add grpc logger

Author: rekby

internal/xtest/grpclogger.go

@@ -0,0 +1,45 @@
+package xtest
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/grpc"
+)
+
+// GrpcLogger use for log raw grpc messages
+//
+// Usage:
+//
+//		db, err := ydb.Open(context.Background(), connectionString,
+//	     ...
+//			ydb.With(config.WithGrpcOptions(grpc.WithChainUnaryInterceptor(xtest.NewGrpcLogger(t).UnaryClientInterceptor))),
+//		)
+type GrpcLogger struct {
+	t testing.TB
+}
+
+func NewGrpcLogger(t testing.TB) GrpcLogger {
+	return GrpcLogger{t: t}
+}
+
+func (l GrpcLogger) UnaryClientInterceptor(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+	err := invoker(ctx, method, req, reply, cc, opts...)
+	l.t.Logf("UnaryClientInterceptor: %s - err: %v\n\nreq:\n%v\n\nresp:\n%v", method, err, protoToString(req), protoToString(reply))
+	return err
+}
+
+func protoToString(v interface{}) string {
+	if mess, ok := v.(proto.Message); ok {
+		marshaler := jsonpb.Marshaler{}
+		res, err := marshaler.MarshalToString(mess)
+		if err != nil {
+			return fmt.Sprintf("failed to json marshal of: '%v' with err: ", v, err)
+		}
+		return res
+	}
+	return fmt.Sprint(v)
+}