fix(multiplayer): show anti-virus software warning if cato file not found.

HMCL/src/main/java/org/jackhuang/hmcl/ui/multiplayer/MultiplayerManager.java

@@ -35,10 +35,7 @@ import org.jackhuang.hmcl.util.platform.ManagedProcess;
 import org.jackhuang.hmcl.util.platform.OperatingSystem;
 import org.jetbrains.annotations.Nullable;
 
-import java.io.BufferedWriter;
-import java.io.IOException;
-import java.io.OutputStreamWriter;
-import java.io.UncheckedIOException;
+import java.io.*;
 import java.net.ServerSocket;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
@@ -175,7 +172,7 @@ public final class MultiplayerManager {
     public static CatoSession createSession(String token, String sessionName, int gamePort, boolean allowAllJoinRequests) throws IOException {
         Path exe = getCatoExecutable();
         if (!Files.isRegularFile(exe)) {
-            throw new IllegalStateException("Cato file not found");
+            throw new FileNotFoundException("Cato file not found");
         }
 
         if (!isPortAvailable(3478)) {

HMCL/src/main/java/org/jackhuang/hmcl/ui/multiplayer/MultiplayerPage.java

@@ -39,6 +39,7 @@ import org.jackhuang.hmcl.ui.decorator.DecoratorAnimatedPage;
 import org.jackhuang.hmcl.ui.decorator.DecoratorPage;
 import org.jackhuang.hmcl.util.StringUtils;
 
+import java.io.FileNotFoundException;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Consumer;
@@ -235,9 +236,14 @@ public class MultiplayerPage extends DecoratorAnimatedPage implements DecoratorP
             } catch (MultiplayerManager.CatoAlreadyStartedException e) {
                 LOG.log(Level.WARNING, "Cato already started", e);
                 reject.accept(i18n("multiplayer.session.error.already_started"));
+                return;
+            } catch (FileNotFoundException e) {
+                LOG.log(Level.WARNING, "Cato not found", e);
+                reject.accept(i18n("multiplayer.session.error.file_not_found"));
+                return;
             } catch (Exception e) {
                 LOG.log(Level.WARNING, "Failed to create session", e);
-                reject.accept(i18n("multiplayer.session.create.error"));
+                reject.accept(i18n("multiplayer.session.create.error") + e.getLocalizedMessage());
                 return;
             }
 
@@ -324,6 +330,10 @@ public class MultiplayerPage extends DecoratorAnimatedPage implements DecoratorP
                                 LOG.info("Cato already started");
                                 reject.accept(i18n("multiplayer.session.error.already_started"));
                                 return null;
+                            } else if (resolved instanceof FileNotFoundException) {
+                                LOG.log(Level.WARNING, "Cato not found", resolved);
+                                reject.accept(i18n("multiplayer.session.error.file_not_found"));
+                                return null;
                             } else if (resolved instanceof MultiplayerManager.JoinRequestTimeoutException) {
                                 LOG.info("Cato already started");
                                 reject.accept(i18n("multiplayer.session.join.wait_timeout"));

HMCL/src/main/resources/assets/lang/I18N.properties

@@ -664,6 +664,7 @@ multiplayer.session.create.token=Token
 multiplayer.session.create.token.apply=Apply for static token
 multiplayer.session.create.token.prompt=Default randomized. You can apply for your own token at noin.cn (Chinese website). 
 multiplayer.session.error.already_started=Cato service has already started locally. Please check whether there are other multiplayer services served or not. Or you can kill cato process in task manager.
+multiplayer.session.error.file_not_found=Cannot found cato. Please check if anti-virus software blocked our functionality.
 multiplayer.session.expired=Multiplayer session has expired. You should re-create or re-join a room to continue.
 multiplayer.session.hint=You must click "Open LAN Server" in game in order to enable multiplayer functionality.
 multiplayer.session.join=Join Session

HMCL/src/main/resources/assets/lang/I18N_zh.properties

@@ -664,6 +664,7 @@ multiplayer.session.create.token=Token
 multiplayer.session.create.token.apply=申請靜態 Token
 multiplayer.session.create.token.prompt=預設為臨時 Token。你可以在 noin.cn 上申請靜態 Token 並填寫至此處 
 multiplayer.session.error.already_started=本地已經開啟 cato 服務，請檢查是否有其他 HMCL 正在運行聯機服務。或者你可以在任務管理器裡殺掉 cato 進程以繼續。
+multiplayer.session.error.file_not_found=找不到 cato。請檢查防毒軟體是否攔截了 HMCL 的多人聯機服務（cato），如果被攔截，請取消攔截後重啟 HMCL。
 multiplayer.session.expired=聯機會話連續使用時間超過了 3 小時，你需要重新創建/加入房間以繼續聯機。
 multiplayer.session.join=加入房間
 multiplayer.session.join.error=加入房間失敗

HMCL/src/main/resources/assets/lang/I18N_zh_CN.properties

@@ -664,6 +664,7 @@ multiplayer.session.create.token=Token
 multiplayer.session.create.token.apply=申请静态 Token
 multiplayer.session.create.token.prompt=默认为临时 Token。你可以在 noin.cn 上申请静态 Token 并填写至此处 
 multiplayer.session.error.already_started=本地已经开启 cato 服务，请检查是否有其他 HMCL 正在运行联机服务。或者你可以在任务管理器里杀掉 cato 进程以继续。
+multiplayer.session.error.file_not_found=找不到 cato。请检查杀毒软件是否拦截了 HMCL 的多人联机服务（cato），如果被拦截，请取消拦截后重启 HMCL。
 multiplayer.session.expired=联机会话连续使用时间超过了 3 小时，你需要重新创建/加入房间以继续联机。
 multiplayer.session.join=加入房间
 multiplayer.session.join.error=加入房间失败。如果你或对方的网络类型是差（对称型），可能无法使用联机功能。