一般跨域不推荐写在程序里。应该配置在nginx里或网关里
    如果你非要写 应该配置一个Gin 原始中间件

    1.  func cros() gin.HandlerFunc {
    2.     return func(c *gin.Context) {
    3.         method := c.Request.Method
    4.         if method != "" {
    5.             c.Header("Access-Control-Allow-Origin", "*") // 可将将 * 替换为指定的域名
    6.             c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE")
    7.             c.Header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization,X-Token")
    8.             c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Cache-Control, Content-Language, Content-Type")
    9.             c.Header("Access-Control-Allow-Credentials", "true")
    10.         }
    11.         if method == "OPTIONS" {
    12.             c.AbortWithStatus(http.StatusNoContent)
    13.         }
    15.     }
    16. }
    17. func main() {
    18.     //Ignite方法 支持 配置原始Gin 中间件，全局的
    19.     goft.Ignite(cros()).
    20.         Config(Configuration.NewMyConfig()).
    21.         Attach(fairing.NewGlobalFairing()).
    22.         Mount("", classes.NewIndexClass()). //控制器，挂载到v1
    23.         Launch()
    24. }