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Storj Service Middleware

Common Express middleware for various Storj services.

$ npm install storj-service-middleware --save

var Storage = require('storj-service-storage-models');
var db = new Storage({ /* config */ });
var middleware = require('storj-service-middleware');
var app = require('express')();
 
app.use(middleware.authenticate(db));
app.use(middleware.errorhandler());

Rate Limiter

Instantiate the rate limiter with a redis client client and your express app app

const app = express();
const client = require('redis').createClient();
const limiter = middleware.rateLimiter(client);

Then, you can use limiter as middleware and pass it an options object.

app.get('/route', limiter({
  lookup: function(req) {
    return [req.user._id, req.connection.remoteAddress]
  },
  onRateLimited: function(req, res, next) {
    log.info('user rate limited', req.user);
    return next(new errors.BadRequestError('Slow down, dude.'));
  },
  total: 150,
  expire: 1000 * 60 // 150 requests a minute allowed
  }), function(req, res) {
  res.status(200).send('hello');
});

Testing

Redis must be running for the tests to work. The easiest way to get an instance running is via Docker.

$ docker run --name redis -p 6379:6379 -d redis

Then, npm test will kick off the test suite for you.

License

Credit for much of the rate limiter code goes to https://github.com/juliendangers/express-limiter2 released under the MIT license.

All other code released under AGPLv3.