cloud-storage

Upload and download files from various providers. The goal of this module is provide a simple file upload and download abstraction allowing for the possibility of switching out the provider at any time without breaking existing code.

Installation

npm install @mediasuite/cloud-storage --save

Usage

require module

const storage = require('@mediasuite/cloud-storage')

setup configuration

const config = {
  adapter: {
    provider: 'amazon',
    keyId: '', // access key id
    key: '', // secret key
    region: '', // amazon region
    container: '' // s3 bucket
  }
}

configuration options

pkgcloud providers

Warning: Currently only actively developing for filesystem and AWS, some features may not be supported for pkgcloud providers.

For pkgcloud providers see pgkcloud storage for most options. In addition use key container to specify which cloud container to upload to. (For amazon this is a bucket)

filesystem provider

{
  adapter: {
    provider: 'filesystem',
    path: '' // path on local filesystem
  }
}

upload a file

storage(config).upload('my-file.png', data)
  .then(() => {
    // do something
  })
  .catch(err => {
    // handle any errors
  })

download a file

storage(config).download('my-file.png')
  .then(fileStream => {
    // do something with fileStream
    // eg. in an express route -> fileStream.pipe(res)
  })
  .catch(err => {
    // handle error
    // eg. in express you might do
    //   res.type('application/json')
    //   res.status(500).send({ errors: err })
  })

download options

By default the download promise will resolve with a stream object. If you would prefer, you can instead get back a full buffer of the file like so:

let promise = storage(config).download('my-file.png', {
  type: 'buffer'
})

Image Processing

Version 0.3.0 adds basic image processing, this feature currently adds thumbnail generation and limiting the size of saved images. See following example:

const options = {
  ContentType: 'image/png', // important only works when specified

  maxSize: 1200,            // maximum size in pixels for x and y

  thumbnails: [             // array of image sizes to be generated
    {
      label: '_small',      // will be appended to filename: my-file_small.png
      height: 200,          // image size to generate, specifying only width or height will maintain aspect ratio
      isThumb: true         // identifier flag for thumbnail, should only be set once
    },
    {
      label: '_medium',
      height: 600
    }
  ]
}
storage(config).upload('my-file.png', data, options)
  .then(response => {
    // response will be an array with an element for each size, see below
  })
  .catch(err => {
    // handle any errors
  })

Example Response

[
  {
    "key": "my-file.png",
    "ContentType": "image/png",
    "width": 1200,
    "height": 800
  },
  {
    "key": "my-file_small.png",
    "ContentType": "image/png",
    "width": 300,
    "height": 200,
    "isThumb": true
  },
  {
    "key": "my-file_medium.png",
    "ContentType": "image/png",
    "width": 900,
    "height": 600
  }
]

Providers

Warning: Currently only actively developing for filesystem and AWS, some features may not be supported for pkgcloud providers.

Supports any providers supported by package cloud. See pgkcloud storage for more details.

• amazon
• azure
• hp
• rackspace
• openstack
• google

In addition supports local filestorage

• filesystem