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FreeSWITCHeR
Copyright (c) 2009 The Rubyists (Jayson Vaughn, Tj Vanderpoel, Michael Fellinger, Kevin Berry)
Distributed under the terms of the MIT License.

ABOUT

A ruby library for interacting with the "FreeSWITCH" (http://www.freeswitch.org) opensource telephony platform

REQUIREMENTS

ruby (>= 1.8)
eventmachine (If you wish to use Outbound and Inbound listener)

USAGE

An Outbound Event Listener Example that reads and returns DTMF input:

Simply just create a subclass of FSR::Listner::Outbound and all new calls/sessions will invoke the "session_initiated" callback method.

NOTE: FSR uses blocks within the 'session_inititated' method to ensure that the next "freeswich command" is not executed until the previous "Freeswitch command" has finished. (Basically a continuation) This is kicked off by "answer do".

#!/usr/bin/ruby require 'fsr' require 'fsr/listener/outbound'

class OutboundDemo < FSR::Listener::Outbound

def session_initiated
  exten = @session.headers[:caller_caller_id_number]
  FSR::Log.info "*** Answering incoming call from #{exten}"

  answer do
    FSR::Log.info "***Reading DTMF from #{exten}"
    read("/home/freeswitch/freeswitch/sounds/music/8000/sweet.wav", 4, 10, "input", 7000) do |read_var|
      FSR::Log.info "***Success, grabbed #{read_var.to_s.strip} from #{exten}"
      # Tell the caller what they entered
      speak("Got the DTMF of: #{read_var.to_s.strip}") do 
        #Hangup the call
        hangup 
      end
    end
  end

end

end

FSR.start_oes! OutboundDemo, :port => 8084, :host => "127.0.0.1"

An Inbound Event Socket Listener example using FreeSWITCHeR's hook system:

#!/usr/bin/ruby require 'fsr' require "fsr/listener/inbound"

class MyEventListener < FSR::Listener::Inbound def before_session # This adds a hook on CHANNEL_CREATE events. You can also create a method to handle the event you're after. See the next example add_event(:CHANNEL_CREATE) { |e| p e }

  # This adds a hook on CHANNEL_HANGUP events with a callback method.
  add_event(:CHANNEL_HANGUP) { |e| channel_hangup(e) }
end

def channel_hangup(event)
  p event
end

def on_event(event)
  # This gets called for _every_ event that's subscribed (through add_event)
  p event
end

end

Start FSR Inbound Listener

FSR.start_ies!(MyEventListener, :host => "localhost", :port => 8021)

A More Advanced Example, Publishing Events To A Web Socket:

class MyWebSocketClient < Struct.new(:reporter, :socket, :channel_id) Channel = EM::Channel.new

def initialize(reporter, socket)
  self.reporter, self.socket = reporter, socket
  socket.onopen(&method(:on_open))
  socket.onmessage(&method(:on_message))
  socket.onclose(&method(:on_close))
end

def on_message(json)
  msg = JSON.parse(json)
  FSR::Log.info "Websocket got #{msg}"
end

def send(msg)
  socket.send(msg.to_json)
end

def on_open
  FSR::Log.info("Subscribed listener")
  self.channel_id = Channel.subscribe { |message| send(message) }
end

def on_close
  Channel.unsubscribe(channel_id)
  FSR::Log.info("Unsubscribed listener")
end

end

Add the Channel to your event listener

class MyEventListener def on_event(event) MyWebSocketClient::Channel << event.content end end

Start Listener within and EM.run

EM.epoll EM.run do server, port = '127.0.0.1', 8021 EventMachine.connect(server, port, MyEventListener, auth: 'MyPassword') do |listener| FSR::Log.info "MyEventListener connected to #{server} on #{port}" EventMachine.start_server('0.0.0.0'), 8080, EventSocket::WebSocket::Connection, {}) do |websocket| MyWebSocketClient.new(listener, websocket) end end end

An Inbound Event Socket Listener example using the on_event callback method instead of hooks:

#!/usr/bin/ruby require 'pp' require 'fsr' require "fsr/listener/inbound"

class IesDemo < FSR::Listener::Inbound

def on_event
  pp event.headers
  pp event.content[:event_name]
end

end

FSR.start_ies!(IesDemo, :host => "localhost", :port => 8021, :auth => "ClueCon")

An example of using FSR::CommandSocket to originate a new call in irb:

irb(main):001:0> require 'fsr' => true

irb(main):002:0> FSR.load_all_commands => [:sofia, :originate]

irb(main):003:0> sock = FSR::CommandSocket.new => #<FSR::CommandSocket:0xb7a89104 @server="127.0.0.1", @socket=#TCPSocket:0xb7a8908c, @port="8021", @auth="ClueCon">

irb(main):007:0> sock.originate(:target => 'sofia/gateway/carlos/8179395222', :endpoint => FSR::App::Bridge.new("user/bougyman")).run => {"Job-UUID"=>"732075a4-7dd5-4258-b124-6284a82a5ae7", "body"=>"", "Content-Type"=>"command/reply", "Reply-Text"=>"+OK Job-UUID: 732075a4-7dd5-4258-b124-6284a82a5ae7"}