feat：在子进程中操作文件

app/modules/filemanager/transhandler.py

@@ -1,4 +1,8 @@
+import multiprocessing
+import os
 import re
+import shutil
+import sys
 from pathlib import Path
 from threading import Lock
 from typing import Optional, List, Tuple
@@ -15,9 +19,9 @@ from app.helper.message import TemplateHelper
 from app.log import logger
 from app.modules.filemanager.storages import StorageBase
 from app.schemas import TransferInfo, TmdbEpisode, TransferDirectoryConf, FileItem, TransferInterceptEventData
+from app.schemas import TransferRenameEventData
 from app.schemas.types import MediaType, ChainEventType
 from app.utils.system import SystemUtils
-from app.schemas import TransferRenameEventData
 
 lock = Lock()
 
@@ -239,7 +243,8 @@ class TransHandler:
                             overflag = True
                     if not overflag:
                         # 目标文件已存在
-                        logger.info(f"目的文件系统中已经存在同名文件 {target_file}，当前整理覆盖模式设置为 {overwrite_mode}")
+                        logger.info(
+                            f"目的文件系统中已经存在同名文件 {target_file}，当前整理覆盖模式设置为 {overwrite_mode}")
                         if overwrite_mode == 'always':
                             # 总是覆盖同名文件
                             overflag = True
@@ -323,127 +328,118 @@ class TransHandler:
         :param target_file: 目标文件路径
         :param transfer_type: 整理方式
         """
-
-        def __get_targetitem(_path: Path) -> FileItem:
-            """
-            获取文件信息
-            """
-            return FileItem(
-                storage=target_storage,
-                path=_path.as_posix(),
-                name=_path.name,
-                basename=_path.stem,
-                type="file",
-                size=_path.stat().st_size,
-                extension=_path.suffix.lstrip('.'),
-                modify_time=_path.stat().st_mtime
-            )
-
         if (fileitem.storage != target_storage
                 and fileitem.storage != "local" and target_storage != "local"):
             return None, f"不支持 {fileitem.storage} 到 {target_storage} 的文件整理"
 
-        # 加锁
-        with lock:
-            if fileitem.storage == "local" and target_storage == "local":
-                # 创建目录
-                if not target_file.parent.exists():
-                    target_file.parent.mkdir(parents=True)
-                # 本地到本地
-                if transfer_type == "copy":
-                    state = source_oper.copy(fileitem, target_file.parent, target_file.name)
-                elif transfer_type == "move":
-                    state = source_oper.move(fileitem, target_file.parent, target_file.name)
-                elif transfer_type == "link":
-                    state = source_oper.link(fileitem, target_file)
-                elif transfer_type == "softlink":
-                    state = source_oper.softlink(fileitem, target_file)
-                else:
-                    return None, f"不支持的整理方式：{transfer_type}"
-                if state:
-                    return __get_targetitem(target_file), ""
-                else:
-                    return None, f"{fileitem.path} {transfer_type} 失败"
-            elif fileitem.storage == "local" and target_storage != "local":
-                # 本地到网盘
-                filepath = Path(fileitem.path)
-                if not filepath.exists():
-                    return None, f"文件 {filepath} 不存在"
-                if transfer_type == "copy":
-                    # 复制
-                    # 根据目的路径创建文件夹
-                    target_fileitem = target_oper.get_folder(target_file.parent)
-                    if target_fileitem:
-                        # 上传文件
-                        new_item = target_oper.upload(target_fileitem, filepath, target_file.name)
-                        if new_item:
-                            return new_item, ""
-                        else:
-                            return None, f"{fileitem.path} 上传 {target_storage} 失败"
+        def _do_transfer() -> Tuple[bool, str]:
+            """
+            执行文件整理
+            """
+            try:
+                if fileitem.storage == "local" and target_storage == "local":
+                    if not target_file.parent.exists():
+                        target_file.parent.mkdir(parents=True)
+                    if transfer_type == "copy":
+                        shutil.copy2(fileitem.path, target_file.as_posix())
+                    elif transfer_type == "move":
+                        SystemUtils.move(Path(fileitem.path), target_file)
+                    elif transfer_type == "link":
+                        os.link(fileitem.path, target_file)
+                    elif transfer_type == "softlink":
+                        os.symlink(fileitem.path, target_file)
                     else:
-                        return None, f"【{target_storage}】{target_file.parent} 目录获取失败"
-                elif transfer_type == "move":
-                    # 移动
-                    # 根据目的路径获取文件夹
-                    target_fileitem = target_oper.get_folder(target_file.parent)
-                    if target_fileitem:
-                        # 上传文件
+                        return False, f"不支持的整理方式：{transfer_type}"
+                    return True, ""
+                elif fileitem.storage == "local" and target_storage != "local":
+                    filepath = Path(fileitem.path)
+                    if not filepath.exists():
+                        return False, f"文件 {filepath} 不存在"
+                    if transfer_type in ["copy", "move"]:
+                        target_fileitem = target_oper.get_folder(target_file.parent)
+                        if not target_fileitem:
+                            return False, f"【{target_storage}】{target_file.parent} 目录获取失败"
                         new_item = target_oper.upload(target_fileitem, filepath, target_file.name)
-                        if new_item:
-                            # 删除源文件
+                        if not new_item:
+                            return False, f"{fileitem.path} 上传 {target_storage} 失败"
+                        if transfer_type == "move":
                             source_oper.delete(fileitem)
-                            return new_item, ""
-                        else:
-                            return None, f"{fileitem.path} 上传 {target_storage} 失败"
+                        return True, ""
                     else:
-                        return None, f"【{target_storage}】{target_file.parent} 目录获取失败"
-            elif fileitem.storage != "local" and target_storage == "local":
-                # 网盘到本地
-                if target_file.exists():
-                    logger.warn(f"文件已存在：{target_file}")
-                    return __get_targetitem(target_file), ""
-                # 网盘到本地
-                if transfer_type in ["copy", "move"]:
-                    # 下载
-                    tmp_file = source_oper.download(fileitem=fileitem, path=target_file.parent)
-                    if tmp_file:
-                        # 创建目录
+                        return False, f"不支持的整理方式：{transfer_type}"
+                elif fileitem.storage != "local" and target_storage == "local":
+                    if target_file.exists():
+                        logger.warn(f"文件已存在：{target_file}")
+                        return True, ""
+                    if transfer_type in ["copy", "move"]:
+                        tmp_file = source_oper.download(fileitem=fileitem, path=target_file.parent)
+                        if not tmp_file:
+                            return False, f"{fileitem.path} {fileitem.storage} 下载失败"
                         if not target_file.parent.exists():
                             target_file.parent.mkdir(parents=True)
-                        # 将tmp_file移动后target_file
                         SystemUtils.move(tmp_file, target_file)
                         if transfer_type == "move":
-                            # 删除源文件
                             source_oper.delete(fileitem)
-                        return __get_targetitem(target_file), ""
+                        return True, ""
                     else:
-                        return None, f"{fileitem.path} {fileitem.storage} 下载失败"
-            elif fileitem.storage == target_storage:
-                # 同一网盘
-                if transfer_type == "copy":
-                    # 复制文件到新目录
+                        return False, f"不支持的整理方式：{transfer_type}"
+                elif fileitem.storage == target_storage:
                     target_fileitem = target_oper.get_folder(target_file.parent)
-                    if target_fileitem:
-                        if source_oper.move(fileitem, Path(target_fileitem.path), target_file.name):
-                            return target_oper.get_item(target_file), ""
-                        else:
-                            return None, f"【{target_storage}】{fileitem.path} 复制文件失败"
+                    if not target_fileitem:
+                        return False, f"【{target_storage}】{target_file.parent} 目录获取失败"
+                    if transfer_type in ["copy", "move"]:
+                        if not source_oper.move(fileitem, Path(target_fileitem.path), target_file.name):
+                            return False, f"【{target_storage}】{fileitem.path} {'复制' if transfer_type == 'copy' else '移动'}文件失败"
+                        return True, ""
                     else:
-                        return None, f"【{target_storage}】{target_file.parent} 目录获取失败"
-                elif transfer_type == "move":
-                    # 移动文件到新目录
-                    target_fileitem = target_oper.get_folder(target_file.parent)
-                    if target_fileitem:
-                        if source_oper.move(fileitem, Path(target_fileitem.path), target_file.name):
-                            return target_oper.get_item(target_file), ""
-                        else:
-                            return None, f"【{target_storage}】{fileitem.path} 移动文件失败"
-                    else:
-                        return None, f"【{target_storage}】{target_file.parent} 目录获取失败"
+                        return False, f"不支持的整理方式：{transfer_type}"
                 else:
-                    return None, f"不支持的整理方式：{transfer_type}"
+                    return False, "未知错误"
+            except Exception as _e:
+                return False, str(_e)
 
-        return None, "未知错误"
+        def _worker_action():
+            """
+            子进程执行函数
+            """
+            _success, _msg = _do_transfer()
+            if _success:
+                sys.exit(0)
+            logger.error(f"子进程执行失败：{_msg}")
+            sys.exit(10)
+
+        # 在新进程中执行以降低内存占用
+        try:
+            ctx = multiprocessing.get_context("fork")
+        except ValueError:
+            ctx = None
+
+        if ctx is not None:
+            # 新进程执行
+            logger.info(f"在新进程中整理文件 {fileitem.path}")
+            proc = ctx.Process(target=_worker_action)
+            # 加锁以避免与当前进程内其他并发调用发生竞争
+            with lock:
+                proc.start()
+                proc.join()
+
+            if proc.exitcode == 0:
+                # 成功
+                item = target_oper.get_item(target_file)
+                if item:
+                    return item, ""
+                return None, f"【{target_storage}】{target_file} 获取失败"
+            else:
+                return None, f"{fileitem.path} {transfer_type} 失败"
+        else:
+            # 当前进程执行
+            success, errmsg = _do_transfer()
+            if success:
+                item = target_oper.get_item(target_file)
+                if item:
+                    return item, ""
+                return None, f"【{target_storage}】{target_file} 获取失败"
+            return None, errmsg
 
     def __transfer_other_files(self, fileitem: FileItem, target_storage: str,
                                source_oper: StorageBase, target_oper: StorageBase,