17 lines
530 B
Python
17 lines
530 B
Python
import asyncio
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SIZE_LEN_BYTES = 4
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# TODO unify w/ https://github.com/libp2p/py-libp2p/blob/1aed52856f56a4b791696bbcbac31b5f9c2e88c9/libp2p/utils.py#L85-L99 # noqa: E501
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def encode(msg_bytes: bytes) -> bytes:
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len_prefix = len(msg_bytes).to_bytes(SIZE_LEN_BYTES, "big")
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return len_prefix + msg_bytes
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async def read_next_message(reader: asyncio.StreamReader) -> bytes:
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len_bytes = await reader.readexactly(SIZE_LEN_BYTES)
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len_int = int.from_bytes(len_bytes, "big")
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return await reader.readexactly(len_int)
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