Add direct serving of package content (#25543)

Fixes #24723

Direct serving of content aka HTTP redirect is not mentioned in any of
the package registry specs but lots of official registries do that so it
should be supported by the usual clients.

modules/packages/content_store.go

@@ -5,9 +5,11 @@ package packages
 
 import (
 	"io"
+	"net/url"
 	"path"
 	"strings"
 
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/storage"
 	"code.gitea.io/gitea/modules/util"
 )
@@ -31,6 +33,14 @@ func (s *ContentStore) Get(key BlobHash256Key) (storage.Object, error) {
 	return s.store.Open(KeyToRelativePath(key))
 }
 
+func (s *ContentStore) ShouldServeDirect() bool {
+	return setting.Packages.Storage.MinioConfig.ServeDirect
+}
+
+func (s *ContentStore) GetServeDirectURL(key BlobHash256Key, filename string) (*url.URL, error) {
+	return s.store.URL(KeyToRelativePath(key), filename)
+}
+
 // FIXME: Workaround to be removed in v1.20
 // https://github.com/go-gitea/gitea/issues/19586
 func (s *ContentStore) Has(key BlobHash256Key) error {