Carbon

seedalpha's persistence layer

In order to prevent mutation Seedalpha's infrastructure runs on a read-only filesystem. Carbon's role is to persist services output.

Changelog

2.1.3:

• remove s3-streams

2.1.2:

• update s3-writeable

2.1.1:

• use s3-readable, s3-writeable

2.1.0:

• expose carbon app / lib / standalone
• integration tests
• clean server
• update docs

2.0.2:

• setup npm to use NPM_AUTH
• test coverage
• streaming uploads / downloads

2.0.1:

• ci integration

2.0.0:

• Major API changes
• Standalone use
• Library use

Prerequisites (standalone)

• NPM_AUTH

• AUTH

• PORT

• AMAZON_ACCESS_KEY_ID

• AMAZON_ACCESS_KEY_SECRET

• S3_REGION

• S3_BUCKET or

• DATABASE_URL

Development

  $ git clone [email protected]:seedalpha/carbon.git
  $ cd carbon
  $ npm install
  $ npm test

Usage

# index.js

var Carbon = require('seed-carbon');

// persist in mongodb GridFS

var store = new Carbon({
  adapter: Carbon.MongoAdapter('mongodb://localhost:27017/carbon')
});

// or in AWS S3

var store = new Carobn({
  adapter: Carbon.S3Adapter({
    key: AWS_ACCESS_KEY_ID,
    secret: AWS_ACCESS_KEY_SECRET,
    region: 'ap-southeast-1',
    bucket: 'carbon'
  })
});

// API

store.put({
  filename: 'research.pdf',
  contentType: 'application/pdf',
  stream: fs.createReadStream('./research.pdf')
}, function(error){ });

store.get('research.pdf', function(error, file) {
  file.length
  file.filename
  file.contentType
  file.stream
});

store.remove('research.pdf', function(error) {});

Usage with express

# index.js

var express       = require('express);
var CarbonServer  = require('seed-carbon/server');

var config = {
  auth:   'abcd',
  key:    process.env.AMAZON_ACCESS_KEY_ID,
  secret: process.env.AMAZON_ACCESS_KEY_SECRET,
  region: process.env.S3_REGION,
  bucket: process.env.S3_BUCKET,
  // or
  db:     process.env.DATABASE_URL
};

var carbonServer  = CarbonServer(config);

var app = express();

app.use('/store', carbonServer);

app.listen(process.env.PORT || 5000);

// same as library usage
var store = carbonServer.carbon;

// $ curl -F file=some-file.txt http://127.0.0.1/store/some-file.txt

Standalone usage

$ git clone [email protected]:seedalpha/carbon.git
$ cd carbon

$ npm install

$ export PORT=5000
$ export AUTH=zzz
$ export DEBUG=carbon* # optional

$ # for S3
$ export AWS_ACCESS_KEY_ID=xxx
$ export AWS_ACCESS_KEY_SECRET=yyy
$ export S3_REGION=ap-southeast-1
$ export S3_BUCKET=carbon

$ # or for GridFS
$ export DATABASE_URL=mongodb://localhost:27017/carbon

$ npm start

# in a second shell
$ curl -XPOST -H 'Content-Type: application/pdf' --data-binary @spec/document.pdf http://127.0.0.1:5000/document.pdf
$ curl -F file=@spec/document.pdf http://127.0.0.1:5000/document.pdf
$ open http://127.0.0.1:5000/document.pdf # should open in a reader

Author

Vladimir Popov [email protected]

License

©2014 Seedalpha