Move to frostfs-node

Signed-off-by: Pavel Karpy <p.karpy@yadro.com>

cmd/frostfs-cli/internal/common/token.go

@@ -0,0 +1,66 @@
+package common
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/TrueCloudLab/frostfs-sdk-go/bearer"
+	"github.com/spf13/cobra"
+)
+
+// ReadBearerToken reads bearer token from the path provided in a specified flag.
+func ReadBearerToken(cmd *cobra.Command, flagname string) *bearer.Token {
+	path, err := cmd.Flags().GetString(flagname)
+	ExitOnErr(cmd, "", err)
+
+	if len(path) == 0 {
+		return nil
+	}
+
+	PrintVerbose("Reading bearer token from file [%s]...", path)
+
+	var tok bearer.Token
+
+	err = ReadBinaryOrJSON(&tok, path)
+	ExitOnErr(cmd, "invalid bearer token: %v", err)
+
+	return &tok
+}
+
+// BinaryOrJSON is an interface of entities which provide json.Unmarshaler
+// and NeoFS binary decoder.
+type BinaryOrJSON interface {
+	Unmarshal([]byte) error
+	json.Unmarshaler
+}
+
+// ReadBinaryOrJSON reads file data using provided path and decodes
+// BinaryOrJSON from the data.
+func ReadBinaryOrJSON(dst BinaryOrJSON, fPath string) error {
+	PrintVerbose("Reading file [%s]...", fPath)
+
+	// try to read session token from file
+	data, err := os.ReadFile(fPath)
+	if err != nil {
+		return fmt.Errorf("read file <%s>: %w", fPath, err)
+	}
+
+	PrintVerbose("Trying to decode binary...")
+
+	err = dst.Unmarshal(data)
+	if err != nil {
+		PrintVerbose("Failed to decode binary: %v", err)
+
+		PrintVerbose("Trying to decode JSON...")
+
+		err = dst.UnmarshalJSON(data)
+		if err != nil {
+			PrintVerbose("Failed to decode JSON: %v", err)
+			return errors.New("invalid format")
+		}
+	}
+
+	return nil
+}