1 files changed, 75 insertions, 0 deletions
diff --git a/modules/packages/content_store.go b/modules/packages/content_store.go
new file mode 100644
index 0000000..da93e6c
--- /dev/null
+++ b/modules/packages/content_store.go
@@ -0,0 +1,75 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+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"
+)
+
+// BlobHash256Key is the key to address a blob content
+type BlobHash256Key string
+
+// ContentStore is a wrapper around ObjectStorage
+type ContentStore struct {
+	store storage.ObjectStorage
+}
+
+// NewContentStore creates the default package store
+func NewContentStore() *ContentStore {
+	contentStore := &ContentStore{storage.Packages}
+	return contentStore
+}
+
+// Get gets a package blob
+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 {
+	_, err := s.store.Stat(KeyToRelativePath(key))
+	return err
+}
+
+// Save stores a package blob
+func (s *ContentStore) Save(key BlobHash256Key, r io.Reader, size int64) error {
+	_, err := s.store.Save(KeyToRelativePath(key), r, size)
+	return err
+}
+
+// Delete deletes a package blob
+func (s *ContentStore) Delete(key BlobHash256Key) error {
+	return s.store.Delete(KeyToRelativePath(key))
+}
+
+// KeyToRelativePath converts the sha256 key aabb000000... to aa/bb/aabb000000...
+func KeyToRelativePath(key BlobHash256Key) string {
+	return path.Join(string(key)[0:2], string(key)[2:4], string(key))
+}
+
+// RelativePathToKey converts a relative path aa/bb/aabb000000... to the sha256 key aabb000000...
+func RelativePathToKey(relativePath string) (BlobHash256Key, error) {
+	parts := strings.SplitN(relativePath, "/", 3)
+	if len(parts) != 3 || len(parts[0]) != 2 || len(parts[1]) != 2 || len(parts[2]) < 4 || parts[0]+parts[1] != parts[2][0:4] {
+		return "", util.ErrInvalidArgument
+	}
+
+	return BlobHash256Key(parts[2]), nil
+}