SecretsManager.js

/**
 * Reference example for AWS secrete manager https://github.com/awsdocs/aws-doc-sdk-examples/blob/master/javascript/example_code/secrets/secrets_getsecretvalue.js
 * Created wrapper class on reference
 * 
**/

'use strict'

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

class SecretsManager {
    
    /**
     * Uses AWS Secrets Manager to retrieve a secret
     */
    static async getSecret (secretName, region){
        const config = { region : region }
        var secret, decodedBinarySecret;
        let secretsManager = new AWS.SecretsManager(config);
        try {
            let secretValue = await secretsManager.getSecretValue({SecretId: secretName}).promise();
            if ('SecretString' in secretValue) {
                return secret = secretValue.SecretString;
            } else {
                let buff = new Buffer(secretValue.SecretBinary, 'base64');
                return decodedBinarySecret = buff.toString('ascii');
            }
        } catch (err) {
            if (err.code === 'DecryptionFailureException')
                // Secrets Manager can't decrypt the protected secret text using the provided KMS key.
                // Deal with the exception here, and/or rethrow at your discretion.
                throw err;
            else if (err.code === 'InternalServiceErrorException')
                // An error occurred on the server side.
                // Deal with the exception here, and/or rethrow at your discretion.
                throw err;
            else if (err.code === 'InvalidParameterException')
                // You provided an invalid value for a parameter.
                // Deal with the exception here, and/or rethrow at your discretion.
                throw err;
            else if (err.code === 'InvalidRequestException')
                // You provided a parameter value that is not valid for the current state of the resource.
                // Deal with the exception here, and/or rethrow at your discretion.
                throw err;
            else if (err.code === 'ResourceNotFoundException')
                // We can't find the resource that you asked for.
                // Deal with the exception here, and/or rethrow at your discretion.
                throw err;
        }
    }
    
     
    
}
module.exports = SecretsManager;