add recorder for serial handler

recorder/tcp.go

@@ -0,0 +1,52 @@
+package recorder
+
+import (
+	"context"
+	"net"
+	"time"
+
+	"github.com/go-gost/core/recorder"
+)
+
+type tcpRecorderOptions struct {
+	timeout time.Duration
+}
+
+type TCPRecorderOption func(opts *tcpRecorderOptions)
+
+func TimeoutTCPRecorderOption(timeout time.Duration) TCPRecorderOption {
+	return func(opts *tcpRecorderOptions) {
+		opts.timeout = timeout
+	}
+}
+
+type tcpRecorder struct {
+	addr   string
+	dialer *net.Dialer
+}
+
+// TCPRecorder records data to TCP service.
+func TCPRecorder(addr string, opts ...TCPRecorderOption) recorder.Recorder {
+	var options tcpRecorderOptions
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	return &tcpRecorder{
+		addr: addr,
+		dialer: &net.Dialer{
+			Timeout: options.timeout,
+		},
+	}
+}
+
+func (r *tcpRecorder) Record(ctx context.Context, b []byte) error {
+	c, err := r.dialer.DialContext(ctx, "tcp", r.addr)
+	if err != nil {
+		return err
+	}
+	defer c.Close()
+
+	_, err = c.Write(b)
+	return err
+}