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Plivo Scala helper Library

Plivo Scala helper Library is a Scala API for the Plivo framework. It is heavily derived from Dag Liodden's Scwilio library. It is currently under initial development, with only a subset of the Plivo functionality currently supported. The API aims to deliver Plivo functionality using two layers of abstraction:

  1. Basic Plivo methods and RESTXML generation
  2. Higher level "phone devices" where all HTTP and URL plumbing is abstracted away and replace with plain functions

Basic Plivo methods and RESTXML generation

To invoke Plivo methods, get an PlivoClient instance:

import org.plivo._
import org.plivo.restapi._

val server = new URL("http://127.0.0.1:8088/")
val authId = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
val authToken = "YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY"
val plivoClient = PlivoClient(server, authId, authToken)

Then invoke a method, e.g. for dialing a number:

val call =  CallOperation(from = "12125550001",
                          to = "12125551234",
                          gateways = List("sofia/gateway/att/"),
                          answerUrl = new URL("http://example.com/answer.xml"))

plivoClient.execute(call)

To generate some RESTXML, put this in a handler of whatever web framework you are using:

import org.plivo.restxml._

val response = Response(
   Speak("Hi. This is an automated call."),
   Wait(2),
   Play(new URL("http://example.com/cowbell.mp3")))

val stringResponse = RestXml(response).toString

Phone devices

Making stateful Plivo services can be a pain. Using Phone instances, the HTTP plumbing can can be removed completely. This allows for code like this:

import org.plivo._
import org.plivo.restapi._
import org.plivo.restxml._
import org.plivo.uf._

val server = new URL("http://127.0.0.1:8088/")
val authId = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
val authToken = "YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY"
val plivoClient = PlivoClient(server, authId, authToken)

// activate phone instance to receive Plivo callbacks
val port = 8181
val phone = new UnfilteredPhone(port)
phone.activate()

// implicitly convert Scala functions to callback URLs
import phone.URLMaker._

val call = CallOperation(from = "12125550001",
                         to = "12125551234",
                         gateways = List("sofia/gateway/att/"),
                         answerUrl = (call: ActiveCall) => {
                           // via the magic of Scala implicits, this
                           // anonymous function is made in to a callback
                           // URL; freeing developers from HTTP plumbing
                           Response(
                             Speak("Hi. This is an automated call."),
                             Wait(2),
                             Play(new URL("http://example.com/cowbell.mp3")))
                         })

plivoClient.execute(call)

Neat, huh?

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