:sparkles: cdn

1 files changed, 40 insertions, 0 deletions

diff --git a/cdn/src/util/FileStorage.ts b/cdn/src/util/FileStorage.ts
new file mode 100644

index 00000000..6e74788f
--- /dev/null
+++ b/cdn/src/util/FileStorage.ts
@@ -0,0 +1,40 @@
+import { Storage } from "./Storage";
+import fs from "fs";
+import fse from "fs-extra";
+import { join, relative, dirname } from "path";
+import "missing-native-js-functions";
+import { Readable } from "stream";
+import ExifTransformer = require("exif-be-gone");
+
+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> {
+		try {
+			return fs.readFileSync(getPath(path));
+		} catch (error) {
+			return null;
+		}
+	}
+
+	async set(path: string, value: any) {
+		path = getPath(path);
+		fse.ensureDirSync(dirname(path));
+
+		value = Readable.from(value);
+		const cleaned_file = fs.createWriteStream(path);
+
+		return value.pipe(new ExifTransformer()).pipe(cleaned_file);
+	}
+
+	async delete(path: string) {
+		fs.unlinkSync(getPath(path));
+	}
+}