New DirOptions.Cache field for in-memory caching and pre-compression for the fastest possible static file server

Read HISTORY.md it contains a breaking change, second parameter of HandleDir should be iris.Dir(...) instead of just a string

relative to: https://github.com/kataras/iris/issues/1556#issuecomment-661057446


Former-commit-id: 14b48a06fb3b99287dff543932be2937a64233b9

_examples/routing/custom-wrapper/main.go

@@ -21,7 +21,7 @@ func newApp() *iris.Application {
 		ctx.Writef("Hello %s", ctx.Params().Get("username"))
 	})
 
-	app.HandleDir("/", "./public")
+	app.HandleDir("/", iris.Dir("./public"))
 
 	myOtherHandler := func(ctx iris.Context) {
 		ctx.Writef("inside a handler which is fired manually by our custom router wrapper")

_examples/routing/overview/main.go

@@ -48,17 +48,17 @@ func main() {
 
 	// GET: http://localhost:8080/assets/css/main.css
 	//	    maps to ./public/assets/css/main.css file at system location.
-	app.HandleDir("/assets", "./public/assets")
+	app.HandleDir("/assets", iris.Dir("./public/assets"))
 
 	/* OR
 
 	// GET: http://localhost:8080/css/main.css
 	// 		maps to ./public/assets/css/main.css file at system location.
-	app.HandleDir("/css", "./public/assets/css")
+	app.HandleDir("/css", iris.Dir("./public/assets/css"))
 
 	// GET: http://localhost:8080/css/bootstrap.min.css
 	// 		maps to ./public/assets/css/bootstrap.min.css file at system location.
-	app.HandleDir("/css", "./public/assets/css")
+	app.HandleDir("/css", iris.Dir("./public/assets/css"))
 
 	*/
 

_examples/routing/subdomains/multi/main.go

@@ -11,8 +11,8 @@ func main() {
 	 * Setup static files
 	 */
 
-	app.HandleDir("/assets", "./public/assets")
-	app.HandleDir("/upload_resources", "./public/upload_resources")
+	app.HandleDir("/assets", iris.Dir("./public/assets"))
+	app.HandleDir("/upload_resources", iris.Dir("./public/upload_resources"))
 
 	dashboard := app.Party("dashboard.")
 	{