41580a9025
- 后端： - UploadService.delete_file 下沉删除逻辑（DB 行 + 磁盘文件），单删/批删复用。 - POST /api/admin/files/batch-delete：批量硬删除，返回 deleted 数与 not_found 列表。 - list 接口加 Query 约束（limit 1-10000、offset>=0），非法返回 422。 - 前端（file_browser）： - 复选框列 + 全选/反选，选中行高亮，批量操作栏（已选计数/下载/删除/取消）。 - 分页控件：每页 20/50/100/全部 切换，页码导航（首页/末页/当前±1/省略号）。 - 批量下载逐个触发（间隔 150ms 防浏览器拦截）；批量删除走 batch-delete 接口。 - 删除后重载当前页，当前页空则回退一页。
193 lines
7.4 KiB
Python
193 lines
7.4 KiB
Python
"""上传服务：流式落盘 + 原子改名 + 元数据入库 + sha256 去重。
|
||
|
||
两条上传路径（HTTP 整文件 / 分片拼接）共享本类的「存储路径生成 + 落库提交 +
|
||
sha256 去重」逻辑，避免重复实现。SFTP 服务器仅作为文件暂存通道（chroot 到
|
||
upload_root），不再有 HTTP 登记接口。
|
||
"""
|
||
|
||
from __future__ import annotations
|
||
|
||
import hashlib
|
||
import os
|
||
import uuid
|
||
from collections.abc import Iterator
|
||
from datetime import datetime, timezone
|
||
from pathlib import Path
|
||
|
||
from fastapi import UploadFile
|
||
|
||
from ..config import get_settings
|
||
from ..dao.uploaded_file_dao import UploadedFileDAO
|
||
from ..models.uploaded_file import UploadedFile
|
||
from ..schemas.file import FileUploadResponse, UploadedFileOut
|
||
|
||
|
||
def hash_stream(chunks: Iterator[bytes]) -> tuple[int, str]:
|
||
"""对一段字节块序列流式计算 (size, sha256)。供多条上传路径复用。"""
|
||
h = hashlib.sha256()
|
||
size = 0
|
||
for chunk in chunks:
|
||
size += len(chunk)
|
||
h.update(chunk)
|
||
return size, h.hexdigest()
|
||
|
||
|
||
class UploadService:
|
||
def __init__(self, dao: UploadedFileDAO) -> None:
|
||
s = get_settings()
|
||
self.dao = dao
|
||
self.upload_root = s.resolved_upload_dir()
|
||
self.chunk_bytes = s.storage.chunk_bytes
|
||
self.hash_on_upload = s.storage.sha256_on_upload
|
||
|
||
# ---------------- 写入 ----------------
|
||
|
||
def stream_to_disk(
|
||
self, file: UploadFile, source: str, uploaded_by: str,
|
||
) -> FileUploadResponse:
|
||
"""HTTP 流式上传：先写 ``<final>.part``，DB 行提交后再 ``os.replace`` 成正式名。
|
||
|
||
失败仅会留下可识别的 ``.part`` 文件，由 start.sh 启动时统一清理。
|
||
"""
|
||
rel_path, abs_path = self.make_storage_path(file.filename or "")
|
||
part_path = abs_path.with_name(abs_path.name + ".part")
|
||
size, digest = self._write_part(file, part_path)
|
||
|
||
entity = UploadedFile(
|
||
storage_path=str(rel_path),
|
||
original_filename=os.path.basename(file.filename or rel_path.name),
|
||
content_type=file.content_type or "",
|
||
size_bytes=size,
|
||
sha256=digest,
|
||
source=source,
|
||
uploaded_by=uploaded_by,
|
||
)
|
||
return self.commit_entity(entity, part_path, abs_path)
|
||
|
||
# ---------------- 查询 ----------------
|
||
|
||
def list_files(self, limit: int = 100, offset: int = 0) -> tuple[int, list[UploadedFileOut]]:
|
||
total = self.dao.count()
|
||
rows = self.dao.list(limit=limit, offset=offset)
|
||
items = [UploadedFileOut.model_validate(r) for r in rows]
|
||
return total, items
|
||
|
||
def get_out(self, file_id: int) -> UploadedFileOut | None:
|
||
row = self.dao.get_by_id(file_id)
|
||
return UploadedFileOut.model_validate(row) if row else None
|
||
|
||
def find_by_sha256(self, sha256: str) -> UploadedFileOut | None:
|
||
row = self.dao.get_by_sha256(sha256)
|
||
return UploadedFileOut.model_validate(row) if row else None
|
||
|
||
def get_out_with_disk_path(self, file_id: int) -> tuple[UploadedFileOut | None, Path | None]:
|
||
"""合并查询：一次 DB 读取同时返回 (元数据, 磁盘绝对路径)。
|
||
|
||
供下载/删除路径复用，避免原先 get_out + resolve_disk_path 各查一次的重复读。
|
||
"""
|
||
row = self.dao.get_by_id(file_id)
|
||
if row is None:
|
||
return None, None
|
||
out = UploadedFileOut.model_validate(row)
|
||
path = (self.upload_root / row.storage_path).resolve()
|
||
return out, path
|
||
|
||
def delete_file(self, file_id: int) -> bool:
|
||
"""硬删除：删磁盘文件 + 删 DB 行。磁盘缺失不阻断 DB 清理。返回是否命中。
|
||
|
||
供单删/批删复用，保证删除语义一致。
|
||
"""
|
||
_, path = self.get_out_with_disk_path(file_id)
|
||
row = self.dao.get_by_id(file_id)
|
||
if row is None:
|
||
return False
|
||
if path is not None:
|
||
try:
|
||
Path(path).unlink(missing_ok=True)
|
||
except Exception:
|
||
# 即使磁盘删除失败也继续清 DB 行，保证列表不再显示
|
||
pass
|
||
self.dao.delete(file_id)
|
||
return True
|
||
|
||
# ---------------- 共享 helper（供本类与 ChunkUploadService 复用） ----------------
|
||
|
||
@staticmethod
|
||
def _safe_ext(filename: str) -> str:
|
||
return os.path.splitext(os.path.basename(filename))[1]
|
||
|
||
@staticmethod
|
||
def to_response(row: UploadedFile, *, deduplicated: bool = False) -> FileUploadResponse:
|
||
return FileUploadResponse(
|
||
id=row.id,
|
||
filename=row.original_filename,
|
||
size_bytes=row.size_bytes,
|
||
sha256=row.sha256,
|
||
storage_path=row.storage_path,
|
||
uploaded_at=row.uploaded_at,
|
||
deduplicated=deduplicated,
|
||
)
|
||
|
||
def make_storage_path(self, original_filename: str) -> tuple[Path, Path]:
|
||
"""生成 ``(rel_path, abs_path)``；abs_path 的父目录已创建。"""
|
||
now = datetime.now(timezone.utc)
|
||
rel_dir = Path(f"{now:%Y}/{now:%m}")
|
||
(self.upload_root / rel_dir).mkdir(parents=True, exist_ok=True)
|
||
rel_path = rel_dir / f"{uuid.uuid4().hex}{self._safe_ext(original_filename)}"
|
||
return rel_path, self.upload_root / rel_path
|
||
|
||
def commit_entity(
|
||
self, entity: UploadedFile, src_path: Path, dest_path: Path,
|
||
) -> FileUploadResponse:
|
||
"""落 DB 行后把 src_path 原子改名到 dest_path；任一失败回滚已生成的副作用。"""
|
||
try:
|
||
saved = self.dao.create(entity)
|
||
except Exception:
|
||
src_path.unlink(missing_ok=True)
|
||
raise
|
||
try:
|
||
os.replace(src_path, dest_path)
|
||
except Exception:
|
||
try:
|
||
self.dao.delete(saved.id)
|
||
finally:
|
||
src_path.unlink(missing_ok=True)
|
||
raise
|
||
return self.to_response(saved)
|
||
|
||
def dedup_or_commit(
|
||
self, entity: UploadedFile, src_path: Path,
|
||
) -> FileUploadResponse:
|
||
"""公共尾部：按 entity.sha256 去重，命中则删 src 返回旧行；否则 commit。
|
||
|
||
供分片拼接等「先算出 sha256 再决定落盘」的路径复用，与 stream_to_disk
|
||
（边写边算、无独立 src）的区别在于这里 sha256 已在 entity 上。
|
||
"""
|
||
existing = self.dao.get_by_sha256(entity.sha256)
|
||
if existing is not None:
|
||
src_path.unlink(missing_ok=True)
|
||
return self.to_response(existing, deduplicated=True)
|
||
rel_path, abs_path = self.make_storage_path(entity.original_filename)
|
||
entity.storage_path = str(rel_path)
|
||
return self.commit_entity(entity, src_path, abs_path)
|
||
|
||
# ---------------- 内部 ----------------
|
||
|
||
def _write_part(self, file: UploadFile, part_path: Path) -> tuple[int, str]:
|
||
"""把上传流写到 part_path 并 fsync；返回 (size, sha256)。失败时清理残品。"""
|
||
hasher = hashlib.sha256() if self.hash_on_upload else None
|
||
size = 0
|
||
try:
|
||
with part_path.open("wb") as out:
|
||
while chunk := file.file.read(self.chunk_bytes):
|
||
out.write(chunk)
|
||
size += len(chunk)
|
||
if hasher is not None:
|
||
hasher.update(chunk)
|
||
out.flush()
|
||
os.fsync(out.fileno())
|
||
except Exception:
|
||
part_path.unlink(missing_ok=True)
|
||
raise
|
||
return size, (hasher.hexdigest() if hasher is not None else "")
|