s3.getObject().createReadStream() : How to catch the error?

Question

I am trying to write a program to get a zip file from s3, unzip it, then upload it to S3. But I found two exceptions that I can not catch.

1.

Answer 1

You need to listen for the emitted error earlier. Your error handler is only looking for errors during the unzip part.

A simplified version of your script.

s3.getObject(params)
.createReadStream()
.on('error', (e) => {
  // handle aws s3 error from createReadStream
})
.pipe(unzip)
.on('data', (data) => {
  // retrieve data
})
.on('end', () => {
  // stream has ended
})
.on('error', (e) => {
  // handle error from unzip
});

This way, you do not need to make an additional call to AWS to find out if out if it exists.