watch config file

README.md

@@ -0,0 +1,2 @@
+# mc-gateway
+This project is a Minecraft game server gateway. It allows you to access multiple game servers through different hostnames, using the same port.

cmd/gateway/main.go

@@ -7,6 +7,9 @@ import (
 	"net"
 	"os"
 	"sync"
+
+	"github.com/fsnotify/fsnotify"
+	"github.com/rs/zerolog/log"
 )
 
 type Config struct {
@@ -32,24 +35,51 @@ func loadConfig() error {
 	return json.Unmarshal(byteValue, &config)
 }
 
+func watchConfig() *fsnotify.Watcher {
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		log.Fatal().Err(err).Msg("Failed to create config watcher")
+	}
+	go func() {
+		for {
+			_, ok := <-watcher.Events
+			if !ok {
+				return
+			}
+			loadConfig()
+		}
+	}()
+	err = watcher.Add("config.json")
+	if err != nil {
+		log.Fatal().Err(err).Msg("Failed to watch config file")
+	}
+
+	return watcher
+}
+
 func main() {
 	if err := loadConfig(); err != nil {
 		panic(err)
 	}
 
+	watcher := watchConfig()
+	defer watcher.Close()
+
 	// 监听TCP端口
 	listener, err := net.Listen("tcp", fmt.Sprintf(":%d", config.Port))
 	if err != nil {
 		panic(err)
 	}
 	defer listener.Close()
-	fmt.Println("Listening on :25565")
+	log.Info().
+		Int("port", config.Port).
+		Msg("Listening")
 
 	for {
 		// 接受传入的连接
 		conn, err := listener.Accept()
 		if err != nil {
-			fmt.Println("Error accepting:", err.Error())
+			log.Err(err).Msg("Error accepting")
 			continue
 		}
 		// 处理连接
@@ -64,7 +94,7 @@ func handleRequest(conn net.Conn) {
 	buf := make([]byte, 1024)
 	n, err := conn.Read(buf)
 	if err != nil {
-		fmt.Println("Error reading:", err.Error())
+		log.Err(err).Msg("Error reading hostname")
 		return
 	}
 	mc_host := GetMcHost(buf[:n])
@@ -75,7 +105,7 @@ func handleRequest(conn net.Conn) {
 
 	client, err := net.Dial("tcp", host)
 	if err != nil {
-		fmt.Println("Error dialing:", err.Error())
+		log.Err(err).Msg("Error dialing")
 		return
 	}
 	defer client.Close()

go.mod

@@ -1,3 +1,15 @@
 module github.com/tursom/mc-gateway
 
 go 1.23.1
+
+require github.com/fsnotify/fsnotify v1.7.0
+
+require (
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+)
+
+require (
+	github.com/rs/zerolog v1.33.0
+	golang.org/x/sys v0.12.0 // indirect
+)

go.sum

@@ -0,0 +1,19 @@
+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
+github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
+github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
+github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
+github.com/rs/zerolog v1.33.0 h1:1cU2KZkvPxNyfgEmhHAz/1A9Bz+llsdYzklWFzgp0r8=
+github.com/rs/zerolog v1.33.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.4.0 h1:Zr2JFtRQNX3BCZ8YtxRE9hNJYC8J6I1MVbMg6owUp18=
+golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=