Bfg NPM | npm.io

bfg

Big Friendly Gateway creates a read and write stream to various cloud storage providers

installation

$ npm install bfg

usage

bfg will create a WriteStream for uploads and a ReadStream for downloads to cloud storage providers.

Upload a local file to rackspace:

var fs = require('fs');
var bfg = require('bfg');

var disk = bfg.rackspace({
	username:'...',
	apikey:'...',
	region:'LON',
	container:'my'
})

var localfile = fs.createReadStream(__dirname + '/hello.txt');
var remotefile = disk.createWriteStream('/hello.txt');

localfile.on('end', function(){
	console.log('file uploaded!');
})

localfile.pipe(remotefile);

Because bfg is streaming - you can use pipe readstreams to HTTP responses:

var disk = bfg.rackspace(...);

// proxy any request to /filestore to rackspace to serve
app.use('/filestore', function(req, res){
	disk.createReadStream(req.url).pipe(res);
})

bfg will also stream form uploads that contain files - this is useful for file uploads that you want to stream directly to the cloud provider:

var app = express();
var disk = bfg.rackspace(...);

app.use('/filestore', disk.handler());

cli

bfg can be used on the cli if you install it globally:

$ npm install bfg -g

you can then pipe files to and from bfg - the options are configured on the command line:

Usage: bfg [options] [command]

Commands:

  upload                 upload a file
  download               download a file

Options:

  -h, --help               output usage information
  -u, --username [value]   Rackspace Username
  -k, --apikey [value]     Rackspace Api Key
  -r, --region [value]     Rackspace Region
  -c, --container [value]  Rackspace Container
  -f, --folder [value]     Rackspace Folder
  -V, --version            output the version number

These options can also be configured from the envionment variables:

RACKSPACE_USERNAME
RACKSPACE_APIKEY
RACKSPACE_REGION
RACKSPACE_CONTAINER
RACKSPACE_FOLDER
RACKSPACE_CDN

Assuming the environment variables are set - here is an example of streaming a local file to rackspace:

$ cat helloworld.txt | bfg upload /helloworld.txt

And streaming from rackspace to a local file:

$ bfg download /helloworld.txt > helloworld.txt

api

var disk = bfg.rackspace({options:...})

Create a new disk from one of the cloud providers bfg supports. The options vary depending on provider:

rackspace

username - the rackspace username
apikey - the rackspace apikey
region - the region in which your containers live (e.g. LON)
container - the name of the container to connect to

var rs = disk.createReadStream(filepath)

Create a ReadStream from the contents of the remote filepath

var disk = bfg.rackspace(...);

disk.createReadStream('/hello.txt').pipe(fs.createWriteStream(__dirname + '/hello.txt'));

var ws = disk.createWriteStream(filepath)

Create a WriteStream for the remote filepath

var disk = bfg.rackspace(...);

fs.createReadStream(__dirname + '/hello.txt').pipe(disk.createWriteStream('/hello.txt'));

var handler = disk.handler()

Create a HTTP handler that will GET or POST requests via the appropriate stream

var app = express();
var disk = bfg.rackspace(...);

app.use('/filestore', disk.handler());

CDN

You can instruct bfg to redirect GET requests to the CDN for the container.

First you must pass the cdn option when you make a disk.

Second pass true to the handler function to get a handler that will redirect rather than stream directly:

var disk = bfg.rackspace({
  username:...,
  etc:...,
  cdn:'https://bf9164d97a0cd15823f4-4dba8edb0fc2b3e5cc0f769b1eea32ba.ssl.cf3.rackcdn.com'
})

app.use('/filestore', disk.handler(true));

var folder = disk.folder(basepath)

Return a new disk that will save and load files relative to the given basepath

This is useful for partitioning a container for serveral projects.

var app = express();
var disk = bfg.rackspace(...);
var folder = disk.folder('/subfolder')

fs.createReadStream(__dirname + '/hello.txt').pipe(disk.createWriteStream('/hello.txt'));

The file is saved to '/subfolder/hello.txt'