simple server with middlewares

channels/main.go

@@ -0,0 +1,4 @@
+package main
+
+func main() {
+}

context/http.go

@@ -0,0 +1,2 @@
+package main
+

context/main.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"net/http"
+)
+
+const PORT = 8080
+
+func main() {
+	server := Server{}
+
+	server.Handle(
+		"/get-random-number",
+		printHello,
+		handleGetRandomNumber,
+	)
+
+	if err := server.Listen(PORT); err != nil {
+		panic(err)
+	}
+	fmt.Println("listening on :", PORT)
+}
+
+func handleGetRandomNumber(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Println("Random number: ", rand.Int())
+	})
+}
+
+func printHello(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Println("hello")
+
+		next.ServeHTTP(w, r)
+	})
+}

context/server.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+)
+
+type ServerHandler func(http.Handler) http.Handler
+
+type Server struct {
+}
+
+func (s Server) Handle(addr string, handlers ...ServerHandler) {
+	http.Handle(addr, handleMiddlewares(handlers))
+}
+
+func (s Server) Listen(port int) error {
+	if err := http.ListenAndServe(fmt.Sprintf(":%d", port), nil); err != nil {
+		return fmt.Errorf("server broke: %s", err.Error())
+	}
+
+	return nil
+}
+
+func handleMiddlewares(handlers []ServerHandler) http.Handler {
+	var handler http.Handler
+
+	for i := range handlers {
+		handler = handlers[len(handlers)-1-i](handler)
+	}
+
+	return handler
+}

go.mod

@@ -0,0 +1,3 @@
+module goplayground
+
+go 1.22.0