Assets: try meta download first, fallback to JAR extract

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/ui/jfx/JFXLauncher.java

@@ -12,8 +12,12 @@ import me.sashegdev.zernmc.launcher.auth.AuthManager;
 import me.sashegdev.zernmc.launcher.minecraft.Instance;
 import me.sashegdev.zernmc.launcher.minecraft.InstanceManager;
 
+import java.io.BufferedReader;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 import java.net.InetSocketAddress;
@@ -86,6 +90,16 @@ public class JFXLauncher extends Application {
                 return;
             }
             
+            String serverVersion = getServerVersion();
+            if (serverVersion != null && !serverVersion.isEmpty()) {
+                System.out.println("[JFX] Загрузка assets через мета для версии " + serverVersion);
+                if (downloadAssetsFromMeta(serverVersion)) {
+                    System.out.println("[JFX] Assets загружены через мета");
+                    return;
+                }
+                System.out.println("[JFX] Мета недоступна, использую fallback");
+            }
+            
             System.out.println("[JFX] Извлечение assets из JAR...");
             Path jarPath = Paths.get(JFXLauncher.class.getProtectionDomain().getCodeSource().getLocation().toURI());
             if (Files.exists(jarPath) && jarPath.toString().endsWith(".jar")) {
@@ -106,12 +120,83 @@ public class JFXLauncher extends Application {
                         }
                     }
                 }
-                System.out.println("[JFX] Assets извлечены");
+                System.out.println("[JFX] Assets извлечены из JAR");
             }
         } catch (Exception e) {
             System.out.println("[JFX] Ошибка извлечения assets: " + e.getMessage());
         }
     }
+    
+    private static String getServerVersion() {
+        try {
+            URL url = new URL("http://localhost:1582/launcher/version");
+            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+            conn.setConnectTimeout(3000);
+            conn.setReadTimeout(3000);
+            if (conn.getResponseCode() == 200) {
+                try (BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()))) {
+                    StringBuilder sb = new StringBuilder();
+                    String line;
+                    while ((line = br.readLine()) != null) sb.append(line);
+                    String response = sb.toString();
+                    int versionStart = response.indexOf("\"version\":\"");
+                    if (versionStart >= 0) {
+                        int afterVersion = versionStart + 11;
+                        int versionEnd = response.indexOf("\"", afterVersion);
+                        if (versionEnd > afterVersion) {
+                            return response.substring(afterVersion, versionEnd);
+                        }
+                    }
+                }
+            }
+        } catch (Exception ignored) {}
+        return null;
+    }
+    
+    private static boolean downloadAssetsFromMeta(String version) {
+        try {
+            URL metaUrl = new URL("http://localhost:1582/launcher/meta/" + version);
+            HttpURLConnection conn = (HttpURLConnection) metaUrl.openConnection();
+            conn.setConnectTimeout(5000);
+            conn.setReadTimeout(10000);
+            if (conn.getResponseCode() != 200) return false;
+            
+            try (BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()))) {
+                StringBuilder sb = new StringBuilder();
+                String line;
+                while ((line = br.readLine()) != null) sb.append(line);
+                org.json.JSONObject meta = new org.json.JSONObject(sb.toString());
+                
+                Path assetsDir = Paths.get("assets");
+                Files.createDirectories(assetsDir);
+                
+                for (Object fileObj : meta.getJSONArray("files")) {
+                    org.json.JSONObject file = (org.json.JSONObject) fileObj;
+                    String path = file.getString("path");
+                    if (path.startsWith("assets/")) {
+                        String downloadUrl = "http://localhost:1582/launcher/file/" + version + "/" + path;
+                        Path outPath = assetsDir.resolve(path.substring(7));
+                        Files.createDirectories(outPath.getParent());
+                        
+                        URL fileUrl = new URL(downloadUrl);
+                        HttpURLConnection fileConn = (HttpURLConnection) fileUrl.openConnection();
+                        fileConn.setConnectTimeout(10000);
+                        fileConn.setReadTimeout(30000);
+                        if (fileConn.getResponseCode() == 200) {
+                            try (InputStream is = fileConn.getInputStream()) {
+                                Files.copy(is, outPath);
+                            }
+                        }
+                        fileConn.disconnect();
+                    }
+                }
+                return true;
+            }
+        } catch (Exception e) {
+            System.out.println("[JFX] Ошибка загрузки через мета: " + e.getMessage());
+            return false;
+        }
+    }
 
     @Override
     public void start(Stage stage) {