How to get response from S3 getObject in Node.js?

To get response from S3 getObject in Node.js, we call the getObject method.

For instance, we write

const AWS = require("aws-sdk");

const s3 = new AWS.S3();

const getObject = async (bucket, objectKey) => {
  try {
    const params = {
      Bucket: bucket,
      Key: objectKey,
    };

    const data = await s3.getObject(params).promise();

    return data.Body.toString("utf-8");
  } catch (e) {
    throw new Error(`Could not retrieve file from S3: ${e.message}`);
  }
};

const myObject = await getObject("my-bucket", "path/to/the/object.txt");

to define the getObject function.

In it we call getObject with the params object that has the Bucket and Key into to get the object.

We call promise to return a promise with the object data.

Then we convert it to a string with data.Body.toString`.