fail to connect websocket, Invalid frame header

[liuhanqu]

Version

3.0.1

Reproduction link

https://github.com/liuhanqu/vuecli-demo

Node and OS info

npm: 6.2.0, os: mac

Steps to reproduce

1. cd client && npm i && npm run serve
2. cd server && npm i && npm start
3. open browser to 'http://localhost:8888/laboratory'

What is expected?

websocket connect success

What is actually happening?

websocket fail to connect

bug image

[LinusBorg]

You are runing your app server in front of the dev-server, while the usual setup is the other way around. Why would you do that?

If you want to keep doing that, you will have to proxy websocket connections from your app server through to your devserver with a middle ware. That's not a problem for us to solve, though.

[liuhanqu]

render a html, sometimes u would output some variable to html.
when use dev-server, it can not do that.
maybe my implementation is wrong.
thanks.

[FullStackAlex]

"Why would you do that?"
Server-Side-Rendering with PHP for example like in my case?
As far as I know is SSR part of the Vue project. Or am I wrong?