feat(material-cache): 添加缓存锁机制防止并发冲突

- 实现跨进程缓存锁获取和释放功能
- 在下载过程中使用UUID生成唯一的临时文件名避免并发覆盖
- 添加超时机制和轮询间隔控制锁等待时间
- 修改清理逻辑跳过锁文件和下载中的临时文件
- 添加测试验证缓存锁功能正常工作

fix(ffmpeg): 优化FFmpeg命令执行和错误处理

- 添加默认日志级别为error减少冗余输出
- 修复subprocess运行参数传递方式
- 改进错误信息截取避免空值解码异常

refactor(system-info): 优化系统信息获取和缓存机制

- 实现FFmpeg版本、编解码器信息缓存避免重复查询
- 添加系统信息TTL缓存机制提升性能
- 实现GPU信息检查状态缓存避免重复检测
- 整合静态系统信息和动态信息分离处理

refactor(storage): 优化HTTP上传下载资源管理

- 使用上下文管理器确保请求连接正确关闭
- 修改rclone命令构建方式从字符串改为列表形式
- 改进错误处理截取stderr输出长度限制
- 优化响应处理避免资源泄露

handlers/base.py

@@ -139,6 +139,8 @@ AUDIO_ENCODE_ARGS = [
     '-ac', '2',
 ]
 
+FFMPEG_LOGLEVEL = 'error'
+
 
 def subprocess_args(include_stdout: bool = True) -> Dict[str, Any]:
     """
@@ -486,22 +488,28 @@ class BaseHandler(TaskHandler, ABC):
         if timeout is None:
             timeout = self.config.ffmpeg_timeout
 
+        cmd_to_run = list(cmd)
+        if cmd_to_run and cmd_to_run[0] == 'ffmpeg' and '-loglevel' not in cmd_to_run:
+            cmd_to_run[1:1] = ['-loglevel', FFMPEG_LOGLEVEL]
+
         # 日志记录命令（限制长度）
-        cmd_str = ' '.join(cmd)
+        cmd_str = ' '.join(cmd_to_run)
         if len(cmd_str) > 500:
             cmd_str = cmd_str[:500] + '...'
         logger.info(f"[task:{task_id}] FFmpeg: {cmd_str}")
 
         try:
+            run_args = subprocess_args(False)
+            run_args['stdout'] = subprocess.DEVNULL
+            run_args['stderr'] = subprocess.PIPE
             result = subprocess.run(
-                cmd,
-                capture_output=True,
+                cmd_to_run,
                 timeout=timeout,
-                **subprocess_args(False)
+                **run_args
             )
 
             if result.returncode != 0:
-                stderr = result.stderr.decode('utf-8', errors='replace')[:1000]
+                stderr = (result.stderr or b'').decode('utf-8', errors='replace')[:1000]
                 logger.error(f"[task:{task_id}] FFmpeg failed (code={result.returncode}): {stderr}")
                 return False
 

services/api_client.py

@@ -7,6 +7,7 @@ v2 API 客户端
 
 import logging
 import subprocess
+import time
 import requests
 from typing import Dict, List, Optional, Any
 
@@ -24,6 +25,8 @@ class APIClientV2:
     负责与渲染服务端的所有 HTTP 通信。
     """
 
+    SYSTEM_INFO_TTL_SECONDS = 30
+
     def __init__(self, config: WorkerConfig):
         """
         初始化 API 客户端
@@ -37,6 +40,15 @@ class APIClientV2:
         self.worker_id = config.worker_id
         self.session = requests.Session()
 
+        self._ffmpeg_version: Optional[str] = None
+        self._codec_info: Optional[str] = None
+        self._hw_accel_info: Optional[str] = None
+        self._gpu_info: Optional[str] = None
+        self._gpu_info_checked = False
+        self._static_system_info: Optional[Dict[str, Any]] = None
+        self._system_info_cache: Optional[Dict[str, Any]] = None
+        self._system_info_cache_ts = 0.0
+
         # 设置默认请求头
         self.session.headers.update({
             'Content-Type': 'application/json',
@@ -287,6 +299,8 @@ class APIClientV2:
 
     def _get_ffmpeg_version(self) -> str:
         """获取 FFmpeg 版本"""
+        if self._ffmpeg_version is not None:
+            return self._ffmpeg_version
         try:
             result = subprocess.run(
                 ['ffmpeg', '-version'],
@@ -299,13 +313,18 @@ class APIClientV2:
                 parts = first_line.split()
                 for i, part in enumerate(parts):
                     if part == 'version' and i + 1 < len(parts):
-                        return parts[i + 1]
-            return 'unknown'
+                        self._ffmpeg_version = parts[i + 1]
+                        return self._ffmpeg_version
+            self._ffmpeg_version = 'unknown'
+            return self._ffmpeg_version
         except Exception:
-            return 'unknown'
+            self._ffmpeg_version = 'unknown'
+            return self._ffmpeg_version
 
     def _get_codec_info(self) -> str:
         """获取支持的编解码器信息"""
+        if self._codec_info is not None:
+            return self._codec_info
         try:
             result = subprocess.run(
                 ['ffmpeg', '-codecs'],
@@ -324,37 +343,60 @@ class APIClientV2:
                 codecs.append('aac')
             if 'libfdk_aac' in output:
                 codecs.append('libfdk_aac')
-            return ', '.join(codecs) if codecs else 'unknown'
+            self._codec_info = ', '.join(codecs) if codecs else 'unknown'
+            return self._codec_info
         except Exception:
-            return 'unknown'
+            self._codec_info = 'unknown'
+            return self._codec_info
 
     def _get_system_info(self) -> Dict[str, Any]:
         """获取系统信息"""
         try:
+            now = time.monotonic()
+            if (
+                self._system_info_cache
+                and now - self._system_info_cache_ts < self.SYSTEM_INFO_TTL_SECONDS
+            ):
+                return self._system_info_cache
+
             import platform
             import psutil
 
-            info = {
-                'os': platform.system(),
-                'cpu': f"{psutil.cpu_count()} cores",
-                'memory': f"{psutil.virtual_memory().total // (1024**3)}GB",
+            if self._hw_accel_info is None:
+                self._hw_accel_info = get_hw_accel_info_str()
+
+            if self._static_system_info is None:
+                self._static_system_info = {
+                    'os': platform.system(),
+                    'cpu': f"{psutil.cpu_count()} cores",
+                    'memory': f"{psutil.virtual_memory().total // (1024**3)}GB",
+                    'hwAccelConfig': self.config.hw_accel,  # 当前配置的硬件加速
+                    'hwAccelSupport': self._hw_accel_info,  # 系统支持的硬件加速
+                }
+
+            info = dict(self._static_system_info)
+            info.update({
                 'cpuUsage': f"{psutil.cpu_percent()}%",
                 'memoryAvailable': f"{psutil.virtual_memory().available // (1024**3)}GB",
-                'hwAccelConfig': self.config.hw_accel,  # 当前配置的硬件加速
-                'hwAccelSupport': get_hw_accel_info_str(),  # 系统支持的硬件加速
-            }
+            })
 
             # 尝试获取 GPU 信息
             gpu_info = self._get_gpu_info()
             if gpu_info:
                 info['gpu'] = gpu_info
 
+            self._system_info_cache = info
+            self._system_info_cache_ts = now
             return info
         except Exception:
             return {}
 
     def _get_gpu_info(self) -> Optional[str]:
         """获取 GPU 信息"""
+        if self._gpu_info_checked:
+            return self._gpu_info
+
+        self._gpu_info_checked = True
         try:
             result = subprocess.run(
                 ['nvidia-smi', '--query-gpu=name', '--format=csv,noheader'],
@@ -364,10 +406,11 @@ class APIClientV2:
             )
             if result.returncode == 0:
                 gpu_name = result.stdout.strip().split('\n')[0]
-                return gpu_name
+                self._gpu_info = gpu_name
         except Exception:
-            pass
-        return None
+            self._gpu_info = None
+
+        return self._gpu_info
 
     def close(self):
         """关闭会话"""

services/cache.py

@@ -10,6 +10,7 @@ import hashlib
 import logging
 import shutil
 import time
+import uuid
 from typing import Optional, Tuple
 from urllib.parse import urlparse, unquote
 
@@ -59,6 +60,9 @@ class MaterialCache:
     负责素材文件的缓存存储和检索。
     """
 
+    LOCK_TIMEOUT_SEC = 30.0
+    LOCK_POLL_INTERVAL_SEC = 0.1
+
     def __init__(self, cache_dir: str, enabled: bool = True, max_size_gb: float = 0):
         """
         初始化缓存管理器
@@ -91,6 +95,44 @@ class MaterialCache:
         filename = f"{cache_key}{ext}"
         return os.path.join(self.cache_dir, filename)
 
+    def _get_lock_path(self, cache_key: str) -> str:
+        """获取缓存锁文件路径"""
+        assert self.cache_dir
+        return os.path.join(self.cache_dir, f"{cache_key}.lock")
+
+    def _acquire_lock(self, cache_key: str) -> Optional[str]:
+        """获取缓存锁（跨进程安全）"""
+        if not self.enabled:
+            return None
+
+        lock_path = self._get_lock_path(cache_key)
+        deadline = time.monotonic() + self.LOCK_TIMEOUT_SEC
+
+        while True:
+            try:
+                fd = os.open(lock_path, os.O_CREAT | os.O_EXCL | os.O_WRONLY)
+                os.close(fd)
+                return lock_path
+            except FileExistsError:
+                if time.monotonic() >= deadline:
+                    logger.warning(f"Cache lock timeout: {lock_path}")
+                    return None
+                time.sleep(self.LOCK_POLL_INTERVAL_SEC)
+            except Exception as e:
+                logger.warning(f"Cache lock error: {e}")
+                return None
+
+    def _release_lock(self, lock_path: Optional[str]) -> None:
+        """释放缓存锁"""
+        if not lock_path:
+            return
+        try:
+            os.remove(lock_path)
+        except FileNotFoundError:
+            return
+        except Exception as e:
+            logger.warning(f"Cache lock release error: {e}")
+
     def is_cached(self, url: str) -> Tuple[bool, str]:
         """
         检查素材是否已缓存
@@ -136,63 +178,78 @@ class MaterialCache:
         if not self.enabled:
             return storage.download_file(url, dest, max_retries=max_retries, timeout=timeout)
 
-        # 检查缓存
-        cached, cache_path = self.is_cached(url)
+        cache_key = _extract_cache_key(url)
+        lock_path = self._acquire_lock(cache_key)
+        if not lock_path:
+            logger.warning(f"Cache lock unavailable, downloading without cache: {url[:80]}...")
+            return storage.download_file(url, dest, max_retries=max_retries, timeout=timeout)
 
-        if cached:
-            # 命中缓存，复制到目标路径
-            try:
-                shutil.copy2(cache_path, dest)
-                # 更新访问时间（用于 LRU 清理）
-                os.utime(cache_path, None)
-                file_size = os.path.getsize(dest)
-                logger.info(f"Cache hit: {url[:80]}... -> {dest} ({file_size} bytes)")
-                return True
-            except Exception as e:
-                logger.warning(f"Failed to copy from cache: {e}, will re-download")
-                # 缓存复制失败，删除可能损坏的缓存文件
-                try:
-                    os.remove(cache_path)
-                except Exception:
-                    pass
-
-        # 未命中缓存，下载到缓存目录
-        logger.debug(f"Cache miss: {url[:80]}...")
-
-        # 先下载到临时文件
-        temp_cache_path = cache_path + '.downloading'
         try:
-            if not storage.download_file(url, temp_cache_path, max_retries=max_retries, timeout=timeout):
-                # 下载失败，清理临时文件
-                if os.path.exists(temp_cache_path):
-                    os.remove(temp_cache_path)
-                return False
+            cache_path = self.get_cache_path(url)
+            cached = os.path.exists(cache_path) and os.path.getsize(cache_path) > 0
 
-            # 下载成功，移动到正式缓存路径
-            if os.path.exists(cache_path):
-                os.remove(cache_path)
-            os.rename(temp_cache_path, cache_path)
-
-            # 复制到目标路径
-            shutil.copy2(cache_path, dest)
-            file_size = os.path.getsize(dest)
-            logger.info(f"Downloaded and cached: {url[:80]}... ({file_size} bytes)")
-
-            # 检查是否需要清理缓存
-            if self.max_size_bytes > 0:
-                self._cleanup_if_needed()
-
-            return True
-
-        except Exception as e:
-            logger.error(f"Cache download error: {e}")
-            # 清理临时文件
-            if os.path.exists(temp_cache_path):
+            if cached:
+                # 命中缓存，复制到目标路径
                 try:
-                    os.remove(temp_cache_path)
-                except Exception:
-                    pass
-            return False
+                    shutil.copy2(cache_path, dest)
+                    # 更新访问时间（用于 LRU 清理）
+                    os.utime(cache_path, None)
+                    file_size = os.path.getsize(dest)
+                    logger.info(f"Cache hit: {url[:80]}... -> {dest} ({file_size} bytes)")
+                    return True
+                except Exception as e:
+                    logger.warning(f"Failed to copy from cache: {e}, will re-download")
+                    # 缓存复制失败，删除可能损坏的缓存文件
+                    try:
+                        os.remove(cache_path)
+                    except Exception:
+                        pass
+
+            # 未命中缓存，下载到缓存目录
+            logger.debug(f"Cache miss: {url[:80]}...")
+
+            # 先下载到临时文件（唯一文件名，避免并发覆盖）
+            temp_cache_path = os.path.join(
+                self.cache_dir,
+                f"{cache_key}.{uuid.uuid4().hex}.downloading"
+            )
+            try:
+                if not storage.download_file(url, temp_cache_path, max_retries=max_retries, timeout=timeout):
+                    # 下载失败，清理临时文件
+                    if os.path.exists(temp_cache_path):
+                        os.remove(temp_cache_path)
+                    return False
+
+                if not os.path.exists(temp_cache_path) or os.path.getsize(temp_cache_path) <= 0:
+                    if os.path.exists(temp_cache_path):
+                        os.remove(temp_cache_path)
+                    return False
+
+                # 下载成功，原子替换缓存文件
+                os.replace(temp_cache_path, cache_path)
+
+                # 复制到目标路径
+                shutil.copy2(cache_path, dest)
+                file_size = os.path.getsize(dest)
+                logger.info(f"Downloaded and cached: {url[:80]}... ({file_size} bytes)")
+
+                # 检查是否需要清理缓存
+                if self.max_size_bytes > 0:
+                    self._cleanup_if_needed()
+
+                return True
+
+            except Exception as e:
+                logger.error(f"Cache download error: {e}")
+                # 清理临时文件
+                if os.path.exists(temp_cache_path):
+                    try:
+                        os.remove(temp_cache_path)
+                    except Exception:
+                        pass
+                return False
+        finally:
+            self._release_lock(lock_path)
 
     def _cleanup_if_needed(self) -> None:
         """
@@ -209,7 +266,7 @@ class MaterialCache:
             total_size = 0
 
             for filename in os.listdir(self.cache_dir):
-                if filename.endswith('.downloading'):
+                if filename.endswith('.downloading') or filename.endswith('.lock'):
                     continue
                 file_path = os.path.join(self.cache_dir, filename)
                 if os.path.isfile(file_path):
@@ -275,7 +332,7 @@ class MaterialCache:
         total_size = 0
 
         for filename in os.listdir(self.cache_dir):
-            if filename.endswith('.downloading'):
+            if filename.endswith('.downloading') or filename.endswith('.lock'):
                 continue
             file_path = os.path.join(self.cache_dir, filename)
             if os.path.isfile(file_path):

services/storage.py

@@ -7,6 +7,7 @@
 
 import os
 import logging
+import subprocess
 from typing import Optional
 
 import requests
@@ -73,16 +74,16 @@ def upload_file(url: str, file_path: str, max_retries: int = 5, timeout: int = 6
     while retries < max_retries:
         try:
             with open(file_path, 'rb') as f:
-                response = requests.put(
+                with requests.put(
                     http_url,
                     data=f,
                     stream=True,
                     timeout=timeout,
                     headers={"Content-Type": "application/octet-stream"}
-                )
-                response.raise_for_status()
-                logger.info(f"Upload succeeded: {file_path}")
-                return True
+                ) as response:
+                    response.raise_for_status()
+                    logger.info(f"Upload succeeded: {file_path}")
+                    return True
 
         except requests.exceptions.Timeout:
             retries += 1
@@ -111,7 +112,6 @@ def _upload_with_rclone(url: str, file_path: str) -> bool:
         return False
 
     config_file = os.getenv("RCLONE_CONFIG_FILE", "")
-    rclone_config = f"--config {config_file}" if config_file else ""
 
     # 替换 URL
     new_url = url
@@ -123,19 +123,30 @@ def _upload_with_rclone(url: str, file_path: str) -> bool:
     if new_url == url:
         return False
 
-    cmd = (
-        f"rclone copyto --no-check-dest --ignore-existing "
-        f"--multi-thread-chunk-size 8M --multi-thread-streams 8 "
-        f"{rclone_config} {file_path} {new_url}"
-    )
-    logger.debug(f"rclone command: {cmd}")
+    cmd = [
+        "rclone",
+        "copyto",
+        "--no-check-dest",
+        "--ignore-existing",
+        "--multi-thread-chunk-size",
+        "8M",
+        "--multi-thread-streams",
+        "8",
+    ]
+    if config_file:
+        cmd.extend(["--config", config_file])
+    cmd.extend([file_path, new_url])
 
-    result = os.system(cmd)
-    if result == 0:
+    logger.debug(f"rclone command: {' '.join(cmd)}")
+
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    if result.returncode == 0:
         logger.info(f"rclone upload succeeded: {file_path}")
         return True
 
-    logger.warning(f"rclone upload failed (code={result}): {file_path}")
+    stderr = (result.stderr or '').strip()
+    stderr = stderr[:500] if stderr else ""
+    logger.warning(f"rclone upload failed (code={result.returncode}): {file_path} {stderr}")
     return False
 
 
@@ -177,13 +188,13 @@ def download_file(
     retries = 0
     while retries < max_retries:
         try:
-            response = requests.get(http_url, timeout=timeout, stream=True)
-            response.raise_for_status()
+            with requests.get(http_url, timeout=timeout, stream=True) as response:
+                response.raise_for_status()
 
-            with open(file_path, 'wb') as f:
-                for chunk in response.iter_content(chunk_size=8192):
-                    if chunk:
-                        f.write(chunk)
+                with open(file_path, 'wb') as f:
+                    for chunk in response.iter_content(chunk_size=8192):
+                        if chunk:
+                            f.write(chunk)
 
             file_size = os.path.getsize(file_path)
             logger.info(f"Download succeeded: {file_path} ({file_size} bytes)")

services/task_executor.py

@@ -137,6 +137,14 @@ class TaskExecutor:
                 logger.warning(f"[task:{task.task_id}] Task already running, skipping")
                 return False
 
+            # 检查并发上限
+            if len(self.current_tasks) >= self.config.max_concurrency:
+                logger.info(
+                    f"[task:{task.task_id}] Max concurrency reached "
+                    f"({self.config.max_concurrency}), rejecting task"
+                )
+                return False
+
             # 检查是否有对应的处理器
             if task.task_type not in self.handlers:
                 logger.error(f"[task:{task.task_id}] No handler for type: {task.task_type.value}")

tests/unit/test_material_cache_lock.py

@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+
+import os
+
+from services.cache import MaterialCache, _extract_cache_key
+
+
+def test_cache_lock_acquire_release(tmp_path):
+    cache = MaterialCache(cache_dir=str(tmp_path), enabled=True, max_size_gb=0)
+    cache_key = _extract_cache_key("https://example.com/path/file.mp4?token=abc")
+    lock_path = cache._acquire_lock(cache_key)
+    assert lock_path
+    assert os.path.exists(lock_path)
+    cache._release_lock(lock_path)
+    assert not os.path.exists(lock_path)