在使用 Asyncio 流时,关闭写入器(writer)可能无法立即停止读取器(reader)的操作。这会导致读取器继续运行,即使写入器已经关闭。为了更好地控制延迟和数据流,可以使用异步 with 语句来确保在关闭写入器后读取器也会被关闭。
以下是一个代码示例:
import asyncio
async def read_data(stream): data = await stream.read(1024) print(f"Read {len(data)} bytes of data") return data
async def main(): # Create a server socket server = await asyncio.start_server(handle_connection, 'localhost', 8888)
# Wait for a connection
async with server:
await server.serve_forever()
async def handle_connection(reader, writer): while True: # Read data from the stream data = await read_data(reader)
# Process the data
print(f"Processing {len(data)} bytes of data")
# If the writer is closed, exit the loop
if writer.is_closing():
break
# Close the stream when finished reading
writer.close()
await writer.wait_closed()
asyncio.run(main())
在上面的代码示例中,使用异步 with 语句确保在关闭写入器后读取器也会被关闭。通过调用writer.wait_closed(),我们等待所有数据都被读取后再关闭读取器。这可以确保没有数据被丢失并且所有读取操作都在关闭读取器前完成。