Use nms to get the uuid

src/me/libraryaddict/disguise/utilities/DisguiseUtilities.java

@@ -4,7 +4,6 @@ import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
@@ -285,10 +284,9 @@ public class DisguiseUtilities {
                 Bukkit.getScheduler().scheduleAsyncDelayedTask(libsDisguises, new Runnable() {
                     public void run() {
                         try {
-                            UUIDFetcher fetcher = new UUIDFetcher(Arrays.asList(playerName));
+                            Object gameprofile = ReflectionManager.grabUUID(ReflectionManager.getGameProfile(null, playerName,
-                            HashMap<String, UUID> map = fetcher.call();
+                                    false));
-                            if (map.containsKey(playerName)) {
+                            if (gameprofile != null) {
-                                Object gameprofile = ReflectionManager.getGameProfile(map.get(playerName), playerName);
                                 final Object gameProfile = ReflectionManager.grabSkullBlob(gameprofile);
                                 Bukkit.getScheduler().scheduleSyncDelayedTask(libsDisguises, new Runnable() {
                                     public void run() {

src/me/libraryaddict/disguise/utilities/ReflectionManager.java

@@ -218,11 +218,15 @@ public class ReflectionManager {
     }
 
     public static Object getGameProfile(UUID uuid, String playerName) {
+        return getGameProfile(uuid, playerName, true);
+    }
+
+    public static Object getGameProfile(UUID uuid, String playerName, boolean createUuid) {
         try {
             try {
                 return Class.forName("net.minecraft.util.com.mojang.authlib.GameProfile")
                         .getConstructor(UUID.class, String.class)
-                        .newInstance(uuid != null ? uuid : UUID.randomUUID(), playerName);
+                        .newInstance(uuid != null || !createUuid ? uuid : UUID.randomUUID(), playerName);
             } catch (NoSuchMethodException ex) {
                 return Class.forName("net.minecraft.util.com.mojang.authlib.GameProfile")
                         .getConstructor(String.class, String.class).newInstance(uuid != null ? uuid.toString() : "", playerName);
@@ -315,6 +319,22 @@ public class ReflectionManager {
         return null;
     }
 
+    public static Object grabUUID(Object gameProfile) {
+        try {
+            Object minecraftServer = getNmsClass("MinecraftServer").getMethod("getServer").invoke(null);
+            for (Method method : getNmsClass("MinecraftServer").getMethods()) {
+                if (method.getReturnType().getSimpleName().equals("MinecraftSessionService")) {
+                    Object session = method.invoke(minecraftServer);
+                    return session.getClass().getMethod("hasJoinedServer", gameProfile.getClass(), String.class)
+                            .invoke(session, gameProfile, null);
+                }
+            }
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+        return null;
+    }
+
     public static void setAllowSleep(Player player) {
         try {
             Object nmsEntity = getNmsEntity(player);

src/me/libraryaddict/disguise/utilities/UUIDFetcher.java

@@ -1,83 +0,0 @@
-package me.libraryaddict.disguise.utilities;
-
-import com.google.common.collect.ImmutableList;
-import org.json.simple.JSONArray;
-import org.json.simple.JSONObject;
-import org.json.simple.JSONValue;
-import org.json.simple.parser.JSONParser;
-
-import java.io.DataOutputStream;
-import java.io.InputStreamReader;
-import java.net.HttpURLConnection;
-import java.net.URL;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.UUID;
-import java.util.concurrent.Callable;
-
-public class UUIDFetcher implements Callable<HashMap<String, UUID>> {
-    private static final String AGENT = "minecraft";
-    private static final int MAX_SEARCH = 100;
-    private static final String PROFILE_URL = "https://api.mojang.com/profiles/page/";
-    @SuppressWarnings("unchecked")
-    private static String buildBody(List<String> names) {
-        List<JSONObject> lookups = new ArrayList<JSONObject>();
-        for (String name : names) {
-            JSONObject obj = new JSONObject();
-            obj.put("name", name);
-            obj.put("agent", AGENT);
-            lookups.add(obj);
-        }
-        return JSONValue.toJSONString(lookups);
-    }
-    private static HttpURLConnection createConnection(int page) throws Exception {
-        URL url = new URL(PROFILE_URL + page);
-        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 void writeBody(HttpURLConnection connection, String body) throws Exception {
-        DataOutputStream writer = new DataOutputStream(connection.getOutputStream());
-        writer.write(body.getBytes());
-        writer.flush();
-        writer.close();
-    }
-
-    private final JSONParser jsonParser = new JSONParser();
-
-    private final List<String> names;
-
-    public UUIDFetcher(List<String> names) {
-        this.names = ImmutableList.copyOf(names);
-    }
-
-    public HashMap<String, UUID> call() throws Exception {
-        HashMap<String, UUID> uuidMap = new HashMap<String, UUID>();
-        String body = buildBody(names);
-        for (int i = 1; i < MAX_SEARCH; i++) {
-            HttpURLConnection connection = createConnection(i);
-            writeBody(connection, body);
-            JSONObject jsonObject = (JSONObject) jsonParser.parse(new InputStreamReader(connection.getInputStream()));
-            JSONArray array = (JSONArray) jsonObject.get("profiles");
-            Number count = (Number) jsonObject.get("size");
-            if (count.intValue() == 0) {
-                break;
-            }
-            for (Object profile : array) {
-                JSONObject jsonProfile = (JSONObject) profile;
-                String id = (String) jsonProfile.get("id");
-                String name = (String) jsonProfile.get("name");
-                UUID uuid = UUID.fromString(id.substring(0, 8) + "-" + id.substring(8, 12) + "-" + id.substring(12, 16) + "-"
-                        + id.substring(16, 20) + "-" + id.substring(20, 32));
-                uuidMap.put(name, uuid);
-            }
-        }
-        return uuidMap;
-    }
-}