Golang实现WebAPI统一返回格式教程

type Response struct {
    Code    int         `json:"code"`
    Message string      `json:"message"`
    Data    interface{} `json:"data,omitempty"`
    Timestamp int64     `json:"timestamp"`
}

func Success(c *gin.Context, data interface{}) {
    c.JSON(http.StatusOK, Response{
        Code:      0,
        Message:   "success",
        Data:      data,
        Timestamp: time.Now().Unix(),
    })
}

func Error(c *gin.Context, code int, message string) {
    c.JSON(http.StatusOK, Response{
        Code:      code,
        Message:   message,
        Timestamp: time.Now().Unix(),
    })
}

func Recovery() gin.HandlerFunc {
    return func(c *gin.Context) {
        defer func() {
            if err := recover(); err != nil {
                log.Printf("Panic: %v", err)
                Error(c, 500, "Internal server error")
            }
        }()
        c.Next()
    }
}

func GetUser(c *gin.Context) {
    user, err := userService.FindByID(c.Param("id"))
    if err != nil {
        Error(c, 404, "User not found")
        return
    }
    Success(c, user)
}