Added built-in mDNS server.

main.go

@@ -1,7 +1,10 @@
 package main
 
 import (
+	"github.com/micro/mdns"
+
 	"flag"
+	"fmt"
 	"log"
 	"os"
 	"os/signal"
@@ -10,20 +13,62 @@ import (
 
 func main() {
 	var (
-		addr      = flag.String("addr", ":8000", "`host:port` to listen on")
+		host      = flag.String("host", "0.0.0.0", "`host` to listen on")
+		port      = flag.Int("port", 8000, "`port` to listen on")
 		directory = flag.String("directory", "/var/cache/go-aptproxy", "`directory` used for storing packages")
 	)
 	flag.Parse()
-	s, err := NewServer(*addr, *directory)
+
+	// Create the HTTP server and initialize the cache
+	addr := fmt.Sprintf("%s:%d", *host, *port)
+	httpServer, err := NewServer(addr, *directory)
 	if err != nil {
 		log.Println(err)
 		os.Exit(1)
 	}
-	s.Start()
+	log.Println("Starting HTTP server...")
-	defer s.Stop()
+	if err = httpServer.Start(); err != nil {
-	log.Println("APT proxy started")
+		log.Println(err)
+		os.Exit(1)
+	}
+	defer func() {
+		httpServer.Stop()
+		log.Println("Stopping HTTP server...")
+	}()
+
+	// Respond to mDNS queries
+	h, err := os.Hostname()
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	service, err := mdns.NewMDNSService(
+		h,
+		"_apt_proxy._tcp",
+		"",
+		"",
+		*port,
+		nil,
+		[]string{"go-aptproxy - Smarter APT Proxy"},
+	)
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	log.Println("Starting mDNS server...")
+	mDNSServer, err := mdns.NewServer(&mdns.Config{Zone: service})
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	defer func() {
+		mDNSServer.Shutdown()
+		log.Println("Stopping mDNS server...")
+	}()
+
+	// Wait for a signal
 	c := make(chan os.Signal)
 	signal.Notify(c, syscall.SIGINT)
 	<-c
-	log.Println("APT proxy shut down by signal")
+	log.Println("Caught SIGINT")
 }