feat: support listening on a UNIX socket (#4654)

bin/memos/main.go

@@ -39,6 +39,7 @@ var (
 				Mode:        viper.GetString("mode"),
 				Addr:        viper.GetString("addr"),
 				Port:        viper.GetInt("port"),
+				UNIXSock:    viper.GetString("unix-sock"),
 				Data:        viper.GetString("data"),
 				Driver:      viper.GetString("driver"),
 				DSN:         viper.GetString("dsn"),
@@ -106,6 +107,7 @@ func init() {
 	rootCmd.PersistentFlags().String("mode", "dev", `mode of server, can be "prod" or "dev" or "demo"`)
 	rootCmd.PersistentFlags().String("addr", "", "address of server")
 	rootCmd.PersistentFlags().Int("port", 8081, "port of server")
+	rootCmd.PersistentFlags().String("unix-sock", "", "path to the unix socket, overrides --addr and --port")
 	rootCmd.PersistentFlags().String("data", "", "data directory")
 	rootCmd.PersistentFlags().String("driver", "sqlite", "database driver")
 	rootCmd.PersistentFlags().String("dsn", "", "database source name(aka. DSN)")
@@ -120,6 +122,9 @@ func init() {
 	if err := viper.BindPFlag("port", rootCmd.PersistentFlags().Lookup("port")); err != nil {
 		panic(err)
 	}
+	if err := viper.BindPFlag("unix-sock", rootCmd.PersistentFlags().Lookup("unix-sock")); err != nil {
+		panic(err)
+	}
 	if err := viper.BindPFlag("data", rootCmd.PersistentFlags().Lookup("data")); err != nil {
 		panic(err)
 	}
@@ -151,16 +156,21 @@ version: %s
 data: %s
 addr: %s
 port: %d
+unix-sock: %s
 mode: %s
 driver: %s
 ---
-`, profile.Version, profile.Data, profile.Addr, profile.Port, profile.Mode, profile.Driver)
+`, profile.Version, profile.Data, profile.Addr, profile.Port, profile.UNIXSock, profile.Mode, profile.Driver)
 
 	print(greetingBanner)
-	if len(profile.Addr) == 0 {
-		fmt.Printf("Version %s has been started on port %d\n", profile.Version, profile.Port)
+	if len(profile.UNIXSock) == 0 {
+		if len(profile.Addr) == 0 {
+			fmt.Printf("Version %s has been started on port %d\n", profile.Version, profile.Port)
+		} else {
+			fmt.Printf("Version %s has been started on address '%s' and port %d\n", profile.Version, profile.Addr, profile.Port)
+		}
 	} else {
-		fmt.Printf("Version %s has been started on address '%s' and port %d\n", profile.Version, profile.Addr, profile.Port)
+		fmt.Printf("Version %s has been started on unix socket %s\n", profile.Version, profile.UNIXSock)
 	}
 	fmt.Printf(`---
 See more in:

server/profile/profile.go

@@ -19,6 +19,8 @@ type Profile struct {
 	Addr string
 	// Port is the binding port for server
 	Port int
+	// UNIXSock is the IPC binding path. Overrides Addr and Port
+	UNIXSock string
 	// Data is the data directory
 	Data string
 	// DSN points to where memos stores its own data

server/router/api/v1/v1.go

@@ -67,8 +67,14 @@ func NewAPIV1Service(secret string, profile *profile.Profile, store *store.Store
 
 // RegisterGateway registers the gRPC-Gateway with the given Echo instance.
 func (s *APIV1Service) RegisterGateway(ctx context.Context, echoServer *echo.Echo) error {
+	var target string
+	if len(s.Profile.UNIXSock) == 0 {
+		target = fmt.Sprintf("%s:%d", s.Profile.Addr, s.Profile.Port)
+	} else {
+		target = fmt.Sprintf("unix:%s", s.Profile.UNIXSock)
+	}
 	conn, err := grpc.NewClient(
-		fmt.Sprintf("%s:%d", s.Profile.Addr, s.Profile.Port),
+		target,
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(math.MaxInt32)),
 	)

server/server.go

@@ -93,8 +93,15 @@ func NewServer(ctx context.Context, profile *profile.Profile, store *store.Store
 }
 
 func (s *Server) Start(ctx context.Context) error {
-	address := fmt.Sprintf("%s:%d", s.Profile.Addr, s.Profile.Port)
-	listener, err := net.Listen("tcp", address)
+	var address, network string
+	if len(s.Profile.UNIXSock) == 0 {
+		address = fmt.Sprintf("%s:%d", s.Profile.Addr, s.Profile.Port)
+		network = "tcp"
+	} else {
+		address = s.Profile.UNIXSock
+		network = "unix"
+	}
+	listener, err := net.Listen(network, address)
 	if err != nil {
 		return errors.Wrap(err, "failed to listen")
 	}