gin 設置cookie

• 不知道爲什麼用gin.Context的SetCookie方法設置不到cookie，有待研究
• 一位偉大的網友記錄的方法，學習一下
• 參考鏈接

package main
import (
    "fmt"
    "github.com/gin-gonic/gin"
    "net/http"
    "strconv"
)
func main() {
    r := gin.Default()
    r.Use(cookieCheck())
    r.GET("/http_cookie", func(c *gin.Context) {
		if cookie, err := c.Request.Cookie("cookie"); err == nil {
            fmt.Println("http cookie")
			c.String(http.StatusOK, cookie.Value)
		}
    })
    r.Run(":8080")
}

func cookieCheck() gin.HandlerFunc {
    return func(c *gin.Context) {
        if cookie, err := c.Request.Cookie("cookie"); err == nil {
            value := cookie.Value
            if v, err := strconv.Atoi(value); err == nil {
                i := v + 1
                cookie.Value = fmt.Sprintf("%d", i)
            }
            http.SetCookie(c.Writer, cookie)
            c.Next()
		} else {
			cookie := &http.Cookie{
                Name:  "cookie",
                Value: "0",
            }
            http.SetCookie(c.Writer, cookie)
		}
    }
}