initial import

microservices/middleware/go.mod

@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/middleware
+
+go 1.14

microservices/middleware/main.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"log"
+	"net/http"
+)
+
+func businessLogic(text string) http.Handler {
+	myFunc := func(res http.ResponseWriter, req *http.Request) {
+		res.Write([]byte(text))
+	}
+	return http.HandlerFunc(myFunc)
+}
+
+func middleWare(wrapped http.Handler) http.Handler {
+	return http.HandlerFunc(func(re http.ResponseWriter, rq *http.Request) {
+		log.Println("before request")
+		wrapped.ServeHTTP(re, rq)
+		log.Println("after request")
+	})
+}
+
+func main() {
+	http.Handle("/", middleWare(businessLogic("Hello World")))
+	if err := http.ListenAndServe(":8080", nil); err != nil {
+		log.Printf("error with server %v", err)
+	}
+}