VoIP-WebRTC

VoIP: WebRTC usage example

Description

By default, Dasha allows you to run your application using telephony. But since this is not always needed, Dasha provides an ability of using WebRTC instead. This allows you to build solutions that use web browsers or mobile applications (instead of telephony) for connecting with user.

This example demonstrates simple browser application that connects to node js http server based on Dasha SDK.

Client

From the user's point of view the application (browser client) looks like a button RUN. When a button is pressed, client send http post request to the server. The request contains conversation input parameters:

• aor - sip uri that is used as an endpoint in our app
• name - name of the user (hardcoded to Peter)

When client is being created, it requests the following data from the http server:

• aor - sip uri that will be used as an endpoint in our app
• sipServerEndpoint - address that will be used for creating sip.js server (establishes voice communications with the app)

Client's aor (sip uri address) should:

1. start with sip:reg
2. to be unique
3. use the domain as the sip server.

In our case the domain should be sip.<server>.dasha.ai where server is one of us,ru.

In this demo aor (sip uri) is constructed as sip:reg-${uuid}@${domain}. The sipServerEndpoint is constructed as wss://${domain}/sip/connect

Server

The server is a simple http server with only two methods:

• get:/sip - get aor and sipServerEndpoint
• post:/call - post conversation inputs and run a call with these parameters

This demo is based on our another demo dasha-browser-webrtc-sipjs.

Installation

1. Setup environment (see doc)
2. Run npm i in a current folder.

Running the demo

1. Login to dasha account via npx dasha account login
2. Make npm i to install dependencies
3. Make npm start to run dasha application on nodejs server and launch a web application that will communicate with the server via rest api
4. Open http://localhost:8000/ and click to Start button for run call

Dialogue example

[server] {
[server]   speaker: 'ai',
[server]   text: 'Hello Peter',
[server]   startTime: 2022-01-24T12:10:58.455Z,     
[server]   endTime: 2022-01-24T12:10:59.256Z        
[server] }
[server] {
[server]   speaker: 'ai',
[server]   text: 'Now i can work into browser by web rtc!',
[server]   startTime: 2022-01-24T12:10:59.258Z,     
[server]   endTime: 2022-01-24T12:11:02.035Z        
[server] }
[server] {
[server]   speaker: 'ai',
[server]   text: "Okay, i can repeat your phrase just for fun. Let's say something!",
[server]   startTime: 2022-01-24T12:11:02.038Z,     
[server]   endTime: 2022-01-24T12:11:05.615Z        
[server] }
[server] {
[server]   speaker: 'human',
[server]   text: 'Something.',
[server]   startTime: 2022-01-24T12:11:13.976Z,     
[server]   endTime: 2022-01-24T12:11:15.098Z        
[server] }
[server] {
[server]   speaker: 'ai',
[server]   text: 'You said',
[server]   startTime: 2022-01-24T12:11:15.102Z,     
[server]   endTime: 2022-01-24T12:11:15.735Z        
[server] }
[server] {
[server]   speaker: 'ai',
[server]   text: 'Something.',
[server]   startTime: 2022-01-24T12:11:15.738Z,     
[server]   endTime: 2022-01-24T12:11:16.336Z        
[server] }