electron-builder: blockmap Forbidden - autoUpdater - private S3 bucket

I also had this issue during developing. It’s not a solution but I end up using aws-sdk to download my file if electron-updater found any updated version in my private S3. Note: This will not utilize the blockmap to download the updated app, so it might take a few more seconds to download your app. You will also need to run the installer manually to trigger that update, I did it with child_process.spawn.

First, disable autoDownload:

autoUpdater.autoDownload = false;

import * as AWS from 'aws-sdk';
import fs from 'fs';
import aws4 from 'aws4'

autoUpdater.on('checking-for-update', () => {
    let opts = {
        service: 's3',
        region: s3_region,
        host: s3_host,
        path: latest_yml_path
    };
  
    aws4.sign(opts, {
        accessKeyId,
        secretAccessKey,
        sessionToken
    });
    autoUpdater.requestHeaders = opts.headers
})

autoUpdater.on('update-available', (updateInfo) => {
    AWS.config.update({
        accessKeyId,
        secretAccessKey,
        sessionToken
    });
    const s3 = new AWS.S3();
    const version = this.getVersion(updateInfo.path);
    const params = {
        Bucket: `${your_s3_bucket}`,
        Key: `${path_to_your_file)`
    }
   download(s3, params);
})

and the download looks something like this:

const download = (s3, params) => {
  s3.getObject(params, async (err, data) => {
      if (err) {
          throw new Error(err)
      }
      await fs.promises.writeFile(filePath, data.Body);
      console.info(`${filePath} has been downloaded!`);
      autoUpdater.emit('update-downloaded', filePath);
  });
}

Were you able to find out how to achieve it for a private s3 bucket? It’s still not working for me. @stuartcusackie @develar @mayankvadia @justinwaite ?

Obviously, if bucket is private, electron-updater cannot access it.