rcpp_framework/core/net/resolver.h

// This file is originally from Trantor - Resolver.h

// Copyright (c) 2016-2021, Tao An.  All rights reserved.

// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
//   * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//   * Neither the name of Tao An nor the names of other contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#pragma once

#include <memory>
#include "core/loops/event_loop.h"
#include "core/net/inet_address.h"

//make it a reference

class Resolver
{
  public:
    using Callback = std::function<void(const InetAddress&)>;

    static std::shared_ptr<Resolver> newResolver(EventLoop* loop = nullptr, size_t timeout = 60);

    virtual void resolve(const std::string& hostname, const Callback& callback) = 0;

    virtual ~Resolver()
    {
    }

    static bool isCAresUsed();
};