import Logger from './Logger'
import config from './config'
import Diagnostics from './utils/Diagnostics'
import FetchError from './utils/FetchError'
const logger = Logger.get('Director')
const streamTypes = {
WEBRTC: 'WebRtc',
RTMP: 'Rtmp'
}
let liveWebsocketDomain = ''
export const defaultApiEndpoint = config.MILLICAST_DIRECTOR_ENDPOINT
let apiEndpoint = defaultApiEndpoint
/**
* @module Director
* @description Simplify API calls to find the best server and region to publish and subscribe to.
* For security reasons all calls will return a [JWT](https://jwt.io) token for authentication including the required
* socket path to connect with.
*
* You will need your own Publishing token and Stream name, please refer to [Managing Your Tokens](https://docs.dolby.io/streaming-apis/docs/managing-your-tokens).
*/
/**
* @typedef {Object} MillicastDirectorResponse
* @global
* @property {Array<String>} urls - WebSocket available URLs.
* @property {String} jwt - Access token for signaling initialization.
* @property {Array<RTCIceServer>} iceServers - Object which represents a list of Ice servers.
*/
/**
* @typedef {Object} DirectorPublisherOptions
* @global
* @property {String} token - Millicast Publishing Token.
* @property {String} streamName - Millicast Stream Name.
* @property {("WebRtc" | "Rtmp")} [streamType] - Millicast Stream Type.
*/
/**
* @typedef {Object} DirectorSubscriberOptions
* @global
* @property {String} streamName - Millicast publisher Stream Name.
* @property {String} streamAccountId - Millicast Account ID.
* @property {String} [subscriberToken] - Token to subscribe to secure streams. If you are subscribing to an unsecure stream, you can omit this param.
*/
const Director = {
/**
* @function
* @name setEndpoint
* @description Set Director API endpoint where requests will be sent.
* @param {String} url - New Director API endpoint
* @returns {void}
*/
setEndpoint: (url) => {
apiEndpoint = url.replace(/\/$/, '')
},
/**
* @function
* @name getEndpoint
* @description Get current Director API endpoint where requests will be sent. Default endpoint is 'https://director.millicast.com'.
* @returns {String} API base url
*/
getEndpoint: () => {
return apiEndpoint
},
/**
* @function
* @name setLiveDomain
* @description Set Websocket Live domain from Director API response.
* If it is set to empty, it will not parse the response.
* @param {String} domain - New Websocket Live domain
* @returns {void}
*/
setLiveDomain: (domain) => {
liveWebsocketDomain = domain.replace(/\/$/, '')
},
/**
* @function
* @name getLiveDomain
* @description Get current Websocket Live domain.
* By default is empty which corresponds to not parse the Director response.
* @returns {String} Websocket Live domain
*/
getLiveDomain: () => {
return liveWebsocketDomain
},
/**
* @function
* @name getPublisher
* @description Get publisher connection data.
* @param {DirectorPublisherOptions} options - Millicast options.
* @returns {Promise<MillicastDirectorResponse>} Promise object which represents the result of getting the publishing connection path.
* @example const response = await Director.getPublisher(options)
* @example
* import { Publish, Director } from '@millicast/sdk'
*
* //Define getPublisher as callback for Publish
* const streamName = "My Millicast Stream Name"
* const token = "My Millicast publishing token"
* const tokenGenerator = () => Director.getPublisher({token, streamName})
*
* //Create a new instance
* const millicastPublish = new Publish(streamName, tokenGenerator)
*
* //Get MediaStream
* const mediaStream = getYourMediaStreamImplementation()
*
* //Options
* const broadcastOptions = {
* mediaStream: mediaStream
* }
*
* //Start broadcast
* await millicastPublish.connect(broadcastOptions)
*/
getPublisher: async (options, streamName = null, streamType = streamTypes.WEBRTC) => {
const optionsParsed = getPublisherOptions(options, streamName, streamType)
logger.info('Getting publisher connection path for stream name: ', optionsParsed.streamName)
const payload = { streamName: optionsParsed.streamName, streamType: optionsParsed.streamType }
const headers = { 'Content-Type': 'application/json', Authorization: `Bearer ${optionsParsed.token}` }
const url = `${Director.getEndpoint()}/api/director/publish`
try {
const response = await fetch(url, { method: 'POST', headers, body: JSON.stringify(payload) })
let data = await response.json()
if (data.status === 'fail') {
const error = new FetchError(data.data.message, response.status)
throw error
}
data = parseIncomingDirectorResponse(data)
logger.debug('Getting publisher response: ', data)
return data.data
} catch (e) {
logger.error('Error while getting publisher connection path. ', e)
throw e
}
},
/**
* @function
* @name getSubscriber
* @description Get subscriber connection data.
* @param {DirectorSubscriberOptions} options - Millicast options.
* @returns {Promise<MillicastDirectorResponse>} Promise object which represents the result of getting the subscribe connection data.
* @example const response = await Director.getSubscriber(options)
* @example
* import { View, Director } from '@millicast/sdk'
*
* //Define getSubscriber as callback for Subscribe
* const streamName = "My Millicast Stream Name"
* const accountId = "Millicast Publisher account Id"
* const tokenGenerator = () => Director.getSubscriber({streamName, accountId})
* //... or for an secure stream
* const tokenGenerator = () => Director.getSubscriber({streamName, accountId, subscriberToken: '176949b9e57de248d37edcff1689a84a047370ddc3f0dd960939ad1021e0b744'})
*
* //Create a new instance
* const millicastView = new View(streamName, tokenGenerator)
*
* //Set track event handler to receive streams from Publisher.
* millicastView.on('track', (event) => {
* addStreamToYourVideoTag(event.streams[0])
* })
*
* //View Options
* const options = {
* }
*
* //Start connection to broadcast
* await millicastView.connect(options)
*/
getSubscriber: async (options, streamAccountId = null, subscriberToken = null) => {
const optionsParsed = getSubscriberOptions(options, streamAccountId, subscriberToken)
Diagnostics.initAccountId(optionsParsed.streamAccountId)
logger.info(`Getting subscriber connection data for stream name: ${optionsParsed.streamName} and account id: ${optionsParsed.streamAccountId}`)
const payload = { streamAccountId: optionsParsed.streamAccountId, streamName: optionsParsed.streamName }
let headers = { 'Content-Type': 'application/json' }
if (optionsParsed.subscriberToken) {
headers = { ...headers, Authorization: `Bearer ${optionsParsed.subscriberToken}` }
}
const url = `${Director.getEndpoint()}/api/director/subscribe`
try {
const response = await fetch(url, { method: 'POST', headers, body: JSON.stringify(payload) })
let data = await response.json()
if (data.status === 'fail') {
const error = new FetchError(data.data.message, response.status)
throw error
}
data = parseIncomingDirectorResponse(data)
logger.debug('Getting subscriber response: ', data)
return data.data
} catch (e) {
logger.error('Error while getting subscriber connection path. ', e)
throw e
}
}
}
const getPublisherOptions = (options, legacyStreamName, legacyStreamType) => {
let parsedOptions = (typeof options === 'object') ? options : {}
if (Object.keys(parsedOptions).length === 0) {
parsedOptions = {
token: options,
streamName: legacyStreamName,
streamType: legacyStreamType
}
}
return parsedOptions
}
const getSubscriberOptions = (options, legacyStreamAccountId, legacySubscriberToken) => {
let parsedOptions = (typeof options === 'object') ? options : {}
if (Object.keys(parsedOptions).length === 0) {
parsedOptions = {
streamName: options,
streamAccountId: legacyStreamAccountId,
subscriberToken: legacySubscriberToken
}
}
if (config.MILLICAST_FIXED_ACCOUNT_ID) {
parsedOptions = { ...parsedOptions, streamAccountId: config.MILLICAST_FIXED_ACCOUNT_ID }
}
return parsedOptions
}
const parseIncomingDirectorResponse = (directorResponse) => {
if (Director.getLiveDomain()) {
const domainRegex = /\/\/(.*?)\//
const urlsParsed = directorResponse.data.urls.map(url => {
const matched = domainRegex.exec(url)
return url.replace(matched[1], Director.getLiveDomain())
})
directorResponse.data.urls = urlsParsed
}
return directorResponse
}
export default Director