feat: persist uploads under resources

업로드 파일을 resources/uploads에 저장하고 파일명 안전화 처리합니다.
resources 디렉터리는 git에서 제외하고 uploads/.gitkeep만 추적합니다.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/main.py

@@ -6,6 +6,7 @@ import os
 import tempfile
 import threading
 import time
+import re
 from pathlib import Path
 from typing import Any
 from uuid import uuid4
@@ -23,7 +24,9 @@ from .stt import transcribe_file, transcribe_iter
 load_dotenv()
 
 APP_ROOT = Path(__file__).resolve().parent
+PROJECT_ROOT = APP_ROOT.parent
 STATIC_DIR = APP_ROOT / "static"
+UPLOAD_DIR = PROJECT_ROOT / "resources" / "uploads"
 
 ALLOWED_EXTS = {".mp3", ".m4a", ".wav", ".mp4", ".aac", ".ogg", ".flac", ".webm"}
 ALLOWED_MIME_PREFIXES = ("audio/",)
@@ -47,6 +50,7 @@ app.mount("/static", StaticFiles(directory=str(STATIC_DIR)), name="static")
 def _startup() -> None:
     # .env 기반으로 DB 테이블 자동 생성
     db.init_db()
+    UPLOAD_DIR.mkdir(parents=True, exist_ok=True)
 
 
 @dataclasses.dataclass
@@ -128,17 +132,17 @@ async def api_create_job(
 ) -> dict[str, Any]:
     _cleanup_jobs()
     _validate_upload(file)
-    tmp_path = await _save_upload(file)
+    job_id = str(uuid4())
+    saved_path = await _save_upload(file, file_id=job_id)
 
     lang = language.strip().lower()
     if lang in ("", "auto"):
         lang = ""
 
-    job_id = str(uuid4())
     job = _Job(
         job_id=job_id,
         filename=file.filename,
-        tmp_path=tmp_path,
+        tmp_path=saved_path,
         language=(lang or None),
         vad_filter=bool(vad_filter),
         beam_size=int(beam_size),
@@ -188,28 +192,14 @@ async def api_transcribe(
 ) -> dict[str, Any]:
     _validate_upload(file)
 
-    suffix = Path(file.filename or "").suffix.lower() or ".bin"
-    with tempfile.NamedTemporaryFile(prefix="stt_", suffix=suffix, delete=False) as tmp:
-        tmp_path = tmp.name
-        total = 0
-        while True:
-            chunk = await file.read(1024 * 1024)
-            if not chunk:
-                break
-            total += len(chunk)
-            if total > MAX_UPLOAD_BYTES:
-                raise HTTPException(
-                    status_code=413,
-                    detail=f"파일이 너무 큽니다. 최대 {MAX_UPLOAD_MB}MB 까지 업로드 가능합니다.",
-                )
-            tmp.write(chunk)
-
     try:
+        file_id = str(uuid4())
+        saved_path = await _save_upload(file, file_id=file_id)
         lang = language.strip().lower()
         if lang in ("", "auto"):
             lang = ""
         result = transcribe_file(
-            tmp_path,
+            saved_path,
             language=(lang or None),
             vad_filter=bool(vad_filter),
             beam_size=int(beam_size),
@@ -231,10 +221,8 @@ async def api_transcribe(
             pass
         return result
     finally:
-        try:
-            os.remove(tmp_path)
-        except OSError:
-            pass
+        # 업로드 파일은 resources/uploads 아래에 보관 (삭제하지 않음)
+        pass
 
 
 @app.get("/healthz")
@@ -308,10 +296,28 @@ def _validate_upload(file: UploadFile) -> None:
         )
 
 
-async def _save_upload(file: UploadFile) -> str:
-    suffix = Path(file.filename or "").suffix.lower() or ".bin"
-    with tempfile.NamedTemporaryFile(prefix="stt_", suffix=suffix, delete=False) as tmp:
-        tmp_path = tmp.name
+_FILENAME_SAFE_RE = re.compile(r"[^A-Za-z0-9._-]+")
+
+
+def _safe_filename(name: str) -> str:
+    base = Path(name).name  # path traversal 방지
+    base = base.strip().replace(" ", "_")
+    base = _FILENAME_SAFE_RE.sub("_", base)
+    if not base:
+        return "upload.bin"
+    if len(base) > 120:
+        stem = Path(base).stem[:100]
+        suf = Path(base).suffix[:20]
+        base = f"{stem}{suf}"
+    return base
+
+
+async def _save_upload(file: UploadFile, *, file_id: str) -> str:
+    UPLOAD_DIR.mkdir(parents=True, exist_ok=True)
+    safe = _safe_filename(file.filename or "upload.bin")
+    out_path = UPLOAD_DIR / f"{file_id}_{safe}"
+    tmp_path = str(out_path)
+    with open(tmp_path, "wb") as tmp:
         total = 0
         while True:
             chunk = await file.read(1024 * 1024)
@@ -473,9 +479,6 @@ def _run_job(job_id: str) -> None:
         except Exception:
             pass
     finally:
-        if tmp_path:
-            try:
-                os.remove(tmp_path)
-            except OSError:
-                pass
+        # 업로드 파일은 resources/uploads 아래에 보관 (삭제하지 않음)
+        pass