ngx-socket-io 连接错误，但flask_socketio 日志显示 200 OK

问题描述

任何调试技巧都会有所帮助，这只是基本实现。

我使用这里的确切教程来设置 ngx 套接字客户端： https://www.npmjs.com/package/ngx-socket-io

用于服务器的flask-socketio https://flask-socketio.readthedocs.io/en/latest/

服务器端没有显示错误，但注册的发送/接收处理程序方法似乎是盲目的。

服务器日志：

127.0.0.1 - - [28/Jan/2021 10:58:51] "GET /socket.io/?EIO=3&transport=polling&t=NT8Dtbg HTTP/1.1" 200 418 0.000640
(12285) accepted ('127.0.0.1',37400)
fa1a1d40bbc349c384a121302ef567c7: Received request to upgrade to websocket
127.0.0.1 - - [28/Jan/2021 10:58:51] "GET /socket.io/?EIO=3&transport=polling&t=NT8Dtcd&sid=fa1a1d40bbc349c384a121302ef567c7 HTTP/1.1" 200 235 0.000408
127.0.0.1 - - [28/Jan/2021 10:58:51] "GET /socket.io/?EIO=3&transport=polling&t=NT8DtdE&sid=fa1a1d40bbc349c384a121302ef567c7 HTTP/1.1" 200 235 0.000268
fa1a1d40bbc349c384a121302ef567c7: Upgrade to websocket successful
5002732d42184ba6b453e7d4f35e864e: Received packet PING data None
5002732d42184ba6b453e7d4f35e864e: Sending packet PONG data None

客户端日志：

config: {url: "http://127.0.0.1:5000/",options: {…}}
emptyConfig: {url: "",options: {…}}
eventObservables$: {}
ioSocket: Socket
acks: {}
connected: false
disconnected: true
flags: {}
ids: 0
io: Manager
autoConnect: true
backoff: Backoff {ms: 1000,max: 5000,factor: 2,jitter: 0.5,attempts: 0}
connecting: [Socket]
decoder: Decoder {reconstructor: null,_callbacks: {…}}
encoder: Encoder {}
encoding: false
engine: Socket {secure: false,agent: false,hostname: "127.0.0.1",port: "5000",query: {…},…}
lastPing: Thu Jan 28 2021 11:00:56

服务器代码（无打印）

@socketio.on('connect')
def test_connect():
    print('\n\nClient connected')

为什么我无法建立连接？谢谢

解决方法

仔细检查当前版本的 socketio 和 engineio 的 npm/python 环境。 https://github.com/miguelgrinberg/python-socketio

d7e95928d73c42fab431e94ce2df40fc: Sending packet OPEN data {'sid': 'd7e95928d73c42fab431e94ce2df40fc','upgrades': ['websocket'],'pingTimeout': 60000,'pingInterval': 25000}


Client connected
d7e95928d73c42fab431e94ce2df40fc: Sending packet MESSAGE data 0