1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
// Copyright 2022 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_PREFETCH_PREFETCH_DNS_PROBER_H_
#define CONTENT_BROWSER_PRELOADING_PREFETCH_PREFETCH_DNS_PROBER_H_
#include <optional>
#include <vector>
#include "base/functional/callback.h"
#include "net/base/address_list.h"
#include "net/base/host_port_pair.h"
#include "net/dns/public/host_resolver_results.h"
#include "net/dns/public/resolve_error_info.h"
#include "services/network/public/mojom/host_resolver.mojom.h"
namespace content {
// PrefetchDNSProber is a simple ResolveHostClient implementation that
// performs DNS resolution and invokes a callback upon completion.
class PrefetchDNSProber : public network::mojom::ResolveHostClient {
public:
using OnDNSResultsCallback = base::OnceCallback<
void(int, const std::optional<net::AddressList>& resolved_addresses)>;
explicit PrefetchDNSProber(OnDNSResultsCallback callback);
~PrefetchDNSProber() override;
// network::mojom::ResolveHostClient:
void OnTextResults(const std::vector<std::string>&) override {}
void OnHostnameResults(const std::vector<net::HostPortPair>&) override {}
void OnComplete(int32_t error,
const net::ResolveErrorInfo& resolve_error_info,
const std::optional<net::AddressList>& resolved_addresses,
const std::optional<net::HostResolverEndpointResults>&
endpoint_results_with_metadata) override;
private:
OnDNSResultsCallback callback_;
};
} // namespace content
#endif // CONTENT_BROWSER_PRELOADING_PREFETCH_PREFETCH_DNS_PROBER_H_
|
