Move policy code into components/policy.

chrome/browser/policy/cloud/component_cloud_policy_updater.cc

-// Copyright (c) 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 "chrome/browser/policy/cloud/component_cloud_policy_updater.h"
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/logging.h"
-#include "base/sequenced_task_runner.h"
-#include "base/strings/string_number_conversions.h"
-#include "chrome/browser/policy/cloud/component_cloud_policy_store.h"
-#include "chrome/browser/policy/cloud/external_policy_data_fetcher.h"
-#include "chrome/browser/policy/proto/cloud/chrome_extension_policy.pb.h"
-#include "chrome/browser/policy/proto/cloud/device_management_backend.pb.h"
-
-namespace em = enterprise_management;
-
-namespace policy {
-
-namespace {
-
-// The maximum size of the serialized policy protobuf.
-const size_t kPolicyProtoMaxSize = 16 * 1024;
-
-// The maximum size of the downloaded policy data.
-const int64 kPolicyDataMaxSize = 5 * 1024 * 1024;
-
-// Tha maximum number of policy data fetches to run in parallel.
-const int64 kMaxParallelPolicyDataFetches = 2;
-
-}  // namespace
-
-ComponentCloudPolicyUpdater::ComponentCloudPolicyUpdater(
-    scoped_refptr<base::SequencedTaskRunner> task_runner,
-    scoped_ptr<ExternalPolicyDataFetcher> external_policy_data_fetcher,
-    ComponentCloudPolicyStore* store)
-    : store_(store),
-      external_policy_data_updater_(task_runner,
-                                    external_policy_data_fetcher.Pass(),
-                                    kMaxParallelPolicyDataFetches) {
-}
-
-ComponentCloudPolicyUpdater::~ComponentCloudPolicyUpdater() {
-}
-
-void ComponentCloudPolicyUpdater::UpdateExternalPolicy(
-    scoped_ptr<em::PolicyFetchResponse> response) {
-  // Keep a serialized copy of |response|, to cache it later.
-  // The policy is also rejected if it exceeds the maximum size.
-  std::string serialized_response;
-  if (!response->SerializeToString(&serialized_response) ||
-      serialized_response.size() > kPolicyProtoMaxSize) {
-    return;
-  }
-
-  // Validate the policy before doing anything else.
-  PolicyNamespace ns;
-  em::ExternalPolicyData data;
-  if (!store_->ValidatePolicy(response.Pass(), &ns, &data)) {
-    LOG(ERROR) << "Failed to validate component policy fetched from DMServer";
-    return;
-  }
-
-  // Maybe the data for this hash has already been downloaded and cached.
-  const std::string& cached_hash = store_->GetCachedHash(ns);
-  if (!cached_hash.empty() && data.secure_hash() == cached_hash)
-    return;
-
-  // TODO(joaodasilva): implement the other two auth methods.
-  if (data.download_auth_method() != em::ExternalPolicyData::NONE)
-    return;
-
-  const std::string key = NamespaceToKey(ns);
-
-  if (data.download_url().empty() || !data.has_secure_hash()) {
-    // If there is no policy for this component or the policy has been removed,
-    // cancel any existing request to fetch policy for this component.
-    external_policy_data_updater_.CancelExternalDataFetch(key);
-
-    // Delete any existing policy for this component.
-    store_->Delete(ns);
-  } else {
-    // Make a request to fetch policy for this component. If another fetch
-    // request is already pending for the component, it will be canceled.
-    external_policy_data_updater_.FetchExternalData(
-        key,
-        ExternalPolicyDataUpdater::Request(data.download_url(),
-                                           data.secure_hash(),
-                                           kPolicyDataMaxSize),
-        base::Bind(&ComponentCloudPolicyStore::Store, base::Unretained(store_),
-                   ns,
-                   serialized_response,
-                   data.secure_hash()));
-  }
-}
-
-void ComponentCloudPolicyUpdater::CancelUpdate(const PolicyNamespace& ns) {
-  external_policy_data_updater_.CancelExternalDataFetch(NamespaceToKey(ns));
-}
-
-std::string ComponentCloudPolicyUpdater::NamespaceToKey(
-    const PolicyNamespace& ns) {
-  const std::string domain = base::IntToString(ns.domain);
-  const std::string size = base::IntToString(domain.size());
-  return size + ":" + domain + ":" + ns.component_id;
-}
-
-}  // namespace policy