fix: enforce max_concurrent and global speed-limit distribution

mod_queue.py

@@ -5,6 +5,7 @@ import os
 import time
 import threading
 import traceback
+import re
 from datetime import datetime
 from typing import Optional, Dict, Any, List, Callable
 from enum import Enum
@@ -46,6 +47,8 @@ class ModuleQueue(PluginModuleBase):
     # 진행 중인 다운로드 인스턴스들
     _downloads: Dict[str, 'DownloadTask'] = {}
     _queue_lock = threading.Lock()
+    _concurrency_sem: Optional[threading.Semaphore] = None
+    _concurrency_limit: int = 0
     
     # 업데이트 체크 캐싱
     _last_update_check = 0
@@ -55,6 +58,32 @@ class ModuleQueue(PluginModuleBase):
         from .setup import default_route_socketio_module
         super(ModuleQueue, self).__init__(P, name='queue', first_menu='list')
         default_route_socketio_module(self, attach='/queue')
+        self._ensure_concurrency_limit()
+
+    @classmethod
+    def _ensure_concurrency_limit(cls):
+        """max_concurrent 설정 기반 동시 실행 슬롯 보장"""
+        try:
+            from .setup import P
+            configured = int(P.ModelSetting.get('max_concurrent') or 3)
+        except Exception:
+            configured = 3
+        configured = max(1, configured)
+
+        if cls._concurrency_sem is None:
+            cls._concurrency_sem = threading.Semaphore(configured)
+            cls._concurrency_limit = configured
+            return
+
+        if cls._concurrency_limit != configured:
+            # 실행 중 태스크가 없을 때만 세마포어 재생성
+            active = any(
+                t.status == DownloadStatus.DOWNLOADING and not t._cancelled
+                for t in cls._downloads.values()
+            )
+            if not active:
+                cls._concurrency_sem = threading.Semaphore(configured)
+                cls._concurrency_limit = configured
 
     
     def process_menu(self, page_name: str, req: Any) -> Any:
@@ -459,6 +488,7 @@ class ModuleQueue(PluginModuleBase):
     def plugin_load(self) -> None:
         """플러그인 로드 시 초기화"""
         self.P.logger.info('gommi_downloader 플러그인 로드')
+        self._ensure_concurrency_limit()
         try:
             # DB에서 진행 중인 작업 로드
             with F.app.app_context():
@@ -671,9 +701,35 @@ class DownloadTask:
         """다운로드 시작 (비동기)"""
         self._thread = threading.Thread(target=self._run, daemon=True)
         self._thread.start()
+
+    @staticmethod
+    def _rate_to_bps(rate_value: Any) -> float:
+        """'6M'/'900K' 형태를 bytes/sec로 변환"""
+        if rate_value is None:
+            return 0.0
+        value = str(rate_value).strip().upper()
+        if not value or value in ('0', 'UNLIMITED'):
+            return 0.0
+        m = re.match(r'^(\d+(?:\.\d+)?)\s*([KMG])(?:I?B)?$', value)
+        if not m:
+            return 0.0
+        num = float(m.group(1))
+        unit = m.group(2)
+        mul = {'K': 1024, 'M': 1024 ** 2, 'G': 1024 ** 3}[unit]
+        return num * mul
+
+    @staticmethod
+    def _bps_to_rate(bps: float) -> str:
+        """bytes/sec를 yt-dlp/aria2 형식 문자열로 변환"""
+        if bps <= 0:
+            return '0'
+        if bps >= 1024 ** 2:
+            return f'{max(0.1, bps / (1024 ** 2)):.2f}M'
+        return f'{max(1.0, bps / 1024):.2f}K'
     
     def _run(self):
         """다운로드 실행"""
+        slot_acquired = False
         try:
             self.status = DownloadStatus.EXTRACTING
             if not self.start_time:
@@ -686,9 +742,57 @@ class DownloadTask:
             
             if not self._downloader:
                 raise Exception(f"지원하지 않는 소스 타입: {self.source_type}")
+
+            # 동시 다운로드 제한 슬롯 획득
+            ModuleQueue._ensure_concurrency_limit()
+            sem = ModuleQueue._concurrency_sem
+            if sem is not None:
+                while not self._cancelled:
+                    if sem.acquire(timeout=0.5):
+                        slot_acquired = True
+                        break
+                if not slot_acquired:
+                    self.status = DownloadStatus.CANCELLED
+                    self._emit_status()
+                    return
             
             self.status = DownloadStatus.DOWNLOADING
             self._emit_status()
+
+            # 전역 설정값을 태스크 옵션에 주입 (개별 호출 옵션이 있으면 우선)
+            from .setup import P
+            runtime_options = dict(self.options or {})
+            if not runtime_options.get('aria2c_path'):
+                runtime_options['aria2c_path'] = P.ModelSetting.get('aria2c_path')
+            if not runtime_options.get('connections'):
+                try:
+                    runtime_options['connections'] = int(P.ModelSetting.get('aria2c_connections') or 16)
+                except Exception:
+                    runtime_options['connections'] = 16
+            if not runtime_options.get('ffmpeg_path'):
+                runtime_options['ffmpeg_path'] = P.ModelSetting.get('ffmpeg_path')
+            if not runtime_options.get('max_download_rate'):
+                runtime_options['max_download_rate'] = P.ModelSetting.get('max_download_rate')
+
+            # 전체 속도 제한을 활성 다운로드 수에 따라 분배 (합산 속도 상한)
+            raw_global_rate = runtime_options.get('max_download_rate')
+            global_bps = self._rate_to_bps(raw_global_rate)
+            if global_bps > 0:
+                with ModuleQueue._queue_lock:
+                    active_count = sum(
+                        1
+                        for t in ModuleQueue._downloads.values()
+                        if t.status == DownloadStatus.DOWNLOADING and not t._cancelled
+                    )
+                active_count = max(1, active_count)
+                effective_bps = global_bps / active_count
+                runtime_options['effective_max_download_rate'] = self._bps_to_rate(effective_bps)
+                runtime_options['is_global_rate_split'] = active_count > 1
+                if active_count > 1:
+                    P.logger.info(
+                        f'[GDM] Global speed split: total={raw_global_rate}/s, '
+                        f'active={active_count}, per-task={runtime_options["effective_max_download_rate"]}/s'
+                    )
             
             # 다운로드 실행
             result = self._downloader.download(
@@ -697,7 +801,7 @@ class DownloadTask:
                 filename=self.filename,
                 progress_callback=self._progress_callback,
                 info_callback=self._info_update_callback,
-                **self.options
+                **runtime_options
             )
             
             if self._cancelled:
@@ -741,6 +845,11 @@ class DownloadTask:
             self._cleanup_if_empty()
         
         finally:
+            if slot_acquired and ModuleQueue._concurrency_sem is not None:
+                try:
+                    ModuleQueue._concurrency_sem.release()
+                except Exception:
+                    pass
             self._emit_status()
     
     def _progress_callback(self, progress: int, speed: str = '', eta: str = ''):