@twilio/voice-sdk
Version:
Twilio's JavaScript Voice SDK
274 lines • 21.1 kB
JavaScript
/**
* @packageDocumentation
* @module Voice
* @internalapi
*/
// @ts-nocheck
import { EventEmitter } from 'events';
import * as C from './constants';
import { GeneralErrors, SignalingErrors } from './errors';
import Log from './log';
import WSTransport from './wstransport';
const PSTREAM_VERSION = '1.6';
// In seconds
const MAX_RECONNECT_TIMEOUT_ALLOWED = 30;
/**
* Constructor for PStream objects.
*
* @exports PStream as Twilio.PStream
* @memberOf Twilio
* @borrows EventEmitter#addListener as #addListener
* @borrows EventEmitter#removeListener as #removeListener
* @borrows EventEmitter#emit as #emit
* @borrows EventEmitter#hasListener as #hasListener
* @constructor
* @param {string} token The Twilio capabilities JWT
* @param {string[]} uris An array of PStream endpoint URIs
* @param {object} [options]
* @config {boolean} [options.backoffMaxMs=20000] Enable debugging
*/
class PStream extends EventEmitter {
constructor(token, uris, options) {
super();
if (!(this instanceof PStream)) {
return new PStream(token, uris, options);
}
const defaults = {
TransportFactory: WSTransport,
};
options = options || {};
for (const prop in defaults) {
if (prop in options) {
continue;
}
options[prop] = defaults[prop];
}
this.options = options;
this.token = token || '';
this.status = 'disconnected';
this.gateway = null;
this.region = null;
this._messageQueue = [];
this._preferredUri = null;
this._uris = uris;
this._handleTransportClose = this._handleTransportClose.bind(this);
this._handleTransportError = this._handleTransportError.bind(this);
this._handleTransportMessage = this._handleTransportMessage.bind(this);
this._handleTransportOpen = this._handleTransportOpen.bind(this);
this._log = new Log('PStream');
// NOTE(mroberts): EventEmitter requires that we catch all errors.
this.on('error', () => {
this._log.warn('Unexpected error handled in pstream');
});
/*
*events used by device
*'invite',
*'ready',
*'error',
*'offline',
*
*'cancel',
*'presence',
*'roster',
*'answer',
*'candidate',
*'hangup'
*/
const self = this;
this.addListener('ready', () => {
self.status = 'ready';
});
this.addListener('offline', () => {
self.status = 'offline';
});
this.addListener('close', () => {
self._log.info('Received "close" from server. Destroying PStream...');
self._destroy();
});
this.transport = new this.options.TransportFactory(this._uris, {
backoffMaxMs: this.options.backoffMaxMs,
maxPreferredDurationMs: this.options.maxPreferredDurationMs,
});
Object.defineProperties(this, {
uri: {
enumerable: true,
get() {
return this.transport.uri;
},
},
});
this.transport.on('close', this._handleTransportClose);
this.transport.on('error', this._handleTransportError);
this.transport.on('message', this._handleTransportMessage);
this.transport.on('open', this._handleTransportOpen);
this.transport.open();
return this;
}
}
PStream.prototype._handleTransportClose = function () {
this.emit('transportClose');
if (this.status !== 'disconnected') {
if (this.status !== 'offline') {
this.emit('offline', this);
}
this.status = 'disconnected';
}
};
PStream.prototype._handleTransportError = function (error) {
if (!error) {
this.emit('error', { error: {
code: 31000,
message: 'Websocket closed without a provided reason',
twilioError: new SignalingErrors.ConnectionDisconnected(),
} });
return;
}
// We receive some errors without call metadata (just the error). We need to convert these
// to be contained within the 'error' field so that these errors match the expected format.
this.emit('error', typeof error.code !== 'undefined' ? { error } : error);
};
PStream.prototype._handleTransportMessage = function (msg) {
if (!msg || !msg.data || typeof msg.data !== 'string') {
return;
}
const { type, payload = {} } = JSON.parse(msg.data);
this.gateway = payload.gateway || this.gateway;
this.region = payload.region || this.region;
if (type === 'error' && payload.error) {
payload.error.twilioError = new SignalingErrors.ConnectionError();
}
this.emit(type, payload);
};
PStream.prototype._handleTransportOpen = function () {
this.status = 'connected';
this.setToken(this.token);
this.emit('transportOpen');
const messages = this._messageQueue.splice(0, this._messageQueue.length);
messages.forEach(message => this._publish(...message));
};
/**
* @return {string}
*/
PStream.toString = () => '[Twilio.PStream class]';
PStream.prototype.toString = () => '[Twilio.PStream instance]';
PStream.prototype.setToken = function (token) {
this._log.info('Setting token and publishing listen');
this.token = token;
let reconnectTimeout = 0;
const t = this.options.maxPreferredDurationMs;
this._log.info(`maxPreferredDurationMs:${t}`);
if (typeof t === 'number' && t >= 0) {
reconnectTimeout = Math.min(Math.ceil(t / 1000), MAX_RECONNECT_TIMEOUT_ALLOWED);
}
this._log.info(`reconnectTimeout:${reconnectTimeout}`);
const payload = {
browserinfo: getBrowserInfo(),
reconnectTimeout,
token,
};
this._publish('listen', payload);
};
PStream.prototype.sendMessage = function (callsid, content, contenttype = 'application/json', messagetype, voiceeventsid) {
const payload = {
callsid,
content,
contenttype,
messagetype,
voiceeventsid,
};
this._publish('message', payload, true);
};
PStream.prototype.register = function (mediaCapabilities) {
const regPayload = { media: mediaCapabilities };
this._publish('register', regPayload, true);
};
PStream.prototype.invite = function (sdp, callsid, params) {
const payload = {
callsid,
sdp,
twilio: params ? { params } : {},
};
this._publish('invite', payload, true);
};
PStream.prototype.reconnect = function (sdp, callsid, reconnect) {
const payload = {
callsid,
reconnect,
sdp,
twilio: {},
};
this._publish('invite', payload, true);
};
PStream.prototype.answer = function (sdp, callsid) {
this._publish('answer', { sdp, callsid }, true);
};
PStream.prototype.dtmf = function (callsid, digits) {
this._publish('dtmf', { callsid, dtmf: digits }, true);
};
PStream.prototype.hangup = function (callsid, message) {
const payload = message ? { callsid, message } : { callsid };
this._publish('hangup', payload, true);
};
PStream.prototype.reject = function (callsid) {
this._publish('reject', { callsid }, true);
};
PStream.prototype.reinvite = function (sdp, callsid) {
this._publish('reinvite', { sdp, callsid }, false);
};
PStream.prototype._destroy = function () {
this.transport.removeListener('close', this._handleTransportClose);
this.transport.removeListener('error', this._handleTransportError);
this.transport.removeListener('message', this._handleTransportMessage);
this.transport.removeListener('open', this._handleTransportOpen);
this.transport.close();
this.emit('offline', this);
};
PStream.prototype.destroy = function () {
this._log.info('PStream.destroy() called...');
this._destroy();
return this;
};
PStream.prototype.updatePreferredURI = function (uri) {
this._preferredUri = uri;
this.transport.updatePreferredURI(uri);
};
PStream.prototype.updateURIs = function (uris) {
this._uris = uris;
this.transport.updateURIs(this._uris);
};
PStream.prototype.publish = function (type, payload) {
return this._publish(type, payload, true);
};
PStream.prototype._publish = function (type, payload, shouldRetry) {
const msg = JSON.stringify({
payload,
type,
version: PSTREAM_VERSION,
});
const isSent = !!this.transport.send(msg);
if (!isSent) {
this.emit('error', { error: {
code: 31009,
message: 'No transport available to send or receive messages',
twilioError: new GeneralErrors.TransportError(),
} });
if (shouldRetry) {
this._messageQueue.push([type, payload, true]);
}
}
};
function getBrowserInfo() {
const nav = typeof navigator !== 'undefined' ? navigator : {};
const info = {
browser: {
platform: nav.platform || 'unknown',
userAgent: nav.userAgent || 'unknown',
},
p: 'browser',
plugin: 'rtc',
v: C.RELEASE_VERSION,
};
return info;
}
export default PStream;
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