client.ts

new WebSocket("ws://localhost:1323/ws", ["hello", "world"])

main.go

package main

import (
	"fmt"

	"github.com/labstack/echo/v4"
	"golang.org/x/net/websocket"
)

func hello(c echo.Context) error {
	websocket.Handler(func(ws *websocket.Conn) {
		defer ws.Close()
		for {
			// Write
			err := websocket.Message.Send(ws, "Hello, Client!")
			if err != nil {
				c.Logger().Error(err)
			}

			// Read
			msg := ""
			err = websocket.Message.Receive(ws, &msg)
			if err != nil {
				c.Logger().Error(err)
			}
			fmt.Printf("%s\n", msg)
		}
	}).ServeHTTP(c.Response(), c.Request())
	return nil
}

func auth(next echo.HandlerFunc) echo.HandlerFunc {
	return func(c echo.Context) error {
		id := c.Request().Header["id"]
		fmt.Println(id)
		c.Set("id", id)
		return next(c)
	}
}

func wsParse(next echo.HandlerFunc) echo.HandlerFunc {
	return func(c echo.Context) error {
		swp := c.Request().Header["Sec-Websocket-Protocol"]
		c.Request().Header["id"] = swp
		return auth(next)(c)
	}
}

func main() {
	e := echo.New()
	e.Use(wsParse)
	e.GET("/ws", hello)
	e.Logger.Fatal(e.Start(":1323"))
}