From 08736ed61069a5f1634eb1bf721369263199ccc9 Mon Sep 17 00:00:00 2001
From: Hayden Young <hi@hbjy.dev>
Date: Thu, 14 Oct 2021 23:04:03 +0100
Subject: feat: implement an S3-based storage API

---
 cdn/src/util/S3Storage.ts | 53 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 cdn/src/util/S3Storage.ts

(limited to 'cdn/src/util/S3Storage.ts')

diff --git a/cdn/src/util/S3Storage.ts b/cdn/src/util/S3Storage.ts
new file mode 100644
index 00000000..33a6ba39
--- /dev/null
+++ b/cdn/src/util/S3Storage.ts
@@ -0,0 +1,53 @@
+import { S3 } from "@aws-sdk/client-s3";
+import { Readable, Stream } from "stream";
+import { Storage } from "./Storage";
+
+const readableToBuffer = (readable: Readable): Promise<Buffer> =>
+	new Promise((resolve, reject) => {
+		const chunks: Buffer[] = [];
+		readable.on('data', chunk => chunks.push(chunk));
+		readable.on('error', reject);
+		readable.on('end', () => resolve(Buffer.concat(chunks)));
+	});
+
+export class S3Storage implements Storage {
+	public constructor(
+		private client: S3,
+		private basePath: string,
+		private bucket: string
+	) {}
+
+	async set(path: string, data: Buffer): Promise<void> {
+		await this.client.putObject({
+			Bucket: this.bucket,
+			Key: `${this.basePath}${path}`,
+			Body: data
+		});
+	}
+
+	async get(path: string): Promise<Buffer | null> {
+		try {
+			const s3Object = await this.client.getObject({
+				Bucket: this.bucket,
+				Key: `${this.basePath}${path}`
+			});
+
+			if (!s3Object.Body) return null;
+
+			const body = s3Object.Body;
+
+			return await readableToBuffer(<Readable> body);
+		} catch(err) {
+			console.error(`[CDN] Unable to get S3 object at path ${path}.`);
+			console.error(err);
+			return null;
+		}
+	}
+
+	async delete(path: string): Promise<void> {
+		await this.client.deleteObject({
+			Bucket: this.bucket,
+			Key: `${this.basePath}${path}`
+		});
+	}
+}
-- 
cgit 1.5.1