Generate a compressed file in RAM and then save it to Amazon S3

I'm currently working on a project where I need to compress text data into a zip file in memory using TypeScript and then upload it to an AWS S3 bucket. The input data is in plain text CSV format.

However, I seem to be encountering an issue where the zip file created in S3 becomes unreadable when downloaded.

Below is the code snippet:

const zip = new AdmZip();
zip.addFile('tmp.txt', Buffer.from(data, 'utf-8'));
const zipData = await zip.toBufferPromise();
try {
  const now = dayjs().format('YYYYMMDDTHHmmss');
  const fileName = `Feedback-${now}`;
  await this._storageService.saveFile(zipData.toString('binary'), 'sprintFeedback', fileName);
typescriptamazon-s3aws-lambdaadm-zip

Answer №1

If you're looking for a quick solution, here it is: Simply send the result of the code snippet below to your S3 bucket to create a properly formatted zip file:

const zipData: Buffer = await zip.toBufferPromise();

const command = new PutObjectCommand({
  Bucket: bucketName,
  Body: zipData,
  Key: fileName,
});

await this._s3Client.send(command);

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