chromium/components/cronet/stale_host_resolver.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_CRONET_STALE_HOST_RESOLVER_H_
#define COMPONENTS_CRONET_STALE_HOST_RESOLVER_H_

#include <memory>
#include <optional>
#include <unordered_map>

#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/default_tick_clock.h"
#include "base/values.h"
#include "net/base/completion_once_callback.h"
#include "net/base/network_anonymization_key.h"
#include "net/dns/host_resolver.h"
#include "net/log/net_log_with_source.h"
#include "url/scheme_host_port.h"

namespace base {
class TickClock;
}  // namespace base

namespace net {
class ContextHostResolver;
}  // namespace net

namespace cronet {
namespace {
class StaleHostResolverTest;
}  // namespace

// A HostResolver that wraps a ContextHostResolver and uses it to make requests,
// but "impatiently" returns stale data (if available and usable) after a delay,
// to reduce DNS latency at the expense of accuracy.
class StaleHostResolver : public net::HostResolver { … };

}  // namespace cronet

#endif  // COMPONENTS_CRONET_STALE_HOST_RESOLVER_H_