dht_proxy_server.cpp

/*
 *  Copyright (C) 2017-2019 Savoir-faire Linux Inc.
 *  Author: Sébastien Blin <sebastien.blin@savoirfairelinux.com>
 *          Adrien Béraud <adrien.beraud@savoirfairelinux.com>
 *          Vsevolod Ivanov <vsevolod.ivanov@savoirfairelinux.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

#include "dht_proxy_server.h"

#include "default_types.h"
#include "dhtrunner.h"

#include <msgpack.hpp>
#include <json/json.h>

#include <chrono>
#include <functional>
#include <limits>
#include <iostream>

using namespace std::placeholders;

#ifdef OPENDHT_PROXY_HTTP_PARSER_FORK
namespace restinio {
struct custom_http_methods_t
{
    static constexpr restinio::http_method_id_t from_nodejs(int m) noexcept {
        if(m == method_listen.raw_id())
            return method_listen;
        else if(m == method_stats.raw_id())
            return method_stats;
        else if(m == method_sign.raw_id())
            return method_sign;
        else if(m == method_encrypt.raw_id())
            return method_encrypt;
        else
            return restinio::default_http_methods_t::from_nodejs(m);
    }
};
}
#endif

namespace dht {

constexpr char RESP_MSG_DESTINATION_NOT_FOUND[] = "{\"err\":\"No destination found\"}";
constexpr char RESP_MSG_NO_TOKEN[] = "{\"err\":\"No token\"}";
constexpr char RESP_MSG_JSON_NOT_ENABLED[] = "{\"err\":\"JSON not enabled on this instance\"}";
constexpr char RESP_MSG_JSON_INCORRECT[] = "{\"err:\":\"Incorrect JSON\"}";
constexpr char RESP_MSG_SERVICE_UNAVAILABLE[] = "{\"err\":\"Incorrect DhtRunner\"}";
constexpr char RESP_MSG_INTERNAL_SERVER_ERRROR[] = "{\"err\":\"Internal server error\"}";
constexpr char RESP_MSG_MISSING_PARAMS[] = "{\"err\":\"Missing parameters\"}";
constexpr char RESP_MSG_PUT_FAILED[] = "{\"err\":\"Put failed\"}";

constexpr const std::chrono::minutes PRINT_STATS_PERIOD {2};

class opendht_logger_t
{