39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/actor/actor.h"
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#include "td/actor/PromiseFuture.h"
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#include "td/utils/port/IPAddress.h"
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#include "td/utils/Status.h"
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#include <unordered_map>
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namespace td {
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class GetHostByNameActor final : public td::Actor {
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public:
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explicit GetHostByNameActor(int32 ok_timeout = CACHE_TIME, int32 error_timeout = ERROR_CACHE_TIME);
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void run(std::string host, int port, td::Promise<td::IPAddress> promise);
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private:
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struct Value {
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Result<td::IPAddress> ip;
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double expire_at;
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Value(Result<td::IPAddress> ip, double expire_at) : ip(std::move(ip)), expire_at(expire_at) {
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}
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};
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std::unordered_map<string, Value> cache_;
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static constexpr int32 CACHE_TIME = 60 * 29; // 29 minutes
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static constexpr int32 ERROR_CACHE_TIME = 60 * 5; // 5 minutes
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int32 ok_timeout_;
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int32 error_timeout_;
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Result<td::IPAddress> load_ip(string host, int port) TD_WARN_UNUSED_RESULT;
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};
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} // namespace td
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