🆕 Added Reset password / Email and chenge username in user settings

Emulator/src/main/java/com/eu/habbo/habbohotel/commands/ChangeNameCommand.java

@@ -1,18 +0,0 @@
-package com.eu.habbo.habbohotel.commands;
-
-import com.eu.habbo.Emulator;
-import com.eu.habbo.habbohotel.gameclients.GameClient;
-import com.eu.habbo.messages.outgoing.users.UserDataComposer;
-
-public class ChangeNameCommand extends Command {
-    public ChangeNameCommand() {
-        super("cmd_changename", Emulator.getTexts().getValue("commands.keys.cmd_changename").split(";"));
-    }
-
-    @Override
-    public boolean handle(GameClient gameClient, String[] params) throws Exception {
-        gameClient.getHabbo().getHabboStats().allowNameChange = !gameClient.getHabbo().getHabboStats().allowNameChange;
-        gameClient.sendResponse(new UserDataComposer(gameClient.getHabbo()));
-        return true;
-    }
-}

Emulator/src/main/java/com/eu/habbo/habbohotel/commands/CommandHandler.java

@@ -184,7 +184,6 @@ public class CommandHandler {
         addCommand(new BlockAlertCommand());
         addCommand(new BotsCommand());
         addCommand(new CalendarCommand());
-        addCommand(new ChangeNameCommand());
         addCommand(new ChatTypeCommand());
         addCommand(new CommandsCommand());
         addCommand(new ControlCommand());

Emulator/src/main/java/com/eu/habbo/networking/gameserver/auth/AuthHttpHandler.java

@@ -38,6 +38,9 @@ public class AuthHttpHandler extends ChannelInboundHandlerAdapter {
     private static final String REFRESH_PATH         = "/api/auth/refresh";
     private static final String SERVER_KEY_PATH      = "/api/auth/server-key";
     private static final String SSO_TOKEN_PATH       = "/api/auth/sso-token";
+    private static final String CHANGE_PASSWORD_PATH = "/api/auth/change-password";
+    private static final String CHANGE_EMAIL_PATH    = "/api/auth/change-email";
+    private static final String CHANGE_USERNAME_PATH = "/api/auth/change-username";
     private static final String HEALTH_PATH          = "/api/health";
 
     private static final Pattern USERNAME_RE = Pattern.compile("^[A-Za-z0-9._-]{3,32}$");
@@ -64,6 +67,9 @@ public class AuthHttpHandler extends ChannelInboundHandlerAdapter {
                 && !path.equals(REFRESH_PATH)
                 && !path.equals(SERVER_KEY_PATH)
                 && !path.equals(SSO_TOKEN_PATH)
+                && !path.equals(CHANGE_PASSWORD_PATH)
+                && !path.equals(CHANGE_EMAIL_PATH)
+                && !path.equals(CHANGE_USERNAME_PATH)
                 && !path.equals(HEALTH_PATH)) {
             super.channelRead(ctx, msg);
             return;
@@ -180,6 +186,18 @@ public class AuthHttpHandler extends ChannelInboundHandlerAdapter {
             handleSsoToken(ctx, req, body, ip);
             return;
         }
+        if (path.equals(CHANGE_PASSWORD_PATH)) {
+            handleChangePassword(ctx, req, body, ip);
+            return;
+        }
+        if (path.equals(CHANGE_EMAIL_PATH)) {
+            handleChangeEmail(ctx, req, body, ip);
+            return;
+        }
+        if (path.equals(CHANGE_USERNAME_PATH)) {
+            handleChangeUsername(ctx, req, body, ip);
+            return;
+        }
 
         String turnstileToken = readString(body, "turnstileToken");
         if (!TurnstileVerifier.verify(turnstileToken, ip)) {
@@ -274,6 +292,517 @@ public class AuthHttpHandler extends ChannelInboundHandlerAdapter {
         sendJson(ctx, req, HttpResponseStatus.OK, res);
     }
 
+    private void handleChangePassword(ChannelHandlerContext ctx, FullHttpRequest req, JsonObject body, String ip) {
+        String authHeader = req.headers().get(HttpHeaderNames.AUTHORIZATION);
+        String bearer = "";
+        if (authHeader != null && authHeader.regionMatches(true, 0, "Bearer ", 0, 7)) {
+            bearer = authHeader.substring(7).trim();
+        }
+
+        int userId = AccessTokenService.verify(bearer);
+        if (userId <= 0) {
+            AuthRateLimiter.recordFailure(ip);
+            sendJson(ctx, req, HttpResponseStatus.UNAUTHORIZED, errorPayload("Not authenticated."));
+            return;
+        }
+
+        String currentPassword = readString(body, "currentPassword");
+        String newPassword     = readString(body, "newPassword");
+        String confirmPassword = readString(body, "confirmPassword");
+
+        if (currentPassword.isEmpty() || newPassword.isEmpty() || confirmPassword.isEmpty()) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("All fields are required."));
+            return;
+        }
+
+        if (currentPassword.length() > 256 || newPassword.length() > 256) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("Password too long."));
+            return;
+        }
+
+        if (!newPassword.equals(confirmPassword)) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("New passwords do not match."));
+            return;
+        }
+
+        if (newPassword.length() < 8) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("Password must be at least 8 characters."));
+            return;
+        }
+
+        if (newPassword.equals(currentPassword)) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("New password must be different from the current password."));
+            return;
+        }
+
+        try (Connection conn = Emulator.getDatabase().getDataSource().getConnection()) {
+            String storedHash = null;
+            String username = null;
+            try (PreparedStatement lookup = conn.prepareStatement(
+                    "SELECT username, password FROM users WHERE id = ? LIMIT 1")) {
+                lookup.setInt(1, userId);
+                try (ResultSet rs = lookup.executeQuery()) {
+                    if (rs.next()) {
+                        username = rs.getString("username");
+                        storedHash = rs.getString("password");
+                    }
+                }
+            }
+
+            if (storedHash == null || storedHash.isEmpty()) {
+                AuthRateLimiter.recordFailure(ip);
+                sendJson(ctx, req, HttpResponseStatus.UNAUTHORIZED, errorPayload("Account not found."));
+                return;
+            }
+
+            if (!checkPassword(currentPassword, storedHash)) {
+                AuthRateLimiter.recordFailure(ip);
+                LOGGER.info("[auth/change-password] current password mismatch for user id={} username='{}'", userId, username);
+                sendJson(ctx, req, HttpResponseStatus.UNAUTHORIZED,
+                        errorPayload("Current password is incorrect."));
+                return;
+            }
+
+            String hashed = BCrypt.hashpw(newPassword, BCrypt.gensalt(12));
+            try (PreparedStatement upd = conn.prepareStatement(
+                    "UPDATE users SET password = ? WHERE id = ? LIMIT 1")) {
+                upd.setString(1, hashed);
+                upd.setInt(2, userId);
+                upd.executeUpdate();
+            }
+
+            AuthRateLimiter.recordSuccess(ip);
+            LOGGER.info("[auth/change-password] password updated for user id={} username='{}' ip='{}'", userId, username, ip);
+
+            JsonObject ok = new JsonObject();
+            ok.addProperty("message", "Password updated successfully.");
+            sendJson(ctx, req, HttpResponseStatus.OK, ok);
+        } catch (Exception e) {
+            LOGGER.error("[auth/change-password] failed for user id=" + userId, e);
+            sendJson(ctx, req, HttpResponseStatus.INTERNAL_SERVER_ERROR, errorPayload("Server error."));
+        }
+    }
+
+    private void handleChangeEmail(ChannelHandlerContext ctx, FullHttpRequest req, JsonObject body, String ip) {
+        String authHeader = req.headers().get(HttpHeaderNames.AUTHORIZATION);
+        String bearer = "";
+        if (authHeader != null && authHeader.regionMatches(true, 0, "Bearer ", 0, 7)) {
+            bearer = authHeader.substring(7).trim();
+        }
+
+        int userId = AccessTokenService.verify(bearer);
+        if (userId <= 0) {
+            AuthRateLimiter.recordFailure(ip);
+            sendJson(ctx, req, HttpResponseStatus.UNAUTHORIZED, errorPayload("Not authenticated."));
+            return;
+        }
+
+        String currentPassword = readString(body, "currentPassword");
+        String newEmail        = readString(body, "newEmail").trim();
+
+        if (currentPassword.isEmpty() || newEmail.isEmpty()) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("All fields are required."));
+            return;
+        }
+
+        if (currentPassword.length() > 256 || newEmail.length() > 254) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("Field too long."));
+            return;
+        }
+
+        if (!EMAIL_RE.matcher(newEmail).matches()) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("Invalid email address."));
+            return;
+        }
+
+        try (Connection conn = Emulator.getDatabase().getDataSource().getConnection()) {
+            String storedHash = null;
+            String username = null;
+            String currentEmail = null;
+            try (PreparedStatement lookup = conn.prepareStatement(
+                    "SELECT username, password, mail FROM users WHERE id = ? LIMIT 1")) {
+                lookup.setInt(1, userId);
+                try (ResultSet rs = lookup.executeQuery()) {
+                    if (rs.next()) {
+                        username = rs.getString("username");
+                        storedHash = rs.getString("password");
+                        currentEmail = rs.getString("mail");
+                    }
+                }
+            }
+
+            if (storedHash == null || storedHash.isEmpty()) {
+                AuthRateLimiter.recordFailure(ip);
+                sendJson(ctx, req, HttpResponseStatus.UNAUTHORIZED, errorPayload("Account not found."));
+                return;
+            }
+
+            if (!checkPassword(currentPassword, storedHash)) {
+                AuthRateLimiter.recordFailure(ip);
+                LOGGER.info("[auth/change-email] password mismatch for user id={} username='{}'", userId, username);
+                sendJson(ctx, req, HttpResponseStatus.UNAUTHORIZED,
+                        errorPayload("Current password is incorrect."));
+                return;
+            }
+
+            if (currentEmail != null && currentEmail.equalsIgnoreCase(newEmail)) {
+                sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                        errorPayload("New email must be different from the current email."));
+                return;
+            }
+
+            try (PreparedStatement check = conn.prepareStatement(
+                    "SELECT id FROM users WHERE mail = ? AND id <> ? LIMIT 1")) {
+                check.setString(1, newEmail);
+                check.setInt(2, userId);
+                try (ResultSet rs = check.executeQuery()) {
+                    if (rs.next()) {
+                        sendJson(ctx, req, HttpResponseStatus.CONFLICT,
+                                errorPayload("That email address is already in use."));
+                        return;
+                    }
+                }
+            }
+
+            try (PreparedStatement upd = conn.prepareStatement(
+                    "UPDATE users SET mail = ? WHERE id = ? LIMIT 1")) {
+                upd.setString(1, newEmail);
+                upd.setInt(2, userId);
+                upd.executeUpdate();
+            }
+
+            if (currentEmail != null && !currentEmail.isEmpty()) AvailabilityCache.invalidateEmail(currentEmail);
+            AvailabilityCache.invalidateEmail(newEmail);
+
+            AuthRateLimiter.recordSuccess(ip);
+            LOGGER.info("[auth/change-email] email updated for user id={} username='{}' ip='{}'", userId, username, ip);
+
+            JsonObject ok = new JsonObject();
+            ok.addProperty("message", "Email updated successfully.");
+            ok.addProperty("email", newEmail);
+            sendJson(ctx, req, HttpResponseStatus.OK, ok);
+        } catch (Exception e) {
+            LOGGER.error("[auth/change-email] failed for user id=" + userId, e);
+            sendJson(ctx, req, HttpResponseStatus.INTERNAL_SERVER_ERROR, errorPayload("Server error."));
+        }
+    }
+
+    private void handleChangeUsername(ChannelHandlerContext ctx, FullHttpRequest req, JsonObject body, String ip) {
+        String authHeader = req.headers().get(HttpHeaderNames.AUTHORIZATION);
+        String bearer = "";
+        if (authHeader != null && authHeader.regionMatches(true, 0, "Bearer ", 0, 7)) {
+            bearer = authHeader.substring(7).trim();
+        }
+
+        int userId = AccessTokenService.verify(bearer);
+        if (userId <= 0) {
+            AuthRateLimiter.recordFailure(ip);
+            sendJson(ctx, req, HttpResponseStatus.UNAUTHORIZED, errorPayload("Not authenticated."));
+            return;
+        }
+
+        String currentPassword = readString(body, "currentPassword");
+        String newUsername     = readString(body, "newUsername").trim();
+
+        if (currentPassword.isEmpty() || newUsername.isEmpty()) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("All fields are required."));
+            return;
+        }
+
+        if (currentPassword.length() > 256) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("Field too long."));
+            return;
+        }
+
+        if (newUsername.length() > 25) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("Username can be at most 25 characters."));
+            return;
+        }
+
+        if (!USERNAME_RE.matcher(newUsername).matches()) {
+            sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                    errorPayload("Username must be 3-25 characters (letters, numbers, . _ -)."));
+            return;
+        }
+
+        long cooldownDays = Math.max(0, Emulator.getConfig().getInt("rename.cooldown_days", 30));
+        long cooldownSeconds = cooldownDays * 86400L;
+
+        try (Connection conn = Emulator.getDatabase().getDataSource().getConnection()) {
+            String storedHash = null;
+            String currentUsername = null;
+            int lastChange = 0;
+            boolean cooldownColumnExists = true;
+
+            try (PreparedStatement lookup = conn.prepareStatement(
+                    "SELECT username, password, last_username_change FROM users WHERE id = ? LIMIT 1")) {
+                lookup.setInt(1, userId);
+                try (ResultSet rs = lookup.executeQuery()) {
+                    if (rs.next()) {
+                        currentUsername = rs.getString("username");
+                        storedHash = rs.getString("password");
+                        lastChange = rs.getInt("last_username_change");
+                    }
+                }
+            } catch (SQLException missingColumn) {
+                cooldownColumnExists = false;
+                LOGGER.warn("[auth/change-username] users.last_username_change column missing — cooldown disabled. Run the migration in config/Database.sql.");
+                try (PreparedStatement lookup = conn.prepareStatement(
+                        "SELECT username, password FROM users WHERE id = ? LIMIT 1")) {
+                    lookup.setInt(1, userId);
+                    try (ResultSet rs = lookup.executeQuery()) {
+                        if (rs.next()) {
+                            currentUsername = rs.getString("username");
+                            storedHash = rs.getString("password");
+                        }
+                    }
+                }
+            }
+
+            if (storedHash == null || storedHash.isEmpty()) {
+                AuthRateLimiter.recordFailure(ip);
+                sendJson(ctx, req, HttpResponseStatus.UNAUTHORIZED, errorPayload("Account not found."));
+                return;
+            }
+
+            if (!checkPassword(currentPassword, storedHash)) {
+                AuthRateLimiter.recordFailure(ip);
+                LOGGER.info("[auth/change-username] password mismatch for user id={} username='{}'", userId, currentUsername);
+                sendJson(ctx, req, HttpResponseStatus.UNAUTHORIZED,
+                        errorPayload("Current password is incorrect."));
+                return;
+            }
+
+            // Case-only changes (e.g. "bob" -> "Bob") are allowed; identical strings are not.
+            if (currentUsername != null && currentUsername.equals(newUsername)) {
+                sendJson(ctx, req, HttpResponseStatus.BAD_REQUEST,
+                        errorPayload("New username must be different from the current username."));
+                return;
+            }
+
+            int now = Emulator.getIntUnixTimestamp();
+            if (cooldownColumnExists && cooldownSeconds > 0 && lastChange > 0) {
+                long allowedAt = (long) lastChange + cooldownSeconds;
+                if (now < allowedAt) {
+                    long remaining = allowedAt - now;
+                    long days = remaining / 86400L;
+                    long hours = (remaining % 86400L) / 3600L;
+                    String wait = days > 0 ? (days + " day" + (days == 1 ? "" : "s")) : (hours + " hour" + (hours == 1 ? "" : "s"));
+                    sendJson(ctx, req, HttpResponseStatus.TOO_MANY_REQUESTS,
+                            errorPayload("You can rename again in " + wait + "."));
+                    return;
+                }
+            }
+
+            try (PreparedStatement banned = conn.prepareStatement(
+                    "SELECT 1 FROM banned_usernames WHERE LOWER(username) = LOWER(?) LIMIT 1")) {
+                banned.setString(1, newUsername);
+                try (ResultSet rs = banned.executeQuery()) {
+                    if (rs.next()) {
+                        sendJson(ctx, req, HttpResponseStatus.CONFLICT,
+                                errorPayload("That username is not allowed."));
+                        return;
+                    }
+                }
+            } catch (SQLException bannedTableError) {
+                // Only swallow "table doesn't exist" — banned_usernames is optional in some installs.
+                // Any other DB error (timeout, syntax, permission, connection drop) must fail the
+                // request so a transient outage can't silently bypass the blocklist.
+                if (bannedTableError.getErrorCode() != 1146
+                        && !"42S02".equals(bannedTableError.getSQLState())) {
+                    throw bannedTableError;
+                }
+            }
+
+            try (PreparedStatement check = conn.prepareStatement(
+                    "SELECT id FROM users WHERE LOWER(username) = LOWER(?) AND id <> ? LIMIT 1")) {
+                check.setString(1, newUsername);
+                check.setInt(2, userId);
+                try (ResultSet rs = check.executeQuery()) {
+                    if (rs.next()) {
+                        sendJson(ctx, req, HttpResponseStatus.CONFLICT,
+                                errorPayload("That username is already taken."));
+                        return;
+                    }
+                }
+            }
+
+            boolean previousAutoCommit = conn.getAutoCommit();
+            conn.setAutoCommit(false);
+
+            boolean cooldownRace = false;
+            boolean duplicateName = false;
+
+            try {
+                int rowsUpdated = 0;
+
+                // Folding the cooldown into the WHERE clause makes the rename atomic against
+                // a second concurrent request with the same token: only one of them will see
+                // rowsUpdated == 1, the other gets 0 and we surface it as 429 instead of letting
+                // both succeed and writing last_username_change twice.
+                try (PreparedStatement upd = conn.prepareStatement(
+                        cooldownColumnExists
+                                ? "UPDATE users SET username = ?, last_username_change = ? "
+                                + "WHERE id = ? "
+                                + "  AND (last_username_change = 0 OR last_username_change + ? <= ?) "
+                                + "LIMIT 1"
+                                : "UPDATE users SET username = ? WHERE id = ? LIMIT 1")) {
+                    upd.setString(1, newUsername);
+                    if (cooldownColumnExists) {
+                        upd.setInt(2, now);
+                        upd.setInt(3, userId);
+                        upd.setLong(4, cooldownSeconds);
+                        upd.setInt(5, now);
+                    } else {
+                        upd.setInt(2, userId);
+                    }
+                    try {
+                        rowsUpdated = upd.executeUpdate();
+                    } catch (SQLException dup) {
+                        // ER_DUP_ENTRY (1062) / SQLState 23000 — the UNIQUE KEY on users.username
+                        // raced us between the pre-check and the UPDATE. Surface as 409 instead of
+                        // a generic 500 so the UI can show "username taken".
+                        if (dup.getErrorCode() == 1062 || "23000".equals(dup.getSQLState())) {
+                            duplicateName = true;
+                        } else {
+                            throw dup;
+                        }
+                    }
+                }
+
+                if (duplicateName || (cooldownColumnExists && rowsUpdated == 0)) {
+                    if (!duplicateName) cooldownRace = true;
+                    conn.rollback();
+                } else {
+                    try (PreparedStatement upd = conn.prepareStatement(
+                            "UPDATE rooms SET owner_name = ? WHERE owner_id = ?")) {
+                        upd.setString(1, newUsername);
+                        upd.setInt(2, userId);
+                        upd.executeUpdate();
+                    }
+
+                    try (PreparedStatement upd = conn.prepareStatement(
+                            "UPDATE rooms_for_sale SET owner_name = ? WHERE user_id = ?")) {
+                        upd.setString(1, newUsername);
+                        upd.setInt(2, userId);
+                        upd.executeUpdate();
+                    } catch (SQLException roomsForSale) {
+                        // rooms_for_sale is optional — only swallow "table doesn't exist".
+                        if (roomsForSale.getErrorCode() != 1146
+                                && !"42S02".equals(roomsForSale.getSQLState())) {
+                            throw roomsForSale;
+                        }
+                    }
+
+                    conn.commit();
+                }
+            } catch (SQLException txError) {
+                try { conn.rollback(); } catch (SQLException ignore) {}
+                throw txError;
+            } finally {
+                conn.setAutoCommit(previousAutoCommit);
+            }
+
+            if (duplicateName) {
+                LOGGER.info("[auth/change-username] dup-entry race for user id={} wanted='{}'", userId, newUsername);
+                sendJson(ctx, req, HttpResponseStatus.CONFLICT,
+                        errorPayload("That username is already taken."));
+                return;
+            }
+
+            if (cooldownRace) {
+                LOGGER.info("[auth/change-username] cooldown race for user id={} (concurrent rename rejected)", userId);
+                sendJson(ctx, req, HttpResponseStatus.TOO_MANY_REQUESTS,
+                        errorPayload("Rename already in progress — please wait."));
+                return;
+            }
+
+            // Refresh in-memory caches BEFORE we drop the client. On disconnect, Habbo.disconnect()
+            // calls HabboInfo.run() which persists every field of HabboInfo back to the users row
+            // (including username) — so if the in-memory object still holds the old name it will
+            // overwrite the DB update we just committed. We also need to re-key the
+            // HabboManager.onlineHabbosByName map and update any loaded Room.ownerName fields so
+            // navigator / room cards stop showing the old name without a server restart.
+            try {
+                if (Emulator.getGameServer() != null && Emulator.getGameServer().getGameClientManager() != null
+                        && Emulator.getGameEnvironment() != null && Emulator.getGameEnvironment().getHabboManager() != null) {
+                    com.eu.habbo.habbohotel.users.Habbo habbo =
+                            Emulator.getGameServer().getGameClientManager().getHabbo(userId);
+                    if (habbo != null) {
+                        // Re-key the username map AND update the in-memory username so the
+                        // disconnect-time HabboInfo.run() persists the new name, not the old one.
+                        Emulator.getGameEnvironment().getHabboManager().removeHabbo(habbo);
+                        habbo.getHabboInfo().setUsername(newUsername);
+                        Emulator.getGameEnvironment().getHabboManager().addHabbo(habbo);
+                    }
+                }
+            } catch (Exception cacheError) {
+                LOGGER.warn("[auth/change-username] failed to refresh HabboManager cache", cacheError);
+            }
+
+            try {
+                if (Emulator.getGameEnvironment() != null && Emulator.getGameEnvironment().getRoomManager() != null) {
+                    for (com.eu.habbo.habbohotel.rooms.Room room : Emulator.getGameEnvironment().getRoomManager().getActiveRooms()) {
+                        if (room.getOwnerId() == userId) {
+                            room.setOwnerName(newUsername);
+                        }
+                    }
+                }
+            } catch (Exception cacheError) {
+                LOGGER.warn("[auth/change-username] failed to refresh Room.ownerName cache", cacheError);
+            }
+
+            // Marketplace offer-list pages bake the seller name into the serialized payload,
+            // so invalidate it; the next /offers request will rebuild it with the new name.
+            try {
+                com.eu.habbo.messages.incoming.catalog.marketplace.RequestOffersEvent.cachedResults.clear();
+            } catch (Exception cacheError) {
+                LOGGER.warn("[auth/change-username] failed to clear marketplace cache", cacheError);
+            }
+
+            // Drop any active session so the user reconnects with the fresh identity
+            // (friend list, navigator, messenger threads all refresh on relogin).
+            try (PreparedStatement clear = conn.prepareStatement(
+                    "UPDATE users SET auth_ticket = '', online = '0' WHERE id = ? LIMIT 1")) {
+                clear.setInt(1, userId);
+                clear.executeUpdate();
+            }
+
+            if (Emulator.getGameServer() != null
+                    && Emulator.getGameServer().getGameClientManager() != null) {
+                com.eu.habbo.habbohotel.users.Habbo habbo =
+                        Emulator.getGameServer().getGameClientManager().getHabbo(userId);
+                if (habbo != null && habbo.getClient() != null) {
+                    Emulator.getGameServer().getGameClientManager().disposeClient(habbo.getClient());
+                }
+            }
+
+            AuthRateLimiter.recordSuccess(ip);
+            LOGGER.info("[auth/change-username] '{}' -> '{}' (user id={}, ip='{}')",
+                    currentUsername, newUsername, userId, ip);
+
+            JsonObject ok = new JsonObject();
+            ok.addProperty("message", "Username updated. Please log in again with your new name.");
+            ok.addProperty("username", newUsername);
+            ok.addProperty("relogin", true);
+            sendJson(ctx, req, HttpResponseStatus.OK, ok);
+        } catch (Exception e) {
+            LOGGER.error("[auth/change-username] failed for user id=" + userId, e);
+            sendJson(ctx, req, HttpResponseStatus.INTERNAL_SERVER_ERROR, errorPayload("Server error."));
+        }
+    }
+
     private void handleLogout(ChannelHandlerContext ctx, FullHttpRequest req, com.google.gson.JsonObject body) {
         String ssoTicket = readString(body, "ssoTicket");
         String rememberToken = readString(body, "rememberToken").trim();
@@ -1135,11 +1664,20 @@ public class AuthHttpHandler extends ChannelInboundHandlerAdapter {
         String origin = req.headers().get(HttpHeaderNames.ORIGIN);
         if (origin != null && !origin.isEmpty()) {
             response.headers().set("Access-Control-Allow-Origin", origin);
-            response.headers().set("Vary", "Origin");
             response.headers().set("Access-Control-Allow-Credentials", "true");
         }
         response.headers().set("Access-Control-Allow-Methods", "GET, HEAD, POST, OPTIONS");
-        response.headers().set("Access-Control-Allow-Headers", "Content-Type, X-Requested-With, X-Nitro-Key, X-Nitro-Api");
+
+        String requestedHeaders = req.headers().get("Access-Control-Request-Headers");
+        if (requestedHeaders != null && !requestedHeaders.isEmpty()) {
+            response.headers().set("Access-Control-Allow-Headers", requestedHeaders);
+        } else {
+            response.headers().set("Access-Control-Allow-Headers",
+                    "Authorization, Content-Type, X-Requested-With, X-Nitro-Key, X-Nitro-Api");
+        }
+
+        response.headers().set("Vary", "Origin, Access-Control-Request-Headers, Access-Control-Request-Method");
+        response.headers().set("Access-Control-Max-Age", "600");
         response.headers().set("Access-Control-Expose-Headers", "X-Nitro-Sec, X-Nitro-Key-Fp, X-Nitro-Derive-Fp");
     }
 

Emulator/src/main/java/com/eu/habbo/networking/gameserver/auth/NitroSecureApiHandler.java

@@ -267,11 +267,20 @@ public class NitroSecureApiHandler extends ChannelDuplexHandler {
         String origin = req.headers().get(HttpHeaderNames.ORIGIN);
         if (origin != null && !origin.isEmpty()) {
             response.headers().set("Access-Control-Allow-Origin", origin);
-            response.headers().set("Vary", "Origin");
             response.headers().set("Access-Control-Allow-Credentials", "true");
         }
         response.headers().set("Access-Control-Allow-Methods", "GET, HEAD, POST, OPTIONS");
-        response.headers().set("Access-Control-Allow-Headers", "Content-Type, X-Requested-With, X-Nitro-Key, X-Nitro-Api");
+
+        String requestedHeaders = req.headers().get("Access-Control-Request-Headers");
+        if (requestedHeaders != null && !requestedHeaders.isEmpty()) {
+            response.headers().set("Access-Control-Allow-Headers", requestedHeaders);
+        } else {
+            response.headers().set("Access-Control-Allow-Headers",
+                    "Authorization, Content-Type, X-Requested-With, X-Nitro-Key, X-Nitro-Api");
+        }
+
+        response.headers().set("Vary", "Origin, Access-Control-Request-Headers, Access-Control-Request-Method");
+        response.headers().set("Access-Control-Max-Age", "600");
         response.headers().set("Access-Control-Expose-Headers", "X-Nitro-Sec, X-Nitro-Key-Fp, X-Nitro-Derive-Fp");
     }
 

Emulator/src/main/java/com/eu/habbo/networking/gameserver/auth/NitroSecureAssetHandler.java

@@ -299,10 +299,18 @@ public class NitroSecureAssetHandler extends ChannelInboundHandlerAdapter {
         String origin = req.headers().get(HttpHeaderNames.ORIGIN);
         if (origin != null && !origin.isEmpty()) {
             response.headers().set("Access-Control-Allow-Origin", origin);
-            response.headers().set("Vary", "Origin");
         }
         response.headers().set("Access-Control-Allow-Methods", "GET, HEAD, POST, OPTIONS");
-        response.headers().set("Access-Control-Allow-Headers", "Content-Type, X-Nitro-Key");
+
+        String requestedHeaders = req.headers().get("Access-Control-Request-Headers");
+        if (requestedHeaders != null && !requestedHeaders.isEmpty()) {
+            response.headers().set("Access-Control-Allow-Headers", requestedHeaders);
+        } else {
+            response.headers().set("Access-Control-Allow-Headers", "Authorization, Content-Type, X-Nitro-Key");
+        }
+
+        response.headers().set("Vary", "Origin, Access-Control-Request-Headers, Access-Control-Request-Method");
+        response.headers().set("Access-Control-Max-Age", "600");
         response.headers().set("Access-Control-Expose-Headers", "X-Nitro-Sec, X-Nitro-Key-Fp, X-Nitro-Derive-Fp");
     }