Add fallback handlers

Former-commit-id: f7e9bd17076a10e1ed1702780d7ce9e89f00b592

_examples/experimental-handlers/cors/simple/main.go

@@ -5,6 +5,7 @@ package main
 
 import (
 	"github.com/kataras/iris"
+	"github.com/kataras/iris/core/router"
 
 	"github.com/iris-contrib/middleware/cors"
 )
@@ -14,6 +15,7 @@ func main() {
 	app := iris.New()
 	crs := cors.New(cors.Options{
 		AllowedOrigins:   []string{"*"}, // allows everything, use that to change the hosts.
+		AllowedMethods:   router.AllMethods[:],
 		AllowCredentials: true,
 	})
 
@@ -29,6 +31,12 @@ func main() {
 		v1.Post("/send", func(ctx iris.Context) {
 			ctx.WriteString("sent")
 		})
+		v1.Put("/send", func(ctx iris.Context) {
+			ctx.WriteString("updated")
+		})
+		v1.Delete("/send", func(ctx iris.Context) {
+			ctx.WriteString("deleted")
+		})
 	}
 
 	// or use that to wrap the entire router

_examples/routing/fallback-handlers/main.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"github.com/kataras/iris"
+)
+
+func main() {
+	app := iris.New()
+
+	// this works as expected now,
+	// will handle *all* expect DELETE requests, even if there is no routes
+	app.Get("/action/{p}", h)
+
+	app.Run(iris.Addr(":8080"), ctx.Method(), ctx.Path(), iris.WithoutServerError(iris.ErrServerClosed))
+}
+
+func h(ctx iris.Context) {
+	ctx.Writef("[%s] %s : Parameter = `%s`", ctx.Params().Get("p"))
+}
+
+func fallbackHandler(ctx iris.Context) {
+	if ctx.Method() == "DELETE" {
+		ctx.Next()
+
+		return
+	}
+
+	ctx.Writef("[%s] %s : From fallback handler", ctx.Method(), ctx.Path())
+}