CODE EXAMPLE FOR JAVASCRIPT

s3.getobject nodejs example

const { GetObjectCommand, S3Client } = require('@aws-sdk/client-s3')
const client = new S3Client() // Pass in opts to S3 if necessary

function getObject (Bucket, Key) {
  return new Promise(async (resolve, reject) => {
    const getObjectCommand = new GetObjectCommand({ Bucket, Key })

    try {
      const response = await client.send(getObjectCommand)
  
      // Store all of data chunks returned from the response data stream 
      // into an array then use Array#join() to use the returned contents as a String
      let responseDataChunks = []

      // Handle an error while streaming the response body
      response.Body.once('error', err => reject(err))
  
      // Attach a 'data' listener to add the chunks of data to our array
      // Each chunk is a Buffer instance
      response.Body.on('data', chunk => responseDataChunks.push(chunk))
  
      // Once the stream has no more data, join the chunks into a string and return the string
      response.Body.once('end', () => resolve(responseDataChunks.join('')))
    } catch (err) {
      // Handle the error or throw
      return reject(err)
    } 
  })
}