fix: add option to disable asset storage (#1878)

* fix: add no storage option

* improve error handling

internal/static/config/config.go

@@ -1,8 +1,13 @@
 package config
 
 import (
+	"context"
 	"encoding/json"
+	"io"
+	"net/url"
+	"time"
 
+	"github.com/caos/zitadel/internal/domain"
 	"github.com/caos/zitadel/internal/errors"
 	"github.com/caos/zitadel/internal/static"
 	"github.com/caos/zitadel/internal/static/s3"
@@ -14,7 +19,9 @@ type AssetStorageConfig struct {
 }
 
 var storage = map[string]func() static.Config{
-	"s3": func() static.Config { return &s3.Config{} },
+	"s3":   func() static.Config { return &s3.Config{} },
+	"none": func() static.Config { return &NoStorage{} },
+	"":     func() static.Config { return &NoStorage{} },
 }
 
 func (c *AssetStorageConfig) UnmarshalJSON(data []byte) error {
@@ -55,3 +62,53 @@ func newStorageConfig(storageType string, configData []byte) (static.Config, err
 
 	return staticConfig, nil
 }
+
+var (
+	errNoStorage = errors.ThrowInternal(nil, "STATIC-ashg4", "Errors.Assets.Store.NotConfigured")
+)
+
+type NoStorage struct{}
+
+func (_ *NoStorage) NewStorage() (static.Storage, error) {
+	return &NoStorage{}, nil
+}
+
+func (_ *NoStorage) CreateBucket(ctx context.Context, name, location string) error {
+	return errNoStorage
+}
+
+func (_ *NoStorage) RemoveBucket(ctx context.Context, name string) error {
+	return errNoStorage
+}
+
+func (_ *NoStorage) ListBuckets(ctx context.Context) ([]*domain.BucketInfo, error) {
+	return nil, errNoStorage
+}
+
+func (_ *NoStorage) PutObject(ctx context.Context, bucketName, objectName, contentType string, object io.Reader, objectSize int64, createBucketIfNotExisting bool) (*domain.AssetInfo, error) {
+	return nil, errNoStorage
+}
+
+func (_ *NoStorage) GetObjectInfo(ctx context.Context, bucketName, objectName string) (*domain.AssetInfo, error) {
+	return nil, errNoStorage
+}
+
+func (_ *NoStorage) GetObject(ctx context.Context, bucketName, objectName string) (io.Reader, func() (*domain.AssetInfo, error), error) {
+	return nil, nil, errNoStorage
+}
+
+func (_ *NoStorage) ListObjectInfos(ctx context.Context, bucketName, prefix string, recursive bool) ([]*domain.AssetInfo, error) {
+	return nil, errNoStorage
+}
+
+func (_ *NoStorage) GetObjectPresignedURL(ctx context.Context, bucketName, objectName string, expiration time.Duration) (*url.URL, error) {
+	return nil, errNoStorage
+}
+
+func (_ *NoStorage) RemoveObject(ctx context.Context, bucketName, objectName string) error {
+	return errNoStorage
+}
+
+func (_ *NoStorage) RemoveObjects(ctx context.Context, bucketName, path string, recursive bool) error {
+	return errNoStorage
+}