1 files changed, 50 insertions, 0 deletions
diff --git a/src/cdn/util/FileStorage.ts b/src/cdn/util/FileStorage.ts
new file mode 100644
index 00000000..955c570b
--- /dev/null
+++ b/src/cdn/util/FileStorage.ts
@@ -0,0 +1,50 @@
+import { Storage } from "./Storage";
+import fs from "fs";
+import { join, relative, dirname } from "path";
+import "missing-native-js-functions";
+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 || "../";
+	var 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> {
+		path = getPath(path);
+		try {
+			return fs.readFileSync(path);
+		} catch (error) {
+			try {
+				const files = fs.readdirSync(path);
+				if (!files.length) return null;
+				return fs.readFileSync(join(path, files[0]));
+			} catch (error) {
+				return null;
+			}
+		}
+	}
+
+	async set(path: string, value: any) {
+		path = getPath(path);
+		if (!fs.existsSync(dirname(path))) fs.mkdirSync(dirname(path));
+
+		value = Readable.from(value);
+		const cleaned_file = fs.createWriteStream(path);
+
+		return value.pipe(new ExifTransformer()).pipe(cleaned_file);
+	}
+
+	async delete(path: string) {
+		//TODO we should delete the parent directory if empty
+		fs.unlinkSync(getPath(path));
+	}
+}