golang实现拦截器方案

路由配置，并使用该拦截器，releases.Use(checkToken)，有配置的接口才会生效

router := gin.Default()
router.GET("/", func(c *gin.Context) {
   c.String(http.StatusOK, "Welcome helm wrapper server")
})
// register router
	RegisterRouter(router)

func RegisterRouter(router *gin.Engine) {
   // helm chart
   charts := router.Group("/api/charts")
   {
      // helm show
      charts.GET("", showChartInfo)
      // upload chart
      charts.POST("/upload", uploadChart)
      // list uploaded charts
      charts.GET("/upload", listUploadedCharts)
      // delete chart
      charts.DELETE("/upload/:chart", deleteChart)
   }
   // helm release
   releases := router.Group("/api/namespaces/:namespace/releases")
   {
      // 使用指定拦截器 
      releases.Use(checkToken)
      // helm list releases ->  helm list
      releases.GET("", listReleases)
      // helm get
      releases.GET("/:release", showReleaseInfo)
      // helm install
      releases.POST("/:release", installRelease)
      // helm upgrade
      releases.PUT("/:release", upgradeRelease)
   }
}