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61 lines
2.0 KiB
Python
61 lines
2.0 KiB
Python
# Copyright 2021-2022 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# -----------------------------------------------------------------------------
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# Imports
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# -----------------------------------------------------------------------------
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import asyncio
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import io
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import logging
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from .common import Transport, StreamPacketSource, StreamPacketSink
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# -----------------------------------------------------------------------------
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# Logging
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# -----------------------------------------------------------------------------
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logger = logging.getLogger(__name__)
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# -----------------------------------------------------------------------------
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async def open_file_transport(spec):
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'''
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Open a File transport (typically not for a real file, but for a PTY or other unix virtual files).
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The parameter string is the path of the file to open
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'''
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# Open the file
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file = io.open(spec, 'r+b', buffering=0)
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# Setup reading
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read_transport, packet_source = await asyncio.get_running_loop().connect_read_pipe(
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lambda: StreamPacketSource(),
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file
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)
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# Setup writing
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write_transport, _ = await asyncio.get_running_loop().connect_write_pipe(
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lambda: asyncio.BaseProtocol(),
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file
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)
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packet_sink = StreamPacketSink(write_transport)
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class FileTransport(Transport):
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async def close(self):
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read_transport.close()
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write_transport.close()
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file.close()
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return FileTransport(packet_source, packet_sink)
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