[Question] examples/chat seems not working well

[waro163]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

when i run the example/chat code, it can NOT work as expect, when i open http://localhost:8080/ and send some message, it will show "Connection closed."
then i use Postman(https://www.postman.com/) to test WebSocket connecting, connect localhost:8080/ws is good, but when i send some message to server, it will Disconnected, and get a error: Disconnected from localhost:8080/ws 1002 Protocol Error: RSV1 set, bad opcode 7, bad MASK

Expected Behavior

work good, and can run chat demo

Steps To Reproduce

1. cd examples/chat
2. go run *.go
3. open the chrome, open "http://localhost:8080/"
4. input some message in form, click "send" button
5. Connection closed.

Anything else?

No response