Initial release

backend/app/download.py

@@ -0,0 +1,26 @@
+from fastapi import APIRouter, HTTPException, Depends
+from fastapi.responses import StreamingResponse
+
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.future import select
+
+from app.db import Publication, get_db
+
+import io
+
+router = APIRouter()
+
+@router.get("/download/{publication_id}")
+async def download_publication(publication_id: int, db: AsyncSession = Depends(get_db)):
+    result = await db.execute(select(Publication).where(Publication.id == publication_id))
+    publication = result.scalar_one_or_none()
+    if not publication:
+        raise HTTPException(status_code=404, detail="Publication not found")
+    file_bytes = publication.file
+    filename = publication.filename or "document.pdf"
+
+    return StreamingResponse(
+        io.BytesIO(file_bytes),
+        media_type="application/pdf",
+        headers={"Content-Disposition": f"attachment; filename={filename}"}
+    )