websocket example error

[stevensonmt]

not able to run the websocket example. Requesting ws://127.0.0.1:8000/chat results in

ERROR roa::logger > <-- GET / 404 Not Found

[Hexilee]

Hi, what clients are you using? Could you try this script in browser:

const socket = new WebSocket('ws://127.0.0.1:8000/chat')
socket.addEventListener('open', function (event) {
    socket.send('Hello Server!')
})
socket.addEventListener('message', function (event) {
    console.log('Message from server ', event.data)
})

[stevensonmt]

When I run that script from codepen.io in firefox it returns in the console:

"Message from server " "Hello Server!"

and the server in the terminal returns:

ERROR websocket_echo > forward err: Connection closed normally

but simply requesting 127.0.0.1:8000/chat in firefox returns in the terminal running the server

ERROR roa::logger > <-- GET /chat 400 Bad Request
invalid websocket upgrade request

Behavior is the same in chromium.

using the URL wss://127.0.0.1:8000/chat seems to work in firefox but not chromium, returning in the terminal running the server:

ERROR websocket_echo > forward err: Connection closed normally

though this is inconsistent.

[Hexilee]

It seems the socket is closed by codepen after establishing connection.

Browser cannot handle websocket protocol straightly, you should open a web console in any website without security policy.

Could you follow below steps to test websocket example?

• open a MDN web page in Firefox;
• open web console by F12 -> Console;
• run this script:

  const socket = new WebSocket('ws://127.0.0.1:8000/chat')
  socket.addEventListener('open', function (event) {
      socket.send('Hello Server!')
  })
  socket.addEventListener('message', function (event) {
      console.log('Message from server ', event.data)
  })

• if works well, run socket.send() to send more messages.

[stevensonmt]

Yes that seems to work, thanks. Is that the expected way for someone to use that example?

[Hexilee]

Yeah, it is. Could I close this issue if there is no problem else?