language-learning-app/api/app/routers/media.py

from fastapi import APIRouter, Depends, HTTPException
from fastapi.responses import Response
from sqlalchemy.ext.asyncio import AsyncSession
from botocore.exceptions import ClientError

from ..outbound.postgres.database import get_db
from ..outbound.postgres.repositories.translated_article_repository import TranslatedArticleRepository
from ..storage import download_audio

router = APIRouter(prefix="/media", tags=["media"])


@router.get("/{filename:path}")
async def get_media_file(
    filename: str,
    db: AsyncSession = Depends(get_db),
) -> Response:
    article = await TranslatedArticleRepository(db).get_by_audio_url(filename)

    if article is None:
        raise HTTPException(status_code=404, detail="File not found")

    try:
        audio_bytes, content_type = download_audio(filename)
    except ClientError as e:
        if e.response["Error"]["Code"] in ("NoSuchKey", "404"):
            raise HTTPException(status_code=404, detail="File not found")
        raise HTTPException(status_code=500, detail="Storage error")

    return Response(content=audio_bytes, media_type=content_type)