Created
August 25, 2024 20:46
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Fastapi File Streaming Response (HTML Video etc.)
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| import mimetypes | |
| from pathlib import Path | |
| import fastapi | |
| import aiofiles | |
| router = fastapi.APIRouter() | |
| @router.get('{path:path}') | |
| async def streaming_endpoint(path: str, range: str = fastapi.Header()): | |
| chunk_size = 2 ** 20 # 1 MB | |
| disk_path = Path(path) | |
| if not disk_path.exists(): | |
| raise fastapi.HTTPException(404, "not found") | |
| filesize = disk_path.stat().st_size | |
| typ, *ext = mimetypes.guess_type(disk_path.as_uri()) | |
| if not typ: | |
| typ = "application/octet-stream" | |
| media_type = typ | |
| start, end = range.split('=')[-1].split('-') | |
| start = int(start) | |
| end = ( | |
| int(end) | |
| if end | |
| else (start + chunk_size - 1) | |
| ) | |
| size = end - start | |
| async with aiofiles.open(disk_path, mode='rb') as fh: | |
| await fh.seek(start) | |
| data = await fh.read(size + 1) | |
| headers = { | |
| 'Content-Range': f'bytes {start}-{end}/{filesize}', | |
| 'Accept-Ranges': 'bytes' | |
| } | |
| return fastapi.responses.Response(data, status_code=206, headers=headers, media_type=media_type) |
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