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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 "chrome/browser/chromeos/policy/user_policy_disk_cache.h"
#include "base/bind.h"
#include "base/files/file_util.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/metrics/histogram.h"
#include "base/sequenced_task_runner.h"
#include "components/policy/core/common/cloud/enterprise_metrics.h"
#include "policy/proto/device_management_local.pb.h"
namespace em = enterprise_management;
namespace policy {
UserPolicyDiskCache::Delegate::~Delegate() {}
UserPolicyDiskCache::UserPolicyDiskCache(
const base::WeakPtr<Delegate>& delegate,
const base::FilePath& backing_file_path,
scoped_refptr<base::SequencedTaskRunner> background_task_runner)
: delegate_(delegate),
backing_file_path_(backing_file_path),
origin_task_runner_(base::MessageLoopProxy::current()),
background_task_runner_(background_task_runner) {}
void UserPolicyDiskCache::Load() {
DCHECK(origin_task_runner_->RunsTasksOnCurrentThread());
bool ret = background_task_runner_->PostTask(
FROM_HERE, base::Bind(&UserPolicyDiskCache::LoadOnFileThread, this));
DCHECK(ret);
}
void UserPolicyDiskCache::Store(
const em::CachedCloudPolicyResponse& policy) {
DCHECK(origin_task_runner_->RunsTasksOnCurrentThread());
background_task_runner_->PostTask(
FROM_HERE,
base::Bind(&UserPolicyDiskCache::StoreOnFileThread, this, policy));
}
UserPolicyDiskCache::~UserPolicyDiskCache() {}
void UserPolicyDiskCache::LoadOnFileThread() {
DCHECK(background_task_runner_->RunsTasksOnCurrentThread());
em::CachedCloudPolicyResponse cached_response;
if (!base::PathExists(backing_file_path_)) {
LoadDone(LOAD_RESULT_NOT_FOUND, cached_response);
return;
}
// Read the protobuf from the file.
std::string data;
if (!base::ReadFileToString(backing_file_path_, &data)) {
LOG(WARNING) << "Failed to read policy data from "
<< backing_file_path_.value();
LoadDone(LOAD_RESULT_READ_ERROR, cached_response);
return;
}
// Decode it.
if (!cached_response.ParseFromArray(data.c_str(), data.size())) {
LOG(WARNING) << "Failed to parse policy data read from "
<< backing_file_path_.value();
LoadDone(LOAD_RESULT_PARSE_ERROR, cached_response);
return;
}
LoadDone(LOAD_RESULT_SUCCESS, cached_response);
}
void UserPolicyDiskCache::LoadDone(
LoadResult result,
const em::CachedCloudPolicyResponse& policy) {
origin_task_runner_->PostTask(
FROM_HERE,
base::Bind(
&UserPolicyDiskCache::ReportResultOnUIThread, this, result, policy));
}
void UserPolicyDiskCache::ReportResultOnUIThread(
LoadResult result,
const em::CachedCloudPolicyResponse& policy) {
DCHECK(origin_task_runner_->RunsTasksOnCurrentThread());
switch (result) {
case LOAD_RESULT_NOT_FOUND:
break;
case LOAD_RESULT_READ_ERROR:
case LOAD_RESULT_PARSE_ERROR:
UMA_HISTOGRAM_ENUMERATION(policy::kMetricPolicy,
kMetricPolicyLoadFailed,
policy::kMetricPolicySize);
break;
case LOAD_RESULT_SUCCESS:
UMA_HISTOGRAM_ENUMERATION(policy::kMetricPolicy,
kMetricPolicyLoadSucceeded,
policy::kMetricPolicySize);
break;
}
if (delegate_.get())
delegate_->OnDiskCacheLoaded(result, policy);
}
void UserPolicyDiskCache::StoreOnFileThread(
const em::CachedCloudPolicyResponse& policy) {
DCHECK(background_task_runner_->RunsTasksOnCurrentThread());
std::string data;
if (!policy.SerializeToString(&data)) {
LOG(WARNING) << "Failed to serialize policy data";
UMA_HISTOGRAM_ENUMERATION(policy::kMetricPolicy,
kMetricPolicyStoreFailed,
policy::kMetricPolicySize);
return;
}
if (!base::CreateDirectory(backing_file_path_.DirName())) {
LOG(WARNING) << "Failed to create directory "
<< backing_file_path_.DirName().value();
UMA_HISTOGRAM_ENUMERATION(policy::kMetricPolicy,
kMetricPolicyStoreFailed,
policy::kMetricPolicySize);
return;
}
int size = data.size();
if (base::WriteFile(backing_file_path_, data.c_str(), size) != size) {
LOG(WARNING) << "Failed to write " << backing_file_path_.value();
UMA_HISTOGRAM_ENUMERATION(policy::kMetricPolicy,
kMetricPolicyStoreFailed,
policy::kMetricPolicySize);
return;
}
UMA_HISTOGRAM_ENUMERATION(policy::kMetricPolicy,
kMetricPolicyStoreSucceeded,
policy::kMetricPolicySize);
}
} // namespace policy
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