RuntimeError: 无法对关闭的处理程序执行操作。 Django 和颤振

Posted 2023-02-16

【中文标题】RuntimeError: 无法对关闭的处理程序执行操作。 Django 和颤振

【英文标题】：RuntimeError: unable to perform operation on the handler is closed. Django and Flutter

【发布时间】：2021-09-25 11:19:07

【问题描述】：

我是 WebSocket 编程和 Dart/Flutter 编程的新手，但对 Django/Python 并不陌生。这个玩具项目是我空闲时间自学的

我从 here 中挑选了很棒的 Django 样板，并按照频道的教程 here 进行操作

Web 浏览器 Chrome 能够重现该示例。接下来我试试 Flutter tutorial

我希望手机用户能够收听消息并发送消息。 但是我的手机只能接收来自网络用户的消息。

问题： 当手机发送消息时。 Django 断开其连接并在终端中引发此错误

django        | ERROR:    closing handshake failed
django        | Traceback (most recent call last):
django        |   File "/usr/local/lib/python3.9/site-packages/websockets/legacy/server.py", line 232, in handler
django        |     await self.close()
django        |   File "/usr/local/lib/python3.9/site-packages/websockets/legacy/protocol.py", line 779, in close
django        |     await asyncio.shield(self.close_connection_task)
django        |   File "/usr/local/lib/python3.9/site-packages/websockets/legacy/protocol.py", line 1309, in close_connection
django        |     self.transport.write_eof()
django        |   File "uvloop/handles/stream.pyx", line 696, in uvloop.loop.UVStream.write_eof
django        |   File "uvloop/handles/handle.pyx", line 159, in uvloop.loop.UVHandle._ensure_alive
django        | RuntimeError: unable to perform operation on <TCPTransport closed=True reading=False 0x55ed26012b80>; the handler is closed
django        | ERROR 2021-09-25 11:05:01,093 server 11 140336674826048 closing handshake failed
django        | Traceback (most recent call last):
django        |   File "/usr/local/lib/python3.9/site-packages/websockets/legacy/server.py", line 232, in handler
django        |     await self.close()
django        |   File "/usr/local/lib/python3.9/site-packages/websockets/legacy/protocol.py", line 779, in close
django        |     await asyncio.shield(self.close_connection_task)
django        |   File "/usr/local/lib/python3.9/site-packages/websockets/legacy/protocol.py", line 1309, in close_connection
django        |     self.transport.write_eof()
django        |   File "uvloop/handles/stream.pyx", line 696, in uvloop.loop.UVStream.write_eof
django        |   File "uvloop/handles/handle.pyx", line 159, in uvloop.loop.UVHandle._ensure_alive
django        | RuntimeError: unable to perform operation on <TCPTransport closed=True reading=False 0x55ed26012b80>; the handler is closed
django        | INFO:     connection closed

问题： 如何解决这个错误？

重现错误：

从repository结帐master docker-compose.yml -f loca.lyml up 从study_websocket 运行 Flutter 网络浏览器转到http://localhost:8000/chat/cat/。我把硬编码cat放在频道`url中 webbrowser 发送消息 手机发送消息。此时

【参考方案1】：

在发送到 WebSocket 之前，我必须使用 json.encode() 我的有效负载

_channel.sink.add(json.encode('message': _controller.text))