Sometimes, we want to get contents of a text file from AWS S3 using a Lambda function with JavaScript.
In this article, we’ll look at how to get contents of a text file from AWS S3 using a Lambda function with JavaScript.
How to get contents of a text file from AWS S3 using a Lambda function with JavaScript?
To get contents of a text file from AWS S3 using a Lambda function with JavaScript, we use the getObject method.
For instance, we write
const AWS = require("aws-sdk");
const s3 = new AWS.S3();
const handler = async (event, context) => {
const Bucket = event.Records[0].s3.bucket.name;
const Key = decodeURIComponent(
event.Records[0].s3.object.key.replace(/\+/g, " ")
);
const data = await s3.getObject({ Bucket, Key }).promise();
console.log(data.Body.toString("ascii"));
};
to define the handler function.
In it, we get the Bucket1 and Key values from event.Records[0].
We replace the key’s slashes with spaces.
Then we call getObject to get the file by the Bucket and Key.
And then we get the file contents as a string with data.Body.toString.
Conclusion
To get contents of a text file from AWS S3 using a Lambda function with JavaScript, we use the getObject method.
