fix: критичные баги — отсутствие auth на pack файлах, сломанный proxy fallback, race condition installInProgress, JSON парсинг, падение loadMetadata

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/minecraft/Instance.java

@@ -130,7 +130,9 @@ public class Instance {
             this.isServerPack = meta.isServerPack;
             this.serverVersion = meta.serverVersion;
             this.serverPackName = meta.serverPackName;
-        } catch (Exception ignored) {}
+        } catch (Exception e) {
+            System.err.println("[Instance] Failed to load metadata for " + name + ": " + e.getMessage());
+        }
     }
 
     private void saveMetadata() {

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

@@ -44,6 +44,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicBoolean;
 import com.sun.net.httpserver.HttpServer;
 import com.sun.net.httpserver.HttpExchange;
 import com.sun.net.httpserver.Headers;
@@ -51,7 +52,7 @@ import com.sun.net.httpserver.Headers;
 public class JFXLauncher extends Application {
     private static int PORT = 8080;
     private static final String APP_TITLE = "ZernMC Launcher";
-    private static final String LAUNCHER_SERVER = System.getProperty("launcher.server", "http://87.120.187.36:1582");
+    private static final String LAUNCHER_SERVER = System.getProperty("launcher.server", "https://api.zernmc.ru");
     private final LauncherAPI api = new LauncherAPI();
     private final Gson gson = new Gson();
     private HttpServer server;
@@ -64,7 +65,7 @@ public class JFXLauncher extends Application {
     private static volatile String installProgressLabel = "";
     private static volatile int installProgressCurrent = 0;
     private static volatile int installProgressTotal = 100;
-    private static volatile boolean installInProgress = false;
+    private static final AtomicBoolean installInProgress = new AtomicBoolean(false);
     private static volatile String installStageName = "";
     private static volatile int installStageIndex = 0;
     private static volatile int installStageCount = 1;
@@ -114,11 +115,11 @@ public class JFXLauncher extends Application {
     }
     
     public static void setInstallInProgress(boolean inProgress) {
-        installInProgress = inProgress;
+        installInProgress.set(inProgress);
     }
     
     public static boolean isInstallInProgress() {
-        return installInProgress;
+        return installInProgress.get();
     }
     
     public static void appendLauncherLog(String msg) {
@@ -243,14 +244,9 @@ public class JFXLauncher extends Application {
                     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);
-                        }
+                    org.json.JSONObject obj = new org.json.JSONObject(sb.toString());
+                    if (obj.has("version")) {
+                        return obj.getString("version");
                     }
                 }
             }
@@ -669,13 +665,14 @@ public class JFXLauncher extends Application {
     }
 
     private void handleInstall(HttpExchange exchange) {
-        if (installInProgress) {
+        if (!installInProgress.compareAndSet(false, true)) {
             sendJson(exchange, Map.of("success", false, "error", "Installation already in progress"));
             return;
         }
         
         try {
             if (!api.isLoggedIn()) {
+                installInProgress.set(false);
                 sendJson(exchange, Map.of("success", false, "error", "Not authenticated"));
                 return;
             }
@@ -690,6 +687,7 @@ public class JFXLauncher extends Application {
 
             var createResult = api.instances().createInstance(name);
             if (!createResult.isSuccess()) {
+                installInProgress.set(false);
                 sendJson(exchange, Map.of("success", false, "error", createResult.getError()));
                 return;
             }
@@ -706,7 +704,6 @@ public class JFXLauncher extends Application {
                 
                 sendJson(exchange, Map.of("success", true, "message", "Installation started"));
                 
-                setInstallInProgress(true);
                 setInstallProgressWithStage("Preparing...", 0, 100, "Preparing", 0, 4);
                 
                 Thread installThread = new Thread(() -> {
@@ -777,15 +774,15 @@ public class JFXLauncher extends Application {
             progress.put("label", installProgressLabel);
             progress.put("current", installProgressCurrent);
             progress.put("total", installProgressTotal);
-            progress.put("inProgress", installInProgress);
+            progress.put("inProgress", installInProgress.get());
             progress.put("stageName", installStageName);
             progress.put("stageIndex", installStageIndex);
             progress.put("stageCount", Math.max(installStageCount, 1));
             
-            if (installInProgress && installProgressTotal > 0) {
+            if (installInProgress.get() && installProgressTotal > 0) {
                 progress.put("percent", (int) ((installProgressCurrent * 100.0) / installProgressTotal));
             } else {
-                progress.put("percent", installInProgress ? 0 : 100);
+                progress.put("percent", installInProgress.get() ? 0 : 100);
             }
             
             sendJson(exchange, Map.of("success", true, "data", progress));

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/utils/Config.java

@@ -15,7 +15,7 @@ public class Config {
     private static final Properties props = new Properties();
 
     private static volatile int maxMemory = 4096;
-    private static volatile String serverUrl = "http://87.120.187.36:1582";
+    private static volatile String serverUrl = "https://api.zernmc.ru";
     private static volatile String lastUsername = "Player";
     private static volatile int windowWidth = 1280;
     private static volatile int windowHeight = 720;
@@ -238,7 +238,14 @@ public class Config {
     public static long getSystemTotalRamMB() {
         long totalMb = getTotalSystemRamMB();
         if (totalMb > 0) return totalMb;
-        return Runtime.getRuntime().maxMemory() / (1024 * 1024);
+        try {
+            java.lang.management.OperatingSystemMXBean osBean = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
+            if (osBean instanceof com.sun.management.OperatingSystemMXBean sunBean) {
+                return sunBean.getTotalMemorySize() / (1024 * 1024);
+            }
+        } catch (Exception ignored) {}
+        long jvmMax = Runtime.getRuntime().maxMemory() / (1024 * 1024);
+        return Math.max(jvmMax, 4096);
     }
 
     public static String getSystemJvmFlags() {

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/utils/ZHttpClient.java

@@ -27,7 +27,7 @@ public class ZHttpClient {
             .version(HttpClient.Version.HTTP_1_1)
             .build();
 
-    private static String BASE_URL = "http://87.120.187.36:1582";
+    private static String BASE_URL = "https://api.zernmc.ru";
 
     private static final AtomicBoolean useProxyMode = new AtomicBoolean(false);
     private static final AtomicBoolean proxyTested = new AtomicBoolean(false);
@@ -41,7 +41,7 @@ public class ZHttpClient {
     }
 
     public enum ServiceType {
-        ZERN_SERVER("http://87.120.187.36:1582", true),
+        ZERN_SERVER("https://api.zernmc.ru", true),
         FABRIC_META("https://meta.fabricmc.net", false),
         FABRIC_MAVEN("https://maven.fabricmc.net", false),
         MOJANG_META("https://piston-meta.mojang.com", false),
@@ -306,7 +306,7 @@ public class ZHttpClient {
 
         try {
             String encodedUrl = URLEncoder.encode(url, StandardCharsets.UTF_8);
-            String proxyUrl = BASE_URL + "/download?url=" + encodedUrl;
+            String proxyUrl = BASE_URL + "/proxy/download?url=" + encodedUrl;
 
             HttpRequest request = HttpRequest.newBuilder()
                     .uri(URI.create(proxyUrl))
@@ -373,10 +373,6 @@ public class ZHttpClient {
     }
 
     public static String get(String endpoint) throws IOException, InterruptedException {
-        if (useProxyMode.get()) {
-            return proxyGet(endpoint);
-        }
-
         try {
             HttpRequest.Builder requestBuilder = HttpRequest.newBuilder()
                     .uri(URI.create(BASE_URL + endpoint))
@@ -402,33 +398,6 @@ public class ZHttpClient {
         }
     }
 
-    private static String proxyGet(String endpoint) throws IOException {
-        try {
-            HttpRequest.Builder requestBuilder = HttpRequest.newBuilder()
-                    .uri(URI.create(BASE_URL + "/proxy" + endpoint))
-                    .timeout(Duration.ofSeconds(30))
-                    .header("User-Agent", "ZernMC-Launcher/1.0")
-                    .GET();
-        
-            String accessToken = AuthManager.getAccessToken();
-            if (accessToken != null && !accessToken.equals("0")) {
-                requestBuilder.header("Authorization", "Bearer " + accessToken);
-            }
-        
-            HttpRequest request = requestBuilder.build();
-            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
-        
-            if (response.statusCode() != 200) {
-                throw new IOException("HTTP " + response.statusCode());
-            }
-        
-            proxySuccessCount++;
-            return response.body();
-        } catch (Exception e) {
-            throw new IOException("Proxy error: " + e.getMessage(), e);
-        }
-    }
-
     public static List<String> getFabricLoaderVersions() throws IOException, InterruptedException {
         String url = "https://meta.fabricmc.net/v2/versions/loader";
         return parseFabricVersionsFromJson(getWithSmartProxy(url));

server/main.py

@@ -46,8 +46,8 @@ VERSIONS_DIR = BUILDS_DIR / "versions"
 
 # Mirror configuration
 LAUNCHER_MIRRORS = {
-    "main": "http://87.120.187.36:1582",
-    "mirror-1": "http://212.22.82.243:1582",
+    "main": "https://api.zernmc.ru",
+    "mirror-1": "https://api.zernmc.online",
 }
 
 # Server role: "main" or "mirror"
@@ -57,12 +57,11 @@ SYNC_API_KEY = os.environ.get("SYNC_API_KEY", "changeme")  # API key for mirror
 MASTER_KEY = os.environ.get("MASTER_KEY", "sashegdevsupeddevepta")  # Master key for admin/mirror
 
 # IP Filtering Configuration
-import os
 import middleware as mw
 
 # Only configure manually blocked IPs at import time
 # Public blocklists are loaded in lifespan (once, not per-worker)
-MANUAL_BLOCKED_IPS = set(os.environ.get("BLOCKED_IPS", "").split(",")) - {""}
+MANUAL_BLOCKED_IPS = set(os.environ.get("BLOCKED_IPS", "").split(",")) - {""}  # noqa: F811
 
 # Cache file for blocklist (load once)
 BLOCKLIST_CACHE_FILE = Path("data/blocklist_cache.txt")
@@ -169,49 +168,17 @@ async def lifespan(app: FastAPI):
     
     logger.info("All packs ready. Server is running.")
 
-    # Mirror sync with main server
+    # Mirror sync with main server (full diff: hash check + delete stale)
     if SERVER_ROLE == "mirror" and MAIN_SERVER_URL:
         logger.info(f"Mirror mode: syncing from {MAIN_SERVER_URL}")
         try:
             async with httpx.AsyncClient() as client:
-                resp = await client.get(f"{MAIN_SERVER_URL}/launcher/version")
-                main_data = resp.json()
-                main_version = main_data.get("version")
-                logger.info(f"Main server version: {main_version}")
-
-                # Get sync manifest with API key
                 headers = {"X-Sync-Key": SYNC_API_KEY}
-                resp = await client.get(f"{MAIN_SERVER_URL}/launcher/sync/{main_version}", headers=headers)
-                if resp.status_code != 200:
-                    logger.warning(f"Sync failed: {resp.status_code} - {resp.text}")
-                    raise Exception(f"Sync auth failed: {resp.status_code}")
-
-                sync_data = resp.json()
-                logger.info(f"Need to sync {len(sync_data.get('files', []))} files")
-
-                # Download each file
-                for f in sync_data.get("files", []):
-                    file_path = BUILDS_DIR / f["path"]
-                    if not file_path.exists():
-                        logger.info(f"Syncing: {f['path']}")
-                        file_path.parent.mkdir(parents=True, exist_ok=True)
-
-                        # Download file
-                        file_url = f"{MAIN_SERVER_URL}/launcher/sync/{main_version}/file/{f['path']}"
-                        resp = await client.get(file_url, headers=headers)
-                        file_path.write_bytes(resp.content)
-                        logger.debug(f"Downloaded: {f['path']}")
-
-                # Delete removed files
-                for deleted_file in sync_data.get("delete", []):
-                    del_path = BUILDS_DIR / deleted_file
-                    if del_path.exists():
-                        del_path.unlink()
-                        logger.info(f"Deleted: {deleted_file}")
-
-                logger.info("Mirror sync complete")
+                result = await sync_mirror_full(client, headers, MAIN_SERVER_URL)
+                if result:
+                    await sync_mirror_self_update(client, headers, MAIN_SERVER_URL)
         except Exception as e:
-            logger.warning(f"Mirror sync failed: {e}")
+            logger.warning(f"Initial mirror sync failed: {e}")
 
     # Scan launcher versions and generate meta
     logger.info("Scanning launcher versions...")
@@ -237,49 +204,18 @@ async def lifespan(app: FastAPI):
     global proxy_client
     proxy_client = httpx.AsyncClient(timeout=60.0, follow_redirects=True)
 
-    # Start background sync task for mirrors
+    # Start background sync + self-update task for mirrors
     if SERVER_ROLE == "mirror" and MAIN_SERVER_URL:
-        import asyncio
-
         async def periodic_sync():
-            sync_interval = 7200  # 2 hours
+            sync_interval = 1800  # 30 minutes
             while True:
                 await asyncio.sleep(sync_interval)
                 try:
                     logger.info("Periodic mirror sync started...")
                     headers = {"X-Sync-Key": SYNC_API_KEY}
-
-                    resp = await proxy_client.get(f"{MAIN_SERVER_URL}/launcher/version")
-                    main_data = resp.json()
-                    main_version = main_data.get("version")
-
-                    resp = await proxy_client.get(
-                        f"{MAIN_SERVER_URL}/launcher/sync/{main_version}",
-                        headers=headers
-                    )
-                    if resp.status_code != 200:
-                        logger.warning(f"Periodic sync failed: {resp.status_code}")
-                        continue
-
-                    sync_data = resp.json()
-                    logger.info(f"Periodic sync: {len(sync_data.get('files', []))} files")
-
-                    for f in sync_data.get("files", []):
-                        file_path = BUILDS_DIR / f["path"]
-                        if not file_path.exists():
-                            file_path.parent.mkdir(parents=True, exist_ok=True)
-                            file_url = f"{MAIN_SERVER_URL}/launcher/sync/{main_version}/file/{f['path']}"
-                            resp = await proxy_client.get(file_url, headers=headers)
-                            file_path.write_bytes(resp.content)
-                            logger.debug(f"Synced: {f['path']}")
-
-                    for deleted_file in sync_data.get("delete", []):
-                        del_path = BUILDS_DIR / deleted_file
-                        if del_path.exists():
-                            del_path.unlink()
-                            logger.info(f"Deleted: {deleted_file}")
-
-                    logger.info("Periodic mirror sync complete")
+                    result = await sync_mirror_full(proxy_client, headers, MAIN_SERVER_URL)
+                    if result:
+                        await sync_mirror_self_update(proxy_client, headers, MAIN_SERVER_URL)
                 except Exception as e:
                     logger.warning(f"Periodic sync error: {e}")
 
@@ -294,6 +230,236 @@ async def lifespan(app: FastAPI):
     logger.info("Server shutting down...")
 
 
+# ====================== MIRROR SYNC HELPERS ======================
+
+    async def _calculate_file_hash_async(file_path: Path) -> Optional[str]:
+        """Calculate SHA256 hash of a file asynchronously"""
+        try:
+            loop = asyncio.get_running_loop()
+        def _hash():
+            h = hashlib.sha256()
+            with open(file_path, "rb") as f:
+                while chunk := f.read(65536):
+                    h.update(chunk)
+            return h.hexdigest()
+        return await loop.run_in_executor(None, _hash)
+    except Exception:
+        return None
+
+
+async def sync_mirror_full(
+    client: httpx.AsyncClient,
+    headers: dict,
+    main_url: str,
+) -> bool:
+    """Full mirror sync: compare by hash, download new/changed, delete stale.
+    Returns True if sync completed without critical errors."""
+    try:
+        # Get latest version from main
+        resp = await client.get(f"{main_url}/launcher/version", timeout=15)
+        resp.raise_for_status()
+        main_data = resp.json()
+        main_version = main_data.get("version")
+        if not main_version:
+            logger.warning("sync_mirror_full: no version from main")
+            return False
+        logger.info(f"sync_mirror_full: main version = {main_version}")
+
+        # Get sync manifest (full file list with hashes)
+        resp = await client.get(
+            f"{main_url}/launcher/sync/{main_version}", headers=headers, timeout=30
+        )
+        if resp.status_code != 200:
+            logger.warning(f"sync_mirror_full: manifest returned {resp.status_code}")
+            return False
+
+        sync_data = resp.json()
+        server_files = sync_data.get("files", [])
+        logger.info(f"sync_mirror_full: {len(server_files)} files in manifest")
+
+        # Build server file map
+        server_map = {}
+        for f in server_files:
+            server_map[f["path"]] = f
+
+        # Scan local builds directory
+        local_files = {}
+        if BUILDS_DIR.exists():
+            for fpath in BUILDS_DIR.rglob("*"):
+                if fpath.is_file() and fpath.name not in ("meta.json", "blocklist_cache.txt"):
+                    rel = str(fpath.relative_to(BUILDS_DIR))
+                    local_files[rel] = ""
+
+        # Download new/changed files
+        downloaded = 0
+        for path, info in server_map.items():
+            local_path = BUILDS_DIR / path
+            need_download = False
+
+            if not local_path.exists():
+                need_download = True
+                logger.info(f"  New: {path}")
+            else:
+                local_hash = await _calculate_file_hash_async(local_path)
+                server_hash = info.get("hash", "").replace("sha256:", "")
+                if local_hash and local_hash != server_hash:
+                    need_download = True
+                    logger.info(f"  Changed: {path}")
+
+            if need_download:
+                local_path.parent.mkdir(parents=True, exist_ok=True)
+                file_url = f"{main_url}/launcher/sync/{main_version}/file/{path}"
+                try:
+                    resp = await client.get(file_url, headers=headers, timeout=120)
+                    resp.raise_for_status()
+                    local_path.write_bytes(resp.content)
+                    downloaded += 1
+                    logger.debug(f"  Downloaded: {path}")
+                except Exception as e:
+                    logger.warning(f"  Failed to download {path}: {e}")
+
+        # Delete files that exist locally but not on server
+        deleted = 0
+        for local_path in list(local_files.keys()):
+            if local_path not in server_map:
+                del_path = BUILDS_DIR / local_path
+                try:
+                    del_path.unlink()
+                    deleted += 1
+                    logger.info(f"  Deleted stale: {local_path}")
+                except Exception as e:
+                    logger.warning(f"  Failed to delete {local_path}: {e}")
+
+        # Clean empty directories
+        for fpath in sorted(BUILDS_DIR.rglob("*"), key=lambda p: str(p), reverse=True):
+            if fpath.is_dir() and fpath != BUILDS_DIR:
+                try:
+                    if not any(fpath.iterdir()):
+                        fpath.rmdir()
+                        logger.debug(f"  Removed empty dir: {fpath.relative_to(BUILDS_DIR)}")
+                except Exception:
+                    pass
+
+        logger.info(f"sync_mirror_full: downloaded={downloaded}, deleted={deleted}")
+        return True
+
+    except httpx.HTTPStatusError as e:
+        logger.warning(f"sync_mirror_full HTTP error: {e.response.status_code} - {e.response.text[:200]}")
+        return False
+    except Exception as e:
+        logger.warning(f"sync_mirror_full error: {e}")
+        return False
+
+
+async def sync_mirror_self_update(
+    client: httpx.AsyncClient,
+    headers: dict,
+    main_url: str,
+) -> bool:
+    """Check if the mirror's own launcher distribution needs updating.
+    Downloads new ZIP + extracts it, or replaces the bootstrap JAR."""
+    try:
+        # Get current launcher version info
+        resp = await client.get(f"{main_url}/launcher/version", timeout=15)
+        resp.raise_for_status()
+        version_info = resp.json()
+        server_version = version_info.get("version", "")
+        if not server_version:
+            return False
+
+        # Check current local version
+        local_version = "0.0.0"
+        build_version_file = BUILDS_DIR / "build.version"
+        if build_version_file.exists():
+            local_version = build_version_file.read_text().strip()
+
+        if local_version == server_version:
+            logger.debug("sync_mirror_self_update: already up to date")
+            return False
+
+        logger.info(f"sync_mirror_self_update: local={local_version}, server={server_version}")
+
+        # Parse versions
+        def parse_ver(v: str) -> tuple:
+            try:
+                return tuple(int(x) for x in v.split("."))
+            except Exception:
+                return (0, 0, 0)
+
+        if not (parse_ver(server_version) > parse_ver(local_version)):
+            logger.debug("sync_mirror_self_update: server version not newer")
+            return False
+
+        # Get latest ZIP info from the version endpoint
+        zip_filename = None
+        zip_info = version_info.get("all_zips", [])
+        if zip_info:
+            zip_filename = zip_info[0].get("filename")
+
+        if not zip_filename:
+            logger.warning("sync_mirror_self_update: no ZIP found in version info")
+            return False
+
+        # Download the new launcher ZIP to a temp file
+        logger.info(f"sync_mirror_self_update: downloading {zip_filename}")
+        zip_url = f"{main_url}/launcher/download/zip/{zip_filename}"
+        zip_path = BUILDS_DIR / f".sync_{zip_filename}"
+
+        resp = await client.get(zip_url, timeout=300)
+        resp.raise_for_status()
+        zip_path.write_bytes(resp.content)
+        logger.info(f"sync_mirror_self_update: downloaded {len(resp.content)} bytes")
+
+        # Extract to a temp directory
+        import zipfile
+        import tempfile
+        import shutil
+
+        with tempfile.TemporaryDirectory() as tmpdir:
+            extract_dir = Path(tmpdir) / "extracted"
+            extract_dir.mkdir(parents=True)
+
+            with zipfile.ZipFile(zip_path) as zf:
+                zf.extractall(extract_dir)
+
+            # Move extracted files to builds directory, replacing old ones
+            moved = 0
+            for item in extract_dir.rglob("*"):
+                if item.is_file() and item.name not in ("meta.json", "build.version"):
+                    rel = item.relative_to(extract_dir)
+                    target = BUILDS_DIR / rel
+                    target.parent.mkdir(parents=True, exist_ok=True)
+                    try:
+                        shutil.copy2(item, target)
+                        moved += 1
+                    except Exception as e:
+                        logger.warning(f"  Failed to copy {rel}: {e}")
+
+            logger.info(f"sync_mirror_self_update: moved {moved} files")
+
+        # Clean up temp ZIP
+        zip_path.unlink(missing_ok=True)
+
+        # Update version file
+        build_version_file.write_text(server_version)
+        logger.info(f"sync_mirror_self_update: updated to v{server_version}")
+
+        # Regenerate meta for the new version
+        generate_launcher_builds_meta()
+        extract_new_format_versions()
+
+        # Write a restart flag so the process manager can restart the server
+        restart_flag = BUILDS_DIR / ".restart-required"
+        restart_flag.write_text(server_version)
+        logger.warning(f"sync_mirror_self_update: restart flag written ({restart_flag})")
+        logger.warning("sync_mirror_self_update: server restart recommended to pick up new launcher files")
+
+        return True
+
+    except Exception as e:
+        logger.warning(f"sync_mirror_self_update error: {e}")
+        return False
+
 
 # ====================== ШАБЛОН СТРАНИЦЫ АКТИВАЦИИ ======================
 ACTIVATE_PASS_HTML = """
@@ -647,10 +813,12 @@ class CacheControlMiddleware:
             await self.app(scope, receive, send)
             return
 
-        async def send_wrapper(status, headers, *args, **kwargs):
-            cache_headers = [(b"cache-control", b"public, max-age=86400")]
-            headers = list(headers) + cache_headers
-            await send(status, headers, *args, **kwargs)
+        async def send_wrapper(message):
+            if message.get("type") == "http.response.start":
+                headers = message.get("headers", [])
+                cache_headers = [(b"cache-control", b"public, max-age=86400")]
+                message["headers"] = list(headers) + cache_headers
+            await send(message)
 
         await self.app(scope, receive, send_wrapper)
 
@@ -840,7 +1008,7 @@ async def list_packs(
                     with open(meta_path, 'r', encoding='utf-8') as f:
                         meta = json.load(f)
                         updated_at = meta.get("updated_at")
-                        if updated_at and isinstance(updated_at, datetime):
+                        if isinstance(updated_at, datetime):
                             updated_at = updated_at.isoformat()
                     
                     desc_path = pack_dir / "description.txt"
@@ -997,8 +1165,10 @@ async def get_pack_manifest(pack_name: str, request: Request, current_user: dict
 
 
 @app.get("/pack/{pack_name}/file/{file_path:path}")
-async def get_pack_file(pack_name: str, file_path: str, request: Request):
+async def get_pack_file(pack_name: str, file_path: str, request: Request, current_user: dict = Depends(get_current_user)):
     """Get a file from a pack"""
+    if not has_permission(current_user["role"], Permissions.DOWNLOAD_PACK):
+        raise HTTPException(403, "Requires active pass")
     full_path = PACKS_DIR / pack_name / file_path
     client_ip = request.client.host if request.client else None
     
@@ -1044,8 +1214,6 @@ def get_current_launcher_version() -> str:
 
 def parse_version(version_str: str) -> dict:
     """Parse version string to determine if it's new or legacy format"""
-    import re
-    
     match = re.match(r'^(\d+)\.(\d+)\.(\d+)(.*)$', version_str)
     if not match:
         return {"major": 0, "minor": 0, "patch": 0, "suffix": version_str, "is_legacy": True}
@@ -1073,7 +1241,6 @@ def is_new_format(filename: str) -> bool:
 
 def calculate_file_hash(file_path: Path) -> str:
     """Calculate SHA256 hash of a file"""
-    import hashlib
     hash_sha = hashlib.sha256()
     with open(file_path, 'rb') as f:
         while chunk := f.read(8192):
@@ -1083,8 +1250,6 @@ def calculate_file_hash(file_path: Path) -> str:
 
 def generate_launcher_builds_meta():
     """Generate meta.json in builds/ directory for incremental updates"""
-    import hashlib
-    
     version = get_current_launcher_version()
     if not version:
         return
@@ -1167,7 +1332,6 @@ def scan_launcher_version(version: str) -> Optional[dict]:
     # Check cache first
     if meta_path.exists():
         try:
-            import json
             with open(meta_path, 'r', encoding='utf-8') as f:
                 return json.load(f)
         except Exception:
@@ -1195,7 +1359,6 @@ def scan_launcher_version(version: str) -> Optional[dict]:
     
     # Save meta
     try:
-        import json
         with open(meta_path, 'w', encoding='utf-8') as f:
             json.dump(meta, f, indent=2)
     except Exception as e:
@@ -1614,7 +1777,7 @@ async def get_launcher_file(version: str, file_path: str, request: Request):
     return await send_file_async(full_path, request, cache=True)
 
 
-@app.get("/launcher/download/zip/{version}")
+@app.get("/launcher/download/zip/version/{version}")
 async def download_launcher_zip_version(version: str, request: Request = None):
     """Download full ZIP for specific version (for new installs)"""
     zip_path = BUILDS_DIR / f"ZernMC-win-{version}.zip"
@@ -2142,10 +2305,8 @@ if __name__ == "__main__":
     args = parse_args()
 
     if args.test:
-        import asyncio
         asyncio.run(run_test_mode())
     elif args.sync:
-        import asyncio
         asyncio.run(run_sync_mode())
     elif args.dev:
         run_development_mode(args.host, args.port, args.reload)