onsip / Sip.js
Licence: mit
A simple, intuitive, and powerful JavaScript signaling library
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SIP Library for JavaScript
- Create real-time peer-to-peer audio and video sessions via WebRTC
- Utilize SIP in your web application via SIP over WebSocket
- Send instant messages and view presence
- Support early media, hold and transfers
- Send DTMF RFC 2833 or SIP INFO
- Share your screen or desktop
- Written in TypeScript
- Runs in all major web browsers
- Compatible with standards compliant servers including Asterisk and FreeSWITCH
Demo
Want see it in action? The project website, sipjs.com, has a live demo.
Looking for code to get started with? This repository includes demonstrations which run in a web browser.
Usage
To place a SIP call, either utilize the SimpleUser
class...
import { Web } from "sip.js";
// Helper function to get an HTML audio element
function getAudioElement(id: string): HTMLAudioElement {
const el = document.getElementById(id);
if (!(el instanceof HTMLAudioElement)) {
throw new Error(`Element "${id}" not found or not an audio element.`);
}
return el;
}
// Options for SimpleUser
const options: Web.SimpleUserOptions = {
aor: "sip:[email protected]", // caller
media: {
constraints: { audio: true, video: false }, // audio only call
remote: { audio: getAudioElement("remoteAudio") } // play remote audio
}
};
// WebSocket server to connect with
const server = "wss://sip.example.com";
// Construct a SimpleUser instance
const simpleUser = new Web.SimpleUser(server, options);
// Connect to server and place call
simpleUser.connect()
.then(() => simpleUser.call("sip:[email protected]"))
.catch((error: Error) => {
// Call failed
});
Or, alternatively, use the full API framework...
import { Inviter, SessionState, UserAgent } from "sip.js";
// Create user agent instance (caller)
const userAgent = new UserAgent({
uri: UserAgent.makeURI("sip:[email protected]"),
transportOptions: {
server: "wss://sip.example.com"
},
});
// Connect the user agent
userAgent.start().then(() => {
// Set target destination (callee)
const target = UserAgent.makeURI("sip:[email protected]");
if (!target) {
throw new Error("Failed to create target URI.");
}
// Create a user agent client to establish a session
const inviter = new Inviter(userAgent, target, {
sessionDescriptionHandlerOptions: {
constraints: { audio: true, video: false }
}
});
// Handle outgoing session state changes
inviter.stateChange.addListener((newState) => {
switch (newState) {
case SessionState.Establishing:
// Session is establishing
break;
case SessionState.Established:
// Session has been established
break;
case SessionState.Terminated:
// Session has terminated
break;
default:
break;
}
});
// Send initial INVITE request
inviter.invite()
.then(() => {
// INVITE sent
})
.catch((error: Error) => {
// INVITE did not send
});
});
Installation
Node module
npm install sip.js
UMD bundle
- Download sipjs.com/download
- CDN jsDelivr.com
Building, Development and Testing
Clone this repository, then...
npm install
npm run build-and-test
For more info please see the Documentation.
Support
- For migration guides and API reference please see the Documentation.
- For bug reports and feature requests please open a GitHub Issue.
- For questions or usage problems please use the Google Group.
- For more information see the project website at SIPjs.com.
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