75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
import abc
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import asyncio
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import struct
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class __InternalProtocol(asyncio.Protocol):
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__reader:asyncio.StreamReader
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def __init__(self, reader:asyncio.StreamReader):
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assert isinstance(reader, asyncio.StreamReader)
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self.__reader = reader
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async def _drain_helper(self):
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pass
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class __InternalTransport(asyncio.WriteTransport):
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__close: bool
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__reader: asyncio.StreamReader
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def __init__(self, reader: asyncio.StreamReader):
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self.__close = True
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assert isinstance(reader, asyncio.StreamReader)
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self.__reader = reader
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def close(self):
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self.__close = False
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self.__reader.feed_eof()
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def is_closing(self):
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return not self.__close
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def write(self, data: bytes):
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self.__reader.feed_data(data)
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def create_internal_stream(loop=None):
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if loop is None:
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loop = asyncio.get_event_loop()
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reader = asyncio.StreamReader(loop=None)
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internal_protocol = __InternalProtocol(reader)
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internal_transport = __InternalTransport(reader)
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writer = asyncio.StreamWriter(internal_transport, internal_protocol, reader=reader, loop=loop)
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return reader, writer
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class BaseConnectionServer(abc.ABC):
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__in:asyncio.StreamReader
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__out:asyncio.StreamWriter
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__size_format = struct.Struct("!I")
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def __init__(self, in_io:asyncio.StreamReader, out_io:asyncio.StreamWriter):
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if not isinstance(in_io, asyncio.StreamReader):
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raise TypeError("in_io have to be a stream reader.")
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if not isinstance(out_io, asyncio.StreamWriter):
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raise TypeError("out_io have to be a stream writer.")
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self.__in, self.__out = in_io, out_io
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async def init(self):
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# Send own config
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self.__out.write(self.__size_format.pack(0))
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await self.__out.drain()
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# Read other config
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size = self.__size_format.unpack(await self.__in.readexactly(self.__size_format.size))[0]
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await self.__in.readexactly(size)
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# Send applied config
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self.__out.write(self.__size_format.pack(0))
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await self.__out.drain()
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# Read other applied config
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size = self.__size_format.unpack(await self.__in.readexactly(self.__size_format.size))[0]
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await self.__in.readexactly(size)
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