[#463] Move DefaultLocationConstraint constant into api

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

api/headers.go

@@ -66,6 +66,8 @@ const (
 	AccessControlRequestHeaders = "Access-Control-Request-Headers"
 
 	Vary = "Vary"
+
+	DefaultLocationConstraint = "default"
 )
 
 // S3 request query params.

api/layer/container.go

@@ -28,7 +28,6 @@ type (
 
 const (
 	attributeLocationConstraint = ".s3-location-constraint"
-	DefaultLocationConstraint   = "default"
 	AttributeLockEnabled        = "LockEnabled"
 )
 
@@ -125,7 +124,7 @@ func (n *layer) createContainer(ctx context.Context, p *CreateBucketParams) (*da
 	var err error
 	ownerID := n.Owner(ctx)
 	if p.LocationConstraint == "" {
-		p.LocationConstraint = DefaultLocationConstraint // s3tests_boto3.functional.test_s3:test_bucket_get_location
+		p.LocationConstraint = api.DefaultLocationConstraint // s3tests_boto3.functional.test_s3:test_bucket_get_location
 	}
 	bktInfo := &data.BucketInfo{
 		Name:               p.Name,

cmd/authmate/main.go

@@ -12,7 +12,7 @@ import (
 	"time"
 
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
-	"github.com/nspcc-dev/neofs-s3-gw/api/layer"
+	"github.com/nspcc-dev/neofs-s3-gw/api"
 	"github.com/nspcc-dev/neofs-s3-gw/authmate"
 	"github.com/nspcc-dev/neofs-s3-gw/internal/neofs"
 	"github.com/nspcc-dev/neofs-s3-gw/internal/version"
@@ -323,8 +323,8 @@ func parsePolicies(val string) (authmate.ContainerPolicies, error) {
 	if err = json.Unmarshal(data, &policies); err != nil {
 		return nil, err
 	}
-	if _, ok := policies[layer.DefaultLocationConstraint]; ok {
-		return nil, fmt.Errorf("config overrides %s location constraint", layer.DefaultLocationConstraint)
+	if _, ok := policies[api.DefaultLocationConstraint]; ok {
+		return nil, fmt.Errorf("config overrides %s location constraint", api.DefaultLocationConstraint)
 	}
 
 	return policies, nil