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80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of clio: https://github.com/XRPLF/clio
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Copyright (c) 2023, the clio developers.
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#pragma once
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#include <boost/asio.hpp>
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#include <boost/asio/io_context.hpp>
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#include <boost/asio/ip/tcp.hpp>
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#include <concepts>
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#include <string>
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#include <string_view>
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#include <vector>
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namespace web {
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/**
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* @brief The requirements of a resolver
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*/
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template <typename T>
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concept SomeResolver = requires(T t) {
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std::is_default_constructible_v<T>;
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{ t.resolve(std::string_view{}, std::string_view{}) } -> std::same_as<std::vector<std::string>>;
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{ t.resolve(std::string_view{}) } -> std::same_as<std::vector<std::string>>;
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};
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/**
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* @brief Simple hostnames to IP addresses resolver.
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*/
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class Resolver {
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boost::asio::io_context ioContext_;
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boost::asio::ip::tcp::resolver resolver_{ioContext_};
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public:
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/**
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* @brief Resolve hostname to IP addresses.
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*
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* @throw This method throws an exception when the hostname cannot be resolved.
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*
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* @param hostname Hostname to resolve
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* @return IP addresses of the hostname
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*/
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std::vector<std::string>
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resolve(std::string_view hostname);
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/**
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* @brief Resolve to IP addresses with port.
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*
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* @throw This method throws an exception when the hostname cannot be resolved.
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*
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* @param hostname Hostname to resolve
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* @param service Service to resolve
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* @return IP addresses of the hostname
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*/
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std::vector<std::string>
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resolve(std::string_view hostname, std::string_view service);
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private:
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std::vector<boost::asio::ip::tcp::endpoint>
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doResolve(std::string_view hostname, std::string_view service);
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};
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} // namespace web
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