61 lines
2.3 KiB
Python
61 lines
2.3 KiB
Python
"""B03 파일 입력 저장 엔진."""
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import os
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import tempfile
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from pathlib import Path
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from fastapi import UploadFile
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from B03_FileInput.B03_FileInput_Schema import FileUploadDescriptor
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from common_util.common_util_storage import get_project_stage_path
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from config.config_system import UPLOAD_CHUNK_SIZE_BYTES, UPLOAD_MAX_MB
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def resolve_upload_destination(
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project_root: str | Path,
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descriptor: FileUploadDescriptor,
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) -> Path:
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"""검증된 파일의 B03 입력 저장 경로를 생성해 반환한다."""
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stage_root = Path(get_project_stage_path(str(project_root), "B03_FileInput")).resolve()
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file_type = Path(descriptor.original_filename).suffix.lower().lstrip(".")
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destination = (stage_root / "input" / file_type / descriptor.original_filename).resolve()
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if os.path.commonpath((stage_root, destination)) != str(stage_root):
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raise ValueError("업로드 저장 경로가 B03 단계 폴더를 벗어났습니다.")
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destination.parent.mkdir(parents=True, exist_ok=True)
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return destination
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async def save_upload_stream(upload: UploadFile, destination: Path) -> int:
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"""업로드 스트림을 크기 제한 내에서 임시 파일에 기록한 뒤 교체한다."""
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maximum_bytes = UPLOAD_MAX_MB * 1024 * 1024
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written_bytes = 0
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temporary_path: Path | None = None
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try:
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with tempfile.NamedTemporaryFile(
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mode="wb",
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dir=destination.parent,
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prefix=f".{destination.name}.",
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suffix=".upload",
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delete=False,
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) as temporary:
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temporary_path = Path(temporary.name)
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while chunk := await upload.read(UPLOAD_CHUNK_SIZE_BYTES):
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written_bytes += len(chunk)
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if written_bytes > maximum_bytes:
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raise ValueError(f"파일 크기는 {UPLOAD_MAX_MB}MB를 초과할 수 없습니다.")
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temporary.write(chunk)
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temporary.flush()
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os.fsync(temporary.fileno())
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if written_bytes == 0:
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raise ValueError("빈 파일은 업로드할 수 없습니다.")
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os.replace(temporary_path, destination)
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temporary_path = None
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return written_bytes
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finally:
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if temporary_path is not None:
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temporary_path.unlink(missing_ok=True)
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