61 lines
1.4 KiB
TypeScript
61 lines
1.4 KiB
TypeScript
import { S3 } from "@aws-sdk/client-s3";
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import { Readable } from "stream";
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import { Storage } from "./Storage";
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const readableToBuffer = (readable: Readable): Promise<Buffer> =>
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new Promise((resolve, reject) => {
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const chunks: Buffer[] = [];
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readable.on('data', chunk => chunks.push(chunk));
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readable.on('error', reject);
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readable.on('end', () => resolve(Buffer.concat(chunks)));
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});
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export class S3Storage implements Storage {
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public constructor(
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private client: S3,
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private bucket: string,
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private basePath?: string,
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) {}
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/**
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* Always return a string, to ensure consistency.
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*/
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get bucketBasePath() {
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return this.basePath ?? '';
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}
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async set(path: string, data: Buffer): Promise<void> {
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await this.client.putObject({
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Bucket: this.bucket,
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Key: `${this.bucketBasePath}${path}`,
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Body: data
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});
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}
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async get(path: string): Promise<Buffer | null> {
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try {
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const s3Object = await this.client.getObject({
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Bucket: this.bucket,
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Key: `${this.bucketBasePath ?? ''}${path}`
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});
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if (!s3Object.Body) return null;
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const body = s3Object.Body;
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return await readableToBuffer(<Readable> body);
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} catch(err) {
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console.error(`[CDN] Unable to get S3 object at path ${path}.`);
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console.error(err);
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return null;
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}
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}
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async delete(path: string): Promise<void> {
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await this.client.deleteObject({
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Bucket: this.bucket,
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Key: `${this.bucketBasePath}${path}`
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});
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}
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}
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