Bug: Nonebot2通过正向Websocket连接go-cqhttp报错400

[Kaleidoscope39]

描述问题：

在目前最新的Nonebot2的release中使用websocket与go-cqhttp进行连接会报错400。
这个问题仅出现在了Linux端上，在Win环境下并不会出现400错误（无论是go-cqhttp运行在linux还是win下）。
此问题已经在私下测试完成复现了很多次。

如何复现？

前提条件：

• go-cqhttp已完成配置，连接协议为ws，host为127.0.0.1，port为6700，不启用access_token
• 已完成安装nb-cli并安装nonebot-adapter-cqhttp且创建了一个新的机器人，使用cqhttp（Nonebot2）、.env.dev已添加配置 CQHTTP_WS_URLS={"2461591632": "ws://127.0.0.1:6700/"}

1. 先行启动go-cqhttp服务
2. 然后启动nonebot2机器人

期望的结果
go-cqhttp并没有任何报错，所以不贴东西了。

Nonebot2端报错：

10-11 11:49:35 [ERROR] nonebot | Error while connecting to ws://127.0.0.1:6700/. Try to reconnect...
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.9/multiprocessing/spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "/usr/lib/python3.9/multiprocessing/spawn.py", line 129, in _main
    return self._bootstrap(parent_sentinel)
  File "/usr/lib/python3.9/multiprocessing/process.py", line 315, in _bootstrap
    self.run()
  File "/usr/lib/python3.9/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "/home/ls420/.local/lib/python3.9/site-packages/uvicorn/subprocess.py", line 76, in subprocess_started
    target(sockets=sockets)
  File "/home/ls420/.local/lib/python3.9/site-packages/uvicorn/server.py", line 68, in run
    return asyncio.run(self.serve(sockets=sockets))
  File "/usr/lib/python3.9/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
> File "/usr/local/lib/python3.9/dist-packages/nonebot/drivers/fastapi.py", line 489, in _ws_loop
    async with connection as ws:
  File "/home/ls420/.local/lib/python3.9/site-packages/websockets/legacy/client.py", line 604, in __aenter__
    return await self
  File "/home/ls420/.local/lib/python3.9/site-packages/websockets/legacy/client.py", line 629, in __await_impl__
    await protocol.handshake(
  File "/home/ls420/.local/lib/python3.9/site-packages/websockets/legacy/client.py", line 388, in handshake
    raise InvalidStatusCode(status_code)
websockets.exceptions.InvalidStatusCode: server rejected WebSocket connection: HTTP 400

环境信息：

• OS: [Ubuntu20.04-LTS_arm64/amd64]
• Python Version: [3.9.5]
• Nonebot Version: [2.0.0a16]

协议端信息：

• 协议端: [go-cqhttp]
• 协议端版本: [v1.0.0-beta7-fix2]

截图或日志

[yanyongyu]

CQHTTP_WS_URLS={"QQ": "ws://127.0.0.1:6700/"}

请正确填写你的QQ号

[Kaleidoscope39]

CQHTTP_WS_URLS={"QQ": "ws://127.0.0.1:6700/"}

请正确填写你的QQ号

Done

[yanyongyu]

依然报错？

[Kaleidoscope39]

依然报错？

这个错误本身与这个无关的，只是我懒没写上QQ号😶

[yanyongyu]

fixed in dev