byom-core-infra-api/middleware/logging.go

package middleware

import (
	"log"
	"net/http"
	"strings"
	"time"
)

// LoggingMiddleware logs information about each HTTP request
func LoggingMiddleware(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		start := time.Now()

		// Get the real IP address
		sourceIP := r.Header.Get("X-Forwarded-For")
		if sourceIP == "" {
			sourceIP = r.RemoteAddr
		}
		// If we got multiple IPs in X-Forwarded-For, take the first one
		if strings.Contains(sourceIP, ",") {
			sourceIP = strings.Split(sourceIP, ",")[0]
		}

		log.Printf("Started %s %s from %s (source IP: %s)", r.Method, r.URL.Path, r.RemoteAddr, sourceIP)

		next.ServeHTTP(w, r)

		log.Printf("Completed %s %s from %s (source IP: %s) in %v", r.Method, r.URL.Path, r.RemoteAddr, sourceIP, time.Since(start))
	})
}