refactor: optimize backend module

domain/adapters/providers/__init__.py

@@ -0,0 +1,3 @@
+from .base import BaseAdapter
+
+__all__ = ["BaseAdapter"]

domain/adapters/providers/base.py

@@ -0,0 +1,24 @@
+from __future__ import annotations
+from typing import List, Dict, Protocol, runtime_checkable, Tuple, AsyncIterator
+from models import StorageAdapter
+
+# 约定：任意新适配器模块需定义:
+# ADAPTER_TYPE: str
+# CONFIG_SCHEMA: List[Dict]
+# ADAPTER_FACTORY: Callable[[StorageAdapter], BaseAdapter] (可省略, 会自动寻找 *Adapter 类)
+
+@runtime_checkable
+class BaseAdapter(Protocol):
+    record: StorageAdapter
+    async def list_dir(self, root: str, rel: str, page_num: int = 1, page_size: int = 50, sort_by: str = "name", sort_order: str = "asc") -> Tuple[List[Dict], int]: ...
+    async def read_file(self, root: str, rel: str) -> bytes: ...
+    async def write_file(self, root: str, rel: str, data: bytes): ...
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]): ... 
+    async def mkdir(self, root: str, rel: str): ...
+    async def delete(self, root: str, rel: str): ...
+    async def move(self, root: str, src_rel: str, dst_rel: str): ...
+    async def rename(self, root: str, src_rel: str, dst_rel: str): ... 
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False): ...
+    async def stream_file(self, root: str, rel: str, range_header: str | None): ...
+    async def stat_file(self, root: str, rel: str): ...
+    def get_effective_root(self, sub_path: str | None) -> str: ...

domain/adapters/providers/ftp.py

@@ -0,0 +1,614 @@
+from __future__ import annotations
+
+import asyncio
+from dataclasses import dataclass
+from typing import List, Dict, Tuple, AsyncIterator, Optional
+
+from fastapi import HTTPException
+from fastapi.responses import StreamingResponse
+from ftplib import FTP, error_perm
+import mimetypes
+
+from models import StorageAdapter
+
+
+def _join_remote(root: str, rel: str) -> str:
+    root = (root or "/").rstrip("/") or "/"
+    rel = (rel or "").lstrip("/")
+    if not rel:
+        return root
+    return f"{root}/{rel}"
+
+
+def _parse_mlst_line(line: str) -> Dict[str, str]:
+    out: Dict[str, str] = {}
+    try:
+        facts, _, name = line.partition(" ")
+        for part in facts.split(";"):
+            if not part or "=" not in part:
+                continue
+            k, v = part.split("=", 1)
+            out[k.strip().lower()] = v.strip()
+        if name:
+            out["name"] = name.strip()
+    except Exception:
+        pass
+    return out
+
+
+def _parse_modify_to_epoch(mod: str) -> int:
+    # Formats we may see: YYYYMMDDHHMMSS or YYYYMMDDHHMMSS(.sss)
+    try:
+        mod = mod.strip()
+        mod = mod.split(".")[0]
+        if len(mod) >= 14:
+            y = int(mod[0:4])
+            m = int(mod[4:6])
+            d = int(mod[6:8])
+            hh = int(mod[8:10])
+            mm = int(mod[10:12])
+            ss = int(mod[12:14])
+            import datetime as _dt
+            return int(_dt.datetime(y, m, d, hh, mm, ss, tzinfo=_dt.timezone.utc).timestamp())
+    except Exception:
+        return 0
+    return 0
+
+
+@dataclass
+class _Range:
+    start: int
+    end: Optional[int]  # inclusive
+
+
+class FTPAdapter:
+    def __init__(self, record: StorageAdapter):
+        self.record = record
+        cfg = record.config
+        self.host: str = cfg.get("host")
+        self.port: int = int(cfg.get("port", 21))
+        self.username: Optional[str] = cfg.get("username")
+        self.password: Optional[str] = cfg.get("password")
+        self.passive: bool = bool(cfg.get("passive", True))
+        self.timeout: int = int(cfg.get("timeout", 15))
+        self.root_path: str = cfg.get("root", "/") or "/"
+
+        if not self.host:
+            raise ValueError("FTP adapter requires 'host'")
+
+    def get_effective_root(self, sub_path: str | None) -> str:
+        base = self.root_path.rstrip("/") or "/"
+        if sub_path:
+            return _join_remote(base, sub_path)
+        return base
+
+    def _connect(self) -> FTP:
+        ftp = FTP()
+        ftp.connect(self.host, self.port, timeout=self.timeout)
+        if self.username:
+            ftp.login(self.username, self.password or "")
+        else:
+            ftp.login()
+        ftp.set_pasv(self.passive)
+        return ftp
+
+    async def list_dir(self, root: str, rel: str, page_num: int = 1, page_size: int = 50, sort_by: str = "name", sort_order: str = "asc") -> Tuple[List[Dict], int]:
+        path = _join_remote(root, rel.strip('/'))
+
+        def _do_list() -> List[Dict]:
+            ftp = self._connect()
+            try:
+                ftp.cwd(path)
+            except error_perm as e:
+                # path may be file
+                ftp.quit()
+                raise NotADirectoryError(rel) from e
+
+            entries: List[Dict] = []
+            # Try MLSD first
+            try:
+                for name, facts in ftp.mlsd():
+                    if name in (".", ".."):
+                        continue
+                    is_dir = (facts.get("type") == "dir")
+                    size = int(facts.get("size") or 0)
+                    mtime = _parse_modify_to_epoch(facts.get("modify") or "")
+                    entries.append({
+                        "name": name,
+                        "is_dir": is_dir,
+                        "size": 0 if is_dir else size,
+                        "mtime": mtime,
+                        "type": "dir" if is_dir else "file",
+                    })
+                ftp.quit()
+                return entries
+            except Exception:
+                # Fallback to NLST + probing
+                pass
+
+            names = []
+            try:
+                names = ftp.nlst()
+            except Exception:
+                ftp.quit()
+                return []
+
+            for name in names:
+                if name in (".", ".."):
+                    continue
+                is_dir = False
+                size = 0
+                mtime = 0
+                try:
+                    # If we can CWD, it's a directory
+                    ftp.cwd(_join_remote(path, name))
+                    ftp.cwd(path)
+                    is_dir = True
+                except Exception:
+                    is_dir = False
+                    try:
+                        size = ftp.size(_join_remote(path, name)) or 0
+                    except Exception:
+                        size = 0
+                try:
+                    mdtm = ftp.sendcmd("MDTM " + _join_remote(path, name))
+                    # Example: '213 20241012XXXXXX'
+                    if mdtm.startswith("213 "):
+                        mtime = _parse_modify_to_epoch(mdtm.split(" ", 1)[1])
+                except Exception:
+                    pass
+                entries.append({
+                    "name": name,
+                    "is_dir": is_dir,
+                    "size": 0 if is_dir else int(size or 0),
+                    "mtime": int(mtime or 0),
+                    "type": "dir" if is_dir else "file",
+                })
+            ftp.quit()
+            return entries
+
+        entries = await asyncio.to_thread(_do_list)
+
+        reverse = sort_order.lower() == "desc"
+
+        def get_sort_key(item):
+            key = (not item["is_dir"],)
+            f = sort_by.lower()
+            if f == "name":
+                key += (item["name"].lower(),)
+            elif f == "size":
+                key += (item.get("size", 0),)
+            elif f == "mtime":
+                key += (item.get("mtime", 0),)
+            else:
+                key += (item["name"].lower(),)
+            return key
+
+        entries.sort(key=get_sort_key, reverse=reverse)
+        total = len(entries)
+        start = (page_num - 1) * page_size
+        end = start + page_size
+        return entries[start:end], total
+
+    async def read_file(self, root: str, rel: str) -> bytes:
+        path = _join_remote(root, rel)
+
+        def _do_read() -> bytes:
+            ftp = self._connect()
+            try:
+                chunks: List[bytes] = []
+                ftp.retrbinary("RETR " + path, lambda b: chunks.append(b))
+                return b"".join(chunks)
+            except error_perm as e:
+                if str(e).startswith("550"):
+                    raise FileNotFoundError(rel)
+                raise
+            finally:
+                try:
+                    ftp.quit()
+                except Exception:
+                    pass
+
+        return await asyncio.to_thread(_do_read)
+
+    async def write_file(self, root: str, rel: str, data: bytes):
+        path = _join_remote(root, rel)
+
+        def _ensure_dirs(ftp: FTP, dir_path: str):
+            parts = [p for p in dir_path.strip("/").split("/") if p]
+            cur = "/"
+            for p in parts:
+                cur = _join_remote(cur, p)
+                try:
+                    ftp.mkd(cur)
+                except Exception:
+                    pass
+
+        def _do_write():
+            ftp = self._connect()
+            try:
+                parent = "/" if "/" not in path.strip("/") else path.rsplit("/", 1)[0]
+                _ensure_dirs(ftp, parent)
+                from io import BytesIO
+                bio = BytesIO(data)
+                ftp.storbinary("STOR " + path, bio)
+            finally:
+                try:
+                    ftp.quit()
+                except Exception:
+                    pass
+
+        await asyncio.to_thread(_do_write)
+
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]):
+        # KISS: 聚合后一次性写入
+        buf = bytearray()
+        async for chunk in data_iter:
+            if chunk:
+                buf.extend(chunk)
+        await self.write_file(root, rel, bytes(buf))
+        return len(buf)
+
+    async def mkdir(self, root: str, rel: str):
+        path = _join_remote(root, rel)
+
+        def _do_mkdir():
+            ftp = self._connect()
+            try:
+                parts = [p for p in path.strip("/").split("/") if p]
+                cur = "/"
+                for p in parts:
+                    cur = _join_remote(cur, p)
+                    try:
+                        ftp.mkd(cur)
+                    except Exception:
+                        pass
+            finally:
+                try:
+                    ftp.quit()
+                except Exception:
+                    pass
+
+        await asyncio.to_thread(_do_mkdir)
+
+    async def delete(self, root: str, rel: str):
+        path = _join_remote(root, rel)
+
+        def _do_delete():
+            ftp = self._connect()
+            try:
+                # Try file delete
+                try:
+                    ftp.delete(path)
+                    return
+                except Exception:
+                    pass
+
+                # Recursively delete dir
+                def _rm_tree(dir_path: str):
+                    try:
+                        ftp.cwd(dir_path)
+                    except Exception:
+                        return
+                    items = []
+                    try:
+                        for name, facts in ftp.mlsd():
+                            if name in (".", ".."):
+                                continue
+                            items.append((name, facts.get("type") == "dir"))
+                    except Exception:
+                        try:
+                            names = ftp.nlst()
+                        except Exception:
+                            names = []
+                        for n in names:
+                            if n in (".", ".."):
+                                continue
+                            # Best-effort dir check
+                            try:
+                                ftp.cwd(_join_remote(dir_path, n))
+                                ftp.cwd(dir_path)
+                                items.append((n, True))
+                            except Exception:
+                                items.append((n, False))
+                    for n, is_dir in items:
+                        child = _join_remote(dir_path, n)
+                        if is_dir:
+                            _rm_tree(child)
+                        else:
+                            try:
+                                ftp.delete(child)
+                            except Exception:
+                                pass
+                    try:
+                        ftp.rmd(dir_path)
+                    except Exception:
+                        pass
+
+                _rm_tree(path)
+            finally:
+                try:
+                    ftp.quit()
+                except Exception:
+                    pass
+
+        await asyncio.to_thread(_do_delete)
+
+    async def move(self, root: str, src_rel: str, dst_rel: str):
+        src = _join_remote(root, src_rel)
+        dst = _join_remote(root, dst_rel)
+
+        def _do_move():
+            ftp = self._connect()
+            try:
+                # Ensure dst parent exists
+                parent = "/" if "/" not in dst.strip("/") else dst.rsplit("/", 1)[0]
+                parts = [p for p in parent.strip("/").split("/") if p]
+                cur = "/"
+                for p in parts:
+                    cur = _join_remote(cur, p)
+                    try:
+                        ftp.mkd(cur)
+                    except Exception:
+                        pass
+                ftp.rename(src, dst)
+            finally:
+                try:
+                    ftp.quit()
+                except Exception:
+                    pass
+
+        await asyncio.to_thread(_do_move)
+
+    async def rename(self, root: str, src_rel: str, dst_rel: str):
+        await self.move(root, src_rel, dst_rel)
+
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False):
+        src = _join_remote(root, src_rel)
+        dst = _join_remote(root, dst_rel)
+
+        # naive implementation: download then upload; recursively for dirs
+        async def _is_dir(path: str) -> bool:
+            def _probe() -> bool:
+                ftp = self._connect()
+                try:
+                    try:
+                        ftp.cwd(path)
+                        return True
+                    except Exception:
+                        return False
+                finally:
+                    try:
+                        ftp.quit()
+                    except Exception:
+                        pass
+            return await asyncio.to_thread(_probe)
+
+        if await _is_dir(src):
+            # list children, create dst dir, copy recursively
+            await self.mkdir(root, dst_rel)
+
+            children, _ = await self.list_dir(root, src_rel, page_num=1, page_size=10_000)
+            for ent in children:
+                child_src = f"{src_rel.rstrip('/')}/{ent['name']}"
+                child_dst = f"{dst_rel.rstrip('/')}/{ent['name']}"
+                await self.copy(root, child_src, child_dst, overwrite)
+            return
+
+        # file
+        data = await self.read_file(root, src_rel)
+        if not overwrite:
+            # best-effort existence check
+            try:
+                await self.stat_file(root, dst_rel)
+                raise FileExistsError(dst_rel)
+            except FileNotFoundError:
+                pass
+        await self.write_file(root, dst_rel, data)
+
+    async def stat_file(self, root: str, rel: str):
+        path = _join_remote(root, rel)
+
+        def _do_stat():
+            ftp = self._connect()
+            try:
+                # Try MLST
+                try:
+                    resp: List[str] = []
+                    ftp.retrlines("MLST " + path, resp.append)
+                    # The last line usually contains facts
+                    facts = {}
+                    if resp:
+                        facts = _parse_mlst_line(resp[-1])
+                    name = rel.split("/")[-1]
+                    t = facts.get("type") or "file"
+                    is_dir = t == "dir"
+                    size = int(facts.get("size") or 0)
+                    mtime = _parse_modify_to_epoch(facts.get("modify") or "")
+                    return {
+                        "name": name,
+                        "is_dir": is_dir,
+                        "size": 0 if is_dir else size,
+                        "mtime": mtime,
+                        "type": "dir" if is_dir else "file",
+                        "path": path,
+                    }
+                except Exception:
+                    pass
+
+                # Probe directory
+                try:
+                    ftp.cwd(path)
+                    return {
+                        "name": rel.split("/")[-1],
+                        "is_dir": True,
+                        "size": 0,
+                        "mtime": 0,
+                        "type": "dir",
+                        "path": path,
+                    }
+                except Exception:
+                    pass
+
+                # Treat as file
+                try:
+                    size = ftp.size(path) or 0
+                except Exception:
+                    size = 0
+                try:
+                    mdtm = ftp.sendcmd("MDTM " + path)
+                    mtime = _parse_modify_to_epoch(mdtm.split(" ", 1)[1]) if mdtm.startswith("213 ") else 0
+                except Exception:
+                    mtime = 0
+                return {
+                    "name": rel.split("/")[-1],
+                    "is_dir": False,
+                    "size": int(size or 0),
+                    "mtime": int(mtime or 0),
+                    "type": "file",
+                    "path": path,
+                }
+            except error_perm as e:
+                if str(e).startswith("550"):
+                    raise FileNotFoundError(rel)
+                raise
+            finally:
+                try:
+                    ftp.quit()
+                except Exception:
+                    pass
+
+        return await asyncio.to_thread(_do_stat)
+
+    async def stream_file(self, root: str, rel: str, range_header: str | None):
+        path = _join_remote(root, rel)
+        # Get size (best-effort)
+        def _get_size() -> Optional[int]:
+            ftp = self._connect()
+            try:
+                try:
+                    return int(ftp.size(path) or 0)
+                except Exception:
+                    return None
+            finally:
+                try:
+                    ftp.quit()
+                except Exception:
+                    pass
+
+        total_size = await asyncio.to_thread(_get_size)
+        mime, _ = mimetypes.guess_type(rel)
+        content_type = mime or "application/octet-stream"
+
+        rng: Optional[_Range] = None
+        status = 200
+        headers = {"Accept-Ranges": "bytes", "Content-Type": content_type}
+        if range_header and range_header.startswith("bytes=") and total_size is not None:
+            try:
+                s, e = (range_header.removeprefix("bytes=").split("-", 1))
+                start = int(s) if s.strip() else 0
+                end = int(e) if e.strip() else (total_size - 1)
+                if start >= total_size:
+                    raise HTTPException(416, detail="Requested Range Not Satisfiable")
+                if end >= total_size:
+                    end = total_size - 1
+                rng = _Range(start, end)
+                status = 206
+                headers["Content-Range"] = f"bytes {start}-{end}/{total_size}"
+                headers["Content-Length"] = str(end - start + 1)
+            except ValueError:
+                raise HTTPException(400, detail="Invalid Range header")
+        elif total_size is not None:
+            headers["Content-Length"] = str(total_size)
+
+        queue: asyncio.Queue[Optional[bytes]] = asyncio.Queue(maxsize=8)
+
+        class _Stop(Exception):
+            pass
+
+        def _worker():
+            ftp = self._connect()
+            remaining = None
+            if rng is not None:
+                remaining = (rng.end - rng.start + 1) if rng.end is not None else None
+
+            def _cb(chunk: bytes):
+                nonlocal remaining
+                if not chunk:
+                    return
+                try:
+                    if remaining is not None:
+                        if len(chunk) > remaining:
+                            part = chunk[:remaining]
+                            queue.put_nowait(part)
+                            remaining = 0
+                            raise _Stop()
+                        else:
+                            queue.put_nowait(chunk)
+                            remaining -= len(chunk)
+                            if remaining <= 0:
+                                raise _Stop()
+                    else:
+                        queue.put_nowait(chunk)
+                except _Stop:
+                    raise
+                except Exception:
+                    # queue full or event loop closed
+                    raise _Stop()
+
+            try:
+                if rng is not None:
+                    ftp.retrbinary("RETR " + path, _cb, rest=rng.start)
+                else:
+                    ftp.retrbinary("RETR " + path, _cb)
+                queue.put_nowait(None)
+            except _Stop:
+                try:
+                    queue.put_nowait(None)
+                except Exception:
+                    pass
+            except error_perm as e:
+                try:
+                    queue.put_nowait(None)
+                except Exception:
+                    pass
+                if str(e).startswith("550"):
+                    pass
+            finally:
+                try:
+                    ftp.quit()
+                except Exception:
+                    pass
+
+        async def agen():
+            worker_fut = asyncio.to_thread(_worker)
+            try:
+                while True:
+                    chunk = await queue.get()
+                    if chunk is None:
+                        break
+                    yield chunk
+            finally:
+                try:
+                    await worker_fut
+                except Exception:
+                    pass
+
+        return StreamingResponse(agen(), status_code=status, headers=headers, media_type=content_type)
+
+
+ADAPTER_TYPE = "ftp"
+
+CONFIG_SCHEMA = [
+    {"key": "host", "label": "主机", "type": "string", "required": True, "placeholder": "ftp.example.com"},
+    {"key": "port", "label": "端口", "type": "number", "required": False, "default": 21},
+    {"key": "username", "label": "用户名", "type": "string", "required": False},
+    {"key": "password", "label": "密码", "type": "password", "required": False},
+    {"key": "passive", "label": "被动模式", "type": "boolean", "required": False, "default": True},
+    {"key": "timeout", "label": "超时(秒)", "type": "number", "required": False, "default": 15},
+    {"key": "root", "label": "根路径", "type": "string", "required": False, "default": "/"},
+]
+
+
+def ADAPTER_FACTORY(rec: StorageAdapter):
+    return FTPAdapter(rec)

domain/adapters/providers/googledrive.py

@@ -0,0 +1,560 @@
+from __future__ import annotations
+from datetime import datetime, timezone, timedelta
+from typing import List, Dict, Tuple, AsyncIterator
+import httpx
+from fastapi.responses import StreamingResponse, Response
+from fastapi import HTTPException
+from models import StorageAdapter
+
+GOOGLE_OAUTH_URL = "https://oauth2.googleapis.com/token"
+GOOGLE_DRIVE_API_URL = "https://www.googleapis.com/drive/v3"
+
+
+class GoogleDriveAdapter:
+    """Google Drive 存储适配器"""
+
+    def __init__(self, record: StorageAdapter):
+        self.record = record
+        cfg = record.config
+        self.client_id = cfg.get("client_id")
+        self.client_secret = cfg.get("client_secret")
+        self.refresh_token = cfg.get("refresh_token")
+        self.root_folder_id = cfg.get("root_folder_id", "root")
+        self.enable_redirect_307 = bool(cfg.get("enable_direct_download_307"))
+
+        if not all([self.client_id, self.client_secret, self.refresh_token]):
+            raise ValueError(
+                "Google Drive 适配器需要 client_id, client_secret, 和 refresh_token")
+
+        self._access_token: str | None = None
+        self._token_expiry: datetime | None = None
+
+    def get_effective_root(self, sub_path: str | None) -> str:
+        """
+        获取有效根路径。
+        :param sub_path: 子路径。
+        :return: 完整的有效路径。
+        """
+        if sub_path:
+            return f"{sub_path.strip('/')}".strip()
+        return ""
+
+    async def _get_access_token(self) -> str:
+        """
+        获取或刷新 access token。
+        :return: access token。
+        """
+        if self._access_token and self._token_expiry and datetime.now(timezone.utc) < self._token_expiry:
+            return self._access_token
+
+        data = {
+            "client_id": self.client_id,
+            "client_secret": self.client_secret,
+            "refresh_token": self.refresh_token,
+            "grant_type": "refresh_token",
+        }
+        async with httpx.AsyncClient(timeout=20.0) as client:
+            resp = await client.post(GOOGLE_OAUTH_URL, data=data)
+            resp.raise_for_status()
+            token_data = resp.json()
+            self._access_token = token_data["access_token"]
+            self._token_expiry = datetime.now(
+                timezone.utc) + timedelta(seconds=token_data["expires_in"] - 300)
+            return self._access_token
+
+    async def _request(self, method: str, endpoint: str, **kwargs):
+        """
+        向 Google Drive API 发送请求。
+        :param method: HTTP 方法。
+        :param endpoint: API 端点。
+        :param kwargs: 其他请求参数。
+        :return: 响应对象。
+        """
+        token = await self._get_access_token()
+        headers = {"Authorization": f"Bearer {token}"}
+        if "headers" in kwargs:
+            headers.update(kwargs.pop("headers"))
+
+        url = f"{GOOGLE_DRIVE_API_URL}{endpoint}"
+        async with httpx.AsyncClient(timeout=60.0) as client:
+            resp = await client.request(method, url, headers=headers, **kwargs)
+            if resp.status_code == 401:
+                self._access_token = None
+                token = await self._get_access_token()
+                headers["Authorization"] = f"Bearer {token}"
+                resp = await client.request(method, url, headers=headers, **kwargs)
+            return resp
+
+    async def _get_folder_id_by_path(self, path: str) -> str:
+        """
+        通过路径获取文件夹 ID。
+        :param path: 路径。
+        :return: 文件夹 ID。
+        """
+        if not path or path == "/":
+            return self.root_folder_id
+
+        parts = [p for p in path.strip("/").split("/") if p]
+        current_id = self.root_folder_id
+
+        for part in parts:
+            query = f"name='{part}' and '{current_id}' in parents and mimeType='application/vnd.google-apps.folder' and trashed=false"
+            params = {"q": query, "fields": "files(id, name)"}
+            resp = await self._request("GET", "/files", params=params)
+            resp.raise_for_status()
+            data = resp.json()
+            files = data.get("files", [])
+            if not files:
+                raise FileNotFoundError(f"文件夹不存在: {part}")
+            current_id = files[0]["id"]
+
+        return current_id
+
+    async def _get_file_id_by_path(self, path: str) -> str | None:
+        """
+        通过路径获取文件 ID。
+        :param path: 文件路径。
+        :return: 文件 ID 或 None。
+        """
+        if not path or path == "/":
+            return self.root_folder_id
+
+        parts = [p for p in path.strip("/").split("/") if p]
+        parent_id = self.root_folder_id
+
+        for i, part in enumerate(parts):
+            is_last = i == len(parts) - 1
+            mime_filter = "" if is_last else "and mimeType='application/vnd.google-apps.folder'"
+            query = f"name='{part}' and '{parent_id}' in parents {mime_filter} and trashed=false"
+            params = {"q": query, "fields": "files(id, name)"}
+            resp = await self._request("GET", "/files", params=params)
+            resp.raise_for_status()
+            data = resp.json()
+            files = data.get("files", [])
+            if not files:
+                return None
+            parent_id = files[0]["id"]
+
+        return parent_id
+
+    def _format_item(self, item: Dict) -> Dict:
+        """
+        将 Google Drive API 返回的 item 格式化为统一的格式。
+        :param item: Google Drive API 返回的 item 字典。
+        :return: 格式化后的字典。
+        """
+        is_dir = item["mimeType"] == "application/vnd.google-apps.folder"
+        mtime_str = item.get("modifiedTime", item.get("createdTime", ""))
+        try:
+            mtime = int(datetime.fromisoformat(mtime_str.replace("Z", "+00:00")).timestamp())
+        except:
+            mtime = 0
+
+        return {
+            "name": item["name"],
+            "is_dir": is_dir,
+            "size": 0 if is_dir else int(item.get("size", 0)),
+            "mtime": mtime,
+            "type": "dir" if is_dir else "file",
+        }
+
+    async def list_dir(self, root: str, rel: str, page_num: int = 1, page_size: int = 50, sort_by: str = "name", sort_order: str = "asc") -> Tuple[List[Dict], int]:
+        """
+        列出目录内容。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :param page_num: 页码。
+        :param page_size: 每页大小。
+        :param sort_by: 排序字段
+        :param sort_order: 排序顺序
+        :return: 文件/目录列表和总数。
+        """
+        try:
+            folder_id = await self._get_folder_id_by_path(rel)
+        except FileNotFoundError:
+            return [], 0
+
+        query = f"'{folder_id}' in parents and trashed=false"
+        params = {
+            "q": query,
+            "fields": "files(id, name, mimeType, size, modifiedTime, createdTime)",
+            "pageSize": 1000,
+        }
+
+        all_items = []
+        page_token = None
+
+        while True:
+            if page_token:
+                params["pageToken"] = page_token
+
+            resp = await self._request("GET", "/files", params=params)
+            if resp.status_code == 404:
+                return [], 0
+            resp.raise_for_status()
+
+            data = resp.json()
+            all_items.extend(data.get("files", []))
+            page_token = data.get("nextPageToken")
+
+            if not page_token:
+                break
+
+        formatted_items = [self._format_item(item) for item in all_items]
+
+        # 排序
+        reverse = sort_order.lower() == "desc"
+        def get_sort_key(item):
+            key = (not item["is_dir"],)
+            sort_field = sort_by.lower()
+            if sort_field == "name":
+                key += (item["name"].lower(),)
+            elif sort_field == "size":
+                key += (item["size"],)
+            elif sort_field == "mtime":
+                key += (item["mtime"],)
+            else:
+                key += (item["name"].lower(),)
+            return key
+        formatted_items.sort(key=get_sort_key, reverse=reverse)
+
+        total_count = len(formatted_items)
+        start_idx = (page_num - 1) * page_size
+        end_idx = start_idx + page_size
+
+        return formatted_items[start_idx:end_idx], total_count
+
+    async def read_file(self, root: str, rel: str) -> bytes:
+        """
+        读取文件内容。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :return: 文件内容的字节流。
+        """
+        file_id = await self._get_file_id_by_path(rel)
+        if not file_id:
+            raise FileNotFoundError(rel)
+
+        resp = await self._request("GET", f"/files/{file_id}", params={"alt": "media"})
+        if resp.status_code == 404:
+            raise FileNotFoundError(rel)
+        resp.raise_for_status()
+        return resp.content
+
+    async def write_file(self, root: str, rel: str, data: bytes):
+        """
+        写入文件。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :param data: 文件内容的字节流。
+        """
+        parent_path = "/".join(rel.strip("/").split("/")[:-1])
+        file_name = rel.strip("/").split("/")[-1]
+        parent_id = await self._get_folder_id_by_path(parent_path)
+
+        # 检查文件是否已存在
+        existing_id = await self._get_file_id_by_path(rel)
+
+        if existing_id:
+            # 更新现有文件
+            async with httpx.AsyncClient(timeout=60.0) as client:
+                token = await self._get_access_token()
+                headers = {"Authorization": f"Bearer {token}"}
+                url = f"https://www.googleapis.com/upload/drive/v3/files/{existing_id}?uploadType=media"
+                resp = await client.patch(url, headers=headers, content=data)
+                resp.raise_for_status()
+        else:
+            # 创建新文件
+            metadata = {
+                "name": file_name,
+                "parents": [parent_id]
+            }
+
+            async with httpx.AsyncClient(timeout=60.0) as client:
+                token = await self._get_access_token()
+                headers = {"Authorization": f"Bearer {token}"}
+                
+                # 使用 multipart 上传
+                import json
+                boundary = "===============boundary==============="
+                headers["Content-Type"] = f"multipart/related; boundary={boundary}"
+                
+                body = (
+                    f"--{boundary}\r\n"
+                    f"Content-Type: application/json; charset=UTF-8\r\n\r\n"
+                    f"{json.dumps(metadata)}\r\n"
+                    f"--{boundary}\r\n"
+                    f"Content-Type: application/octet-stream\r\n\r\n"
+                ).encode() + data + f"\r\n--{boundary}--".encode()
+                
+                url = "https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart"
+                resp = await client.post(url, headers=headers, content=body)
+                resp.raise_for_status()
+
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]):
+        """
+        以流式方式写入文件。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :param data_iter: 文件内容的异步迭代器。
+        :return: 文件大小。
+        """
+        # 先收集所有数据
+        chunks = []
+        total_size = 0
+        async for chunk in data_iter:
+            chunks.append(chunk)
+            total_size += len(chunk)
+        
+        data = b"".join(chunks)
+        await self.write_file(root, rel, data)
+        return total_size
+
+    async def mkdir(self, root: str, rel: str):
+        """
+        创建目录。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        """
+        parent_path = "/".join(rel.strip("/").split("/")[:-1])
+        folder_name = rel.strip("/").split("/")[-1]
+        parent_id = await self._get_folder_id_by_path(parent_path)
+
+        metadata = {
+            "name": folder_name,
+            "mimeType": "application/vnd.google-apps.folder",
+            "parents": [parent_id]
+        }
+
+        resp = await self._request("POST", "/files", json=metadata)
+        resp.raise_for_status()
+
+    async def delete(self, root: str, rel: str):
+        """
+        删除文件或目录。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        """
+        file_id = await self._get_file_id_by_path(rel)
+        if not file_id:
+            return
+
+        resp = await self._request("DELETE", f"/files/{file_id}")
+        if resp.status_code not in (204, 404):
+            resp.raise_for_status()
+
+    async def move(self, root: str, src_rel: str, dst_rel: str):
+        """
+        移动或重命名文件/目录。
+        :param root: 根路径。
+        :param src_rel: 源相对路径。
+        :param dst_rel: 目标相对路径。
+        """
+        file_id = await self._get_file_id_by_path(src_rel)
+        if not file_id:
+            raise FileNotFoundError(src_rel)
+
+        # 获取当前父文件夹
+        resp = await self._request("GET", f"/files/{file_id}", params={"fields": "parents"})
+        resp.raise_for_status()
+        current_parents = resp.json().get("parents", [])
+
+        # 获取目标父文件夹和新名称
+        dst_parent_path = "/".join(dst_rel.strip("/").split("/")[:-1])
+        dst_name = dst_rel.strip("/").split("/")[-1]
+        dst_parent_id = await self._get_folder_id_by_path(dst_parent_path)
+
+        # 更新文件
+        params = {
+            "addParents": dst_parent_id,
+            "removeParents": ",".join(current_parents) if current_parents else None,
+        }
+        metadata = {"name": dst_name}
+
+        resp = await self._request("PATCH", f"/files/{file_id}", params=params, json=metadata)
+        resp.raise_for_status()
+
+    async def rename(self, root: str, src_rel: str, dst_rel: str):
+        """
+        重命名文件或目录。
+        """
+        await self.move(root, src_rel, dst_rel)
+
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False):
+        """
+        复制文件或目录。
+        :param root: 根路径。
+        :param src_rel: 源相对路径。
+        :param dst_rel: 目标相对路径。
+        :param overwrite: 是否覆盖。
+        """
+        file_id = await self._get_file_id_by_path(src_rel)
+        if not file_id:
+            raise FileNotFoundError(src_rel)
+
+        dst_parent_path = "/".join(dst_rel.strip("/").split("/")[:-1])
+        dst_name = dst_rel.strip("/").split("/")[-1]
+        dst_parent_id = await self._get_folder_id_by_path(dst_parent_path)
+
+        metadata = {
+            "name": dst_name,
+            "parents": [dst_parent_id]
+        }
+
+        resp = await self._request("POST", f"/files/{file_id}/copy", json=metadata)
+        resp.raise_for_status()
+
+    async def stream_file(self, root: str, rel: str, range_header: str | None):
+        """
+        流式传输文件（支持范围请求）。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :param range_header: HTTP Range 头。
+        :return: FastAPI StreamingResponse 对象。
+        """
+        file_id = await self._get_file_id_by_path(rel)
+        if not file_id:
+            raise FileNotFoundError(rel)
+
+        # 获取文件元数据
+        resp = await self._request("GET", f"/files/{file_id}", params={"fields": "name, size, mimeType"})
+        if resp.status_code == 404:
+            raise FileNotFoundError(rel)
+        resp.raise_for_status()
+        item_data = resp.json()
+
+        file_size = int(item_data.get("size", 0))
+        content_type = item_data.get("mimeType", "application/octet-stream")
+
+        start = 0
+        end = file_size - 1
+        status = 200
+        headers = {
+            "Accept-Ranges": "bytes",
+            "Content-Type": content_type,
+            "Content-Disposition": f"inline; filename=\"{item_data.get('name')}\""
+        }
+
+        if range_header and range_header.startswith("bytes="):
+            try:
+                part = range_header.removeprefix("bytes=")
+                s, e = part.split("-", 1)
+                if s.strip():
+                    start = int(s)
+                if e.strip():
+                    end = int(e)
+                if start >= file_size:
+                    raise HTTPException(416, "Requested Range Not Satisfiable")
+                if end >= file_size:
+                    end = file_size - 1
+                status = 206
+            except ValueError:
+                raise HTTPException(400, "Invalid Range header")
+
+            headers["Content-Range"] = f"bytes {start}-{end}/{file_size}"
+            headers["Content-Length"] = str(end - start + 1)
+        else:
+            headers["Content-Length"] = str(file_size)
+
+        async def file_iterator():
+            nonlocal start, end
+            token = await self._get_access_token()
+            async with httpx.AsyncClient(timeout=60.0) as client:
+                req_headers = {
+                    'Authorization': f'Bearer {token}',
+                    'Range': f'bytes={start}-{end}'
+                }
+                url = f"{GOOGLE_DRIVE_API_URL}/files/{file_id}?alt=media"
+                async with client.stream("GET", url, headers=req_headers) as stream_resp:
+                    stream_resp.raise_for_status()
+                    async for chunk in stream_resp.aiter_bytes():
+                        yield chunk
+
+        return StreamingResponse(file_iterator(), status_code=status, headers=headers, media_type=content_type)
+
+    async def stat_file(self, root: str, rel: str):
+        """
+        获取文件或目录的元数据。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :return: 格式化后的文件/目录信息。
+        """
+        file_id = await self._get_file_id_by_path(rel)
+        if not file_id:
+            raise FileNotFoundError(rel)
+
+        resp = await self._request("GET", f"/files/{file_id}", params={"fields": "id, name, mimeType, size, modifiedTime, createdTime"})
+        if resp.status_code == 404:
+            raise FileNotFoundError(rel)
+        resp.raise_for_status()
+        return self._format_item(resp.json())
+
+    async def get_direct_download_response(self, root: str, rel: str):
+        """
+        获取直接下载响应 (307 重定向)。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :return: 307 重定向响应或 None。
+        """
+        if not self.enable_redirect_307:
+            return None
+
+        file_id = await self._get_file_id_by_path(rel)
+        if not file_id:
+            raise FileNotFoundError(rel)
+
+        # 获取文件的下载链接
+        resp = await self._request("GET", f"/files/{file_id}", params={"fields": "webContentLink"})
+        if resp.status_code == 404:
+            raise FileNotFoundError(rel)
+        resp.raise_for_status()
+
+        item_data = resp.json()
+        download_url = item_data.get("webContentLink")
+        if not download_url:
+            return None
+
+        return Response(status_code=307, headers={"Location": download_url})
+
+    async def get_thumbnail(self, root: str, rel: str, size: str = "medium"):
+        """
+        获取文件的缩略图。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :param size: 缩略图大小 (暂未使用，Google Drive 自动决定)。
+        :return: 缩略图内容的字节流，或在不支持时返回 None。
+        """
+        file_id = await self._get_file_id_by_path(rel)
+        if not file_id:
+            return None
+
+        try:
+            resp = await self._request("GET", f"/files/{file_id}", params={"fields": "thumbnailLink"})
+            if resp.status_code == 200:
+                item_data = resp.json()
+                thumbnail_link = item_data.get("thumbnailLink")
+                if thumbnail_link:
+                    async with httpx.AsyncClient(timeout=30.0) as client:
+                        thumb_resp = await client.get(thumbnail_link)
+                        thumb_resp.raise_for_status()
+                        return thumb_resp.content
+            return None
+        except Exception:
+            return None
+
+
+ADAPTER_TYPE = "googledrive"
+
+CONFIG_SCHEMA = [
+    {"key": "client_id", "label": "Client ID", "type": "string", "required": True},
+    {"key": "client_secret", "label": "Client Secret",
+        "type": "password", "required": True},
+    {"key": "refresh_token", "label": "Refresh Token", "type": "password",
+        "required": True, "help_text": "可以通过 Google OAuth 2.0 Playground 获取"},
+    {"key": "root_folder_id", "label": "根文件夹 ID (Root Folder ID)", "type": "string",
+     "required": False, "placeholder": "默认为根目录 (root)", "default": "root"},
+    {"key": "enable_direct_download_307", "label": "Enable 307 redirect download", "type": "boolean", "default": False},
+]
+
+
+def ADAPTER_FACTORY(rec): return GoogleDriveAdapter(rec)

domain/adapters/providers/local.py

@@ -0,0 +1,312 @@
+from __future__ import annotations
+import os
+import shutil
+import stat
+import time
+from pathlib import Path
+from typing import List, Dict, Tuple, AsyncIterator
+import asyncio
+import mimetypes
+from fastapi import HTTPException
+from fastapi.responses import StreamingResponse, Response
+from models import StorageAdapter
+
+
+def _safe_join(root: str, rel: str) -> Path:
+    root_path = Path(root).resolve()
+    full = (root_path / rel).resolve()
+    if not str(full).startswith(str(root_path)):
+        raise ValueError("Path escape detected")
+    return full
+
+
+DEFAULT_FILE_MODE = 0o666
+DEFAULT_DIR_MODE = 0o777
+
+
+def _apply_mode(path: Path, mode: int):
+    try:
+        os.chmod(path, mode)
+    except Exception:
+        pass
+
+
+class LocalAdapter:
+    def __init__(self, record: StorageAdapter):
+        self.record = record
+        self.root = self.record.config.get("root")
+        if not self.root:
+            raise ValueError("Local adapter config requires 'root'")
+        Path(self.root).mkdir(parents=True, exist_ok=True)
+
+    def get_effective_root(self, sub_path: str | None) -> str:
+        root = self.record.config.get("root")
+        if sub_path:
+            return str(Path(root) / sub_path)
+        return root
+
+    async def list_dir(self, root: str, rel: str, page_num: int = 1, page_size: int = 50, sort_by: str = "name", sort_order: str = "asc") -> Tuple[List[Dict], int]:
+        rel = rel.strip('/')
+        base = _safe_join(root, rel) if rel else Path(root)
+        if not base.exists():
+            return [], 0
+        if not base.is_dir():
+            raise NotADirectoryError(rel)
+
+        all_names = await asyncio.to_thread(os.listdir, base)
+        
+        entries = []
+        for name in all_names:
+            fp = base / name
+            try:
+                st = await asyncio.to_thread(fp.stat)
+            except FileNotFoundError:
+                continue
+            is_dir = fp.is_dir()
+            entries.append({
+                "name": name,
+                "is_dir": is_dir,
+                "size": 0 if is_dir else st.st_size,
+                "mtime": int(st.st_mtime),
+                "mode": stat.S_IMODE(st.st_mode),
+                "type": "dir" if is_dir else "file",
+            })
+
+        # 排序
+        reverse = sort_order.lower() == "desc"
+        
+        def get_sort_key(item):
+            # 基础排序键，目录优先
+            key = (not item["is_dir"],)
+            sort_field = sort_by.lower()
+            
+            if sort_field == "name":
+                key += (item["name"].lower(),)
+            elif sort_field == "size":
+                key += (item["size"],)
+            elif sort_field == "mtime":
+                key += (item["mtime"],)
+            else: # 默认按名称
+                key += (item["name"].lower(),)
+            return key
+
+        entries.sort(key=get_sort_key, reverse=reverse)
+        
+        total_count = len(entries)
+        
+        # 分页
+        start_idx = (page_num - 1) * page_size
+        end_idx = start_idx + page_size
+        page_entries = entries[start_idx:end_idx]
+        
+        return page_entries, total_count
+
+    async def read_file(self, root: str, rel: str) -> bytes:
+        fp = _safe_join(root, rel)
+        if not fp.exists() or not fp.is_file():
+            raise FileNotFoundError(rel)
+        return await asyncio.to_thread(fp.read_bytes)
+
+    async def write_file(self, root: str, rel: str, data: bytes):
+        fp = _safe_join(root, rel)
+        pre_exists = fp.exists() 
+        await asyncio.to_thread(os.makedirs, fp.parent, mode=DEFAULT_DIR_MODE, exist_ok=True)
+        await asyncio.to_thread(fp.write_bytes, data)
+        if not pre_exists:
+            await asyncio.to_thread(_apply_mode, fp, DEFAULT_FILE_MODE)
+
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]):
+        fp = _safe_join(root, rel)
+        pre_exists = fp.exists()
+        await asyncio.to_thread(os.makedirs, fp.parent, mode=DEFAULT_DIR_MODE, exist_ok=True)
+        # 流式写入，避免一次性读入内存
+        def _open():
+            return open(fp, "wb")
+        f = await asyncio.to_thread(_open)
+        size = 0
+        try:
+            async for chunk in data_iter:
+                if not chunk:
+                    continue
+                size += len(chunk)
+                await asyncio.to_thread(f.write, chunk)
+        finally:
+            await asyncio.to_thread(f.close)
+        if not pre_exists:
+            await asyncio.to_thread(_apply_mode, fp, DEFAULT_FILE_MODE)
+        return size
+
+    async def mkdir(self, root: str, rel: str):
+        fp = _safe_join(root, rel)
+        await asyncio.to_thread(os.makedirs, fp, mode=DEFAULT_DIR_MODE, exist_ok=True)
+
+    async def delete(self, root: str, rel: str):
+        fp = _safe_join(root, rel)
+        if not fp.exists():
+            return
+        if fp.is_dir():
+            await asyncio.to_thread(shutil.rmtree, fp)
+        else:
+            await asyncio.to_thread(fp.unlink)
+
+    async def stat_path(self, root: str, rel: str):
+        """新增: 返回路径状态调试信息"""
+        fp = _safe_join(root, rel)
+        def _stat():
+            if not fp.exists():
+                return {"exists": False, "is_dir": None, "path": str(fp)}
+            return {
+                "exists": True,
+                "is_dir": fp.is_dir(),
+                "path": str(fp)
+            }
+        return await asyncio.to_thread(_stat)
+
+    async def exists(self, root: str, rel: str) -> bool:
+        """新增: 判断路径是否存在"""
+        fp = _safe_join(root, rel)
+        return await asyncio.to_thread(fp.exists)
+
+    async def move(self, root: str, src_rel: str, dst_rel: str):
+        src = _safe_join(root, src_rel)
+        dst = _safe_join(root, dst_rel)
+        if str(src) == str(dst):
+            return
+        if not src.exists():
+            raise FileNotFoundError(src_rel)
+        await asyncio.to_thread(dst.parent.mkdir, parents=True, exist_ok=True)
+
+        def _do_move():
+            try:
+                os.replace(src, dst) 
+            except OSError:
+                shutil.move(str(src), str(dst))
+        await asyncio.to_thread(_do_move)
+
+    async def rename(self, root: str, src_rel: str, dst_rel: str):
+        src = _safe_join(root, src_rel)
+        dst = _safe_join(root, dst_rel)
+        if str(src) == str(dst):
+            return
+        if not src.exists():
+            raise FileNotFoundError(src_rel)
+        await asyncio.to_thread(dst.parent.mkdir, parents=True, exist_ok=True)
+        def _do_rename():
+            try:
+                os.rename(src, dst)
+            except OSError:
+                os.replace(src, dst)
+        await asyncio.to_thread(_do_rename)
+
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False):
+        src = _safe_join(root, src_rel)
+        dst = _safe_join(root, dst_rel)
+        if not src.exists():
+            raise FileNotFoundError(src_rel)
+        if str(src) == str(dst):
+            return
+        await asyncio.to_thread(dst.parent.mkdir, parents=True, exist_ok=True)
+        def _do():
+            if dst.exists():
+                if not overwrite:
+                    raise FileExistsError(dst_rel)
+                if dst.is_dir():
+                    shutil.rmtree(dst)
+                else:
+                    dst.unlink()
+            if src.is_dir():
+                shutil.copytree(src, dst)
+            else:
+                shutil.copy2(src, dst)
+        await asyncio.to_thread(_do)
+
+    async def stream_file(self, root: str, rel: str, range_header: str | None):
+        fp = _safe_join(root, rel)
+        if not fp.exists() or not fp.is_file():
+            raise HTTPException(404, detail="File not found")
+        mime, _ = mimetypes.guess_type(rel)
+        content_type = mime or "application/octet-stream"
+        file_size = (await asyncio.to_thread(fp.stat)).st_size
+        start = 0
+        end = file_size - 1
+        status = 200
+        headers = {
+            "Accept-Ranges": "bytes",
+            "Content-Type": content_type,
+        }
+        if range_header and range_header.startswith("bytes="):
+            try:
+                part = range_header.removeprefix("bytes=")
+                s, e = part.split("-", 1)
+                if s.strip():
+                    start = int(s)
+                if e.strip():
+                    end = int(e)
+                if start >= file_size:
+                    raise HTTPException(416, detail="Requested Range Not Satisfiable")
+                if end >= file_size:
+                    end = file_size - 1
+                status = 206
+            except ValueError:
+                raise HTTPException(400, detail="Invalid Range header")
+            headers["Content-Range"] = f"bytes {start}-{end}/{file_size}"
+            headers["Content-Length"] = str(end - start + 1)
+        else:
+            headers["Content-Length"] = str(file_size)
+
+        async def iterator():
+            # 使用线程池避免阻塞
+            def _read_segment(offset: int, length: int):
+                with open(fp, "rb") as f:
+                    f.seek(offset)
+                    return f.read(length)
+            chunk_size = 256 * 1024
+            remaining = end - start + 1
+            offset = start
+            while remaining > 0:
+                size = min(chunk_size, remaining)
+                data = await asyncio.to_thread(_read_segment, offset, size)
+                if not data:
+                    break
+                yield data
+                remaining -= len(data)
+                offset += len(data)
+
+        return StreamingResponse(iterator(), status_code=status, headers=headers, media_type=content_type)
+
+    async def stat_file(self, root: str, rel: str):
+        fp = _safe_join(root, rel)
+        if not fp.exists():
+            raise FileNotFoundError(rel)
+        st = await asyncio.to_thread(fp.stat)
+        info = {
+            "name": fp.name,
+            "is_dir": fp.is_dir(),
+            "size": st.st_size,
+            "mtime": int(st.st_mtime),
+            "mode": stat.S_IMODE(st.st_mode),
+            "type": "dir" if fp.is_dir() else "file",
+            "path": str(fp),
+        }
+        # exif信息
+        exif = None
+        if not fp.is_dir():
+            mime, _ = mimetypes.guess_type(fp.name)
+            if mime and mime.startswith("image/"):
+                try:
+                    from PIL import Image
+                    img = await asyncio.to_thread(Image.open, fp)
+                    exif_data = img._getexif()
+                    if exif_data:
+                        exif = {str(k): str(v) for k, v in exif_data.items()}
+                except Exception:
+                    exif = None
+        info["exif"] = exif
+        return info
+
+
+ADAPTER_TYPE = "local"
+CONFIG_SCHEMA = [
+    {"key": "root", "label": "根目录", "type": "string", "required": True, "placeholder": "/data/storage"},
+]
+ADAPTER_FACTORY = lambda rec: LocalAdapter(rec)

domain/adapters/providers/onedrive.py

@@ -0,0 +1,462 @@
+from __future__ import annotations
+from datetime import datetime, timezone, timedelta
+from typing import List, Dict, Tuple, AsyncIterator
+import httpx
+from fastapi.responses import StreamingResponse, Response
+from fastapi import HTTPException
+from models import StorageAdapter
+
+MS_GRAPH_URL = "https://graph.microsoft.com/v1.0"
+MS_OAUTH_URL = "https://login.microsoftonline.com/common/oauth2/v2.0/token"
+
+
+class OneDriveAdapter:
+    """OneDrive 存储适配器"""
+
+    def __init__(self, record: StorageAdapter):
+        self.record = record
+        cfg = record.config
+        self.client_id = cfg.get("client_id")
+        self.client_secret = cfg.get("client_secret")
+        self.refresh_token = cfg.get("refresh_token")
+        self.root = cfg.get("root", "/").strip("/")
+        self.enable_redirect_307 = bool(cfg.get("enable_direct_download_307"))
+
+        if not all([self.client_id, self.client_secret, self.refresh_token]):
+            raise ValueError(
+                "OneDrive 适配器需要 client_id, client_secret, 和 refresh_token")
+
+        self._access_token: str | None = None
+        self._token_expiry: datetime | None = None
+
+    def get_effective_root(self, sub_path: str | None) -> str:
+        """
+        获取有效根路径。
+        :param sub_path: 子路径。
+        :return: 完整的有效路径。
+        """
+        if sub_path:
+            return f"/{self.root.strip('/')}/{sub_path.strip('/')}".strip()
+        return f"/{self.root.strip('/')}".strip()
+
+    def _get_api_path(self, rel_path: str) -> str:
+        """
+        将用户可见的相对路径转换为 Graph API 路径段。
+        :param rel_path: 相对路径。
+        :return: Graph API 路径段。
+        """
+        full_path = self.get_effective_root(rel_path).strip('/')
+        if not full_path:
+            return ""
+        return f":/{full_path}"
+
+    async def _get_access_token(self) -> str:
+        """
+        获取或刷新 access token。
+        :return: access token。
+        """
+        if self._access_token and self._token_expiry and datetime.now(timezone.utc) < self._token_expiry:
+            return self._access_token
+
+        data = {
+            "client_id": self.client_id,
+            "client_secret": self.client_secret,
+            "refresh_token": self.refresh_token,
+            "grant_type": "refresh_token",
+        }
+        async with httpx.AsyncClient(timeout=20.0) as client:
+            resp = await client.post(MS_OAUTH_URL, data=data)
+            resp.raise_for_status()
+            token_data = resp.json()
+            self._access_token = token_data["access_token"]
+            self._token_expiry = datetime.now(
+                timezone.utc) + timedelta(seconds=token_data["expires_in"] - 300)
+            return self._access_token
+
+    async def _request(self, method: str, api_path_segment: str | None = None, *, full_url: str | None = None, **kwargs):
+        """
+        向 Microsoft Graph API 发送请求。
+        :param method: HTTP 方法。
+        :param api_path_segment: API 路径段 (与 full_url 互斥)。
+        :param full_url: 完整的请求 URL (与 api_path_segment 互斥)。
+        :param kwargs: 其他请求参数。
+        :return: 响应对象。
+        """
+        if not ((api_path_segment is not None) ^ (full_url is not None)):
+            raise ValueError("必须提供 api_path_segment 或 full_url 中的一个，且仅一个")
+
+        token = await self._get_access_token()
+        headers = {"Authorization": f"Bearer {token}"}
+        if "headers" in kwargs:
+            headers.update(kwargs.pop("headers"))
+
+        url = full_url if full_url else f"{MS_GRAPH_URL}/me/drive/root{api_path_segment}"
+        async with httpx.AsyncClient(timeout=60.0) as client:
+            resp = await client.request(method, url, headers=headers, **kwargs)
+            if resp.status_code == 401:
+                self._access_token = None
+                token = await self._get_access_token()
+                headers["Authorization"] = f"Bearer {token}"
+                resp = await client.request(method, url, headers=headers, **kwargs)
+            return resp
+
+    def _format_item(self, item: Dict) -> Dict:
+        """
+        将 Graph API 返回的 item 格式化为统一的格式。
+        :param item: Graph API 返回的 item 字典。
+        :return: 格式化后的字典。
+        """
+        is_dir = "folder" in item
+        return {
+            "name": item["name"],
+            "is_dir": is_dir,
+            "size": 0 if is_dir else item.get("size", 0),
+            "mtime": int(datetime.fromisoformat(item["lastModifiedDateTime"].replace("Z", "+00:00")).timestamp()),
+            "type": "dir" if is_dir else "file",
+        }
+
+    async def list_dir(self, root: str, rel: str, page_num: int = 1, page_size: int = 50, sort_by: str = "name", sort_order: str = "asc") -> Tuple[List[Dict], int]:
+        """
+        列出目录内容。
+        由于 Graph API 不支持基于偏移($skip)的分页，此方法将获取所有项目，
+        :param root: 根路径 (在此适配器中未使用，通过配置的 root 确定)。
+        :param rel: 相对路径。
+        :param page_num: 页码。
+        :param page_size: 每页大小。
+        :param sort_by: 排序字段
+        :param sort_order: 排序顺序
+        :return: 文件/目录列表和总数。
+        """
+        api_path = self._get_api_path(rel)
+        children_path = f"{api_path}:/children" if api_path else "/children"
+        all_items = []
+        params = {"$top": 999}
+        resp = await self._request("GET", api_path_segment=children_path, params=params)
+
+        while True:
+            if resp.status_code == 404 and not all_items:
+                return [], 0
+            resp.raise_for_status()
+
+            try:
+                data = resp.json()
+            except Exception as e:
+                raise IOError(f"解析 Graph API 响应失败: {e}") from e
+
+            all_items.extend(data.get("value", []))
+            next_link = data.get("@odata.nextLink")
+
+            if not next_link:
+                break
+
+            resp = await self._request("GET", full_url=next_link)
+
+        formatted_items = [self._format_item(item) for item in all_items]
+        
+        # 排序
+        reverse = sort_order.lower() == "desc"
+        def get_sort_key(item):
+            key = (not item["is_dir"],)
+            sort_field = sort_by.lower()
+            if sort_field == "name":
+                key += (item["name"].lower(),)
+            elif sort_field == "size":
+                key += (item["size"],)
+            elif sort_field == "mtime":
+                key += (item["mtime"],)
+            else:
+                key += (item["name"].lower(),)
+            return key
+        formatted_items.sort(key=get_sort_key, reverse=reverse)
+
+        total_count = len(formatted_items)
+        start_idx = (page_num - 1) * page_size
+        end_idx = start_idx + page_size
+
+        return formatted_items[start_idx:end_idx], total_count
+
+    async def read_file(self, root: str, rel: str) -> bytes:
+        """
+        读取文件内容。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :return: 文件内容的字节流。
+        """
+        api_path = self._get_api_path(rel)
+        if not api_path:
+            raise IsADirectoryError("不能将根目录作为文件读取")
+
+        resp = await self._request("GET", api_path_segment=f"{api_path}:/content")
+        if resp.status_code == 404:
+            raise FileNotFoundError(rel)
+        resp.raise_for_status()
+        return resp.content
+
+    async def write_file(self, root: str, rel: str, data: bytes):
+        """
+        写入文件。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :param data: 文件内容的字节流。
+        """
+        api_path = self._get_api_path(rel)
+        if not api_path:
+            raise ValueError("不能直接写入根路径")
+        resp = await self._request("PUT", api_path_segment=f"{api_path}:/content", content=data)
+        resp.raise_for_status()
+
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]):
+        """
+        以流式方式写入文件。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :param data_iter: 文件内容的异步迭代器。
+        :return: 文件大小。
+        """
+        api_path = self._get_api_path(rel)
+        if not api_path:
+            raise ValueError("不能直接写入根路径")
+
+        resp = await self._request("PUT", api_path_segment=f"{api_path}:/content", content=data_iter)
+        resp.raise_for_status()
+        return resp.json().get("size", 0)
+
+    async def mkdir(self, root: str, rel: str):
+        """
+        创建目录。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        """
+        parent_path_str, new_dir_name = rel.rstrip(
+            '/').rsplit('/', 1) if '/' in rel.rstrip('/') else ('', rel)
+        parent_api_path = self._get_api_path(parent_path_str)
+
+        children_path = f"{parent_api_path}:/children" if parent_api_path else "/children"
+
+        payload = {
+            "name": new_dir_name,
+            "folder": {},
+            "@microsoft.graph.conflictBehavior": "fail"  # 如果已存在则失败
+        }
+        resp = await self._request("POST", api_path_segment=children_path, json=payload)
+        resp.raise_for_status()
+
+    async def delete(self, root: str, rel: str):
+        """
+        删除文件或目录。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        """
+        api_path = self._get_api_path(rel)
+        if not api_path:
+            raise ValueError("不能删除根目录")
+
+        resp = await self._request("DELETE", api_path_segment=api_path)
+        if resp.status_code not in (204, 404):
+            resp.raise_for_status()
+
+    async def move(self, root: str, src_rel: str, dst_rel: str):
+        """
+        移动或重命名文件/目录。
+        :param root: 根路径。
+        :param src_rel: 源相对路径。
+        :param dst_rel: 目标相对路径。
+        """
+        src_api_path = self._get_api_path(src_rel)
+        if not src_api_path:
+            raise ValueError("不能移动根目录")
+
+        dst_parent_rel, dst_name = dst_rel.rstrip(
+            '/').rsplit('/', 1) if '/' in dst_rel.rstrip('/') else ('', dst_rel)
+        dst_parent_api_path = self._get_api_path(dst_parent_rel)
+
+        # 获取父项目的 ID
+        parent_resp = await self._request("GET", api_path_segment=dst_parent_api_path)
+        parent_resp.raise_for_status()
+        parent_id = parent_resp.json()["id"]
+
+        payload = {
+            "parentReference": {"id": parent_id},
+            "name": dst_name
+        }
+        resp = await self._request("PATCH", api_path_segment=src_api_path, json=payload)
+        resp.raise_for_status()
+
+    async def rename(self, root: str, src_rel: str, dst_rel: str):
+        """
+        重命名文件或目录。
+        在 Graph API 中，移动和重命名是同一个 PATCH 操作。
+        """
+        await self.move(root, src_rel, dst_rel)
+
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False):
+        """
+        复制文件或目录。
+        :param root: 根路径。
+        :param src_rel: 源相对路径。
+        :param dst_rel: 目标相对路径。
+        :param overwrite: 是否覆盖 (在此 API 中未直接使用)。
+        """
+        src_api_path = self._get_api_path(src_rel)
+        if not src_api_path:
+            raise ValueError("不能复制根目录")
+
+        dst_parent_rel, dst_name = dst_rel.rstrip(
+            '/').rsplit('/', 1) if '/' in dst_rel.rstrip('/') else ('', dst_rel)
+        dst_parent_api_path = self._get_api_path(dst_parent_rel)
+
+        parent_resp = await self._request("GET", api_path_segment=dst_parent_api_path)
+        parent_resp.raise_for_status()
+        parent_id = parent_resp.json()["id"]
+
+        payload = {"parentReference": {"id": parent_id}, "name": dst_name}
+        copy_path = f"{src_api_path}:/copy"
+        resp = await self._request("POST", api_path_segment=copy_path, json=payload)
+        resp.raise_for_status()
+
+    async def stream_file(self, root: str, rel: str, range_header: str | None):
+        """
+        流式传输文件（支持范围请求）。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :param range_header: HTTP Range 头。
+        :return: FastAPI StreamingResponse 对象。
+        """
+        api_path = self._get_api_path(rel)
+        if not api_path:
+            raise IsADirectoryError("不能对目录进行流式传输")
+
+        resp = await self._request("GET", api_path_segment=api_path)
+        if resp.status_code == 404:
+            raise FileNotFoundError(rel)
+        resp.raise_for_status()
+        item_data = resp.json()
+
+        download_url = item_data.get("@microsoft.graph.downloadUrl")
+        if not download_url:
+            raise Exception("无法获取下载 URL")
+
+        file_size = item_data.get("size", 0)
+        content_type = item_data.get("file", {}).get(
+            "mimeType", "application/octet-stream")
+
+        start = 0
+        end = file_size - 1
+        status = 200
+        headers = {
+            "Accept-Ranges": "bytes",
+            "Content-Type": content_type,
+            "Content-Disposition": f"inline; filename=\"{item_data.get('name')}\""
+        }
+
+        if range_header and range_header.startswith("bytes="):
+            try:
+                part = range_header.removeprefix("bytes=")
+                s, e = part.split("-", 1)
+                if s.strip():
+                    start = int(s)
+                if e.strip():
+                    end = int(e)
+                if start >= file_size:
+                    raise HTTPException(416, "Requested Range Not Satisfiable")
+                if end >= file_size:
+                    end = file_size - 1
+                status = 206
+            except ValueError:
+                raise HTTPException(400, "Invalid Range header")
+
+            headers["Content-Range"] = f"bytes {start}-{end}/{file_size}"
+            headers["Content-Length"] = str(end - start + 1)
+        else:
+            headers["Content-Length"] = str(file_size)
+
+        async def file_iterator():
+            nonlocal start, end
+            async with httpx.AsyncClient(timeout=60.0) as client:
+                req_headers = {'Range': f'bytes={start}-{end}'}
+                async with client.stream("GET", download_url, headers=req_headers) as stream_resp:
+                    stream_resp.raise_for_status()
+                    async for chunk in stream_resp.aiter_bytes():
+                        yield chunk
+
+        return StreamingResponse(file_iterator(), status_code=status, headers=headers, media_type=content_type)
+
+    async def get_direct_download_response(self, root: str, rel: str):
+        if not self.enable_redirect_307:
+            return None
+
+        api_path = self._get_api_path(rel)
+        if not api_path:
+            raise IsADirectoryError("不能对目录进行直链重定向")
+
+        resp = await self._request("GET", api_path_segment=api_path)
+        if resp.status_code == 404:
+            raise FileNotFoundError(rel)
+        resp.raise_for_status()
+
+        item_data = resp.json()
+        download_url = item_data.get("@microsoft.graph.downloadUrl")
+        if not download_url:
+            return None
+
+        return Response(status_code=307, headers={"Location": download_url})
+
+    async def get_thumbnail(self, root: str, rel: str, size: str = "medium"):
+        """
+        获取文件的缩略图。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :param size: 缩略图大小 (large, medium, small)。
+        :return: 缩略图内容的字节流，或在不支持时返回 None。
+        """
+        api_path = self._get_api_path(rel)
+        if not api_path:
+            return None
+
+        thumb_path = f"{api_path}:/thumbnails/0/{size}"
+
+        try:
+            resp = await self._request("GET", api_path_segment=thumb_path)
+            if resp.status_code == 200:
+                thumb_data = resp.json()
+                async with httpx.AsyncClient(timeout=30.0) as client:
+                    thumb_resp = await client.get(thumb_data['url'])
+                    thumb_resp.raise_for_status()
+                    return thumb_resp.content
+            elif resp.status_code == 404:
+                return None
+            else:
+                resp.raise_for_status()
+        except Exception:
+            return None
+
+    async def stat_file(self, root: str, rel: str):
+        """
+        获取文件或目录的元数据。
+        :param root: 根路径。
+        :param rel: 相对路径。
+        :return: 格式化后的文件/目录信息。
+        """
+        api_path = self._get_api_path(rel)
+        resp = await self._request("GET", api_path_segment=api_path)
+        if resp.status_code == 404:
+            raise FileNotFoundError(rel)
+        resp.raise_for_status()
+        return self._format_item(resp.json())
+
+
+ADAPTER_TYPE = "onedrive"
+
+CONFIG_SCHEMA = [
+    {"key": "client_id", "label": "Client ID", "type": "string", "required": True},
+    {"key": "client_secret", "label": "Client Secret",
+        "type": "password", "required": True},
+    {"key": "refresh_token", "label": "Refresh Token", "type": "password",
+        "required": True, "help_text": "可以通过运行 'python -m domain.adapters.providers.onedrive' 获取"},
+    {"key": "root", "label": "根目录 (Root Path)", "type": "string",
+     "required": False, "placeholder": "默认为根目录 /"},
+    {"key": "enable_direct_download_307", "label": "Enable 307 redirect download", "type": "boolean", "default": False},
+]
+
+
+def ADAPTER_FACTORY(rec): return OneDriveAdapter(rec)

domain/adapters/providers/quark.py

@@ -0,0 +1,731 @@
+from __future__ import annotations
+import asyncio
+import base64
+import hashlib
+import mimetypes
+import os
+import time
+from typing import Dict, List, Tuple, Optional, AsyncIterator, Any
+
+import httpx
+from fastapi import HTTPException
+from fastapi.responses import StreamingResponse
+
+from models import StorageAdapter
+from .base import BaseAdapter
+
+
+# Quark 普通(UC)接口
+API_BASE = "https://drive.quark.cn/1/clouddrive"
+REFERER = "https://pan.quark.cn"
+PR = "ucpro"
+
+
+class QuarkAdapter:
+    """夸克网盘（Cookie 模式）
+
+    - 使用浏览器导出的 Cookie 进行鉴权
+    - 通过 Quark/UC 的 clouddrive 接口实现：列目录、读写、分片上传、基础操作
+    - 根 FID 固定为 "0"；路径解析通过名称遍历
+    """
+
+    def __init__(self, record: StorageAdapter):
+        self.record = record
+        cfg = record.config or {}
+        self.cookie: str = cfg.get("cookie") or cfg.get("Cookie")
+        self.root_fid: str = cfg.get("root_fid", "0")
+        def _as_bool(value: Any) -> bool:
+            if isinstance(value, bool):
+                return value
+            if isinstance(value, str):
+                return value.strip().lower() in {"1", "true", "yes", "on"}
+            return bool(value)
+
+        self.use_transcoding_address: bool = _as_bool(cfg.get("use_transcoding_address", False))
+        self.only_list_video_file: bool = _as_bool(cfg.get("only_list_video_file", False))
+
+        if not self.cookie:
+            raise ValueError("Quark 适配器需要 cookie 配置")
+
+        # 运行期缓存
+        self._dir_fid_cache: Dict[str, str] = {f"{self.root_fid}:": self.root_fid}
+        self._children_cache: Dict[str, List[Dict[str, Any]]] = {}
+
+        # UA 与超时
+        self._ua = (
+            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
+            "(KHTML, like Gecko) quark-cloud-drive/2.5.20 Chrome/100.0.4896.160 "
+            "Electron/18.3.5.4-b478491100 Safari/537.36 Channel/pckk_other_ch"
+        )
+        self._timeout = 30.0
+
+    # -----------------
+    # 工具与通用请求
+    # -----------------
+    def get_effective_root(self, sub_path: str | None) -> str:
+        return self.root_fid
+
+    async def _request(
+        self,
+        method: str,
+        pathname: str,
+        *,
+        json: Any | None = None,
+        params: Dict[str, str] | None = None,
+    ) -> Any:
+        headers = {
+            "Cookie": self._safe_cookie(self.cookie),
+            "Accept": "application/json, text/plain, */*",
+            "Referer": REFERER,
+            "User-Agent": self._ua,
+        }
+        query = {"pr": PR, "fr": "pc"}
+        if params:
+            query.update(params)
+        url = f"{API_BASE}{pathname}"
+
+        async with httpx.AsyncClient(timeout=self._timeout) as client:
+            resp = await client.request(method, url, headers=headers, params=query, json=json)
+            # 更新运行期 cookie（若返回 __puus/__pus）
+            try:
+                for key in ("__puus", "__pus"):
+                    v = resp.cookies.get(key)
+                    if v:
+                        # 简单替换/追加到 self.cookie
+                        self._set_cookie_kv(key, v)
+            except Exception:
+                pass
+
+            # 解析业务状态
+            data = None
+            try:
+                data = resp.json()
+            except Exception:
+                resp.raise_for_status()
+                return resp
+            status = data.get("status")
+            code = data.get("code")
+            msg = data.get("message") or ""
+            if (status is not None and status >= 400) or (code is not None and code != 0):
+                raise HTTPException(502, detail=f"Quark error status={status} code={code} msg={msg}")
+            return data
+
+    def _set_cookie_kv(self, key: str, value: str):
+        # 将指定键值写入 self.cookie（粗略字符串处理）
+        parts = [p.strip() for p in (self.cookie or "").replace("\r", "").replace("\n", "").split(";") if p.strip()]
+        found = False
+        for i, p in enumerate(parts):
+            if p.startswith(key + "="):
+                parts[i] = f"{key}={value}"
+                found = True
+                break
+        if not found:
+            parts.append(f"{key}={value}")
+        self.cookie = "; ".join(parts)
+
+    def _sanitize_cookie(self, cookie: str) -> str:
+        if not cookie:
+            return ""
+        # 去除换行与前后空白
+        cookie = cookie.replace("\r", "").replace("\n", "").strip()
+        # 统一分号分隔并去除多余空格/空段
+        parts = [p.strip() for p in cookie.split(";") if p.strip()]
+        return "; ".join(parts)
+
+    def _safe_cookie(self, cookie: str) -> str:
+        s = self._sanitize_cookie(cookie)
+        # 仅保留可见 ASCII (0x20-0x7E)
+        s = "".join(ch for ch in s if 32 <= ord(ch) <= 126)
+        return s
+
+    # -----------------
+    # 列表与路径解析
+    # -----------------
+    def _map_file_item(self, it: Dict[str, Any]) -> Dict[str, Any]:
+        # Quark/UC 列表项：file=true 表示文件；false 表示目录
+        is_dir = not bool(it.get("file", False))
+        updated_at_ms = int(it.get("updated_at", 0) or 0)
+        name = it.get("file_name") or it.get("filename") or it.get("name")
+        return {
+            "fid": it.get("fid"),
+            "name": name,
+            "is_dir": is_dir,
+            "size": 0 if is_dir else int(it.get("size", 0) or 0),
+            "mtime": updated_at_ms // 1000 if updated_at_ms else 0,
+            "type": "dir" if is_dir else "file",
+        }
+
+    async def _list_children(self, parent_fid: str) -> List[Dict[str, Any]]:
+        if parent_fid in self._children_cache:
+            return self._children_cache[parent_fid]
+
+        files: List[Dict[str, Any]] = []
+        page = 1
+        size = 100
+        total = None
+        while True:
+            qp = {"pdir_fid": parent_fid, "_size": str(size), "_page": str(page), "_fetch_total": "1"}
+            data = await self._request("GET", "/file/sort", params=qp)
+            d = (data or {}).get("data", {})
+            meta = (data or {}).get("metadata", {})
+            page_files = d.get("list", [])
+            files.extend(page_files)
+            if total is None:
+                total = meta.get("_total") or meta.get("total") or 0
+            if page * size >= int(total):
+                break
+            page += 1
+
+        mapped = [self._map_file_item(x) for x in files if (not self.only_list_video_file) or (not x.get("file")) or (x.get("category") == 1)]
+        self._children_cache[parent_fid] = mapped
+        return mapped
+
+    def _dir_cache_key(self, base_fid: str, rel: str) -> str:
+        return f"{base_fid}:{rel.strip('/')}"
+
+    async def _resolve_dir_fid_from(self, base_fid: str, rel: str) -> str:
+        key = rel.strip("/")
+        cache_key = self._dir_cache_key(base_fid, key)
+        if cache_key in self._dir_fid_cache:
+            return self._dir_fid_cache[cache_key]
+        if key == "":
+            self._dir_fid_cache[cache_key] = base_fid
+            return base_fid
+
+        parent_fid = base_fid
+        path_so_far = []
+        for seg in key.split("/"):
+            if seg == "":
+                continue
+            path_so_far.append(seg)
+            cache_key = self._dir_cache_key(base_fid, "/".join(path_so_far))
+            cached = self._dir_fid_cache.get(cache_key)
+            if cached:
+                parent_fid = cached
+                continue
+            children = await self._list_children(parent_fid)
+            found = next((c for c in children if c["is_dir"] and c["name"] == seg), None)
+            if not found:
+                raise FileNotFoundError(f"Directory not found: {seg}")
+            parent_fid = found["fid"]
+            self._dir_fid_cache[cache_key] = parent_fid
+
+        return parent_fid
+
+    async def _find_child(self, parent_fid: str, name: str) -> Optional[Dict[str, Any]]:
+        children = await self._list_children(parent_fid)
+        for it in children:
+            if it["name"] == name:
+                return it
+        return None
+
+    def _invalidate_children_cache(self, parent_fid: str):
+        if parent_fid in self._children_cache:
+            try:
+                del self._children_cache[parent_fid]
+            except Exception:
+                pass
+
+    # -----------------
+    # 目录与文件列表
+    # -----------------
+    async def list_dir(
+        self,
+        root: str,
+        rel: str,
+        page_num: int = 1,
+        page_size: int = 50,
+        sort_by: str = "name",
+        sort_order: str = "asc",
+    ) -> Tuple[List[Dict], int]:
+        base_fid = root or self.root_fid
+        fid = await self._resolve_dir_fid_from(base_fid, rel)
+        items = await self._list_children(fid)
+
+        # 排序，目录优先
+        reverse = sort_order.lower() == "desc"
+
+        def get_sort_key(item):
+            key = (not item["is_dir"],)
+            sf = sort_by.lower()
+            if sf == "name":
+                key += (item["name"].lower(),)
+            elif sf == "size":
+                key += (item["size"],)
+            elif sf == "mtime":
+                key += (item["mtime"],)
+            else:
+                key += (item["name"].lower(),)
+            return key
+
+        items.sort(key=get_sort_key, reverse=reverse)
+        total = len(items)
+        start = (page_num - 1) * page_size
+        end = start + page_size
+        return items[start:end], total
+
+    # -----------------
+    # 下载与流式下载
+    # -----------------
+    async def _get_download_url(self, fid: str) -> str:
+        data = await self._request("POST", "/file/download", json={"fids": [fid]})
+        arr = (data or {}).get("data", [])
+        if not arr:
+            raise HTTPException(502, detail="No download data returned by Quark")
+        url = arr[0].get("download_url") or arr[0].get("DownloadUrl")
+        if not url:
+            raise HTTPException(502, detail="No download_url returned by Quark")
+        return url
+
+    async def _get_transcoding_url(self, fid: str) -> Optional[str]:
+        try:
+            payload = {"fid": fid, "resolutions": "low,normal,high,super,2k,4k", "supports": "fmp4_av,m3u8,dolby_vision"}
+            data = await self._request("POST", "/file/v2/play/project", json=payload)
+            lst = (data or {}).get("data", {}).get("video_list", [])
+            for item in lst:
+                vi = item.get("video_info") or {}
+                url = vi.get("url")
+                if url:
+                    return url
+        except Exception:
+            return None
+        return None
+
+    def _is_video_name(self, name: str) -> bool:
+        mime, _ = mimetypes.guess_type(name)
+        return bool(mime and mime.startswith("video/"))
+
+    def _download_headers(self) -> Dict[str, str]:
+        return {"Cookie": self._safe_cookie(self.cookie), "User-Agent": self._ua, "Referer": REFERER}
+
+    async def read_file(self, root: str, rel: str) -> bytes:
+        if not rel or rel.endswith("/"):
+            raise IsADirectoryError("Path is a directory")
+        parent = rel.rsplit("/", 1)[0] if "/" in rel else ""
+        name = rel.rsplit("/", 1)[-1]
+        base_fid = root or self.root_fid
+        parent_fid = await self._resolve_dir_fid_from(base_fid, parent)
+        it = await self._find_child(parent_fid, name)
+        if not it or it["is_dir"]:
+            raise FileNotFoundError(rel)
+        url = await self._get_download_url(it["fid"])
+        headers = self._download_headers()
+        async with httpx.AsyncClient(timeout=None, follow_redirects=True) as client:
+            resp = await client.get(url, headers=headers)
+            if resp.status_code == 404:
+                raise FileNotFoundError(rel)
+            resp.raise_for_status()
+            return resp.content
+
+    async def stream_file(self, root: str, rel: str, range_header: str | None):
+        if not rel or rel.endswith("/"):
+            raise IsADirectoryError("Path is a directory")
+        parent = rel.rsplit("/", 1)[0] if "/" in rel else ""
+        name = rel.rsplit("/", 1)[-1]
+        base_fid = root or self.root_fid
+        parent_fid = await self._resolve_dir_fid_from(base_fid, parent)
+        it = await self._find_child(parent_fid, name)
+        if not it or it["is_dir"]:
+            raise FileNotFoundError(rel)
+        url = await self._get_download_url(it["fid"])
+        if self.use_transcoding_address and self._is_video_name(name):
+            tr = await self._get_transcoding_url(it["fid"]) 
+            if tr:
+                url = tr
+        dl_headers = self._download_headers()
+
+        # 预获取大小/是否支持范围
+        total_size: Optional[int] = None
+        async with httpx.AsyncClient(timeout=self._timeout, follow_redirects=True) as client:
+            try:
+                head_resp = await client.head(url, headers=dl_headers)
+                if head_resp.status_code == 200:
+                    cl = head_resp.headers.get("Content-Length")
+                    if cl and cl.isdigit():
+                        total_size = int(cl)
+            except Exception:
+                pass
+
+        mime, _ = mimetypes.guess_type(rel)
+        content_type = mime or "application/octet-stream"
+
+        # 解析 Range
+        start = 0
+        end: Optional[int] = None
+        status_code = 200
+        if range_header and range_header.startswith("bytes="):
+            status_code = 206
+            part = range_header.split("=", 1)[1]
+            s, e = part.split("-", 1)
+            if s.strip():
+                start = int(s)
+            if e.strip():
+                end = int(e)
+
+        if total_size is not None and end is None and status_code == 206:
+            end = total_size - 1
+        if end is not None and total_size is not None and end >= total_size:
+            end = total_size - 1
+        if total_size is not None and start >= total_size:
+            raise HTTPException(416, detail="Requested Range Not Satisfiable")
+
+        resp_headers: Dict[str, str] = {"Accept-Ranges": "bytes", "Content-Type": content_type}
+        if status_code == 206 and total_size is not None and end is not None:
+            resp_headers["Content-Range"] = f"bytes {start}-{end}/{total_size}"
+            resp_headers["Content-Length"] = str(end - start + 1)
+        elif total_size is not None:
+            resp_headers["Content-Length"] = str(total_size)
+
+        async def iterator():
+            headers = dict(dl_headers)
+            if status_code == 206 and end is not None:
+                headers["Range"] = f"bytes={start}-{end}"
+            async with httpx.AsyncClient(timeout=None, follow_redirects=True) as client:
+                async with client.stream("GET", url, headers=headers) as resp:
+                    if resp.status_code in (404, 416):
+                        await resp.aclose()
+                        raise HTTPException(resp.status_code, detail="Upstream not available")
+                    async for chunk in resp.aiter_bytes():
+                        if chunk:
+                            yield chunk
+
+        return StreamingResponse(iterator(), status_code=status_code, headers=resp_headers, media_type=content_type)
+
+    # -----------------
+    # 上传（大文件分片）
+    # -----------------
+    @staticmethod
+    def _md5_hex(b: bytes) -> str:
+        return hashlib.md5(b).hexdigest()
+
+    @staticmethod
+    def _sha1_hex(b: bytes) -> str:
+        return hashlib.sha1(b).hexdigest()
+
+    def _guess_mime(self, name: str) -> str:
+        mime, _ = mimetypes.guess_type(name)
+        return mime or "application/octet-stream"
+
+    async def _upload_pre(self, filename: str, size: int, parent_fid: str) -> Dict[str, Any]:
+        now_ms = int(time.time() * 1000)
+        body = {
+            "ccp_hash_update": True,
+            "dir_name": "",
+            "file_name": filename,
+            "format_type": self._guess_mime(filename),
+            "l_created_at": now_ms,
+            "l_updated_at": now_ms,
+            "pdir_fid": parent_fid,
+            "size": size,
+        }
+        data = await self._request("POST", "/file/upload/pre", json=body)
+        return data
+
+    async def write_file(self, root: str, rel: str, data: bytes):
+        async def gen():
+            yield data
+        return await self.write_file_stream(root, rel, gen())
+
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]):
+        if not rel or rel.endswith("/"):
+            raise HTTPException(400, detail="Invalid file path")
+
+        parent = rel.rsplit("/", 1)[0] if "/" in rel else ""
+        name = rel.rsplit("/", 1)[-1]
+        base_fid = root or self.root_fid
+        parent_fid = await self._resolve_dir_fid_from(base_fid, parent)
+
+        # 将数据落盘到临时文件，同时计算 MD5/SHA1
+        import tempfile
+
+        md5 = hashlib.md5()
+        sha1 = hashlib.sha1()
+        total = 0
+        with tempfile.NamedTemporaryFile(delete=False) as tf:
+            tmp_path = tf.name
+            try:
+                async for chunk in data_iter:
+                    if not chunk:
+                        continue
+                    total += len(chunk)
+                    md5.update(chunk)
+                    sha1.update(chunk)
+                    tf.write(chunk)
+            finally:
+                tf.flush()
+
+        md5_hex = md5.hexdigest()
+        sha1_hex = sha1.hexdigest()
+
+        # 预上传，拿到上传信息
+        pre_resp = await self._upload_pre(name, total, parent_fid)
+        pre_data = pre_resp.get("data", {})
+
+        # hash 秒传
+        hash_body = {"md5": md5_hex, "sha1": sha1_hex, "task_id": pre_data.get("task_id")}
+        hash_resp = await self._request("POST", "/file/update/hash", json=hash_body)
+        if (hash_resp.get("data") or {}).get("finish") is True:
+            try:
+                os.unlink(tmp_path)
+            except Exception:
+                pass
+            # 刷新父目录缓存
+            self._invalidate_children_cache(parent_fid)
+            return total
+
+        # 分片上传
+        part_size = int((pre_resp.get("metadata") or {}).get("part_size") or 0)
+        if part_size <= 0:
+            raise HTTPException(502, detail="Invalid part_size from Quark")
+
+        bucket = pre_data.get("bucket")
+        obj_key = pre_data.get("obj_key")
+        upload_id = pre_data.get("upload_id")
+        upload_url = pre_data.get("upload_url")
+        if not (bucket and obj_key and upload_id and upload_url):
+            raise HTTPException(502, detail="Upload pre missing fields")
+
+        # 计算 host 与基础 URL
+        try:
+            upload_host = upload_url.split("://", 1)[1]
+        except Exception:
+            upload_host = upload_url
+        base_url = f"https://{bucket}.{upload_host}/{obj_key}"
+
+        # 分片循环
+        etags: List[str] = []
+        oss_ua = "aliyun-sdk-js/6.6.1 Chrome 98.0.4758.80 on Windows 10 64-bit"
+        async with httpx.AsyncClient(timeout=None, follow_redirects=True) as client:
+            with open(tmp_path, "rb") as rf:
+                part_number = 1
+                left = total
+                while left > 0:
+                    sz = min(part_size, left)
+                    data_bytes = rf.read(sz)
+                    if len(data_bytes) != sz:
+                        raise IOError("Failed to read part bytes")
+                    now_str = time.strftime("%a, %d %b %Y %H:%M:%S GMT", time.gmtime())
+                    # 申请签名
+                    auth_meta = (
+                        "PUT\n\n"
+                        f"{self._guess_mime(name)}\n"
+                        f"{now_str}\n"
+                        f"x-oss-date:{now_str}\n"
+                        f"x-oss-user-agent:{oss_ua}\n"
+                        f"/{bucket}/{obj_key}?partNumber={part_number}&uploadId={upload_id}"
+                    )
+                    auth_req_body = {"auth_info": pre_data.get("auth_info"), "auth_meta": auth_meta, "task_id": pre_data.get("task_id")}
+                    auth_resp = await self._request("POST", "/file/upload/auth", json=auth_req_body)
+                    auth_key = (auth_resp.get("data") or {}).get("auth_key")
+                    if not auth_key:
+                        raise HTTPException(502, detail="upload/auth missing auth_key")
+
+                    put_headers = {
+                        "Authorization": auth_key,
+                        "Content-Type": self._guess_mime(name),
+                        "Referer": REFERER + "/",
+                        "x-oss-date": now_str,
+                        "x-oss-user-agent": oss_ua,
+                    }
+                    put_url = f"{base_url}?partNumber={part_number}&uploadId={upload_id}"
+                    put_resp = await client.put(put_url, headers=put_headers, content=data_bytes)
+                    if put_resp.status_code != 200:
+                        raise HTTPException(502, detail=f"Upload part failed status={put_resp.status_code} text={put_resp.text}")
+                    etag = put_resp.headers.get("Etag", "")
+                    etags.append(etag)
+                    left -= sz
+                    part_number += 1
+
+        # 组合 commit xml
+        parts_xml = [f"<Part>\n<PartNumber>{i+1}</PartNumber>\n<ETag>{etags[i]}</ETag>\n</Part>\n" for i in range(len(etags))]
+        body_xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<CompleteMultipartUpload>\n" + "".join(parts_xml) + "</CompleteMultipartUpload>"
+        content_md5 = base64.b64encode(hashlib.md5(body_xml.encode("utf-8")).digest()).decode("ascii")
+        callback = pre_data.get("callback") or {}
+        try:
+            import json as _json
+            callback_b64 = base64.b64encode(_json.dumps(callback).encode("utf-8")).decode("ascii")
+        except Exception:
+            callback_b64 = ""
+
+        now_str = time.strftime("%a, %d %b %Y %H:%M:%S GMT", time.gmtime())
+        auth_meta_commit = (
+            "POST\n"
+            f"{content_md5}\n"
+            "application/xml\n"
+            f"{now_str}\n"
+            f"x-oss-callback:{callback_b64}\n"
+            f"x-oss-date:{now_str}\n"
+            f"x-oss-user-agent:{oss_ua}\n"
+            f"/{bucket}/{obj_key}?uploadId={upload_id}"
+        )
+        auth_commit_resp = await self._request("POST", "/file/upload/auth", json={"auth_info": pre_data.get("auth_info"), "auth_meta": auth_meta_commit, "task_id": pre_data.get("task_id")})
+        auth_key_commit = (auth_commit_resp.get("data") or {}).get("auth_key")
+        if not auth_key_commit:
+            raise HTTPException(502, detail="upload/auth(commit) missing auth_key")
+
+        async with httpx.AsyncClient(timeout=None, follow_redirects=True) as client:
+            commit_headers = {
+                "Authorization": auth_key_commit,
+                "Content-MD5": content_md5,
+                "Content-Type": "application/xml",
+                "Referer": REFERER + "/",
+                "x-oss-callback": callback_b64,
+                "x-oss-date": now_str,
+                "x-oss-user-agent": oss_ua,
+            }
+            commit_url = f"{base_url}?uploadId={upload_id}"
+            r = await client.post(commit_url, headers=commit_headers, content=body_xml.encode("utf-8"))
+            if r.status_code != 200:
+                raise HTTPException(502, detail=f"Upload commit failed status={r.status_code} text={r.text}")
+
+        # finish
+        await self._request("POST", "/file/upload/finish", json={"obj_key": obj_key, "task_id": pre_data.get("task_id")})
+        # 端合并存在轻微延迟，等待再刷新缓存
+        try:
+            await asyncio.sleep(1.0)
+        except Exception:
+            pass
+
+        try:
+            os.unlink(tmp_path)
+        except Exception:
+            pass
+        # 失效父目录缓存，确保后续列表可见
+        self._invalidate_children_cache(parent_fid)
+        return total
+
+    # -----------------
+    # 基本文件操作
+    # -----------------
+    async def mkdir(self, root: str, rel: str):
+        if not rel or rel == "/":
+            raise HTTPException(400, detail="Cannot create root")
+        parent = rel.rstrip("/")
+        parent_rel, name = (parent.rsplit("/", 1) if "/" in parent else ("", parent))
+        if not name:
+            raise HTTPException(400, detail="Invalid directory name")
+        pdir = await self._resolve_dir_fid_from(root or self.root_fid, parent_rel)
+        await self._request("POST", "/file", json={"dir_init_lock": False, "dir_path": "", "file_name": name, "pdir_fid": pdir})
+        self._invalidate_children_cache(pdir)
+
+    async def delete(self, root: str, rel: str):
+        # 解析对象 fid + 父目录，用于失效缓存
+        base_fid = root or self.root_fid
+        if rel == "" or rel.endswith("/"):
+            parent_rel = rel.rstrip("/")
+            target_fid = await self._resolve_dir_fid_from(base_fid, parent_rel)
+            parent_of_target = await self._resolve_dir_fid_from(base_fid, (parent_rel.rsplit("/", 1)[0] if "/" in parent_rel else ""))
+        else:
+            parent_rel, name = (rel.rsplit("/", 1) if "/" in rel else ("", rel))
+            parent_of_target = await self._resolve_dir_fid_from(base_fid, parent_rel)
+            it = await self._find_child(parent_of_target, name)
+            if not it:
+                return
+            target_fid = it["fid"]
+        await self._request("POST", "/file/delete", json={"action_type": 1, "exclude_fids": [], "filelist": [target_fid]})
+        self._invalidate_children_cache(parent_of_target)
+
+    async def move(self, root: str, src_rel: str, dst_rel: str):
+        # 支持跨目录与重命名：先移动到父目录，后重命名（若需要）
+        src_parent_rel, src_name = (src_rel.rsplit("/", 1) if "/" in src_rel else ("", src_rel))
+        dst_parent_rel, dst_name = (dst_rel.rsplit("/", 1) if "/" in dst_rel else ("", dst_rel))
+
+        base_fid = root or self.root_fid
+        src_parent_fid = await self._resolve_dir_fid_from(base_fid, src_parent_rel)
+        obj = await self._find_child(src_parent_fid, src_name)
+        if not obj:
+            raise FileNotFoundError(src_rel)
+        dst_parent_fid = await self._resolve_dir_fid_from(base_fid, dst_parent_rel)
+
+        if src_parent_fid != dst_parent_fid:
+            await self._request("POST", "/file/move", json={"action_type": 1, "exclude_fids": [], "filelist": [obj["fid"]], "to_pdir_fid": dst_parent_fid})
+            self._invalidate_children_cache(src_parent_fid)
+            self._invalidate_children_cache(dst_parent_fid)
+
+        if obj["name"] != dst_name:
+            await self._request("POST", "/file/rename", json={"fid": obj["fid"], "file_name": dst_name})
+            self._invalidate_children_cache(dst_parent_fid)
+
+    async def rename(self, root: str, src_rel: str, dst_rel: str):
+        src_parent_rel, src_name = (src_rel.rsplit("/", 1) if "/" in src_rel else ("", src_rel))
+        base_fid = root or self.root_fid
+        src_parent_fid = await self._resolve_dir_fid_from(base_fid, src_parent_rel)
+        obj = await self._find_child(src_parent_fid, src_name)
+        if not obj:
+            raise FileNotFoundError(src_rel)
+        dst_name = dst_rel.rsplit("/", 1)[-1]
+        await self._request("POST", "/file/rename", json={"fid": obj["fid"], "file_name": dst_name})
+        self._invalidate_children_cache(src_parent_fid)
+
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False):
+        raise NotImplementedError("QuarkOpen does not support copy via open API")
+
+    # -----------------
+    # STAT / EXISTS / 辅助
+    # -----------------
+    async def stat_file(self, root: str, rel: str):
+        # 通过父目录列表获取元数据
+        base_fid = root or self.root_fid
+        if rel == "" or rel.endswith("/"):
+            # 目录
+            fid = await self._resolve_dir_fid_from(base_fid, rel.rstrip("/"))
+            return {"name": rel.rstrip("/").split("/")[-1] if rel else "", "is_dir": True, "size": 0, "mtime": 0, "type": "dir", "fid": fid}
+        parent_rel, name = (rel.rsplit("/", 1) if "/" in rel else ("", rel))
+        parent_fid = await self._resolve_dir_fid_from(base_fid, parent_rel)
+        it = await self._find_child(parent_fid, name)
+        if not it:
+            raise FileNotFoundError(rel)
+        return it
+
+    async def exists(self, root: str, rel: str) -> bool:
+        try:
+            base_fid = root or self.root_fid
+            if rel == "" or rel.endswith("/"):
+                await self._resolve_dir_fid_from(base_fid, rel.rstrip("/"))
+                return True
+            parent_rel, name = (rel.rsplit("/", 1) if "/" in rel else ("", rel))
+            parent_fid = await self._resolve_dir_fid_from(base_fid, parent_rel)
+            it = await self._find_child(parent_fid, name)
+            return it is not None
+        except FileNotFoundError:
+            return False
+
+    async def stat_path(self, root: str, rel: str):
+        # 用于 move/copy 前的预检查调试
+        try:
+            base_fid = root or self.root_fid
+            if rel == "" or rel.endswith("/"):
+                fid = await self._resolve_dir_fid_from(base_fid, rel.rstrip("/"))
+                return {"exists": True, "is_dir": True, "path": rel, "fid": fid}
+            parent_rel, name = (rel.rsplit("/", 1) if "/" in rel else ("", rel))
+            parent_fid = await self._resolve_dir_fid_from(base_fid, parent_rel)
+            it = await self._find_child(parent_fid, name)
+            if it:
+                return {"exists": True, "is_dir": it["is_dir"], "path": rel, "fid": it["fid"]}
+            return {"exists": False, "is_dir": None, "path": rel}
+        except FileNotFoundError:
+            return {"exists": False, "is_dir": None, "path": rel}
+
+    async def _resolve_target_fid(self, rel: str, *, base_fid: Optional[str] = None) -> str:
+        base = base_fid or self.root_fid
+        if rel == "" or rel.endswith("/"):
+            return await self._resolve_dir_fid_from(base, rel.rstrip("/"))
+        parent_rel, name = (rel.rsplit("/", 1) if "/" in rel else ("", rel))
+        parent_fid = await self._resolve_dir_fid_from(base, parent_rel)
+        it = await self._find_child(parent_fid, name)
+        if not it:
+            raise FileNotFoundError(rel)
+        return it["fid"]
+
+
+ADAPTER_TYPE = "quark"
+
+CONFIG_SCHEMA = [
+    {"key": "cookie", "label": "Cookie", "type": "password", "required": True, "placeholder": "从 pan.quark.cn 复制"},
+    {"key": "root_fid", "label": "根 FID", "type": "string", "required": False, "default": "0"},
+    {"key": "use_transcoding_address", "label": "视频转码直链", "type": "boolean", "required": False, "default": False},
+    {"key": "only_list_video_file", "label": "仅列出视频文件", "type": "boolean", "required": False, "default": False},
+]
+
+def ADAPTER_FACTORY(rec: StorageAdapter) -> BaseAdapter:
+    return QuarkAdapter(rec)

domain/adapters/providers/s3.py

@@ -0,0 +1,348 @@
+from __future__ import annotations
+import asyncio
+import mimetypes
+from datetime import datetime
+from typing import List, Dict, Tuple, AsyncIterator
+from urllib.parse import quote
+
+import aioboto3
+from botocore.exceptions import ClientError
+from fastapi import HTTPException
+from fastapi.responses import StreamingResponse
+from models import StorageAdapter
+
+
+class S3Adapter:
+    """S3 兼容对象存储适配器"""
+
+    def __init__(self, record: StorageAdapter):
+        self.record = record
+        cfg = record.config
+        self.bucket_name = cfg.get("bucket_name")
+        self.aws_access_key_id = cfg.get("access_key_id")
+        self.aws_secret_access_key = cfg.get("secret_access_key")
+        self.region_name = cfg.get("region_name")
+        self.endpoint_url = cfg.get("endpoint_url")
+        self.root = cfg.get("root", "").strip("/")
+
+        if not all([self.bucket_name, self.aws_access_key_id, self.aws_secret_access_key]):
+            raise ValueError(
+                "S3 适配器需要 bucket_name, access_key_id, 和 secret_access_key")
+
+        self.session = aioboto3.Session(
+            aws_access_key_id=self.aws_access_key_id,
+            aws_secret_access_key=self.aws_secret_access_key,
+            region_name=self.region_name,
+        )
+
+    def get_effective_root(self, sub_path: str | None) -> str:
+        """获取 S3 中的有效根路径 (key prefix)"""
+        if sub_path:
+            return f"{self.root}/{sub_path.strip('/')}".strip("/")
+        return self.root
+
+    def _get_s3_key(self, rel_path: str) -> str:
+        """将相对路径转换为 S3 key"""
+        rel_path = rel_path.strip("/")
+        if self.root:
+            return f"{self.root}/{rel_path}"
+        return rel_path
+
+    def _get_client(self):
+        return self.session.client("s3", endpoint_url=self.endpoint_url)
+
+    async def list_dir(self, root: str, rel: str, page_num: int = 1, page_size: int = 50, sort_by: str = "name", sort_order: str = "asc") -> Tuple[List[Dict], int]:
+        prefix = self._get_s3_key(rel)
+        if prefix and not prefix.endswith("/"):
+            prefix += "/"
+
+        all_items = []
+
+        async with self._get_client() as s3:
+            paginator = s3.get_paginator("list_objects_v2")
+            async for result in paginator.paginate(Bucket=self.bucket_name, Prefix=prefix, Delimiter="/"):
+                # 添加子目录
+                for common_prefix in result.get("CommonPrefixes", []):
+                    dir_name = common_prefix.get(
+                        "Prefix").removeprefix(prefix).strip("/")
+                    if dir_name:
+                        all_items.append({
+                            "name": dir_name,
+                            "is_dir": True,
+                            "size": 0,
+                            "mtime": 0,
+                            "type": "dir",
+                        })
+
+                # 添加文件
+                for content in result.get("Contents", []):
+                    file_key = content.get("Key")
+                    if file_key == prefix:  # 忽略目录本身
+                        continue
+                    file_name = file_key.removeprefix(prefix)
+                    if file_name:
+                        all_items.append({
+                            "name": file_name,
+                            "is_dir": False,
+                            "size": content.get("Size", 0),
+                            "mtime": int(content.get("LastModified", datetime.now()).timestamp()),
+                            "type": "file",
+                        })
+
+        # 在内存中排序和分页
+        reverse = sort_order.lower() == "desc"
+        def get_sort_key(item):
+            key = (not item["is_dir"],)
+            sort_field = sort_by.lower()
+            if sort_field == "name":
+                key += (item["name"].lower(),)
+            elif sort_field == "size":
+                key += (item["size"],)
+            elif sort_field == "mtime":
+                key += (item["mtime"],)
+            else:
+                key += (item["name"].lower(),)
+            return key
+        all_items.sort(key=get_sort_key, reverse=reverse)
+        
+        total_count = len(all_items)
+        start_idx = (page_num - 1) * page_size
+        end_idx = start_idx + page_size
+
+        return all_items[start_idx:end_idx], total_count
+
+    async def read_file(self, root: str, rel: str) -> bytes:
+        key = self._get_s3_key(rel)
+        async with self._get_client() as s3:
+            try:
+                resp = await s3.get_object(Bucket=self.bucket_name, Key=key)
+                return await resp["Body"].read()
+            except ClientError as e:
+                if e.response["Error"]["Code"] == "NoSuchKey":
+                    raise FileNotFoundError(rel)
+                raise
+
+    async def write_file(self, root: str, rel: str, data: bytes):
+        key = self._get_s3_key(rel)
+        async with self._get_client() as s3:
+            await s3.put_object(Bucket=self.bucket_name, Key=key, Body=data)
+
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]):
+        key = self._get_s3_key(rel)
+        MIN_PART_SIZE = 5 * 1024 * 1024
+        
+        async with self._get_client() as s3:
+            mpu = await s3.create_multipart_upload(Bucket=self.bucket_name, Key=key)
+            upload_id = mpu['UploadId']
+            
+            parts = []
+            part_number = 1
+            total_size = 0
+            buffer = bytearray()
+            
+            try:
+                async for chunk in data_iter:
+                    if not chunk:
+                        continue
+                    buffer.extend(chunk)
+                    
+                    while len(buffer) >= MIN_PART_SIZE:
+                        part_data = buffer[:MIN_PART_SIZE]
+                        del buffer[:MIN_PART_SIZE]
+                        
+                        part = await s3.upload_part(
+                            Bucket=self.bucket_name,
+                            Key=key,
+                            PartNumber=part_number,
+                            UploadId=upload_id,
+                            Body=part_data
+                        )
+                        
+                        parts.append({'PartNumber': part_number, 'ETag': part['ETag']})
+                        total_size += len(part_data)
+                        part_number += 1
+
+                if buffer:
+                    part = await s3.upload_part(
+                        Bucket=self.bucket_name,
+                        Key=key,
+                        PartNumber=part_number,
+                        UploadId=upload_id,
+                        Body=bytes(buffer)
+                    )
+                    parts.append({'PartNumber': part_number, 'ETag': part['ETag']})
+                    total_size += len(buffer)
+                
+                await s3.complete_multipart_upload(
+                    Bucket=self.bucket_name,
+                    Key=key,
+                    UploadId=upload_id,
+                    MultipartUpload={'Parts': parts}
+                )
+            except Exception as e:
+                await s3.abort_multipart_upload(
+                    Bucket=self.bucket_name,
+                    Key=key,
+                    UploadId=upload_id
+                )
+                raise IOError(f"S3 stream upload failed: {e}") from e
+
+        return total_size
+
+    async def mkdir(self, root: str, rel: str):
+        key = self._get_s3_key(rel)
+        if not key.endswith("/"):
+            key += "/"
+        async with self._get_client() as s3:
+            await s3.put_object(Bucket=self.bucket_name, Key=key, Body=b"")
+
+    async def delete(self, root: str, rel: str):
+        key = self._get_s3_key(rel)
+        async with self._get_client() as s3:
+            is_dir_like = False
+            try:
+                head = await s3.head_object(Bucket=self.bucket_name, Key=key)
+                if head['ContentLength'] == 0 and key.endswith('/'):
+                    is_dir_like = True
+            except ClientError as e:
+                if e.response['Error']['Code'] != '404': 
+                    raise
+
+            # 如果是目录，删除目录下的所有对象
+            if is_dir_like or not await self.stat_file(root, rel):  
+                dir_key = key if key.endswith('/') else key + '/'
+                paginator = s3.get_paginator("list_objects_v2")
+                objects_to_delete = []
+                async for result in paginator.paginate(Bucket=self.bucket_name, Prefix=dir_key):
+                    for content in result.get("Contents", []):
+                        objects_to_delete.append({"Key": content["Key"]})
+                if objects_to_delete:
+                    await s3.delete_objects(Bucket=self.bucket_name, Delete={"Objects": objects_to_delete})
+            # 如果是文件，直接删除
+            else:
+                await s3.delete_object(Bucket=self.bucket_name, Key=key)
+
+    async def move(self, root: str, src_rel: str, dst_rel: str):
+        await self.copy(root, src_rel, dst_rel, overwrite=True)
+        await self.delete(root, src_rel)
+
+    async def rename(self, root: str, src_rel: str, dst_rel: str):
+        await self.move(root, src_rel, dst_rel)
+
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False):
+        src_key = self._get_s3_key(src_rel)
+        dst_key = self._get_s3_key(dst_rel)
+
+        async with self._get_client() as s3:
+            if not overwrite:
+                try:
+                    await s3.head_object(Bucket=self.bucket_name, Key=dst_key)
+                    raise FileExistsError(dst_rel)
+                except ClientError as e:
+                    if e.response["Error"]["Code"] != "404":
+                        raise
+
+            copy_source = {"Bucket": self.bucket_name, "Key": src_key}
+            await s3.copy_object(CopySource=copy_source, Bucket=self.bucket_name, Key=dst_key)
+
+    async def stat_file(self, root: str, rel: str):
+        key = self._get_s3_key(rel)
+        async with self._get_client() as s3:
+            try:
+                head = await s3.head_object(Bucket=self.bucket_name, Key=key)
+                return {
+                    "name": rel.split("/")[-1],
+                    "is_dir": False,
+                    "size": head["ContentLength"],
+                    "mtime": int(head["LastModified"].timestamp()),
+                    "type": "file",
+                }
+            except ClientError as e:
+                if e.response["Error"]["Code"] == "404":
+                    # 检查是否为一个 "目录"
+                    dir_key = key if key.endswith('/') else key + '/'
+                    resp = await s3.list_objects_v2(Bucket=self.bucket_name, Prefix=dir_key, MaxKeys=1)
+                    if resp.get('KeyCount', 0) > 0:
+                        return {
+                            "name": rel.split("/")[-1],
+                            "is_dir": True,
+                            "size": 0,
+                            "mtime": 0, 
+                            "type": "dir",
+                        }
+                    raise FileNotFoundError(rel)
+                raise
+
+    async def stream_file(self, root: str, rel: str, range_header: str | None):
+        key = self._get_s3_key(rel)
+        async with self._get_client() as s3:
+            try:
+                head = await s3.head_object(Bucket=self.bucket_name, Key=key)
+                file_size = head["ContentLength"]
+                content_type = head.get("ContentType", mimetypes.guess_type(key)[
+                                        0] or "application/octet-stream")
+            except ClientError as e:
+                if e.response["Error"]["Code"] == "404":
+                    raise HTTPException(
+                        status_code=404, detail="File not found")
+                raise
+
+            start = 0
+            end = file_size - 1
+            status = 200
+            headers = {
+                "Accept-Ranges": "bytes",
+                "Content-Type": content_type,
+                "Content-Length": str(file_size),
+                "Content-Disposition": f"inline; filename=\"{quote(rel.split('/')[-1])}\""
+            }
+
+            if range_header:
+                range_val = range_header.strip().partition("=")[2]
+                s, _, e = range_val.partition("-")
+                try:
+                    start = int(s) if s else 0
+                    end = int(e) if e else file_size - 1
+                    if start >= file_size or end >= file_size or start > end:
+                        raise HTTPException(
+                            status_code=416, detail="Requested Range Not Satisfiable")
+                    status = 206
+                    headers["Content-Length"] = str(end - start + 1)
+                    headers["Content-Range"] = f"bytes {start}-{end}/{file_size}"
+                except ValueError:
+                    raise HTTPException(
+                        status_code=400, detail="Invalid Range header")
+
+            range_arg = f"bytes={start}-{end}"
+
+            async def iterator():
+                try:
+                    resp = await s3.get_object(Bucket=self.bucket_name, Key=key, Range=range_arg)
+                    body = resp["Body"]
+                    while chunk := await body.read(65536):
+                        yield chunk
+                except Exception as e:
+                    raise
+
+        return StreamingResponse(iterator(), status_code=status, headers=headers, media_type=content_type)
+
+
+ADAPTER_TYPE = "s3"
+
+CONFIG_SCHEMA = [
+    {"key": "bucket_name", "label": "Bucket 名称",
+        "type": "string", "required": True},
+    {"key": "access_key_id", "label": "Access Key ID",
+        "type": "string", "required": True},
+    {"key": "secret_access_key", "label": "Secret Access Key",
+        "type": "password", "required": True},
+    {"key": "region_name", "label": "区域 (Region)", "type": "string",
+     "required": False, "placeholder": "例如 us-east-1"},
+    {"key": "endpoint_url", "label": "Endpoint URL", "type": "string",
+        "required": False, "placeholder": "对于 S3 兼容存储, 例如 https://minio.example.com"},
+    {"key": "root", "label": "根路径 (Root Path)", "type": "string",
+     "required": False, "placeholder": "在 bucket 内的路径前缀"},
+]
+
+
+def ADAPTER_FACTORY(rec): return S3Adapter(rec)

domain/adapters/providers/sftp.py

@@ -0,0 +1,440 @@
+from __future__ import annotations
+
+import asyncio
+import mimetypes
+import stat as statmod
+from typing import List, Dict, Tuple, AsyncIterator, Optional
+
+from fastapi import HTTPException
+from fastapi.responses import StreamingResponse
+import paramiko
+
+from models import StorageAdapter
+
+
+def _join_remote(root: str, rel: str) -> str:
+    root = (root or "/").rstrip("/") or "/"
+    rel = (rel or "").lstrip("/")
+    if not rel:
+        return root
+    return f"{root}/{rel}"
+
+
+class SFTPAdapter:
+    def __init__(self, record: StorageAdapter):
+        self.record = record
+        cfg = record.config
+        self.host: str = cfg.get("host")
+        self.port: int = int(cfg.get("port", 22))
+        self.username: str | None = cfg.get("username")
+        self.password: str | None = cfg.get("password")
+        self.timeout: int = int(cfg.get("timeout", 15))
+        self.root_path: str = cfg.get("root")  # 必填
+        self.allow_unknown_host: bool = bool(cfg.get("allow_unknown_host", True))
+
+        if not self.host:
+            raise ValueError("SFTP adapter requires 'host'")
+        if not self.username or not self.password:
+            raise ValueError("SFTP adapter requires 'username' and 'password'")
+        if not self.root_path:
+            raise ValueError("SFTP adapter requires 'root'")
+
+    def get_effective_root(self, sub_path: str | None) -> str:
+        base = self.root_path.rstrip("/") or "/"
+        if sub_path:
+            return _join_remote(base, sub_path)
+        return base
+
+    def _connect(self) -> paramiko.SFTPClient:
+        ssh = paramiko.SSHClient()
+        if self.allow_unknown_host:
+            ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+        ssh.connect(
+            hostname=self.host,
+            port=self.port,
+            username=self.username,
+            password=self.password,
+            timeout=self.timeout,
+            allow_agent=False,
+            look_for_keys=False,
+        )
+        return ssh.open_sftp()
+
+    async def list_dir(self, root: str, rel: str, page_num: int = 1, page_size: int = 50, sort_by: str = "name", sort_order: str = "asc") -> Tuple[List[Dict], int]:
+        path = _join_remote(root, rel)
+
+        def _do_list() -> List[Dict]:
+            sftp = self._connect()
+            try:
+                attrs = sftp.listdir_attr(path)
+                entries: List[Dict] = []
+                for a in attrs:
+                    name = a.filename
+                    is_dir = statmod.S_ISDIR(a.st_mode)
+                    entries.append({
+                        "name": name,
+                        "is_dir": is_dir,
+                        "size": 0 if is_dir else int(a.st_size or 0),
+                        "mtime": int(a.st_mtime or 0),
+                        "type": "dir" if is_dir else "file",
+                    })
+                return entries
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        entries = await asyncio.to_thread(_do_list)
+
+        reverse = sort_order.lower() == "desc"
+
+        def get_sort_key(item):
+            key = (not item["is_dir"],)
+            f = sort_by.lower()
+            if f == "name":
+                key += (item["name"].lower(),)
+            elif f == "size":
+                key += (item.get("size", 0),)
+            elif f == "mtime":
+                key += (item.get("mtime", 0),)
+            else:
+                key += (item["name"].lower(),)
+            return key
+
+        entries.sort(key=get_sort_key, reverse=reverse)
+        total = len(entries)
+        start = (page_num - 1) * page_size
+        end = start + page_size
+        return entries[start:end], total
+
+    async def read_file(self, root: str, rel: str) -> bytes:
+        path = _join_remote(root, rel)
+
+        def _do_read() -> bytes:
+            sftp = self._connect()
+            try:
+                with sftp.open(path, "rb") as f:
+                    return f.read()
+            except FileNotFoundError:
+                raise
+            except IOError as e:
+                if getattr(e, "errno", None) == 2:
+                    raise FileNotFoundError(rel)
+                raise
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        return await asyncio.to_thread(_do_read)
+
+    async def write_file(self, root: str, rel: str, data: bytes):
+        path = _join_remote(root, rel)
+
+        def _ensure_dirs(sftp: paramiko.SFTPClient, dir_path: str):
+            parts = [p for p in dir_path.strip("/").split("/") if p]
+            cur = "/"
+            for p in parts:
+                cur = _join_remote(cur, p)
+                try:
+                    sftp.mkdir(cur)
+                except IOError:
+                    # likely exists
+                    pass
+
+        def _do_write():
+            sftp = self._connect()
+            try:
+                parent = "/" if "/" not in path.strip("/") else path.rsplit("/", 1)[0]
+                _ensure_dirs(sftp, parent)
+                with sftp.open(path, "wb") as f:
+                    f.write(data)
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        await asyncio.to_thread(_do_write)
+
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]):
+        buf = bytearray()
+        async for chunk in data_iter:
+            if chunk:
+                buf.extend(chunk)
+        await self.write_file(root, rel, bytes(buf))
+        return len(buf)
+
+    async def mkdir(self, root: str, rel: str):
+        path = _join_remote(root, rel)
+
+        def _do_mkdir():
+            sftp = self._connect()
+            try:
+                parts = [p for p in path.strip("/").split("/") if p]
+                cur = "/"
+                for p in parts:
+                    cur = _join_remote(cur, p)
+                    try:
+                        sftp.mkdir(cur)
+                    except IOError:
+                        pass
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        await asyncio.to_thread(_do_mkdir)
+
+    async def delete(self, root: str, rel: str):
+        path = _join_remote(root, rel)
+
+        def _do_delete():
+            sftp = self._connect()
+            try:
+                # Try file remove first
+                try:
+                    sftp.remove(path)
+                    return
+                except IOError:
+                    pass
+
+                def _rm_tree(dp: str):
+                    try:
+                        for a in sftp.listdir_attr(dp):
+                            child = _join_remote(dp, a.filename)
+                            if statmod.S_ISDIR(a.st_mode):
+                                _rm_tree(child)
+                            else:
+                                try:
+                                    sftp.remove(child)
+                                except Exception:
+                                    pass
+                        sftp.rmdir(dp)
+                    except IOError:
+                        pass
+
+                _rm_tree(path)
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        await asyncio.to_thread(_do_delete)
+
+    async def move(self, root: str, src_rel: str, dst_rel: str):
+        src = _join_remote(root, src_rel)
+        dst = _join_remote(root, dst_rel)
+
+        def _do_move():
+            sftp = self._connect()
+            try:
+                # ensure dst parent exists
+                parent = "/" if "/" not in dst.strip("/") else dst.rsplit("/", 1)[0]
+                parts = [p for p in parent.strip("/").split("/") if p]
+                cur = "/"
+                for p in parts:
+                    cur = _join_remote(cur, p)
+                    try:
+                        sftp.mkdir(cur)
+                    except IOError:
+                        pass
+                sftp.rename(src, dst)
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        await asyncio.to_thread(_do_move)
+
+    async def rename(self, root: str, src_rel: str, dst_rel: str):
+        await self.move(root, src_rel, dst_rel)
+
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False):
+        src = _join_remote(root, src_rel)
+        dst = _join_remote(root, dst_rel)
+
+        def _is_dir() -> bool:
+            sftp = self._connect()
+            try:
+                st = sftp.stat(src)
+                return statmod.S_ISDIR(st.st_mode)
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        if await asyncio.to_thread(_is_dir):
+            await self.mkdir(root, dst_rel)
+
+            children, _ = await self.list_dir(root, src_rel, page_num=1, page_size=10_000)
+            for ent in children:
+                child_src = f"{src_rel.rstrip('/')}/{ent['name']}"
+                child_dst = f"{dst_rel.rstrip('/')}/{ent['name']}"
+                await self.copy(root, child_src, child_dst, overwrite)
+            return
+
+        # file copy
+        data = await self.read_file(root, src_rel)
+        if not overwrite:
+            try:
+                await self.stat_file(root, dst_rel)
+                raise FileExistsError(dst_rel)
+            except FileNotFoundError:
+                pass
+        await self.write_file(root, dst_rel, data)
+
+    async def stat_file(self, root: str, rel: str):
+        path = _join_remote(root, rel)
+
+        def _do_stat():
+            sftp = self._connect()
+            try:
+                st = sftp.stat(path)
+                is_dir = statmod.S_ISDIR(st.st_mode)
+                info = {
+                    "name": rel.split("/")[-1],
+                    "is_dir": is_dir,
+                    "size": 0 if is_dir else int(st.st_size or 0),
+                    "mtime": int(st.st_mtime or 0),
+                    "type": "dir" if is_dir else "file",
+                    "path": path,
+                }
+                return info
+            except FileNotFoundError:
+                raise
+            except IOError as e:
+                if getattr(e, "errno", None) == 2:
+                    raise FileNotFoundError(rel)
+                raise
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        return await asyncio.to_thread(_do_stat)
+
+    async def exists(self, root: str, rel: str) -> bool:
+        try:
+            await self.stat_file(root, rel)
+            return True
+        except FileNotFoundError:
+            return False
+        except Exception:
+            return False
+
+    async def stream_file(self, root: str, rel: str, range_header: str | None):
+        path = _join_remote(root, rel)
+
+        def _get_stat():
+            sftp = self._connect()
+            try:
+                st = sftp.stat(path)
+                return int(st.st_size or 0)
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        file_size = await asyncio.to_thread(_get_stat)
+        if file_size is None:
+            raise HTTPException(404, detail="File not found")
+
+        mime, _ = mimetypes.guess_type(rel)
+        content_type = mime or "application/octet-stream"
+
+        start = 0
+        end = file_size - 1
+        status = 200
+        headers = {
+            "Accept-Ranges": "bytes",
+            "Content-Type": content_type,
+            "Content-Length": str(file_size),
+        }
+
+        if range_header and range_header.startswith("bytes="):
+            try:
+                s, e = (range_header.removeprefix("bytes=").split("-", 1))
+                if s.strip():
+                    start = int(s)
+                if e.strip():
+                    end = int(e)
+                if start >= file_size:
+                    raise HTTPException(416, detail="Requested Range Not Satisfiable")
+                if end >= file_size:
+                    end = file_size - 1
+                status = 206
+                headers["Content-Length"] = str(end - start + 1)
+                headers["Content-Range"] = f"bytes {start}-{end}/{file_size}"
+            except ValueError:
+                raise HTTPException(400, detail="Invalid Range header")
+
+        queue: asyncio.Queue[Optional[bytes]] = asyncio.Queue(maxsize=8)
+
+        def _worker():
+            sftp = self._connect()
+            try:
+                with sftp.open(path, "rb") as f:
+                    f.seek(start)
+                    remaining = end - start + 1
+                    chunk_size = 64 * 1024
+                    while remaining > 0:
+                        to_read = chunk_size if remaining > chunk_size else remaining
+                        data = f.read(to_read)
+                        if not data:
+                            break
+                        try:
+                            queue.put_nowait(data)
+                        except Exception:
+                            break
+                        remaining -= len(data)
+                try:
+                    queue.put_nowait(None)
+                except Exception:
+                    pass
+            finally:
+                try:
+                    sftp.close()
+                except Exception:
+                    pass
+
+        async def agen():
+            worker_fut = asyncio.to_thread(_worker)
+            try:
+                while True:
+                    chunk = await queue.get()
+                    if chunk is None:
+                        break
+                    yield chunk
+            finally:
+                try:
+                    await worker_fut
+                except Exception:
+                    pass
+
+        return StreamingResponse(agen(), status_code=status, headers=headers, media_type=content_type)
+
+
+ADAPTER_TYPE = "sftp"
+
+CONFIG_SCHEMA = [
+    {"key": "host", "label": "主机", "type": "string", "required": True, "placeholder": "sftp.example.com"},
+    {"key": "port", "label": "端口", "type": "number", "required": False, "default": 22},
+    {"key": "username", "label": "用户名", "type": "string", "required": True},
+    {"key": "password", "label": "密码", "type": "password", "required": True},
+    {"key": "root", "label": "根路径", "type": "string", "required": True, "placeholder": "/data"},
+    {"key": "timeout", "label": "超时(秒)", "type": "number", "required": False, "default": 15},
+    {"key": "allow_unknown_host", "label": "允许未知主机指纹", "type": "boolean", "required": False, "default": True},
+]
+
+
+def ADAPTER_FACTORY(rec: StorageAdapter):
+    return SFTPAdapter(rec)

domain/adapters/providers/telegram.py

@@ -0,0 +1,360 @@
+from __future__ import annotations
+from typing import List, Dict, Tuple, AsyncIterator
+import io
+import os
+from models import StorageAdapter
+from telethon import TelegramClient
+from telethon.sessions import StringSession
+import socks
+
+# 适配器类型标识
+ADAPTER_TYPE = "telegram"
+
+# 适配器配置项定义
+CONFIG_SCHEMA = [
+    {"key": "api_id", "label": "API ID", "type": "string", "required": True, "help_text": "从 my.telegram.org 获取"},
+    {"key": "api_hash", "label": "API Hash", "type": "password", "required": True, "help_text": "从 my.telegram.org 获取"},
+    {"key": "session_string", "label": "Session String", "type": "password", "required": True, "help_text": "通过 generate_session.py 生成"},
+    {"key": "chat_id", "label": "Chat ID", "type": "string", "required": True, "placeholder": "频道/群组的ID或用户名, 例如: -100123456789 或 'channel_username'"},
+    {"key": "proxy_protocol", "label": "代理协议", "type": "string", "required": False, "placeholder": "例如: socks5, http"},
+    {"key": "proxy_host", "label": "代理主机", "type": "string", "required": False, "placeholder": "例如: 127.0.0.1"},
+    {"key": "proxy_port", "label": "代理端口", "type": "number", "required": False, "placeholder": "例如: 1080"},
+]
+
+class TelegramAdapter:
+    """Telegram 存储适配器 (使用用户 Session)"""
+
+    def __init__(self, record: StorageAdapter):
+        self.record = record
+        cfg = record.config
+        self.api_id = int(cfg.get("api_id"))
+        self.api_hash = cfg.get("api_hash")
+        self.session_string = cfg.get("session_string")
+        self.chat_id_str = cfg.get("chat_id")
+        
+        # 代理设置
+        self.proxy_protocol = cfg.get("proxy_protocol")
+        self.proxy_host = cfg.get("proxy_host")
+        self.proxy_port = cfg.get("proxy_port")
+        
+        self.proxy = None
+        if self.proxy_protocol and self.proxy_host and self.proxy_port:
+            proto_map = {
+                "socks5": socks.SOCKS5,
+                "http": socks.HTTP,
+            }
+            proxy_type = proto_map.get(self.proxy_protocol.lower())
+            if proxy_type:
+                self.proxy = (proxy_type, self.proxy_host, int(self.proxy_port))
+
+        try:
+            self.chat_id = int(self.chat_id_str)
+        except (ValueError, TypeError):
+            self.chat_id = self.chat_id_str
+
+        if not all([self.api_id, self.api_hash, self.session_string, self.chat_id]):
+            raise ValueError("Telegram 适配器需要 api_id, api_hash, session_string 和 chat_id")
+
+    def _get_client(self) -> TelegramClient:
+        """创建一个新的 TelegramClient 实例"""
+        return TelegramClient(StringSession(self.session_string), self.api_id, self.api_hash, proxy=self.proxy)
+
+    def get_effective_root(self, sub_path: str | None) -> str:
+        return ""
+
+    async def list_dir(self, root: str, rel: str, page_num: int = 1, page_size: int = 50, sort_by: str = "name", sort_order: str = "asc") -> Tuple[List[Dict], int]:
+        if rel:
+            return [], 0
+
+        client = self._get_client()
+        entries = []
+        try:
+            await client.connect()
+            messages = await client.get_messages(self.chat_id, limit=200)
+            for message in messages:
+                if not message:
+                    continue
+
+                media = message.document or message.video or message.photo
+                if not media:
+                    continue
+
+                file_meta = message.file
+                if not file_meta:
+                    continue
+
+                filename = file_meta.name
+                if not filename:
+                    if message.text and '.' in message.text and len(message.text) < 256 and '\n' not in message.text:
+                        filename = message.text
+                    else:
+                        filename = f"unknown_{message.id}"
+
+                size = file_meta.size
+                if size is None:
+                    # 兼容缺失 size 的情况
+                    if hasattr(media, "size") and media.size is not None:
+                        size = media.size
+                    elif message.photo and getattr(message.photo, "sizes", None):
+                        photo_size = message.photo.sizes[-1]
+                        size = getattr(photo_size, "size", 0) or 0
+                    else:
+                        size = 0
+
+                entries.append({
+                    "name": f"{message.id}_{filename}",
+                    "is_dir": False,
+                    "size": size,
+                    "mtime": int(message.date.timestamp()),
+                    "type": "file",
+                })
+        finally:
+            if client.is_connected():
+                await client.disconnect()
+
+        # 排序
+        reverse = sort_order.lower() == "desc"
+        def get_sort_key(item):
+            key = (not item["is_dir"],)
+            sort_field = sort_by.lower()
+            if sort_field == "name":
+                key += (item["name"].lower(),)
+            elif sort_field == "size":
+                key += (item["size"],)
+            elif sort_field == "mtime":
+                key += (item["mtime"],)
+            else:
+                key += (item["name"].lower(),)
+            return key
+        entries.sort(key=get_sort_key, reverse=reverse)
+        
+        total_count = len(entries)
+        
+        # 分页
+        start_idx = (page_num - 1) * page_size
+        end_idx = start_idx + page_size
+        page_entries = entries[start_idx:end_idx]
+        
+        return page_entries, total_count
+
+    async def read_file(self, root: str, rel: str) -> bytes:
+        try:
+            message_id_str, _ = rel.split('_', 1)
+            message_id = int(message_id_str)
+        except (ValueError, IndexError):
+            raise FileNotFoundError(f"无效的文件路径格式: {rel}")
+
+        client = self._get_client()
+        try:
+            await client.connect()
+            message = await client.get_messages(self.chat_id, ids=message_id)
+            if not message or not (message.document or message.video or message.photo):
+                raise FileNotFoundError(f"在频道 {self.chat_id} 中未找到消息ID为 {message_id} 的文件")
+            
+            file_bytes = await client.download_media(message, file=bytes)
+            return file_bytes
+        finally:
+            if client.is_connected():
+                await client.disconnect()
+
+    async def write_file(self, root: str, rel: str, data: bytes):
+        """将字节数据作为文件上传"""
+        client = self._get_client()
+        file_like = io.BytesIO(data)
+        file_like.name = os.path.basename(rel) or "file"
+
+        try:
+            await client.connect()
+            await client.send_file(self.chat_id, file_like, caption=file_like.name)
+        finally:
+            if client.is_connected():
+                await client.disconnect()
+
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]):
+        """以流式方式上传文件"""
+        client = self._get_client()
+        filename = os.path.basename(rel) or "file"
+        import tempfile
+        temp_dir = tempfile.gettempdir()
+        temp_path = os.path.join(temp_dir, filename)
+        
+        total_size = 0
+        try:
+            with open(temp_path, "wb") as f:
+                async for chunk in data_iter:
+                    if chunk:
+                        f.write(chunk)
+                        total_size += len(chunk)
+            
+            await client.connect()
+            await client.send_file(self.chat_id, temp_path, caption=filename)
+
+        finally:
+            if os.path.exists(temp_path):
+                os.remove(temp_path)
+            if client.is_connected():
+                await client.disconnect()
+        return total_size
+
+    async def mkdir(self, root: str, rel: str):
+        raise NotImplementedError("Telegram 适配器不支持创建目录。")
+
+    async def delete(self, root: str, rel: str):
+        """删除一个文件 (即一条消息)"""
+        try:
+            message_id_str, _ = rel.split('_', 1)
+            message_id = int(message_id_str)
+        except (ValueError, IndexError):
+            raise FileNotFoundError(f"无效的文件路径格式，无法解析消息ID: {rel}")
+
+        client = self._get_client()
+        try:
+            await client.connect()
+            result = await client.delete_messages(self.chat_id, [message_id])
+            if not result or not result[0].pts:
+                 raise FileNotFoundError(f"在 {self.chat_id} 中删除消息 {message_id} 失败，可能消息不存在或无权限")
+        finally:
+            if client.is_connected():
+                await client.disconnect()
+
+    async def move(self, root: str, src_rel: str, dst_rel: str):
+        raise NotImplementedError("Telegram 适配器不支持移动。")
+
+    async def rename(self, root: str, src_rel: str, dst_rel: str):
+        raise NotImplementedError("Telegram 适配器不支持重命名。")
+
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False):
+        raise NotImplementedError("Telegram 适配器不支持复制。")
+
+    async def stream_file(self, root: str, rel: str, range_header: str | None):
+        from fastapi.responses import StreamingResponse
+        from fastapi import HTTPException
+
+        try:
+            message_id_str, _ = rel.split('_', 1)
+            message_id = int(message_id_str)
+        except (ValueError, IndexError):
+            raise HTTPException(status_code=400, detail=f"无效的文件路径格式: {rel}")
+
+        client = self._get_client()
+        
+        try:
+            await client.connect()
+            message = await client.get_messages(self.chat_id, ids=message_id)
+            media = message.document or message.video or message.photo
+            if not message or not media:
+                raise FileNotFoundError(f"在频道 {self.chat_id} 中未找到消息ID为 {message_id} 的文件")
+
+            file_meta = message.file
+            file_size = file_meta.size if file_meta and file_meta.size is not None else None
+            if file_size is None:
+                if hasattr(media, "size") and media.size is not None:
+                    file_size = media.size
+                elif message.photo and getattr(message.photo, "sizes", None):
+                    photo_size = message.photo.sizes[-1]
+                    file_size = getattr(photo_size, "size", 0) or 0
+                else:
+                    file_size = 0
+
+            mime_type = None
+            if file_meta and getattr(file_meta, "mime_type", None):
+                mime_type = file_meta.mime_type
+            if not mime_type:
+                if hasattr(media, "mime_type") and media.mime_type:
+                    mime_type = media.mime_type
+                elif message.photo:
+                    mime_type = "image/jpeg"
+                else:
+                    mime_type = "application/octet-stream"
+
+            start = 0
+            end = file_size - 1
+            status = 200
+            
+            headers = {
+                "Accept-Ranges": "bytes",
+                "Content-Type": mime_type,
+                "Content-Length": str(file_size),
+            }
+
+            if range_header:
+                try:
+                    range_val = range_header.strip().partition("=")[2]
+                    s, _, e = range_val.partition("-")
+                    start = int(s) if s else 0
+                    end = int(e) if e else file_size - 1
+                    if start >= file_size or end >= file_size or start > end:
+                        raise HTTPException(status_code=416, detail="Requested Range Not Satisfiable")
+                    status = 206
+                    headers["Content-Length"] = str(end - start + 1)
+                    headers["Content-Range"] = f"bytes {start}-{end}/{file_size}"
+                except ValueError:
+                    raise HTTPException(status_code=400, detail="Invalid Range header")
+
+            async def iterator():
+                try:
+                    limit = end - start + 1
+                    downloaded = 0
+                    
+                    async for chunk in client.iter_download(media, offset=start):
+                        if downloaded + len(chunk) > limit:
+                            yield chunk[:limit - downloaded]
+                            break
+                        yield chunk
+                        downloaded += len(chunk)
+                        if downloaded >= limit:
+                            break
+                finally:
+                    if client.is_connected():
+                        await client.disconnect()
+
+            return StreamingResponse(iterator(), status_code=status, headers=headers)
+
+        except FileNotFoundError as e:
+            if client.is_connected():
+                await client.disconnect()
+            raise HTTPException(status_code=404, detail=str(e))
+        except Exception as e:
+            if client.is_connected():
+                await client.disconnect()
+            raise HTTPException(status_code=500, detail=f"Streaming failed: {str(e)}")
+
+    async def stat_file(self, root: str, rel: str):
+        try:
+            message_id_str, filename = rel.split('_', 1)
+            message_id = int(message_id_str)
+        except (ValueError, IndexError):
+            raise FileNotFoundError(f"无效的文件路径格式: {rel}")
+
+        client = self._get_client()
+        try:
+            await client.connect()
+            message = await client.get_messages(self.chat_id, ids=message_id)
+            media = message.document or message.video or message.photo
+            if not message or not media:
+                raise FileNotFoundError(f"在频道 {self.chat_id} 中未找到消息ID为 {message_id} 的文件")
+
+            file_meta = message.file
+            size = file_meta.size if file_meta and file_meta.size is not None else None
+            if size is None:
+                if hasattr(media, "size") and media.size is not None:
+                    size = media.size
+                elif message.photo and getattr(message.photo, "sizes", None):
+                    photo_size = message.photo.sizes[-1]
+                    size = getattr(photo_size, "size", 0) or 0
+                else:
+                    size = 0
+
+            return {
+                "name": rel,
+                "is_dir": False,
+                "size": size,
+                "mtime": int(message.date.timestamp()),
+                "type": "file",
+            }
+        finally:
+            if client.is_connected():
+                await client.disconnect()
+
+def ADAPTER_FACTORY(rec: StorageAdapter) -> TelegramAdapter:
+    return TelegramAdapter(rec)

domain/adapters/providers/webdav.py

@@ -0,0 +1,493 @@
+from __future__ import annotations
+from typing import List, Dict, Optional, Tuple, AsyncIterator
+import httpx
+from urllib.parse import urljoin, quote
+from urllib.parse import urlparse, unquote
+import xml.etree.ElementTree as ET
+from models import StorageAdapter
+import mimetypes
+import logging
+from fastapi import HTTPException
+from fastapi.responses import StreamingResponse, Response
+
+NS = {"d": "DAV:"}
+
+
+class WebDAVAdapter:
+    def __init__(self, record: StorageAdapter):
+        self.record = record
+        cfg = record.config
+        self.base_url: str = cfg.get("base_url", "").rstrip('/') + '/'
+        if not self.base_url.startswith("http"):
+            raise ValueError("webdav requires base_url http/https")
+        self.username = cfg.get("username")
+        self.password = cfg.get("password")
+        self.timeout = cfg.get("timeout", 15)
+
+    def get_effective_root(self, sub_path: str | None) -> str:
+        base_url = self.record.config.get("base_url", "").rstrip('/') + '/'
+        if sub_path:
+            return base_url + sub_path.strip('/') + '/'
+        return base_url
+
+    def _client(self):
+        auth = (self.username, self.password) if self.username else None
+        return httpx.AsyncClient(auth=auth, timeout=self.timeout, follow_redirects=True)
+
+    def _build_url(self, rel: str):
+        rel = rel.strip('/')
+        return self.base_url if not rel else urljoin(self.base_url, quote(rel) + ('/' if rel.endswith('/') else ''))
+
+    async def list_dir(self, root: str, rel: str, page_num: int = 1, page_size: int = 50, sort_by: str = "name", sort_order: str = "asc") -> Tuple[List[Dict], int]:
+        raw_url = self._build_url(rel)
+        url = raw_url if raw_url.endswith('/') else raw_url + '/'
+        depth = "1"
+        body = """<?xml version="1.0" encoding="utf-8" ?>
+<d:propfind xmlns:d="DAV:">
+  <d:prop>
+    <d:displayname />
+    <d:getcontentlength />
+    <d:getlastmodified />
+    <d:resourcetype />
+  </d:prop>
+</d:propfind>"""
+        async with self._client() as client:
+            resp = await client.request("PROPFIND", url, data=body, headers={"Depth": depth})
+            resp.raise_for_status()
+            xml_text = resp.text
+        root_el = ET.fromstring(xml_text)
+        all_entries: List[Dict] = []
+        parsed_req = urlparse(url)
+        base_path = parsed_req.path
+        if not base_path.endswith('/'):
+            base_path += '/'
+        seen = set()
+        for resp_el in root_el.findall("d:response", NS):
+            href_el = resp_el.find("d:href", NS)
+            if href_el is None:
+                continue
+            href = (href_el.text or "")
+            parsed_href = urlparse(href)
+            href_path = parsed_href.path or ""
+            if not href_path.startswith(base_path):
+                continue
+            rel_path = href_path[len(base_path):].strip('/')
+            if rel_path == "":
+                continue
+            name = unquote(rel_path.split('/')[0]).rstrip('/')
+            if not name or name in seen:
+                continue
+            seen.add(name)
+            propstat = resp_el.find("d:propstat", NS)
+            if propstat is None:
+                continue
+            prop = propstat.find("d:prop", NS)
+            if prop is None:
+                continue
+            size_el = prop.find("d:getcontentlength", NS)
+            lm_el = prop.find("d:getlastmodified", NS)
+            rt_el = prop.find("d:resourcetype", NS)
+            is_dir = rt_el.find(
+                "d:collection", NS) is not None if rt_el is not None else href_path.endswith('/')
+            size = int(
+                size_el.text) if size_el is not None and size_el.text and size_el.text.isdigit() else 0
+            
+            from email.utils import parsedate_to_datetime
+            mtime = 0
+            if lm_el is not None and lm_el.text:
+                try:
+                    mtime = int(parsedate_to_datetime(lm_el.text).timestamp())
+                except Exception:
+                    mtime = 0
+
+            all_entries.append({
+                "name": name,
+                "is_dir": is_dir,
+                "size": 0 if is_dir else size,
+                "mtime": mtime,
+                "type": "dir" if is_dir else "file",
+            })
+
+        # 排序所有条目
+        reverse = sort_order.lower() == "desc"
+        def get_sort_key(item):
+            key = (not item["is_dir"],)
+            sort_field = sort_by.lower()
+            if sort_field == "name":
+                key += (item["name"].lower(),)
+            elif sort_field == "size":
+                key += (item["size"],)
+            elif sort_field == "mtime":
+                key += (item["mtime"],)
+            else:
+                key += (item["name"].lower(),)
+            return key
+        all_entries.sort(key=get_sort_key, reverse=reverse)
+        
+        total_count = len(all_entries)
+
+        # 应用分页
+        start_idx = (page_num - 1) * page_size
+        end_idx = start_idx + page_size
+        page_entries = all_entries[start_idx:end_idx]
+
+        return page_entries, total_count
+
+    async def read_file(self, root: str, rel: str) -> bytes:
+        url = self._build_url(rel)
+        async with self._client() as client:
+            resp = await client.get(url)
+            if resp.status_code == 404:
+                raise FileNotFoundError(rel)
+            resp.raise_for_status()
+            return resp.content
+
+    async def write_file(self, root: str, rel: str, data: bytes):
+        url = self._build_url(rel)
+        async with self._client() as client:
+            resp = await client.put(url, content=data)
+            resp.raise_for_status()
+
+    async def mkdir(self, root: str, rel: str):
+        url = self._build_url(rel.rstrip('/') + '/')
+        async with self._client() as client:
+            resp = await client.request("MKCOL", url)
+            if resp.status_code not in (201, 405):
+                resp.raise_for_status()
+
+    async def delete(self, root: str, rel: str):
+        url = self._build_url(rel)
+        async with self._client() as client:
+            resp = await client.delete(url)
+            if resp.status_code not in (204, 200, 404):
+                resp.raise_for_status()
+
+    async def move(self, root: str, src_rel: str, dst_rel: str):
+        src_url = self._build_url(src_rel)
+        dst_url = self._build_url(dst_rel)
+        async with self._client() as client:
+            resp = await client.request("MOVE", src_url, headers={"Destination": dst_url})
+            resp.raise_for_status()
+
+    async def rename(self, root: str, src_rel: str, dst_rel: str):
+        src_url = self._build_url(src_rel)
+        dst_url = self._build_url(dst_rel)
+        async with self._client() as client:
+            resp = await client.request("MOVE", src_url, headers={"Destination": dst_url})
+            resp.raise_for_status()
+
+    async def get_file_size(self, root: str, rel: str) -> int:
+        """获取文件大小"""
+        url = self._build_url(rel)
+        async with self._client() as client:
+            # 使用HEAD请求获取文件信息
+            resp = await client.head(url)
+            if resp.status_code == 404:
+                raise FileNotFoundError(rel)
+            resp.raise_for_status()
+
+            content_length = resp.headers.get('content-length')
+            if content_length:
+                return int(content_length)
+
+            # 如果HEAD不返回content-length，尝试PROPFIND
+            body = """<?xml version="1.0" encoding="utf-8" ?>
+<d:propfind xmlns:d="DAV:">
+  <d:prop>
+    <d:getcontentlength />
+  </d:prop>
+</d:propfind>"""
+            resp = await client.request("PROPFIND", url, data=body, headers={"Depth": "0"})
+            resp.raise_for_status()
+
+            root_el = ET.fromstring(resp.text)
+            for resp_el in root_el.findall("d:response", NS):
+                propstat = resp_el.find("d:propstat", NS)
+                if propstat is None:
+                    continue
+                prop = propstat.find("d:prop", NS)
+                if prop is None:
+                    continue
+                size_el = prop.find("d:getcontentlength", NS)
+                if size_el is not None and size_el.text and size_el.text.isdigit():
+                    return int(size_el.text)
+
+            return 0
+
+    async def read_file_range(self, root: str, rel: str, start: int, end: Optional[int] = None) -> bytes:
+        """读取文件的指定范围"""
+        url = self._build_url(rel)
+
+        # 构建Range头
+        if end is None:
+            range_header = f"bytes={start}-"
+        else:
+            range_header = f"bytes={start}-{end}"
+
+        async with self._client() as client:
+            resp = await client.get(url, headers={"Range": range_header})
+            if resp.status_code == 404:
+                raise FileNotFoundError(rel)
+            if resp.status_code not in (200, 206):  # 206是Partial Content
+                resp.raise_for_status()
+            return resp.content
+
+    async def stream_file(self, root: str, rel: str, range_header: str | None):
+        url = self._build_url(rel)
+        mime, _ = mimetypes.guess_type(rel)
+        content_type = mime or "application/octet-stream"
+        logger = logging.getLogger(__name__)
+        timeout = self.timeout
+        auth = (self.username, self.password) if self.username else None
+
+        client_start = 0
+        client_end = None
+        status_code = 200
+        if range_header and range_header.startswith("bytes="):
+            status_code = 206
+            part = range_header.removeprefix("bytes=")
+            s, e = part.split("-", 1)
+            if s.strip():
+                client_start = int(s)
+            if e.strip():
+                client_end = int(e)
+
+        total_size = None
+        accept_ranges = False
+        async with httpx.AsyncClient(timeout=timeout, auth=auth, follow_redirects=True) as client:
+            try:
+                head_resp = await client.head(url)
+                if head_resp.status_code == 404:
+                    raise HTTPException(404, detail="File not found")
+                if head_resp.status_code == 200:
+                    cl = head_resp.headers.get("Content-Length")
+                    if cl and cl.isdigit():
+                        total_size = int(cl)
+                    ar = head_resp.headers.get("Accept-Ranges", "").lower()
+                    accept_ranges = "bytes" in ar
+            except HTTPException:
+                raise
+            except Exception as e:
+                logger.debug("HEAD failed %s err=%s", url, e)
+            if total_size is None and (client_end is None):
+                try:
+                    probe_req = client.build_request("GET", url, headers={"Range": "bytes=0-0"})
+                    probe_resp = await client.send(probe_req, stream=True)
+                    if probe_resp.status_code in (200, 206):
+                        cr = probe_resp.headers.get("Content-Range")
+                        if cr and "/" in cr:
+                            try:
+                                total_size = int(cr.rsplit("/", 1)[1])
+                            except Exception:
+                                pass
+                    await probe_resp.aclose()
+                except Exception as e:
+                    logger.debug("Probe 0-0 failed %s err=%s", url, e)
+
+        if total_size is not None and client_end is None:
+            client_end = total_size - 1
+        if client_end is not None and client_end < client_start:
+            raise HTTPException(416, detail="Requested Range Not Satisfiable")
+
+        # 若客户端未请求范围且上游不支持 Range，直接透传
+        if status_code == 200 and (range_header is None) and not accept_ranges:
+            async with httpx.AsyncClient(timeout=timeout, auth=auth, follow_redirects=True) as client:
+                req = client.build_request("GET", url)
+                resp = await client.send(req, stream=True)
+                if resp.status_code == 404:
+                    await resp.aclose()
+                    raise HTTPException(404, detail="File not found")
+                upstream_ct = resp.headers.get("Content-Type", content_type)
+
+                async def passthrough():
+                    try:
+                        async for chunk in resp.aiter_bytes():
+                            if chunk:
+                                yield chunk
+                    finally:
+                        await resp.aclose()
+                return StreamingResponse(passthrough(), status_code=resp.status_code,
+                                         headers={"Accept-Ranges": "bytes",
+                                                  "X-VFS-Remote-Status": str(resp.status_code)},
+                                         media_type=upstream_ct)
+
+        SEGMENT_SIZE = 5 * 1024 * 1024
+        MAX_RETRY_PER_SEG = 3
+        FIRST_BYTE_MAX_RETRY = 3
+
+        resp_headers = {
+            "Accept-Ranges": "bytes",
+            "Content-Type": content_type,
+            "X-VFS-Segmented": "1",
+        }
+        if status_code == 206 and total_size is not None:
+            resp_headers["Content-Range"] = f"bytes {client_start}-{client_end}/{total_size}"
+
+        async def segmented_body():
+            current = client_start
+            first_byte_sent = False
+            while True:
+                if client_end is not None and current > client_end:
+                    break
+                seg_start = current
+                seg_end = (min(seg_start + SEGMENT_SIZE - 1, client_end)
+                           if client_end is not None else seg_start + SEGMENT_SIZE - 1)
+                attempt = 0
+                ok = False
+                while attempt < MAX_RETRY_PER_SEG and not ok:
+                    attempt += 1
+                    headers_req = {"Range": f"bytes={seg_start}-{seg_end}"}
+                    try:
+                        async with httpx.AsyncClient(timeout=timeout, auth=auth, follow_redirects=True) as cseg:
+                            req = cseg.build_request("GET", url, headers=headers_req)
+                            rseg = await cseg.send(req, stream=True)
+                            if rseg.status_code in (200, 206):
+                                async for chunk in rseg.aiter_bytes():
+                                    if chunk:
+                                        first_byte_sent = True
+                                        yield chunk
+                                await rseg.aclose()
+                                ok = True
+                            elif rseg.status_code == 404:
+                                await rseg.aclose()
+                                if not first_byte_sent:
+                                    raise HTTPException(404, detail="File not found")
+                                return
+                            else:
+                                await rseg.aclose()
+                                logger.warning("Segment unexpected status %s %s-%s %s", rel, seg_start, seg_end, rseg.status_code)
+                        if not ok:
+                            continue
+                    except (httpx.ReadError, httpx.HTTPError, httpx.StreamError) as e:
+                        if not first_byte_sent and attempt >= FIRST_BYTE_MAX_RETRY:
+                            raise HTTPException(502, detail=f"Upstream error before first byte err={e}")
+                        logger.warning("Segment error %s %s-%s attempt=%d err=%s", rel, seg_start, seg_end, attempt, e)
+                    except Exception as e:
+                        if not first_byte_sent:
+                            raise
+                        logger.error("Segment unexpected %s %s-%s attempt=%d err=%s", rel, seg_start, seg_end, attempt, e)
+                if not ok:
+                    logger.error("Abort streaming %s at %s-%s", rel, seg_start, seg_end)
+                    break
+                current = seg_end + 1
+                if client_end is None:
+                    continue
+                if current > client_end:
+                    break
+
+        return StreamingResponse(segmented_body(), status_code=status_code, headers=resp_headers, media_type=content_type)
+
+    async def stat_file(self, root: str, rel: str):
+        url = self._build_url(rel)
+        async with self._client() as client:
+            # PROPFIND 获取属性
+            body = """<?xml version="1.0" encoding="utf-8" ?>
+<d:propfind xmlns:d="DAV:">
+  <d:prop>
+    <d:getcontentlength />
+    <d:getlastmodified />
+    <d:resourcetype />
+  </d:prop>
+</d:propfind>"""
+            resp = await client.request("PROPFIND", url, data=body, headers={"Depth": "0"})
+            if resp.status_code == 404:
+                raise FileNotFoundError(rel)
+            resp.raise_for_status()
+            root_el = ET.fromstring(resp.text)
+            info = {
+                "name": rel.split("/")[-1],
+                "is_dir": False,
+                "size": None,
+                "mtime": None,
+                "type": "file",
+                "path": url,
+            }
+            for resp_el in root_el.findall("d:response", NS):
+                propstat = resp_el.find("d:propstat", NS)
+                if propstat is None:
+                    continue
+                prop = propstat.find("d:prop", NS)
+                if prop is None:
+                    continue
+                size_el = prop.find("d:getcontentlength", NS)
+                lm_el = prop.find("d:getlastmodified", NS)
+                rt_el = prop.find("d:resourcetype", NS)
+                is_dir = rt_el.find("d:collection", NS) is not None if rt_el is not None else False
+                info["is_dir"] = is_dir
+                info["type"] = "dir" if is_dir else "file"
+                if size_el is not None and size_el.text and size_el.text.isdigit():
+                    info["size"] = int(size_el.text)
+                elif info["size"] is None:
+                    info["size"] = 0
+                if lm_el is not None and lm_el.text:
+                    from email.utils import parsedate_to_datetime
+                    try:
+                        info["mtime"] = int(parsedate_to_datetime(lm_el.text).timestamp())
+                    except Exception:
+                        info["mtime"] = 0
+                elif info["mtime"] is None:
+                    info["mtime"] = 0
+            # exif信息
+            exif = None
+            if not info["is_dir"]:
+                mime, _ = mimetypes.guess_type(info["name"])
+                if mime and mime.startswith("image/"):
+                    try:
+                        resp_img = await client.get(url)
+                        if resp_img.status_code == 200:
+                            from PIL import Image
+                            from io import BytesIO
+                            img = Image.open(BytesIO(resp_img.content))
+                            exif_data = img._getexif()
+                            if exif_data:
+                                exif = {str(k): str(v) for k, v in exif_data.items()}
+                    except Exception:
+                        exif = None
+            info["exif"] = exif
+            return info
+
+    async def exists(self, root: str, rel: str) -> bool:
+        url = self._build_url(rel)
+        async with self._client() as client:
+            try:
+                r = await client.head(url)
+                return r.status_code in (200, 204)
+            except Exception:
+                return False
+
+    async def write_file_stream(self, root: str, rel: str, data_iter: AsyncIterator[bytes]):
+        url = self._build_url(rel)
+        async def agen():
+            async for chunk in data_iter:
+                if chunk:
+                    yield chunk
+        async with self._client() as client:
+            resp = await client.put(url, content=agen())
+            resp.raise_for_status()
+        return True
+
+    async def copy(self, root: str, src_rel: str, dst_rel: str, overwrite: bool = False):
+        src_url = self._build_url(src_rel)
+        dst_url = self._build_url(dst_rel)
+        headers = {
+            "Destination": dst_url,
+            "Overwrite": "T" if overwrite else "F"
+        }
+        async with self._client() as client:
+            resp = await client.request("COPY", src_url, headers=headers)
+            if resp.status_code == 412: 
+                raise FileExistsError(dst_rel)
+            if resp.status_code == 404:
+                raise FileNotFoundError(src_rel)
+            resp.raise_for_status()
+
+ADAPTER_TYPE = "webdav"
+CONFIG_SCHEMA = [
+    {"key": "base_url", "label": "基础地址", "type": "string",
+        "required": True, "placeholder": "https://example.com/dav/"},
+    {"key": "username", "label": "用户名", "type": "string", "required": False},
+    {"key": "password", "label": "密码", "type": "password", "required": False},
+    {"key": "timeout",
+        "label": "超时(秒)", "type": "number", "required": False, "default": 15},
+]
+def ADAPTER_FACTORY(rec): return WebDAVAdapter(rec)