95 lines
2.8 KiB
Python
95 lines
2.8 KiB
Python
"""Lightweight development backend for UI work.
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This avoids importing heavy ML dependencies so the UI can run during frontend
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development without installing large Python packages (torch/whisperx/etc.).
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Use this when you only need the health/file streaming endpoints.
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"""
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from fastapi import FastAPI, Request, HTTPException
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from fastapi.middleware.cors import CORSMiddleware
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from fastapi.responses import StreamingResponse
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from pathlib import Path
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app = FastAPI(title="TalkEdit Dev Backend", version="0.0.1")
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["*"],
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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expose_headers=["Content-Range", "Accept-Ranges", "Content-Length"],
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)
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MIME_MAP = {
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".mp4": "video/mp4",
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".mkv": "video/x-matroska",
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".mov": "video/quicktime",
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".avi": "video/x-msvideo",
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".webm": "video/webm",
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".m4a": "audio/mp4",
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".wav": "audio/wav",
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".mp3": "audio/mpeg",
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".flac": "audio/flac",
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}
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@app.get("/health")
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async def health():
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return {"status": "ok"}
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@app.get("/file")
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async def serve_local_file(request: Request, path: str):
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file_path = Path(path)
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if not file_path.is_file():
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raise HTTPException(status_code=404, detail=f"File not found: {path}")
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file_size = file_path.stat().st_size
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content_type = MIME_MAP.get(file_path.suffix.lower(), "application/octet-stream")
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range_header = request.headers.get("range")
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if range_header:
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range_spec = range_header.replace("bytes=", "")
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start_str, end_str = range_spec.split("-")
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start = int(start_str) if start_str else 0
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end = int(end_str) if end_str else file_size - 1
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end = min(end, file_size - 1)
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content_length = end - start + 1
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def iter_range():
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with open(file_path, "rb") as f:
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f.seek(start)
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remaining = content_length
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while remaining > 0:
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chunk = f.read(min(65536, remaining))
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if not chunk:
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break
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remaining -= len(chunk)
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yield chunk
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return StreamingResponse(
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iter_range(),
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status_code=206,
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media_type=content_type,
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headers={
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"Content-Range": f"bytes {start}-{end}/{file_size}",
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"Accept-Ranges": "bytes",
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"Content-Length": str(content_length),
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},
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)
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def iter_file():
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with open(file_path, "rb") as f:
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while chunk := f.read(65536):
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yield chunk
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return StreamingResponse(
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iter_file(),
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media_type=content_type,
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headers={
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"Accept-Ranges": "bytes",
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"Content-Length": str(file_size),
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},
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)
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