1 files changed, 81 insertions, 0 deletions
diff --git a/src/cdn/util/fileStorage.ts b/src/cdn/util/fileStorage.ts
new file mode 100644
index 00000000..e2118228
--- /dev/null
+++ b/src/cdn/util/fileStorage.ts
@@ -0,0 +1,81 @@
+/*
+ Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+ Copyright (C) 2025 Spacebar and Spacebar Contributors
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { Storage } from ".";
+import fs from "fs";
+import fsp from "fs/promises";
+import { join, dirname } from "path";
+import { Readable } from "stream";
+import ExifTransformer from "exif-be-gone";
+
+// TODO: split stored files into separate folders named after cloned route
+
+function getPath(path: string) {
+ // STORAGE_LOCATION has a default value in start.ts
+ const root = process.env.STORAGE_LOCATION || "../";
+ const filename = join(root, path);
+
+ if (path.indexOf("\0") !== -1 || !filename.startsWith(root)) throw new Error("invalid path");
+ return filename;
+}
+
+export class FileStorage implements Storage {
+ async get(path: string): Promise<Buffer | null> {
+ if (process.env.CDN_LOG_IO) console.log(`[CDN][IO] read file: ${path}`);
+ path = getPath(path);
+ try {
+ return await fsp.readFile(path);
+ } catch (error) {
+ try {
+ const files = fs.readdirSync(path);
+ if (!files.length) return null;
+ return await fsp.readFile(join(path, files[0]));
+ } catch (error) {
+ return null;
+ }
+ }
+ }
+
+ async clone(path: string, newPath: string) {
+ if (process.env.CDN_LOG_IO) console.log(`[CDN][IO] clone file: ${path} -> ${newPath}`);
+ path = getPath(path);
+ newPath = getPath(newPath);
+
+ if (!fs.existsSync(dirname(newPath))) fs.mkdirSync(dirname(newPath), { recursive: true });
+
+ // use reflink if possible, in order to not duplicate files at the block layer...
+ fs.copyFileSync(path, newPath, fs.constants.COPYFILE_FICLONE);
+ }
+
+ async set(path: string, value: Buffer) {
+ if (process.env.CDN_LOG_IO) console.log(`[CDN][IO] write file: ${path}`);
+ path = getPath(path);
+ if (!fs.existsSync(dirname(path))) fs.mkdirSync(dirname(path), { recursive: true });
+
+ const ret = Readable.from(value);
+ const cleaned_file = fs.createWriteStream(path);
+
+ ret.pipe(new ExifTransformer()).pipe(cleaned_file);
+ }
+
+ async delete(path: string) {
+ if (process.env.CDN_LOG_IO) console.log(`[CDN][IO] delete file: ${path}`);
+ //TODO we should delete the parent directory if empty
+ fs.unlinkSync(getPath(path));
+ }
+}
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