rtpengine-client

A Promises-based nodejs client for accessing rtpengine via ng protocol

Usage

const Client = require('rtpengine-client').Client;
const client = new Client();

client.ping(22222, '39.194.250.246')
  .then((res) => {
    console.log(`received ${JSON.stringify(res)}`); // {result: 'pong'}
  })
  .catch((err) => {
    console.log(`Error: ${err}`);
  });

Constructing a client

client = new Client();  // listen on any port and default address
// or..
client = new Client(9055);    // listen on a specific port
// or..
client = new Client(9055, '192.168.1.10'); // listen on a specific port and address
// or..
client = new Client({port: 9055, host: '192.168.1.10'}); // listen on a specific port and address
// or..
client = new Client({timeout: 1500}); // wait a max of 1500 ms for each command reply, throw error on timeout
// or..
client = new Client({rejectOnFailure: true});
// reject promise on any command if response from rtpengine has error
// default behavior is to resolve with any response from rtpengine, even errors

Websocket support

const client = new Client('ws://<IP>:8080');

client.on('listening', () => {
  client.statistics()
    .then((res) => {
      console.log('received data', res);
    })
    .catch((err) => {
      console.log(`Error: ${err}`);
    });
});

Making requests

The ng request verbs (ping, offer, answer, delete, query, start recording, stop recording, block DTMF, unblock DTMF, block media, unblock media) are available as methods on the client object. The sytax for each is the same:

• the destination of the request comes first, either as port, host or {port, host}
• following that, if any options are required for the request, those come next in an object.

The function call returns a promise that is resolved when the response is received.

Function names are as follows:

ng verb	function name
ping	ping
offer	offer
answer	answer
delete	delete
query	query
start recording	startRecording
stop recording	stopRecording
block DTMF	blockDTMF
unblock DTMF	unblockDTMF
play DTMF	playDTMF
block media	blockMedia
unblock media	unblockMedia
silence media	silenceMedia
unsilence media	unsilenceMedia
start forwarding	startForwarding
stop forwarding	stopForwarding
play media	playMedia
stop media	stopMedia
statistics	statistics
publish	publish
subscribe request	subscribeRequest
subscribe answer	subscribeAnswer
unsubscribe	unsubscribe

For instance

client.offer(22222, '35.195.250.243', {
  'sdp': ..
  'call-id': ..
  'from-tag': ..
})
  .then((res) => {
    console.log(res); // { "result": "ok", "sdp": "v=0\r\no=..." }
  })
  .catch((err) => {

  });

// or..
client.offer({port: 22222, host: '35.195.250.243}, {
  'sdp': ..
  'call-id': ..
  'from-tag': ..
}) // ...etc