ilia
480e5b6ce6
Read-only demo boards, per-IP rate limits, opaque voter sessions, session leave, upload sniffing, path containment, and retire /v1.
33 lines
984 B
Python
33 lines
984 B
Python
"""Audio upload sniffing helpers."""
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from __future__ import annotations
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def sniff_audio(data: bytes) -> str | None:
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"""Return a normalized content-type if magic bytes match a known container."""
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if len(data) < 12:
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return None
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if data[:4] == b"\x1a\x45\xdf\xa3":
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return "audio/webm"
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if data[:4] == b"OggS":
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return "audio/ogg"
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if data[:4] == b"RIFF" and data[8:12] == b"WAVE":
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return "audio/wav"
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if data[:3] == b"ID3" or (data[0] == 0xFF and (data[1] & 0xE0) == 0xE0):
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return "audio/mpeg"
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if data[4:8] == b"ftyp":
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return "audio/mp4"
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return None
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def ext_for_content_type(content_type: str) -> str:
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if "ogg" in content_type:
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return "ogg"
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if "mp4" in content_type or "m4a" in content_type or "aac" in content_type:
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return "m4a"
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if "mpeg" in content_type or content_type == "audio/mp3":
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return "mp3"
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if "wav" in content_type:
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return "wav"
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return "webm"
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