within (|max_bytes| - |*bytes_written|).
// |bytes_written| is incremented to reflect the data written.
void WriteStringToPickle(base::Pickle& pickle,
int* bytes_written,
int max_bytes,
const std::string& str) {
int num_bytes = str.size() * sizeof(char);
if (*bytes_written + num_bytes < max_bytes) {
*bytes_written += num_bytes;
pickle.WriteString(str);
} else {
pickle.WriteString(std::string());
}
}
bool ReadSessionIdFromPickle(base::PickleIterator* iterator, SessionID* id) {
SessionID::id_type value;
if (!iterator->ReadInt(&value)) {
return false;
}
*id = SessionID::FromSerializedValue(value);
return true;
}
} // namespace
std::unique_ptr<SessionCommand> CreateUpdateTabNavigationCommand(
SessionCommand::id_type command_id,
SessionID tab_id,
const sessions::SerializedNavigationEntry& navigation) {
// Use pickle to handle marshalling.
base::Pickle pickle;
pickle.WriteInt(tab_id.id());
// We only allow navigations up to 63k (which should be completely
// reasonable).
static const size_t max_state_size =
std::numeric_limits<SessionCommand::size_type>::max() - 1024;
navigation.WriteToPickle(max_state_size, &pickle);
return std::unique_ptr<SessionCommand>(
new SessionCommand(command_id, pickle));
}
std::unique_ptr<SessionCommand> CreateSetTabExtensionAppIDCommand(
SessionCommand::id_type command_id,
SessionID tab_id,
const std::string& extension_id) {
// Use pickle to handle marshalling.
base::Pickle pickle;
pickle.WriteInt(tab_id.id());
// Enforce a max for ids. They should never be anywhere near this size.
static const SessionCommand::size_type max_id_size =
std::numeric_limits<SessionCommand::size_type>::max() - 1024;
int bytes_written = 0;
WriteStringToPickle(pickle, &bytes_written, max_id_size, extension_id);
return std::unique_ptr<SessionCommand>(
new SessionCommand(command_id, pickle));
}
std::unique_ptr<SessionCommand> CreateSetTabUserAgentOverrideCommand(
SessionCommand::id_type command_id,
SessionID tab_id,
const std::string& user_agent_override) {
// Use pickle to handle marshalling.
base::Pickle pickle;
pickle.WriteInt(tab_id.id());
// Enforce a max for the user agent length. They should never be anywhere
// near this size.
static const SessionCommand::size_type max_user_agent_size =
std::numeric_limits<SessionCommand::size_type>::max() - 1024;
int bytes_written = 0;
WriteStringToPickle(pickle, &bytes_written, max_user_agent_size,
user_agent_override);
return std::unique_ptr<SessionCommand>(
new SessionCommand(command_id, pickle));
}
std::unique_ptr<SessionCommand> CreateSetWindowAppNameCommand(
SessionCommand::id_type command_id,
SessionID window_id,
const std::string& app_name) {
// Use pickle to handle marshalling.
base::Pickle pickle;
pickle.WriteInt(window_id.id());
// Enforce a max for ids. They should never be anywhere near this size.
static const SessionCommand::size_type max_id_size =
std::numeric_limits<SessionCommand::size_type>::max() - 1024;
int bytes_written = 0;
WriteStringToPickle(pickle, &bytes_written, max_id_size, app_name);
return std::unique_ptr<SessionCommand>(
new SessionCommand(command_id, pickle));
}
bool RestoreUpdateTabNavigationCommand(
const SessionCommand& command,
sessions::SerializedNavigationEntry* navigation,
SessionID* tab_id) {
std::unique_ptr<base::Pickle> pickle(command.PayloadAsPickle());
if (!pickle)
return false;
base::PickleIterator iterator(*pickle);
return ReadSessionIdFromPickle(&iterator, tab_id) &&
navigation->ReadFromPickle(&iterator);
}
bool RestoreSetTabExtensionAppIDCommand(const SessionCommand& command,
SessionID* tab_id,
std::string* extension_app_id) {
std::unique_ptr<base::Pickle> pickle(command.PayloadAsPickle());
if (!pickle)
return false;
base::PickleIterator iterator(*pickle);
return ReadSessionIdFromPickle(&iterator, tab_id) &&
iterator.ReadString(extension_app_id);
}
bool RestoreSetTabUserAgentOverrideCommand(const SessionCommand& command,
SessionID* tab_id,
std::string* user_agent_override) {
std::unique_ptr<base::Pickle> pickle(command.PayloadAsPickle());
if (!pickle)
return false;
base::PickleIterator iterator(*pickle);
return ReadSessionIdFromPickle(&iterator, tab_id) &&
iterator.ReadString(user_agent_override);
}
bool RestoreSetWindowAppNameCommand(const SessionCommand& command,
SessionID* window_id,
std::string* app_name) {
std::unique_ptr<base::Pickle> pickle(command.PayloadAsPickle());
if (!pickle)
return false;
base::PickleIterator iterator(*pickle);
return ReadSessionIdFromPickle(&iterator, window_id) &&
iterator.ReadString(app_name);
}
} // namespace sessions
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