dht_proxy_client.cpp

/*
 *  Copyright (C) 2016-2018 Savoir-faire Linux Inc.
 *  Author: Sébastien Blin <sebastien.blin@savoirfairelinux.com>
 *          Adrien Béraud <adrien.beraud@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/>.
 */

#if OPENDHT_PROXY_CLIENT

#include "dht_proxy_client.h"

#include <chrono>
#include <json/json.h>
#include <restbed>
#include <vector>

#include "dhtrunner.h"
#include "op_cache.h"

constexpr const char* const HTTP_PROTO {"http://"};

namespace dht {

struct DhtProxyClient::Listener
{
    ValueCache cache;
    ValueCallback cb;
    Value::Filter filter;
    Sp<restbed::Request> req;
    std::thread thread;
    unsigned callbackId;
    Sp<bool> isCanceledViaClose;
    Sp<unsigned> pushNotifToken; // NOTE: unused if not using push notifications
    Listener(ValueCache&& c, const Sp<restbed::Request>& r, Value::Filter&& f, unsigned cid)
        : cache(std::move(c)), filter(std::move(f)), req(r), callbackId(cid), isCanceledViaClose(std::make_shared<bool>(false))
    {}
};

struct DhtProxyClient::ProxySearch {
    SearchCache ops {};
    std::map<size_t, Listener> listeners {};
};

DhtProxyClient::DhtProxyClient() : scheduler(DHT_LOG) {}

DhtProxyClient::DhtProxyClient(std::function<void()> signal, const std::string& serverHost, const std::string& pushClientId)
: serverHost_(serverHost), pushClientId_(pushClientId), scheduler(DHT_LOG), loopSignal_(signal)
{
    if (!serverHost_.empty())
        startProxy();
}

void
DhtProxyClient::confirmProxy()
{
    if (serverHost_.empty()) return;
    getConnectivityStatus();
}