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88 lines
2.0 KiB
C++
88 lines
2.0 KiB
C++
#include "web/Resolver.hpp"
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#include "util/Assert.hpp"
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#include <boost/asio/ip/address.hpp>
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#include <boost/asio/ip/tcp.hpp>
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#include <sstream>
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#include <string>
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#include <string_view>
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#include <utility>
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#include <vector>
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namespace asio = boost::asio;
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namespace web {
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namespace {
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// Check if the hostname is an IP address or a subnet.
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bool
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isAddress(std::string_view hostname)
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{
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boost::system::error_code ec;
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asio::ip::make_address(hostname, ec);
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if (ec == boost::system::errc::success) {
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return true;
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}
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asio::ip::make_network_v4(hostname, ec);
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if (ec == boost::system::errc::success) {
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return true;
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}
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asio::ip::make_network_v6(hostname, ec);
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return ec == boost::system::errc::success;
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}
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std::string
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toString(auto const& endpoint)
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{
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std::stringstream ss;
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ss << endpoint;
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return ss.str();
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}
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} // namespace
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std::vector<std::string>
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Resolver::resolve(std::string_view hostname, std::string_view service)
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{
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ASSERT(not service.empty(), "Service is unspecified. Use `resolve(hostname)` instead.");
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if (isAddress(hostname))
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return {std::string(hostname) + ':' + std::string(service)};
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std::vector<std::string> endpoints;
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for (auto const& endpoint : doResolve(hostname, service))
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endpoints.push_back(toString(endpoint));
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return endpoints;
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}
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std::vector<std::string>
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Resolver::resolve(std::string_view hostname)
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{
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if (isAddress(hostname))
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return {std::string(hostname)};
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std::vector<std::string> endpoints;
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for (auto const& endpoint : doResolve(hostname, ""))
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endpoints.push_back(endpoint.address().to_string());
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return endpoints;
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}
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std::vector<boost::asio::ip::tcp::endpoint>
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Resolver::doResolve(std::string_view hostname, std::string_view service)
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{
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std::vector<boost::asio::ip::tcp::endpoint> endpoints;
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for (auto&& endpoint : resolver_.resolve(hostname, service))
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endpoints.push_back(std::move(endpoint));
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return endpoints;
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}
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} // namespace web
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