[#1086] neofs-cli: add command for shard dump

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

cmd/neofs-cli/modules/control.go

@@ -181,6 +181,7 @@ func init() {
 
 	shardsCmd.AddCommand(listShardsCmd)
 	shardsCmd.AddCommand(setShardModeCmd)
+	shardsCmd.AddCommand(dumpShardCmd)
 
 	controlCmd.AddCommand(
 		healthCheckCmd,
@@ -196,6 +197,7 @@ func init() {
 	initControlSnapshotCmd()
 	initControlShardsListCmd()
 	initControlSetShardModeCmd()
+	initControlDumpShardCmd()
 }
 
 func healthCheck(cmd *cobra.Command, _ []string) {

cmd/neofs-cli/modules/dump.go

@@ -0,0 +1,76 @@
+package cmd
+
+import (
+	"github.com/mr-tron/base58"
+	"github.com/nspcc-dev/neofs-node/pkg/services/control"
+	controlSvc "github.com/nspcc-dev/neofs-node/pkg/services/control/server"
+	"github.com/nspcc-dev/neofs-sdk-go/util/signature"
+	"github.com/spf13/cobra"
+)
+
+const (
+	dumpFilepathFlag     = "path"
+	dumpIgnoreErrorsFlag = "no-errors"
+)
+
+var dumpShardCmd = &cobra.Command{
+	Use:   "dump",
+	Short: "Dump objects from shard",
+	Long:  "Dump objects from shard to a file",
+	Run:   dumpShard,
+}
+
+func dumpShard(cmd *cobra.Command, _ []string) {
+	key, err := getKeyNoGenerate()
+	exitOnErr(cmd, err)
+
+	body := new(control.DumpShardRequest_Body)
+
+	rawID, err := base58.Decode(shardID)
+	exitOnErr(cmd, errf("incorrect shard ID encoding: %w", err))
+	body.SetShardID(rawID)
+
+	p, _ := cmd.Flags().GetString(dumpFilepathFlag)
+	body.SetFilepath(p)
+
+	ignore, _ := cmd.Flags().GetBool(dumpIgnoreErrorsFlag)
+	body.SetIgnoreErrors(ignore)
+
+	req := new(control.DumpShardRequest)
+	req.SetBody(body)
+
+	err = controlSvc.SignMessage(key, req)
+	exitOnErr(cmd, errf("could not sign request: %w", err))
+
+	cli, err := getControlSDKClient(key)
+	exitOnErr(cmd, err)
+
+	resp, err := control.DumpShard(cli.Raw(), req)
+	exitOnErr(cmd, errf("rpc error: %w", err))
+
+	sign := resp.GetSignature()
+
+	err = signature.VerifyDataWithSource(
+		resp,
+		func() ([]byte, []byte) {
+			return sign.GetKey(), sign.GetSign()
+		},
+	)
+	exitOnErr(cmd, errf("invalid response signature: %w", err))
+
+	cmd.Println("Shard has been dumped successfully.")
+}
+
+func initControlDumpShardCmd() {
+	initCommonFlagsWithoutRPC(dumpShardCmd)
+
+	flags := dumpShardCmd.Flags()
+	flags.String(controlRPC, controlRPCDefault, controlRPCUsage)
+	flags.StringVarP(&shardID, shardIDFlag, "", "", "Shard ID in base58 encoding")
+	flags.String(dumpFilepathFlag, "", "File to write objects to")
+	flags.Bool(dumpIgnoreErrorsFlag, false, "Skip invalid/unreadable objects")
+
+	_ = dumpShardCmd.MarkFlagRequired(shardIDFlag)
+	_ = dumpShardCmd.MarkFlagRequired(dumpFilepathFlag)
+	_ = dumpShardCmd.MarkFlagRequired(controlRPC)
+}

pkg/services/control/rpc.go

@@ -148,7 +148,7 @@ func SetShardMode(
 
 // DumpShard executes ControlService.DumpShard RPC.
 func DumpShard(cli *client.Client, req *DumpShardRequest, opts ...client.CallOption) (*DumpShardResponse, error) {
-	wResp := new(dumpShardResponseWrapper)
+	wResp := &dumpShardResponseWrapper{new(DumpShardResponse)}
 	wReq := &requestWrapper{m: req}
 
 	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceName, rpcDumpShard), wReq, wResp, opts...)