77 lines
2.6 KiB
Python
77 lines
2.6 KiB
Python
import asyncio
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from typing import TYPE_CHECKING, Any, Awaitable, List, Set, Tuple
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from libp2p.network.connection.net_connection_interface import INetConn
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from libp2p.network.stream.net_stream import NetStream
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from libp2p.stream_muxer.abc import IMuxedConn, IMuxedStream
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if TYPE_CHECKING:
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from libp2p.network.swarm import Swarm # noqa: F401
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"""
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Reference: https://github.com/libp2p/go-libp2p-swarm/blob/04c86bbdafd390651cb2ee14e334f7caeedad722/swarm_conn.go # noqa: E501
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"""
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class SwarmConn(INetConn):
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conn: IMuxedConn
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swarm: "Swarm"
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streams: Set[NetStream]
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event_closed: asyncio.Event
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_tasks: List["asyncio.Future[Any]"]
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def __init__(self, conn: IMuxedConn, swarm: "Swarm") -> None:
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self.conn = conn
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self.swarm = swarm
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self.streams = set()
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self.event_closed = asyncio.Event()
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self._tasks = []
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async def close(self) -> None:
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if self.event_closed.is_set():
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return
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self.event_closed.set()
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await self.conn.close()
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for task in self._tasks:
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task.cancel()
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# TODO: Reset streams for local.
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# TODO: Notify closed.
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async def _handle_new_streams(self) -> None:
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# TODO: Break the loop when anything wrong in the connection.
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while True:
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print("!@# SwarmConn._handle_new_streams")
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stream = await self.conn.accept_stream()
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print("!@# SwarmConn._handle_new_streams: accept_stream:", stream)
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net_stream = await self._add_stream(stream)
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print("!@# SwarmConn.calling common_stream_handler")
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if self.swarm.common_stream_handler is not None:
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await self.run_task(self.swarm.common_stream_handler(net_stream))
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await self.close()
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async def _add_stream(self, muxed_stream: IMuxedStream) -> NetStream:
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print("!@# SwarmConn._add_stream:", muxed_stream)
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net_stream = NetStream(muxed_stream)
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# Call notifiers since event occurred
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for notifee in self.swarm.notifees:
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await notifee.opened_stream(self.swarm, net_stream)
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return net_stream
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async def start(self) -> None:
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print("!@# SwarmConn.start")
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await self.run_task(self._handle_new_streams())
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async def run_task(self, coro: Awaitable[Any]) -> None:
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self._tasks.append(asyncio.ensure_future(coro))
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async def new_stream(self) -> NetStream:
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muxed_stream = await self.conn.open_stream()
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return await self._add_stream(muxed_stream)
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async def get_streams(self) -> Tuple[NetStream, ...]:
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return tuple(self.streams)
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