Tropo Web API Ruby Library

A Ruby library for interaction with the Tropo Web API (http://tropo.com) using JSON.

Tropo Web API Overview

The Tropo Remote API provides a RESTful JSON API for controlling realtime communications applications from your own web servers.

Requirements

• Unit tests passed on: Ruby MRI v1.8.6/1.8.7/1.9.3/2.1.0 and JRuby v1.5.0/v1.7.9
• RubyGems

Note: If using with ActiveSupport, v2.3.5 or better of ActiveSupport is required.

Installation

Optional, if you would like to use with Sinatra:

$ sudo gem install sinatra

Generate Documentation

Developer

$ gemserver

Project Developer

$ sudo gem install yard

From within the project:

$ yardoc

Usage

  require 'rubygems'
  require 'tropo-webapi-ruby'

  # Will return the properly formatted JSON to pass to Tropo
  response = Tropo::Generator.ask({ :say => 'Hello world!' })

  # Will return a Ruby Hash, with some transformations, from the JSON string received from Tropo
  response = Tropo::Generator.parse(json_string)

  # Will provide instance variables that will allow you to easily reference session type
  tropo = Tropo::Generator.new
  response = tropo.parse(json_string)
  p 'Hey, this is a voice session!' if tropo.voice_session
  p 'Hey, this is a text messaging session!' if tropo.text_session

Examples

Sinatra

Using the great RESTful Web Services framework Sinatra for Ruby.

Hello World

  require 'rubygems'
  require 'sinatra'
  require 'tropo-webapi-ruby'

  post '/helloworld.json' do
    Tropo::Generator.say 'Hello World!'
  end

  post '/helloworld_block.json' do
    tropo = Tropo::Generator.new do
      say 'Hello World!'
    end
    tropo.response
  end

  post '/helloworld_twice.json' do
    tropo = Tropo::Generator.new
    tropo.say 'Hello World!'
    tropo.say 'Hello again.'
    tropo.response
  end

Getting Session Information

  # Produces a Ruby hash:
  #
  # { :session => 
  #   { :timestamp    => Tue Jan 19 18:27:46 -0500 2010, 
  #     :user_type    =>"HUMAN", 
  #     :initial_text => nil,
  #     :account_id   =>"0", 
  #     :headers      => [{ "value" => "70", "key"=>"Max-Forwards" }, 
  #                       { "value" => "385", "key"=>"Content-Length" }, 
  #                       { "value" => "<sip:127.0.0.1:49152>", "key"=>"Contact" }, 
  #                       { "value" => "replaces", "key"=>"Supported" }, 
  #                       { "value" => "<sip:sample.json@localhost:5555>", "key"=>"To" }, 
  #                       { "value" => "1 INVITE", "key"=>"CSeq" }, 
  #                       { "value" => "SJphone-M/1.65.382f (SJ Labs)", "key"=>"User-Agent" }, 
  #                       { "value" => "SIP/2.0/UDP 127.0.0.1:49152;branch=z9000000a9;rport=49152", "key"=>"Via" }, 
  #                       { "value" => "3FA7C70A1DD211B286B7A583D7B46DDD0xac106207", "key"=>"Call-ID" }, 
  #                       { "value" => "application/sdp", "key"=>"Content-Type" }, 
  #                       { "value" => "unknown <sip:127.0.0.1:49152>;tag=750b1b1648e9c876", "key"=>"From" }],
  #     :id            => "3FA7C70A1DD211B286B7A583D7B46DDD0xac106207", 
  #     :to            => { :network => "PSTN", 
  #                         :channel => "VOICE", 
  #                         :name    => "unknown", 
  #                         :id      => "sample.json"}, 
  #     :from          => { :network => "PSTN", 
  #                         :channel => "VOICE", 
  #                         :name    => "unknown", 
  #                         :id      => "unknown"}}}
  #
  post '/start_session.json' do
    tropo_session = Tropo::Generator.parse request.env["rack.input"].read
    p tropo_session
  end

Asking for input and receiving the response, or catching a hangup

  post '/ask.json' do
    tropo = Tropo::Generator.new do
              on :event => 'hangup', :next => '/hangup.json'
              on :event => 'continue', :next => '/answer.json'
              ask({ :name    => 'account_number', 
                    :bargein => true, 
                    :timeout => 30,
                    :require => 'true' }) do
                      say     :value => 'Please say your account number'
                      choices :value => '[5 DIGITS]'
                    end
              end
    tropo.response
  end

  # Produces a Ruby hash, if the user gives a response before hanging up:
  #
  # { :result => 
  #   { :actions          => { :attempts       => 1, 
  #                            :disposition    => "SUCCESS", 
  #                            :interpretation => "12345", 
  #                            :confidence     => 100, 
  #                            :name           => "account_number", 
  #                            :utterance      => "1 2 3 4 5" }, 
  #     :session_duration => 3, 
  #     :error            => nil, 
  #     :sequence         => 1, 
  #     :session_id       => "[email protected]", 
  #     :state            => "ANSWERED", 
  #     :complete         => true } }
  #
  post '/answer.json' do
    tropo_event = Tropo::Generator.parse request.env["rack.input"].read
    p tropo_event
  end

  # Produces a Ruby hash, if the user hangs up before giving a reponse
  # { :result => 
  #   { :actions          => {}, 
  #     :session_duration => 1, 
  #     :error            => nil, 
  #     :sequence         => 1, 
  #     :session_id       => "[email protected]", 
  #     :state            => "DISCONNECTED", 
  #     :complete         => true } }
  #
  post '/hangup.json' do
    tropo_event = Tropo::Generator.parse request.env["rack.input"].read
    p tropo_event
  end

Redirect a call before answering

  # A redirect method
  post '/redirect.json' do
    Tropo::Generator.redirect({ :to => 'sip:1234', :from => '4155551212' })
  end

Reject a call before answering

  # A reject method
  post '/reject.json' do
    Tropo::Generator.reject
  end

Setting a default voice for speech synthesis (text-to-speech/TTS)

  post '/speak.json' do
    t = Tropo::Generator.new(:voice => 'kate')
    t.say 'Hello!' # Will speak as kate now
    
    # or

    t = Tropo::Generator.new
    t.voice = 'kate'
    t.say 'Hello!' # Will speak as kate now
  end

Setting a default recognizer for speech recognition (ASR)

  post '/ask.json' do
    t = Tropo::Generator.new(:recognizer => 'fr-fr')
    t.ask({ :name    => 'account_number', # Will now use the French speech recognition engine
            :bargein => true, 
            :timeout => 30,
            :require => 'true' }) do
              say     :value => "S'il vous plaît dire votre numéro de compte", :voice => 'florence'
              choices :value => '[5 DIGITS]'
            end

    # or

    t = Tropo::Generator.new
    t.recognizer = 'fr-fr'
    t.ask({ :name    => 'account_number', # Will now use the French speech recognition engine
            :bargein => true, 
            :timeout => 30,
            :require => 'true' }) do
              say     :value => "S'il vous plaît dire votre numéro de compte", :voice => 'florence'
              choices :value => '[5 DIGITS]'
            end
  end

Additional Examples

May be found by checking out the project from Github, and then looking in $PROJECT_HOME/examples and $PROJECT_HOME/spec/tropo-webapi-ruby_spec.rb.

Documentation

• API Documentation:

http://voxeo.github.com/tropo-webapi-ruby

• Tropo Web API Documentation

http://docs.tropo.com/webapi/2.0/home.htm

Notes

In order to maintain compatibility between Ruby MRI and JRuby the gem requires 'json_pure'. If you are using the Ruby MRI and would prefer to use the C version of 'json', simply install the 'json' gem as follows:

sudo gem install json

Copyright

Copyright (c) 2014 Tropo, Inc. See LICENSE for details.