refactor(go): refactor WithTLS

Author: chengxilo

foreign/go/client/tcp/tcp_core.go

@@ -63,13 +63,7 @@ type config struct {
 	serverAddress string
 	// tlsEnabled indicates whether to use TLS when connecting to the server
 	tlsEnabled bool
-	// tlsDomain is the domain to use for TLS when connecting to the server
-	// If empty, automatically extracts the hostname/IP from serverAddress
-	tlsDomain string
-	// tlsCAFile is the path to the CA file to use for TLS
-	tlsCAFile string
-	// tlsValidateCertificate indicates whether to validate the server's TLS certificate
-	tlsValidateCertificate bool
+	tls        tlsConfig
 	// autoLogin indicates whether to automatically login user after establishing connection.
 	autoLogin AutoLogin
 	// reconnection indicates whether to automatically reconnect when disconnected
@@ -80,14 +74,12 @@ type config struct {
 
 func defaultTcpClientConfig() config {
 	return config{
-		serverAddress:          "127.0.0.1:8090",
-		tlsEnabled:             false,
-		tlsDomain:              "",
-		tlsCAFile:              "",
-		tlsValidateCertificate: true,
-		autoLogin:              AutoLogin{},
-		reconnection:           defaultTcpClientReconnectionConfig(),
-		noDelay:                false,
+		serverAddress: "127.0.0.1:8090",
+		tlsEnabled:    false,
+		tls:           defaultTLSConfig(),
+		autoLogin:     AutoLogin{},
+		reconnection:  defaultTcpClientReconnectionConfig(),
+		noDelay:       false,
 	}
 }
 
@@ -107,6 +99,24 @@ func defaultTcpClientReconnectionConfig() tcpClientReconnectionConfig {
 	}
 }
 
+type tlsConfig struct {
+	// tlsDomain is the domain to use for TLS when connecting to the server
+	// If empty, automatically extracts the hostname/IP from serverAddress
+	tlsDomain string
+	// tlsCAFile is the path to the CA file to use for TLS
+	tlsCAFile string
+	// tlsValidateCertificate indicates whether to validate the server's TLS certificate
+	tlsValidateCertificate bool
+}
+
+func defaultTLSConfig() tlsConfig {
+	return tlsConfig{
+		tlsDomain:              "",
+		tlsCAFile:              "",
+		tlsValidateCertificate: true,
+	}
+}
+
 type AutoLogin struct {
 	enabled     bool
 	credentials Credentials
@@ -145,32 +155,40 @@ func WithServerAddress(address string) Option {
 	}
 }
 
-// WithTLS enables or disables TLS for the TCP client.
-func WithTLS(enabled bool) Option {
+// TLSOption is a functional option for configuring TLS settings.
+type TLSOption func(cfg *tlsConfig)
+
+// WithTLS enables TLS for the TCP client and applies the given TLS options.
+func WithTLS(tlsOpts ...TLSOption) Option {
 	return func(opts *Options) {
-		opts.config.tlsEnabled = enabled
+		opts.config.tlsEnabled = true
+		for _, tlsOpt := range tlsOpts {
+			if tlsOpt != nil {
+				tlsOpt(&opts.config.tls)
+			}
+		}
 	}
 }
 
 // WithTLSDomain sets the TLS domain for server name indication (SNI).
-// If empty, the domain will be automatically extracted from the server address.
-func WithTLSDomain(domain string) Option {
-	return func(opts *Options) {
-		opts.config.tlsDomain = domain
+// If not provided, the domain will be automatically extracted from the server address.
+func WithTLSDomain(domain string) TLSOption {
+	return func(cfg *tlsConfig) {
+		cfg.tlsDomain = domain
 	}
 }
 
-// WithTLSCAFile sets the path to the CA certificate file for TLS verification.
-func WithTLSCAFile(path string) Option {
-	return func(opts *Options) {
-		opts.config.tlsCAFile = path
+// WithCAFile sets the path to the CA certificate file for TLS verification.
+func WithCAFile(path string) TLSOption {
+	return func(cfg *tlsConfig) {
+		cfg.tlsCAFile = path
 	}
 }
 
 // WithTLSValidateCertificate enables or disables TLS certificate validation.
-func WithTLSValidateCertificate(validate bool) Option {
-	return func(opts *Options) {
-		opts.config.tlsValidateCertificate = validate
+func WithTLSValidateCertificate(validate bool) TLSOption {
+	return func(cfg *tlsConfig) {
+		cfg.tlsValidateCertificate = validate
 	}
 }
 
@@ -392,11 +410,11 @@ func (c *IggyTcpClient) connect() error {
 
 func (c *IggyTcpClient) createTLSConfig() (*tls.Config, error) {
 	tlsConfig := &tls.Config{
-		InsecureSkipVerify: !c.config.tlsValidateCertificate,
+		InsecureSkipVerify: !c.config.tls.tlsValidateCertificate,
 	}
 
 	// Set server name for SNI
-	serverName := c.config.tlsDomain
+	serverName := c.config.tls.tlsDomain
 	if serverName == "" {
 		// Extract hostname from server address (format: "host:port")
 		host := c.currentServerAddress
@@ -412,8 +430,8 @@ func (c *IggyTcpClient) createTLSConfig() (*tls.Config, error) {
 	tlsConfig.ServerName = serverName
 
 	// Load CA certificate if provided
-	if c.config.tlsCAFile != "" {
-		caCert, err := os.ReadFile(c.config.tlsCAFile)
+	if c.config.tls.tlsCAFile != "" {
+		caCert, err := os.ReadFile(c.config.tls.tlsCAFile)
 		if err != nil {
 			return nil, ierror.ErrInvalidTlsCertificatePath
 		}

foreign/go/tests/tls_test.go

@@ -155,9 +155,10 @@ func TestTCPTLSConnection_WithCA_Success(t *testing.T) {
 	cli, err := client.NewIggyClient(
 		client.WithTcp(
 			tcp.WithServerAddress(connectAddr),
-			tcp.WithTLS(true),
-			tcp.WithTLSCAFile(caFile),
-			tcp.WithTLSDomain("localhost"),
+			tcp.WithTLS(
+				tcp.WithTLSDomain("localhost"),
+				tcp.WithCAFile(caFile),
+			),
 		),
 	)
 	require.NoError(t, err, "Failed to create TLS client")
@@ -183,7 +184,6 @@ func TestTCPTLSConnection_WithoutTLS_Failure(t *testing.T) {
 	cli, err := client.NewIggyClient(
 		client.WithTcp(
 			tcp.WithServerAddress(connectAddr),
-			tcp.WithTLS(false),
 		),
 	)
 
@@ -211,9 +211,10 @@ func TestTCPTLSConnection_MessageFlow_Success(t *testing.T) {
 	cli, err := client.NewIggyClient(
 		client.WithTcp(
 			tcp.WithServerAddress(connectAddr),
-			tcp.WithTLS(true),
-			tcp.WithTLSCAFile(caFile),
-			tcp.WithTLSDomain("localhost"),
+			tcp.WithTLS(
+				tcp.WithTLSDomain("localhost"),
+				tcp.WithCAFile(caFile),
+			),
 		),
 	)
 	require.NoError(t, err, "Failed to create TLS client")