vmol-s3

Moleculer mixin adding s3 access to the local service.

Configuration

Settings can be provided by the service or using enviroment variables.

settings: {
    s3: {
        keyId: process.env.S3_STORAGE_KEYID,
        key: process.env.S3_STORAGE_KEY,
        region: process.env.S3_STORAGE_REGION,
        endpoint: process.env.S3_STORAGE_ENDPOINT,
        container: process.env.S3_STORAGE_CONTAINER,
        delimiter: process.env.S3_STORAGE_DELIMITER
    }
}

Usage

To enable, add the middleware to your services.

const S3Service = require('vmol-s3');

module.exports = {
    name: 'myservice',

    /**
     * Mixins
     */
    mixins: [ S3Service ],
};

API

s3upload(stream, options)

s3uploadFromRequest(req, options)

s3stat(name, options)

s3getStream(name, offset, length, options)

s3getBuffer(name, options)

s3streamToKoa(ctx, name, options)

s3getTag(source, options)

s3move(source, destination, options)

s3copy(source, destination, options)

s3listFiles(names, options)

s3remove(name, options)

s3removeFiles(names, options)

s3addClient(name, options)

s3withStaticUrl(prefix, data, fields)

Advanced configuration

Multiple containers in a single client connection

You may need access to more than one container. In this case, you can specify it in all API methods, inside the options object.

this.s3upload(stream, { container: 'other-container' });

If omitted, the settings.s3.container value will be used.

Multiple client connections

You may need to work with different client connections to different buckets. Behind the scene, the s3 settings will be used to create a specific connection.

You can add a new client connection this way:

// best practice is to add your client in started() moleculer method
started() {
    this.s3addClient('some-name', {
        keyId: process.env.PRIVATE_STORAGE_KEYID,
        key: process.env.PRIVATE_STORAGE_KEY,
        region: process.env.PRIVATE_STORAGE_REGION,
        endpoint: process.env.PRIVATE_STORAGE_ENDPOINT,
        container: process.env.PRIVATE_STORAGE_CONTAINER
    });
}

// upload with the new specific client
this.s3upload(stream, { client: 'some-name' });

// upload with main client using settings.s3
this.s3upload(stream);
// or explicitly
this.s3upload(stream, { client: '' }); // or any falsy value

Mulitple containers in a specific client connection

You can specify both client and container if you have a complex set of connections and containers.

this.s3upload(stream, {
    client: 'some-name',
    container: 'some-container'
});

By default, it is always the container defined in client connection configuration which id used.