| // Copyright 2021 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 "storage/browser/quota/storage_policy_observer.h" |
| |
| #include <utility> |
| |
| #include "base/task/post_task.h" |
| #include "url/origin.h" |
| |
| namespace storage { |
| |
| // A helper class that lives on the IO thread and registers with |
| // SpecialStoragePolicy. It bounces back any OnPolicyChanged messages |
| // to the StoragePolicyObserver on the provided `reply_task_runner`. |
| class StoragePolicyObserverIOThread |
| : public storage::SpecialStoragePolicy::Observer { |
| public: |
| StoragePolicyObserverIOThread( |
| scoped_refptr<base::SequencedTaskRunner> reply_task_runner, |
| scoped_refptr<storage::SpecialStoragePolicy> storage_policy, |
| base::WeakPtr<StoragePolicyObserver> observer) |
| : reply_task_runner_(std::move(reply_task_runner)), |
| storage_policy_(std::move(storage_policy)), |
| observer_(std::move(observer)) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| storage_policy_->AddObserver(this); |
| } |
| |
| ~StoragePolicyObserverIOThread() override { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| storage_policy_->RemoveObserver(this); |
| } |
| |
| // storage::SpecialStoragePolicy::Observer implementation: |
| void OnPolicyChanged() override { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| reply_task_runner_->PostTask( |
| FROM_HERE, |
| base::BindOnce(&StoragePolicyObserver::OnPolicyChanged, observer_)); |
| } |
| |
| private: |
| scoped_refptr<base::SequencedTaskRunner> reply_task_runner_; |
| scoped_refptr<storage::SpecialStoragePolicy> storage_policy_; |
| |
| SEQUENCE_CHECKER(sequence_checker_); |
| base::WeakPtr<StoragePolicyObserver> observer_; |
| }; |
| |
| StoragePolicyObserver::StoragePolicyObserver( |
| ApplyPolicyUpdatesCallback callback, |
| scoped_refptr<base::SequencedTaskRunner> io_task_runner, |
| scoped_refptr<storage::SpecialStoragePolicy> storage_policy) |
| : callback_(callback), storage_policy_(std::move(storage_policy)) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| if (!storage_policy_) |
| return; |
| |
| storage_policy_observer_ = base::SequenceBound<StoragePolicyObserverIOThread>( |
| std::move(io_task_runner), base::SequencedTaskRunnerHandle::Get(), |
| storage_policy_, weak_factory_.GetWeakPtr()); |
| } |
| |
| StoragePolicyObserver::~StoragePolicyObserver() { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| } |
| |
| void StoragePolicyObserver::StartTrackingOrigin(const url::Origin& origin) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| |
| // If the origin exists, emplace fails, and its state is unchanged. |
| const GURL origin_url = GURL(origin.Serialize()); |
| origin_state_.emplace(origin_url, OriginState()); |
| |
| OnPolicyChanged(); |
| } |
| |
| void StoragePolicyObserver::StopTrackingOrigin(const url::Origin& origin) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| const GURL origin_url = GURL(origin.Serialize()); |
| origin_state_.erase(origin_url); |
| } |
| |
| void StoragePolicyObserver::OnPolicyChanged() { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| |
| std::vector<storage::mojom::StoragePolicyUpdatePtr> policy_updates; |
| for (auto& entry : origin_state_) { |
| const GURL& origin = entry.first; |
| OriginState& state = entry.second; |
| state.should_purge_on_shutdown = ShouldPurgeOnShutdown(origin); |
| |
| if (state.should_purge_on_shutdown != state.will_purge_on_shutdown) { |
| state.will_purge_on_shutdown = state.should_purge_on_shutdown; |
| policy_updates.emplace_back(storage::mojom::StoragePolicyUpdate::New( |
| url::Origin::Create(origin), state.should_purge_on_shutdown)); |
| } |
| } |
| if (policy_updates.empty()) |
| return; |
| callback_.Run(std::move(policy_updates)); |
| } |
| |
| bool StoragePolicyObserver::ShouldPurgeOnShutdownForTesting( |
| const url::Origin& origin) { |
| const GURL origin_url = GURL(origin.Serialize()); |
| return ShouldPurgeOnShutdown(origin_url); |
| } |
| |
| bool StoragePolicyObserver::ShouldPurgeOnShutdown(const GURL& origin) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| if (!storage_policy_) |
| return false; |
| if (!storage_policy_->IsStorageSessionOnly(origin)) |
| return false; |
| if (storage_policy_->IsStorageProtected(origin)) |
| return false; |
| return true; |
| } |
| |
| } // namespace storage |