[#151] index page: Add browse via native protocol

Signed-off-by: Nikita Zinkevich <n.zinkevich@yadro.com>

internal/handler/utils.go

@@ -2,17 +2,16 @@ package handler
 
 import (
 	"context"
-	"errors"
 	"strings"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/valyala/fasthttp"
 	"go.uber.org/zap"
@@ -46,19 +45,21 @@ func isDir(name string) bool {
 	return strings.HasSuffix(name, "/")
 }
 
+func isObjectID(s string) bool {
+	var objID oid.ID
+	return objID.DecodeString(s) == nil
+}
+
 func isContainerRoot(key string) bool {
 	return key == ""
 }
 
-func checkErrorType(err error) int {
-	switch {
-	case err == nil:
-		return fasthttp.StatusOK
-	case errors.Is(err, tree.ErrNodeAccessDenied):
-		return fasthttp.StatusForbidden
-	default:
-		return fasthttp.StatusNotFound
+func loadAttributes(attrs []object.Attribute) map[string]string {
+	result := make(map[string]string)
+	for _, attr := range attrs {
+		result[attr.Key()] = attr.Value()
 	}
+	return result
 }
 
 func isValidToken(s string) bool {