go_echo/main.go

package main

import (
	"fmt"
	"net/http"

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

type result struct {
	// 通过json标签指定json字段名
	Sataus     int `json:"sataus"`
	Code       int `json:"code"`
	Tip_number int `json:"tip_number"`
}

var tip_number int = 0

func main() {
	e := echo.New()
	e.Use(middleware.CORSWithConfig(middleware.CORSConfig{AllowOrigins: []string{"*"}, AllowMethods: []string{echo.GET, echo.HEAD, echo.PUT, echo.PATCH, echo.POST, echo.DELETE}}))

	e.GET("/add", add)
	e.GET("/ws", ws)
	e.Logger.Fatal(e.Start(":1323"))
}

func add(c echo.Context) error {
	tip_number++
	return c.JSON(http.StatusOK, "ok")
}
func ws(c echo.Context) error {

	websocket.Handler(func(ws *websocket.Conn) {
		defer ws.Close()
		for {
			// Write
			err := websocket.Message.Send(ws, tip_number)
			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
}