A simple BackBlaze (B2) E3 compatible file uploader (JavaScript)

b2-e3.js

// SEE: https://github.com/yakovkhalinsky/backblaze-b2/issues/118

import {
  S3Client,
  PutObjectCommand,
  // S3ClientConfig,
  // DeleteObjectCommand,
} from "@aws-sdk/client-s3";

const region = process.env.B2_REGION;

const b2Client = new S3Client({
  region,
  endpoint: `https://s3.${region}.backblazeb2.com`,
  maxAttempts: 3,
  credentials: {
    // Must have both read & write permissions on process.env.B2_BUCKET_NAME
    accessKeyId: process.env.B2_ID,
    secretAccessKey: process.env.B2_KEY,
  },
});

export async function send(ContentType="image/jpg", opts /*: PutObjectCommand*/) {
  return b2Client.send(
    // https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-s3/interfaces/putobjectcommandinput.html
    new PutObjectCommand({ ContentType, ...opts })
  );
}