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// 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 NET_DNS_PUBLIC_DNS_OVER_HTTPS_CONFIG_H_
#define NET_DNS_PUBLIC_DNS_OVER_HTTPS_CONFIG_H_
#include <string>
#include <vector>
#include "base/strings/string_piece.h"
#include "base/values.h"
#include "net/base/net_export.h"
#include "net/dns/public/dns_over_https_server_config.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
namespace net {
// Represents a collection of DnsOverHttpsServerConfig. The string
// representation is either a JSON object or a whitespace-separated
// list of DoH URI templates.
// The Value representation is a list of dictionaries.
class NET_EXPORT DnsOverHttpsConfig {
public:
DnsOverHttpsConfig();
~DnsOverHttpsConfig();
DnsOverHttpsConfig(const DnsOverHttpsConfig& other);
DnsOverHttpsConfig& operator=(const DnsOverHttpsConfig& other);
DnsOverHttpsConfig(DnsOverHttpsConfig&& other);
DnsOverHttpsConfig& operator=(DnsOverHttpsConfig&& other);
explicit DnsOverHttpsConfig(std::vector<DnsOverHttpsServerConfig> servers);
// Constructs a Config from URI templates of zero or more servers.
// Returns `nullopt` if any string is invalid.
static absl::optional<DnsOverHttpsConfig> FromTemplatesForTesting(
std::vector<std::string> servers);
// Constructs a Config from its text form if valid. Returns `nullopt` if the
// input is empty or invalid (even partly invalid).
static absl::optional<DnsOverHttpsConfig> FromString(
base::StringPiece doh_config);
// Constructs a DnsOverHttpsConfig from its text form, skipping any invalid
// templates in the whitespace-separated form. The result may be empty.
static DnsOverHttpsConfig FromStringLax(base::StringPiece doh_config);
bool operator==(const DnsOverHttpsConfig& other) const;
// The servers that comprise this config. May be empty.
const std::vector<DnsOverHttpsServerConfig>& servers() const {
return servers_;
}
// Inverse of FromString(). Uses the JSON representation if necessary.
std::string ToString() const;
// Encodes the config as a Value. Used to produce the JSON representation.
base::Value::Dict ToValue() const;
private:
// Constructs a Config from URI templates of zero or more servers.
// Returns `nullopt` if any string is invalid.
static absl::optional<DnsOverHttpsConfig> FromTemplates(
std::vector<std::string> servers);
std::vector<DnsOverHttpsServerConfig> servers_;
};
} // namespace net
#endif // NET_DNS_PUBLIC_DNS_OVER_HTTPS_CONFIG_H_
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