add middleware for request logging

golang/cmd/frontend/routes.go

@@ -1,19 +1,33 @@
 package main
 
 import (
+	"log"
 	"net/http"
+	"time"
 )
 
+// LoggingMiddleware logs details about each incoming HTTP request.
+func LoggingMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+
+		// Call the next handler
+		next.ServeHTTP(w, r)
+
+		log.Printf("[request] %s %s from %s (%v)", r.URL.Path, r.Method, r.RemoteAddr, time.Since(start))
+	})
+}
+
 func (app *App) routes() http.Handler {
-    mux := http.NewServeMux()
+	mux := http.NewServeMux()
 
-    // dynamic routes
-    mux.HandleFunc("GET /", app.Index)
-    mux.HandleFunc("POST /up/search", app.UpSearch)
+	// dynamic routes
+	mux.Handle("GET /", LoggingMiddleware(http.HandlerFunc(app.Index)))
+	mux.Handle("POST /up/search", LoggingMiddleware(http.HandlerFunc(app.UpSearch)))
 
-    // serve files from the "static" directory
+	// serve files from the "static" directory
 	fs := http.FileServer(http.Dir("assets/static"))
 	mux.Handle("GET /static/", http.StripPrefix("/", fs))
 
-    return mux
+	return mux
 }