AWS Lambda to index S3 new files in CloudSearch

docIndexer_snippet1.js

exports.handler = (event, context, callback) => {
    
    // WARNING :
    // This snippet assumes : event.Records[0].eventName == 'ObjectCreated:Put'
    // but the ful code deals with both 'ObjectCreated:Put' and 'ObjectRemoved:Delete'
    
    var filename = event.Records[0].s3.object.key;
    var bucketname = event.Records[0].s3.bucket.name;
    
    var params = {
        Bucket: bucketname,
        Key: filename,
        RequestPayer: 'requester',
    };
    var s3 = new AWS.S3();
    s3.getObject(params, function (err, data) {
        if (err) {
            console.log('file was not found : ERROR');
        }
        else {
            var contentText = data.Body.toString('utf8');
            addToIndex(bucketname, filename, contentText, context);
        }
    });
};