Alorg Service

Create zeroconf microservices on a local network using http/2 and mDNS, and use a simple REST-like querying syntax.

Installation

yarn add @theoperatore/alorg-service

requirements:

| node | | --------- | | 10.14.2 |

Basic service usage

const alorg = require('@theoperatore/alorg-service');

const serviceName = 'greeting-service';
const service = alorg.createService(serviceName);

// define a route to match GET requests
service.get('/say-hello', (stream, callback) => {
  // log the http2 request headers
  console.log(stream.request.headers);

  // respond with a payload body; no errors
  callback(null, 'hello world');
});

// define a route to match POST requests
service.post('/echo', (stream, callback) => {
  let payload = '';
  stream.setEncoding('utf8');

  stream.on('data', chunk => {
    payload += chunk;
  });

  stream.on('end', () => {
    callback(null, payload);
  });
});

// call this to start listening and broadcasting
service.listen();

The stream object in the handler is the NodeJS ServerHttp2Session so do whatever you need to to parse any payloads or stream any data. All you need to do is invoke callback(null, payload) to end the request stream.

payload can either be a string or an object.

Basic client usage

const alorg = require('@theoperatore/alorg-service');
const client = alorg.createClient();

// make a GET request to the service defined above (greeting-service)
client.get('alorg://greeting-service/say-hello').then(response => {
  console.log(response.payload, response.headers);
});

// POST some data to the /echo endpoint to the service defined above (greeting-service)
client.post('alorg://greeting-service/echo', { does: 'this even work?' }).then(response => {
  console.log(response.payload, response.headers);
});

Currently, there isn't a way to access the underlying stream object on a client request. Something for the future!

License

MIT