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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_PRELOADING_PRECONNECT_MANAGER_IMPL_H_
#define CONTENT_BROWSER_PRELOADING_PRECONNECT_MANAGER_IMPL_H_
#include <list>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "base/containers/id_map.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "content/browser/preloading/prefetch/proxy_lookup_client_impl.h"
#include "content/browser/preloading/resolve_host_client_impl.h"
#include "content/public/browser/preconnect_manager.h"
#include "content/public/browser/preconnect_request.h"
#include "content/public/browser/storage_partition_config.h"
#include "net/base/network_anonymization_key.h"
#include "services/network/public/mojom/connection_change_observer_client.mojom.h"
#include "url/gurl.h"
namespace network::mojom {
class NetworkContext;
} // namespace network::mojom
namespace content {
class BrowserContext;
// Stores the status of all preconnects associated with a given |url|.
struct CONTENT_EXPORT PreresolveInfo {
PreresolveInfo(const GURL& url, size_t count);
PreresolveInfo(const PreresolveInfo&) = delete;
PreresolveInfo& operator=(const PreresolveInfo&) = delete;
~PreresolveInfo();
bool is_done() const { return queued_count == 0 && inflight_count == 0; }
GURL url;
size_t queued_count;
size_t inflight_count = 0;
bool was_canceled = false;
std::unique_ptr<PreconnectStats> stats;
};
// Stores all data need for running a preresolve and a subsequent optional
// preconnect for a |url|.
struct CONTENT_EXPORT PreresolveJob {
PreresolveJob(
const GURL& url,
int num_sockets,
bool allow_credentials,
net::NetworkAnonymizationKey network_anonymization_key,
net::NetworkTrafficAnnotationTag traffic_annotation_tag,
std::optional<content::StoragePartitionConfig> storage_partition_config,
std::optional<net::ConnectionKeepAliveConfig> keepalive_config,
mojo::PendingRemote<network::mojom::ConnectionChangeObserverClient>
connection_change_observer_client,
PreresolveInfo* info);
PreresolveJob(const PreresolveJob&) = delete;
PreresolveJob& operator=(const PreresolveJob&) = delete;
PreresolveJob(content::PreconnectRequest preconnect_request,
PreresolveInfo* info,
net::NetworkTrafficAnnotationTag traffic_annotation_tag);
PreresolveJob(PreresolveJob&& other);
~PreresolveJob();
bool need_preconnect() const {
return num_sockets > 0 && !(info && info->was_canceled);
}
GURL url;
int num_sockets;
bool allow_credentials;
net::NetworkAnonymizationKey network_anonymization_key;
net::NetworkTrafficAnnotationTag traffic_annotation_tag;
// The default for the profile is used if this is absent.
std::optional<content::StoragePartitionConfig> storage_partition_config;
std::optional<net::ConnectionKeepAliveConfig> keepalive_config;
mojo::PendingRemote<network::mojom::ConnectionChangeObserverClient>
connection_change_observer_client;
// Raw pointer usage is fine here because even though PreresolveJob can
// outlive PreresolveInfo. It's only accessed on PreconnectManager class
// context and PreresolveInfo lifetime is tied to PreconnectManager.
// May be equal to nullptr in case of detached job.
raw_ptr<PreresolveInfo, DanglingUntriaged> info;
std::unique_ptr<ResolveHostClientImpl> resolve_host_client;
std::unique_ptr<ProxyLookupClientImpl> proxy_lookup_client;
base::TimeTicks creation_time;
};
class CONTENT_EXPORT PreconnectManagerImpl : public PreconnectManager {
public:
static const size_t kMaxInflightPreresolves = 3;
PreconnectManagerImpl(base::WeakPtr<PreconnectManager::Delegate> delegate,
content::BrowserContext* browser_context);
PreconnectManagerImpl(const PreconnectManagerImpl&) = delete;
PreconnectManagerImpl& operator=(const PreconnectManagerImpl&) = delete;
~PreconnectManagerImpl() override;
void Start(const GURL& url,
std::vector<content::PreconnectRequest> requests,
net::NetworkTrafficAnnotationTag traffic_annotation) override;
void StartPreresolveHost(
const GURL& url,
const net::NetworkAnonymizationKey& network_anonymization_key,
net::NetworkTrafficAnnotationTag traffic_annotation,
const content::StoragePartitionConfig* storage_partition_config) override;
void StartPreresolveHosts(
const std::vector<GURL>& urls,
const net::NetworkAnonymizationKey& network_anonymization_key,
net::NetworkTrafficAnnotationTag traffic_annotation,
const content::StoragePartitionConfig* storage_partition_config) override;
void StartPreconnectUrl(
const GURL& url,
bool allow_credentials,
net::NetworkAnonymizationKey network_anonymization_key,
net::NetworkTrafficAnnotationTag traffic_annotation,
const content::StoragePartitionConfig* storage_partition_config,
std::optional<net::ConnectionKeepAliveConfig> keepalive_config,
mojo::PendingRemote<network::mojom::ConnectionChangeObserverClient>
connection_change_observer_client) override;
void Stop(const GURL& url) override;
base::WeakPtr<PreconnectManager> GetWeakPtr() override;
void SetNetworkContextForTesting(
network::mojom::NetworkContext* network_context) override;
void SetObserverForTesting(Observer* observer) override;
private:
using PreresolveJobMap = base::IDMap<std::unique_ptr<PreresolveJob>>;
using PreresolveJobId = PreresolveJobMap::KeyType;
friend class PreconnectManagerImplTest;
void PreconnectUrl(
const GURL& url,
int num_sockets,
bool allow_credentials,
const net::NetworkAnonymizationKey& network_anonymization_key,
const net::NetworkTrafficAnnotationTag& traffic_annotation,
const content::StoragePartitionConfig* storage_partition_config,
std::optional<net::ConnectionKeepAliveConfig> keepalive_config,
mojo::PendingRemote<network::mojom::ConnectionChangeObserverClient>
connection_change_observer_client) const;
std::unique_ptr<ResolveHostClientImpl> PreresolveUrl(
const GURL& url,
const net::NetworkAnonymizationKey& network_anonymization_key,
const content::StoragePartitionConfig* storage_partition_config,
ResolveHostCallback callback) const;
std::unique_ptr<ProxyLookupClientImpl> LookupProxyForUrl(
const GURL& url,
const net::NetworkAnonymizationKey& network_anonymization_key,
const content::StoragePartitionConfig* storage_partition_config,
ProxyLookupClientImpl::ProxyLookupCallback callback) const;
void TryToLaunchPreresolveJobs();
void OnPreresolveFinished(PreresolveJobId job_id, bool success);
void OnProxyLookupFinished(PreresolveJobId job_id, bool success);
void FinishPreresolveJob(PreresolveJobId job_id, bool success);
void AllPreresolvesForUrlFinished(PreresolveInfo* info);
// NOTE: Returns a non-null pointer outside of unittesting contexts.
network::mojom::NetworkContext* GetNetworkContext(
const content::StoragePartitionConfig* storage_partition_config) const;
base::WeakPtr<Delegate> delegate_;
const raw_ptr<content::BrowserContext> browser_context_;
std::list<PreresolveJobId> queued_jobs_;
PreresolveJobMap preresolve_jobs_;
std::map<GURL, std::unique_ptr<PreresolveInfo>> preresolve_info_;
size_t inflight_preresolves_count_ = 0;
// Only used in tests.
raw_ptr<network::mojom::NetworkContext> network_context_ = nullptr;
raw_ptr<Observer> observer_ = nullptr;
base::WeakPtrFactory<PreconnectManagerImpl> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_PRELOADING_PRECONNECT_MANAGER_IMPL_H_
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