Java tutorial
package io.github.apfelcreme.Guilds; import com.google.common.collect.ImmutableList; import org.json.simple.JSONArray; import org.json.simple.JSONObject; import org.json.simple.parser.JSONParser; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.URL; import java.nio.ByteBuffer; import java.util.*; import java.util.concurrent.Callable; /** * Guilds * Copyright (C) 2015 Lord36 aka Apfelcreme * <p/> * 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. * <p/> * 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. * <p/> * You should have received a copy of the GNU General Public License along with * this program; if not, see <http://www.gnu.org/licenses/>. * * @author Lord36 aka Apfelcreme on 25.04.2015. * @author evilmidget38 * <p/> * http://forums.bukkit.org/threads/250926/ * <p/> * https://gist.github.com/evilmidget38/26d70114b834f71fb3b4 */ public class UUIDFetcher implements Callable<Map<String, UUID>> { private static final double PROFILES_PER_REQUEST = 100; private static final String PROFILE_URL = "https://api.mojang.com/profiles/minecraft"; private final JSONParser jsonParser = new JSONParser(); private final List<String> names; private final boolean rateLimiting; public UUIDFetcher(List<String> names, boolean rateLimiting) { this.names = ImmutableList.copyOf(names); this.rateLimiting = rateLimiting; } public UUIDFetcher(List<String> names) { this(names, true); } private static void writeBody(HttpURLConnection connection, String body) throws Exception { OutputStream stream = connection.getOutputStream(); stream.write(body.getBytes()); stream.flush(); stream.close(); } private static HttpURLConnection createConnection() throws Exception { URL url = new URL(PROFILE_URL); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("POST"); connection.setRequestProperty("Content-Type", "application/json"); connection.setUseCaches(false); connection.setDoInput(true); connection.setDoOutput(true); return connection; } private static UUID getUUID(String id) { return UUID.fromString(id.substring(0, 8) + "-" + id.substring(8, 12) + "-" + id.substring(12, 16) + "-" + id.substring(16, 20) + "-" + id.substring(20, 32)); } public static byte[] toBytes(UUID uuid) { ByteBuffer byteBuffer = ByteBuffer.wrap(new byte[16]); byteBuffer.putLong(uuid.getMostSignificantBits()); byteBuffer.putLong(uuid.getLeastSignificantBits()); return byteBuffer.array(); } public static UUID fromBytes(byte[] array) { if (array.length != 16) { throw new IllegalArgumentException("Illegal byte array length: " + array.length); } ByteBuffer byteBuffer = ByteBuffer.wrap(array); long mostSignificant = byteBuffer.getLong(); long leastSignificant = byteBuffer.getLong(); return new UUID(mostSignificant, leastSignificant); } public static UUID getUUIDOf(String name) throws Exception { return new UUIDFetcher(Arrays.asList(name)).call().get(name); } public static UUID getUUIDOfThrottled(String name) throws Exception { return new UUIDFetcher(Arrays.asList(name), true).call().get(name); } public Map<String, UUID> call() throws Exception { Map<String, UUID> uuidMap = new HashMap<String, UUID>(); int requests = (int) Math.ceil(names.size() / PROFILES_PER_REQUEST); for (int i = 0; i < requests; i++) { HttpURLConnection connection = createConnection(); String body = JSONArray.toJSONString(names.subList(i * 100, Math.min((i + 1) * 100, names.size()))); writeBody(connection, body); JSONArray array = (JSONArray) jsonParser.parse(new InputStreamReader(connection.getInputStream())); for (Object profile : array) { JSONObject jsonProfile = (JSONObject) profile; String id = (String) jsonProfile.get("id"); String name = (String) jsonProfile.get("name"); UUID uuid = UUIDFetcher.getUUID(id); uuidMap.put(name, uuid); } if (rateLimiting && i != requests - 1) { Thread.sleep(10L); } } return uuidMap; } }