fix the static file dir

@@ -68,6 +68,9 @@ func serverStaticRouter(ctx *context.Context) {
 			if finfo.IsDir() && !DirectoryIndex {
 			if finfo.IsDir() && !DirectoryIndex {
 				middleware.Exception("403", ctx.ResponseWriter, ctx.Request, "403 Forbidden")
 				middleware.Exception("403", ctx.ResponseWriter, ctx.Request, "403 Forbidden")
 				return
 				return
+			} else if ctx.Input.Request.URL.Path[len(ctx.Input.Request.URL.Path)-1] != '/' {
+				http.Redirect(ctx.ResponseWriter, ctx.Request, ctx.Input.Request.URL.Path+"/", 302)
+				return
 			}
 			}
 
 
 			//This block obtained from (https://github.com/smithfox/beego) - it should probably get merged into astaxie/beego after a pull request
 			//This block obtained from (https://github.com/smithfox/beego) - it should probably get merged into astaxie/beego after a pull request