@smcloudstore/aws-s3

This package is a provider for SMCloudStore, for AWS S3. SMCloudStore is a lightweight Node.js module that offers a simple API to interact with the object storage services of multiple cloud providers.

Please refer to the main package for the SMCloudStore documentation and instructions on how to use it.

Provider-specific considerations

There are a few provider-specific considerations for the AwsS3 provider.

Connection argument

When initializing the AwsS3 provider, the connection argument is an object with:

• connection.accessKeyId: string containing the access key ID (the "public key")
• connection.secretAccessKey: string containing the secret access key (the "secret key")
• connection.region (optional): string containing the AWS region to use. List of regions is available on the AWS documentation. Defaults to US Standard (Virginia) if not specified.

Example:

// Require the package
const SMCloudStore = require('smcloudstore')

// Complete with the connection options for AWS S3
const connection = {
    accessKeyId: 'PUBLIC_KEY_HERE',
    secretAccessKey: 'SECRET_KEY_HERE',
    region: 'us-west-1'
}
// Return an instance of the AwsS3Provider class
const storage = SMCloudStore.create('aws-s3', connection)

Creating a container

When using the storage.createContainer(container, [options]) and the storage.ensureContainer(container, [options]) methods, the options argument can be used to define some options for the container:

• options.access (optional): string determining the default ACL for the container. Accepted values are listed below, and please refer to the documentation for more details:
  • 'public-read' (alias 'public' for compatibility with other storage providers)
  • 'public-read-write'
  • 'authenticated-read'
  • 'private' (alias 'none' for compatibility with other storage providers)), this is the default value.

Uploading an object

With the AWS S3 provider, the storage.putObject(container, path, data, [options]) method comes with a few more keys for the options dictionary, in addition to the standard options.metadata key:

• options.access (optional): string determining the ACL for the object. Accepted values are listed below, and please refer to the documentation for more details:
  • 'public-read' (alias 'public' for compatibility with other storage providers)
  • 'public-read-write'
  • 'authenticated-read'
  • 'private' (alias 'none' for compatibility with other storage providers)), this is the default value.
• options.serverSideEncryption (optional): when true, enables AES256 encryption at rest with keys managed by AWS. Default value is false (disabled).
• options.class (optional): string represeting the storage class to use. Please see the documentation](https://docs.aws.amazon.com/AmazonS3/latest/dev/storage-class-intro.html) for details; possible values are:
  • 'STANDARD'
  • 'REDUCED_REDUNDANCY'
  • 'STANDARD_IA'
  • 'ONEZONE_IA'

Using pre-signed URLs

In the method storage.presignedPutUrl(container, path, [options], [ttl]), the AWS S3 provider accepts for the options argument the same dictionary as the 'storage.putObject(container, path, data, [options])' method. If you specify a Content-Type in the request for the presigned URL, for example, clients will need to make PUT requests with the same Content-Type.

Accessing the AWS-SDK

The AWS S3 provider is built on top of the official AWS SDK for JavaScript, which is exposed by calling storage.client().

You can use the object returned by this method to perform low-level operations using the AWS S3 SDK. Note that only the S3 library is loaded, and not the full AWS SDK for JavaScript.