mirror of
https://github.com/varun-r-mallya/py-libp2p.git
synced 2025-12-31 20:36:24 +00:00
0b466ddc86
To avoid `self.writer.drain()` is called in parallel. Reference: https://bugs.python.org/issue29930
57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
import asyncio
|
|
|
|
from .raw_connection_interface import IRawConnection
|
|
|
|
|
|
class RawConnection(IRawConnection):
|
|
|
|
conn_ip: str
|
|
conn_port: str
|
|
reader: asyncio.StreamReader
|
|
writer: asyncio.StreamWriter
|
|
initiator: bool
|
|
|
|
_drain_lock: asyncio.Lock
|
|
_next_id: int
|
|
|
|
def __init__(
|
|
self,
|
|
ip: str,
|
|
port: str,
|
|
reader: asyncio.StreamReader,
|
|
writer: asyncio.StreamWriter,
|
|
initiator: bool,
|
|
) -> None:
|
|
self.conn_ip = ip
|
|
self.conn_port = port
|
|
self.reader = reader
|
|
self.writer = writer
|
|
self.initiator = initiator
|
|
|
|
self._drain_lock = asyncio.Lock()
|
|
self._next_id = 0 if initiator else 1
|
|
|
|
async def write(self, data: bytes) -> None:
|
|
self.writer.write(data)
|
|
# Reference: https://github.com/ethereum/lahja/blob/93610b2eb46969ff1797e0748c7ac2595e130aef/lahja/asyncio/endpoint.py#L99-L102 # noqa: E501
|
|
# Use a lock to serialize drain() calls. Circumvents this bug:
|
|
# https://bugs.python.org/issue29930
|
|
async with self._drain_lock:
|
|
await self.writer.drain()
|
|
|
|
async def read(self) -> bytes:
|
|
line = await self.reader.readline()
|
|
return line.rstrip(b"\n")
|
|
|
|
def close(self) -> None:
|
|
self.writer.close()
|
|
|
|
def next_stream_id(self) -> int:
|
|
"""
|
|
Get next available stream id
|
|
:return: next available stream id for the connection
|
|
"""
|
|
next_id = self._next_id
|
|
self._next_id += 2
|
|
return next_id
|