MCQuery.java

/*
 * ATLauncher - https://github.com/ATLauncher/ATLauncher
 * Copyright (C) 2013 ATLauncher
 *
 * 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 <http://www.gnu.org/licenses/>.
 */
package com.atlauncher.utils;

import de.zh32.pingtest.QueryVersion;
import de.zh32.pingtest.ServerListPing14;
import de.zh32.pingtest.ServerListPing16;
import de.zh32.pingtest.ServerListPing17;
import de.zh32.pingtest.ServerListPing17.StatusResponse;
import de.zh32.pingtest.ServerListPingB18;

import java.net.InetSocketAddress;

public class MCQuery {
    public static QueryVersion getMinecraftServerQueryVersion(String host, int port) {
        InetSocketAddress inetSocketAddress = new InetSocketAddress(host, port);

        try {
            ServerListPing16 ping16 = new ServerListPing16();
            ping16.setAddress(inetSocketAddress);
            ping16.fetchData();
            return QueryVersion.mc16;
        } catch (Exception ex) {
        }

        try {
            ServerListPing14 ping14 = new ServerListPing14();
            ping14.setAddress(inetSocketAddress);
            ping14.fetchData();
            return QueryVersion.mc14;
        } catch (Exception ex) {
        }

        try {
            ServerListPingB18 pingb18 = new ServerListPingB18();
            pingb18.setAddress(inetSocketAddress);
            pingb18.fetchData();
            return QueryVersion.mc18b;
        } catch (Exception ex) {
        }

        // 1.7 must be queried last because if not, the rest of the checks will ALWAYS fail for some
        // reason of which I'm not sure of yet
        try {
            ServerListPing17 ping17 = new ServerListPing17();
            ping17.setAddress(inetSocketAddress);
            ping17.fetchData();
            return QueryVersion.mc17;
        } catch (Exception ex) {
        }

        return null; // Couldn't determine version so return null
    }

    public static int getNumberOfPlayers(String host, int port, QueryVersion qv) {
        InetSocketAddress inetSocketAddress = new InetSocketAddress(host, port);

        switch (qv) {
            case mc14:
                try {
                    ServerListPing14 ping14 = new ServerListPing14();
                    ping14.setAddress(inetSocketAddress);
                    ping14.fetchData();
                    return ping14.getPlayersOnline();
                } catch (Exception ex) {
                }
                return -1; // Server not reachable so send -1 for offline
            case mc16:
                try {
                    ServerListPing16 ping16 = new ServerListPing16();
                    ping16.setAddress(inetSocketAddress);
                    ping16.fetchData();
                    return ping16.getPlayersOnline();
                } catch (Exception ex) {
                }
                return -1; // Server not reachable so send -1 for offline
            case mc17:
                try {
                    ServerListPing17 ping17 = new ServerListPing17();
                    ping17.setAddress(inetSocketAddress);
                    StatusResponse response = ping17.fetchData();
                    return response.getPlayers().getOnline();
                } catch (Exception ex) {
                }
                return -1; // Server not reachable so send -1 for offline
            case mc18b:
                try {
                    ServerListPingB18 pingb18 = new ServerListPingB18();
                    pingb18.setAddress(inetSocketAddress);
                    pingb18.fetchData();
                    return pingb18.getPlayersOnline();
                } catch (Exception ex) {
                }
                return -1; // Server not reachable so send -1 for offline
            default:
                return -1; // Meaning server unreachable since there was no match to the qv
        }
    }
}