bonjour

A Bonjour/Zeroconf protocol implementation in pure JavaScript. Publish
services on the local network or discover existing services using
multicast DNS.

Installation

npm install bonjour

Usage

var bonjour = require('bonjour')()

// advertise an HTTP server on port 3000
bonjour.publish({ name: 'My Web Server', type: 'http', port: 3000 })

// browse for all http services
bonjour.find({ type: 'http' }, function (service) {
  console.log('Found an HTTP server:', service)
})

API

Initializing

var bonjour = require('bonjour')([options])

The options are optional and will be used when initializing the
underlying multicast-dns server. For details see the multicast-dns
documentation.

Publishing

var service = bonjour.publish(options)

Publishes a new service.

Options are:

• name (string)
• host (string, optional) - defaults to local hostname
• port (number)
• type (string)
• subtypes (array of strings, optional)
• protocol (string, optional) - udp or tcp (default)
• txt (object, optional) - a key/value object to broadcast as the TXT
  record

IANA maintains a list of official service types and port
numbers.

bonjour.unpublishAll([callback])

Unpublish all services. The optional callback will be called when the
services have been unpublished.

bonjour.destroy()

Destroy the mdns instance. Closes the udp socket.

Browser

var browser = bonjour.find(options[, onup])

Listen for services advertised on the network. An optional callback can
be provided as the 2nd argument and will be added as an event listener
for the up event.

Options (all optional):

• type (string)
• subtypes (array of strings)
• protocol (string) - defaults to tcp
• txt (object) - passed into dns-txt
  module contructor. Set to { binary: true } if you want to keep the TXT records in binary

var browser = bonjour.findOne(options[, callback])

Listen for and call the callback with the first instance of a service
matching the options. If no callback is given, it's expected that
you listen for the up event. The returned browser will automatically
stop it self after the first matching service.

Options are the same as given in the browser.find function.

Event: up

Emitted every time a new service is found that matches the browser.

Event: down

Emitted every time an existing service emmits a goodbye message.

browser.services

An array of services known by the browser to be online.

browser.start()

Start looking for matching services.

browser.stop()

Stop looking for matching services.

browser.update()

Broadcast the query again.

Service

Event: up

Emitted when the service is up.

Event: error

Emitted if an error occurrs while publishing the service.

service.stop([callback])

Unpublish the service. The optional callback will be called when the
service have been unpublished.

service.start()

Publish the service.

service.name

The name of the service, e.g. Apple TV.

service.type

The type of the service, e.g. http.

service.subtypes

An array of subtypes. Note that this property might be null.

service.protocol

The protocol used by the service, e.g. tcp.

service.host

The hostname or ip address where the service resides.

service.port

The port on which the service listens, e.g. 5000.

service.fqdn

The fully qualified domain name of the service. E.g. if given the name
Foo Bar, the type http and the protocol tcp, the service.fqdn
property will be Foo Bar._http._tcp.local.

service.txt

The TXT record advertised by the service (a key/value object). Note that
this property might be null.

service.published

A boolean indicating if the service is currently published.

License

MIT