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// Copyright (c) 2006-2008 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.
// This file supports network stack independent notification of progress
// towards resolving a hostname.
// The observer class supports exactly one active (Add'ed) instance, and in
// typical usage, that observer will be Add'ed during process startup, and
// Remove'd during process termination.
#ifndef NET_BASE_DNS_RESOLUTION_OBSERVER_H_
#define NET_BASE_DNS_RESOLUTION_OBSERVER_H_
#include <string>
#include "net/base/host_resolver.h"
class GURL;
namespace net {
// TODO(eroman): Move this interface to HostResolver::Observer.
class DnsResolutionObserver {
public:
virtual ~DnsResolutionObserver() {}
// For each OnStartResolution() notification, there should be a later
// OnFinishResolutionWithStatus() indicating completion of the resolution
// activity.
// Related pairs of notification will arrive with matching id values.
// A caller may use the id values to match up these asynchronous calls
// from among a larger call stream.
virtual void OnStartResolution(int id,
const HostResolver::RequestInfo& info) = 0;
virtual void OnFinishResolutionWithStatus(
int id,
bool was_resolved,
const HostResolver::RequestInfo& info) = 0;
};
} // namspace net
#endif // NET_BASE_DNS_RESOLUTION_OBSERVER_H_
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