golang 的 go异步编程通道要注意的问题

import (
	"database/sql"
	"fmt"
	"github.com/gin-gonic/gin"
	_ "github.com/go-sql-driver/mysql"
	"log"
	"time"
)

var Db *sql.DB


func main() {


	c1 := make(chan string)


	r := gin.Default()
	r.GET("/ping", func(c *gin.Context) {


		go say("wfe", c1)
		y := <-c1// 从通道 c 中接收


		c.JSON(200, gin.H{
			"message": y,
		})

	
	})
	
	r.Run(":8082") // listen and serve on 0.0.0.0:8080
}