89 lines
3.0 KiB
Python
89 lines
3.0 KiB
Python
from fastapi import APIRouter, HTTPException
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from pydantic import BaseModel
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from fastapi.responses import FileResponse
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import os
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from pathlib import Path
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import uuid
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from typing import List
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import asyncio
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# moviepy is imported lazily inside the conversion function to avoid
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# failing module import at application startup when the package is missing.
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router = APIRouter(prefix="/convert", tags=["convert"])
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@router.get("/list-audio", response_model=List[str])
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async def list_audio_files():
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base_dir = Path(__file__).resolve().parent.parent.parent / "data" / "audio"
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if not base_dir.exists():
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return []
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files = [f.name for f in base_dir.iterdir() if f.is_file()]
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return files
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class DownloadAudioRequest(BaseModel):
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filename: str
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@router.post("/download-audio")
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async def download_audio_file(data: DownloadAudioRequest):
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base_dir = Path(__file__).resolve().parent.parent.parent / "data" / "audio"
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src = (base_dir / data.filename).resolve()
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try:
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src.relative_to(base_dir.parent)
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except Exception:
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raise HTTPException(status_code=400, detail="Invalid filename")
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if not src.exists():
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raise HTTPException(status_code=404, detail="File not found")
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return FileResponse(str(src), filename=src.name, media_type="audio/mpeg")
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# New: convert a video file (located in ./data) to mp3 using bundled imageio-ffmpeg
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class VideoToMp3Request(BaseModel):
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filename: str
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def _run_moviepy(src: Path, dest: Path):
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from moviepy import VideoFileClip
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clip = VideoFileClip(str(src))
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try:
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if clip.audio is None:
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raise RuntimeError("Source file has no audio stream")
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clip.audio.write_audiofile(str(dest), codec="libmp3lame", bitrate="192k")
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finally:
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clip.close()
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@router.post("/video-to-mp3")
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async def video_to_mp3(req: VideoToMp3Request):
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# ensure MoviePy is available before doing work, return clear 503 if not
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try:
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import moviepy # noqa: F401
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except Exception:
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raise HTTPException(status_code=503, detail="moviepy is not installed in the runtime. Rebuild image or install moviepy/imageio-ffmpeg")
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data_dir = Path(__file__).resolve().parent.parent.parent / "data"
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src = (data_dir / req.filename).resolve()
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try:
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src.relative_to(data_dir)
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except Exception:
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raise HTTPException(status_code=400, detail="Invalid filename")
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if not src.exists() or not src.is_file():
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raise HTTPException(status_code=404, detail="Source file not found")
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out_dir = data_dir / "audio"
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out_dir.mkdir(parents=True, exist_ok=True)
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dest = out_dir / f"{src.stem}.mp3"
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try:
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# run blocking MoviePy conversion in threadpool to avoid blocking event loop
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await asyncio.get_running_loop().run_in_executor(None, _run_moviepy, src, dest)
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except Exception as e:
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raise HTTPException(status_code=500, detail=f"conversion failed: {e}")
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return FileResponse(str(dest), filename=dest.name, media_type="audio/mpeg")
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# Note: this endpoint uses the bundled ffmpeg provided by `imageio-ffmpeg`.
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