6c7d3f1272
- DAO 增加 get_by_sha256
- UploadService 抽出 _to_response 复用；新增 find_by_sha256、register_sftp
- 控制器新增两条路由（注意排在 /{file_id} 之前以避免被吞）
- 引入 SftpRegisterRequest schema
- SFTP 服务启动时自动创建 uploads/incoming/
- 行为：路径穿越 400、文件不存在 404、sha256 已存在则去重返回已有行
114 lines
3.7 KiB
Python
114 lines
3.7 KiB
Python
"""文件上传 / 列表 / 下载接口。"""
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from __future__ import annotations
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from pathlib import Path
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from fastapi import APIRouter, Depends, File, HTTPException, UploadFile
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from fastapi.responses import FileResponse
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from sqlalchemy.orm import Session
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from ..database import get_db
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from ..dao.uploaded_file_dao import UploadedFileDAO
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from ..schemas.file import (
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FileListResponse,
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FileUploadResponse,
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SftpRegisterRequest,
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UploadedFileOut,
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)
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from ..services.upload_service import UploadService
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router = APIRouter(prefix="/api/files", tags=["files"])
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def _service(db: Session = Depends(get_db)) -> UploadService:
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return UploadService(UploadedFileDAO(db))
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@router.post(
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"/upload",
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response_model=FileUploadResponse,
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summary="上传单个文件（流式，支持大文件）",
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description=(
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"multipart/form-data 上传，按 1 MiB 分片流式落盘，内存占用恒定；"
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"落盘过程中计算 SHA-256 并入库。\n\n"
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"极大或极慢的传输建议改用 SFTP（详见 README），HTTP 链路受 Apache 代理 300s 超时限制。"
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),
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)
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async def upload_file(
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file: UploadFile = File(..., description="要上传的文件"),
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service: UploadService = Depends(_service),
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) -> FileUploadResponse:
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if not file.filename:
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raise HTTPException(400, "请求缺少 'file' 字段")
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return service.stream_to_disk(file, source="http", uploaded_by="anonymous")
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@router.get("", response_model=FileListResponse, summary="列出已上传的文件")
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def list_files(
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limit: int = 100,
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offset: int = 0,
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service: UploadService = Depends(_service),
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) -> FileListResponse:
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total, items = service.list_files(limit=limit, offset=offset)
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return FileListResponse(total=total, items=items)
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@router.get(
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"/exists",
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response_model=UploadedFileOut,
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summary="按 sha256 查询是否已上传",
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description="命中返回 200 + 元数据；未命中返回 404。供客户端在上传前去重。",
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)
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def file_exists(
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sha256: str,
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service: UploadService = Depends(_service),
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) -> UploadedFileOut:
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out = service.find_by_sha256(sha256)
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if out is None:
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raise HTTPException(404, "未找到匹配的 sha256")
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return out
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@router.post(
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"/register-sftp",
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response_model=FileUploadResponse,
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summary="登记一个已通过 SFTP 落盘的文件",
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description=(
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"客户端先把文件 SFTP 到 ``incoming/<name>``，再用本接口登记入库。"
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"服务端会计算 sha256（已存在则去重）、把文件原子改名到 ``YYYY/MM/<uuid>.<ext>``、写 DB 行。"
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),
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)
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def register_sftp(
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body: SftpRegisterRequest,
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service: UploadService = Depends(_service),
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) -> FileUploadResponse:
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return service.register_sftp(
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filename=body.filename,
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original_filename=body.original_filename,
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uploaded_by=body.uploaded_by,
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)
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@router.get("/{file_id}", response_model=UploadedFileOut, summary="查询单个文件元数据")
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def get_file(file_id: int, service: UploadService = Depends(_service)) -> UploadedFileOut:
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out = service.get_out(file_id)
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if out is None:
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raise HTTPException(404, "文件不存在")
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return out
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@router.get("/{file_id}/download", summary="下载文件")
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def download_file(file_id: int, service: UploadService = Depends(_service)) -> FileResponse:
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out = service.get_out(file_id)
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if out is None:
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raise HTTPException(404, "文件不存在")
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path: Path | None = service.resolve_disk_path(file_id)
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if path is None or not path.exists():
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raise HTTPException(410, "文件实体已不在磁盘上")
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return FileResponse(
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path=str(path),
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media_type=out.content_type or "application/octet-stream",
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filename=out.original_filename,
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)
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