README.md
# Quickstart
[](https://travis-ci.org/alvassin/nodejs-icecast-monitor) [](https://codeclimate.com/github/alvassin/nodejs-icecast-monitor) [](https://codeclimate.com/github/alvassin/nodejs-icecast-monitor/coverage)
Powerful & handy interface for icecast-kh monitoring & statistics collection (admin access is required).
* Able to collect icecast stats in realtime;
* Provides easy access to all stats, available in web admin;
* Can deal with very large amounts of data in memory-effective way;
* Has only one npm dependency.
To install latest stable version use `npm install icecast-monitor` command.
* [Options](#options)
* [Methods](#methods)
* [createFeed](#monitorcreatefeed)
* [getServerInfo](#monitorgetserverinfo)
* [getSources](#monitorgetsources)
* [getSource](#monitorgetsource)
* [getListeners](#monitorgetlisteners)
* [createStatsXmlStream](#monitorcreatestatsxmlstream)
* [Feed](#feed)
* [Events](#events)
* [Methods](#methods-1)
* [XmlStreamParser](#xmlstreamparser)
* [Events](#events-1)
# Options
To access icecast monitor features create `Monitor` instance:
```js
var Monitor = require('icecast-monitor');
var monitor = new Monitor({
host: 'icecast.dev',
port: 80,
user: 'admin',
password: 'hackme'
});
```
Following constructor parameters are available:
Parameter | Type | Required | Description
-----------|---------|----------|------------
`host` | String | Yes | IP or DNS name
`port` | Integer | No | Port number (defaults to `80`)
`user` | String | Yes | Admin username
`password` | String | Yes | Admin password
# Methods
#### monitor.createFeed
Creates [Monitor.Feed](#feed) instance, which establishes persistent connection with icecast & processes its events feed.
```js
monitor.createFeed(function(err, feed) {
if (err) throw err;
// Handle wildcard events
feed.on('*', function(event, data, raw) {
console.log(event, data, raw);
});
// Handle usual events
feed.on('mount.listeners', function(listeners, raw) {
console.log(listeners, raw);
});
});
```
#### monitor.getServerInfo
Returns information about icecast server. Please see [Monitor.XmlStreamParser `server` event](#server) data for details.
```js
monitor.getServerInfo(function(err, server) {
if (err) throw err;
console.log(server);
});
```
#### monitor.getSources
Returns array with all audio sources (without detailed listeners information). Please see [Monitor.XmlStreamParser `source` event](#source) for data provided about every source.
```js
monitor.getSources(function(err, sources) {
if (err) throw err;
console.log(sources);
});
```
#### monitor.getSource
Provides detailed information about specified source & its listeners.
```js
monitor.getSource('/some-mountpoint', function(err, source) {
if (err) throw err;
console.log(source);
});
```
Returns same data as [Monitor.XmlStreamParser `source` event](#source), with one difference: `listeners` parameter will contain `array` with [information about every listener](#listener).
#### monitor.getListeners
Returns array with all listeners, connected to icecast server. Please see [Monitor.XmlStreamParser `listener` event](#listener) data for details. *Can produce huge amounts of data, use wisely.*
```js
monitor.getListeners(function(err, listeners) {
if (err) throw err;
console.log(listeners);
});
```
#### monitor.createStatsXmlStream
Performs HTTP request to given icecast url path and returns stream for further processing. Can be useful to process large icecast XML output using [Monitor.XmlStreamParser](#xmlstreamparser).
We use following icecast url paths:
* `/admin/stats`
* icecast server information
* sources detailed information
* no detailed listeners information
* `/admin/stats?mount=/$mount`
* icecast server information
* specified source information
* detailed information about connected listeners
* `/admin/listmounts?with_listeners`
* no information about icecast server
* minimal information about sources
* and detailed information about all icecast listeners
```js
// Collect sources without storing them in a memory
monitor.createStatsXmlStream('/admin/stats', function(err, xmlStream) {
if (err) throw err;
var xmlParser = new Monitor.XmlStreamParser();
xmlParser.on('error', function(err) {
console.log('error', err);
});
xmlParser.on('source', function(source) {
// Do work with received source
console.log('source', source);
});
// Finish event is being piped from xmlStream
xmlParser.on('finish', function() {
console.log('all sources are processed');
});
xmlStream.pipe(xmlParser);
});
```
# Feed
Establishes persistent connection with icecast using STATS HTTP method & processes events feed in realtime. Best way to create is to use [monitor.createFeed](#createfeed) method, which injects all necessary parameters.
## Events
For mount.* and server.* events user-callback is provided with following parameters:
Parameter | Type | Description
----------|--------|------------
`event` | String | Event name (present only for wildcard events)
`data` | Mixed | Parsed parameter(s), is described for each event below
`raw` | String | Raw message received from icecast
* **Internal events**
* `connect`: connection with icecast is established
* `disconnect`: connection with icecast is closed
* **Wildcard events**
* `*`: groups absolutely all supported events, produces lots of calls
* `mount.*`: groups all mount-related events
* `server.*`: groups all server-related events
* **Mounts events**
* [`mount.audioCodecId`](#mountaudiocodecid)
* [`mount.audioInfo`](#mountaudioinfo)
* [`mount.authenticator`](#mountauthenticator)
* [`mount.bitrate`](#mountbitrate)
* [`mount.connected`](#mountconnected)
* [`mount.delete`](#mountdelete)
* [`mount.flush`](#mountflush)
* [`mount.genre`](#mountgenre)
* [`mount.incomingBitrate`](#mountincomingbitrate)
* [`mount.listenerConnections`](#mountlistenerconnections)
* [`mount.listenerPeak`](#mountlistenerpeak)
* [`mount.listeners`](#mountlisteners)
* [`mount.listenUrl`](#mountlistenurl)
* [`mount.maxListeners`](#mountmaxlisteners)
* [`mount.metadataUpdated`](#mountmetadataupdated)
* [`mount.mpegChannels`](#mountmpegchannels)
* [`mount.mpegSampleRate`](#mountmpegsamplerate)
* [`mount.new`](#mountnew)
* [`mount.outgoingKBitrate`](#mountoutgoingkbitrate)
* [`mount.public`](#mountpublic)
* [`mount.queueSize`](#mountqueuesize)
* [`mount.serverDescription`](#mountserverdescription)
* [`mount.serverName`](#mountservername)
* [`mount.serverType`](#mountservertype)
* [`mount.serverUrl`](#mountserverurl)
* [`mount.slowListeners`](#mountslowlisteners)
* [`mount.sourceIp`](#mountsourceip)
* [`mount.streamStart`](#mountstreamstart)
* [`mount.title`](#mounttitle)
* [`mount.totalBytesRead`](#mounttotalbytesread)
* [`mount.totalBytesSent`](#mounttotalbytessent)
* [`mount.totalMBytesSent`](#mounttotalmbytessent)
* [`mount.ypCurrentlyPlaying`](#mountypcurrentlyplaying)
* **Server events**
* [`server.admin`](#serveradmin)
* [`server.bannedIPs`](#serverbannedips)
* [`server.build`](#serverbuild)
* [`server.clientConnections`](#serverclientconnections)
* [`server.clients`](#serverclients)
* [`server.connections`](#serverconnections)
* [`server.fileConnections`](#serverfileconnections)
* [`server.host`](#serverhost)
* [`server.info`](#serverinfo)
* [`server.listenerConnections`](#serverlistenerconnections)
* [`server.listeners`](#serverlisteners)
* [`server.location`](#serverlocation)
* [`server.outgoingKBitrate`](#serveroutgoingkbitrate)
* [`server.serverId`](#serverserverid)
* [`server.serverStart`](#serverserverstart)
* [`server.sourceClientConnections`](#serversourceclientconnections)
* [`server.sourceRelayConnections`](#serversourcerelayconnections)
* [`server.sources`](#serversources)
* [`server.sourceTotalConnections`](#serversourcetotalconnections)
* [`server.stats`](#serverstats)
* [`server.statsConnections`](#serverstatsconnections)
* [`server.streamKBytesRead`](#serverstreamkbytesread)
* [`server.streamKBytesSent`](#serverstreamkbytessent)
#### mount.audioCodecId
```
EVENT /test.mp3 audio_codecid 2
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Audio codec id: 2 for mp3, 10 for aac
#### mount.audioInfo
Displays audio encoding information.
```
EVENT /test.mp3 audio_info channels=2;samplerate=44100;bitrate=64
```
Parameter | Type | Description
------------------|---------|------------
`mount` | String | Mountpoint name
`data` | Object | Audio channel info
`data.channels` | Integer | Number of channels
`data.sampleRate` | Integer | Sample rate
`data.bitrate` | Integer | Bitrate (kbps)
#### mount.authenticator
```
EVENT /test.mp3 authenticator command
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | Authenticator type
#### mount.bitrate
```
EVENT /test.mp3 bitrate 64
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Bitrate (kbps), used for stats & YP
#### mount.connected
```
EVENT /test.mp3 connected 180423
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Connection duration in seconds
#### mount.delete
Emitted when mount is deleted. Allows to notify relays about deleted source immediately (rather than wait for polling by the slaves).
```
DELETE /test.mp3
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Deleted mountpoint name
#### mount.flush
```
FLUSH /test.mp3
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Flushed mountpoint name
#### mount.genre
```
EVENT /test.mp3 genre Misc
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | Genre name, used for stats & YP
#### mount.incomingBitrate
```
EVENT /test.mp3 incoming_bitrate 127064
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Source bitrate (bps)
#### mount.listenerConnections
```
EVENT /test.mp3 listener_connections 4
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Connections number
#### mount.listenerPeak
```
EVENT /test.mp3 listener_peak 2
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Max detected number of simultaneous listeners
#### mount.listeners
```
EVENT /test.mp3 listeners 2
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Current listeners number
#### mount.listenUrl
```
EVENT /11-31.mp3 listenurl http://icecast.dev:80/test.mp3
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | Audio stream url
#### mount.maxListeners
```
EVENT /11-31.mp3 max_listeners -1
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Simultanious listeners limit
#### mount.metadataUpdated
Is emitted when track is updated.
```
EVENT /test.mp3 metadata_updated 06/Aug/2015:14:05:05 +0300
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | Date when metadata was updated
#### mount.mpegChannels
```
EVENT /test.mp3 mpeg_channels 2
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Number of audio channels
#### mount.mpegSampleRate
```
EVENT /test.mp3 mpeg_samplerate 44100
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Sample rate
#### mount.new
Emitted when new mount is created. Allows to notify relays about new source immediately (rather than wait for polling by the slaves).
```
NEW audio/mpeg /229-682.mp3
```
Parameter | Type | Description
-------------|--------|------------
`mount` | String | Mountpoint
`data` | String | Mime type
#### mount.outgoingKBitrate
```
EVENT /test.mp3 outgoing_kbitrate 0
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Outgoing bitrate (kbps)
#### mount.public
Displays mount visibility (advertisement) setting.
```
EVENT /test.mp3 public 1
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Possible values: `-1` (up to source client / relay) , `0` (disable), `1` (force advertisement)
#### mount.queueSize
```
EVENT /test.mp3 queue_size 65828
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Queue size
#### mount.serverDescription
```
EVENT /test.mp3 server_description My station description
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | User-defined station description
#### mount.serverName
```
EVENT /test.mp3 server_name TestFM
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | User-defined station name
#### mount.serverType
```
EVENT /test.mp3 server_type audio/mpeg
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | Mime type
#### mount.serverUrl
```
EVENT /test.mp3 server_url http://example.com/
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | User-defined url
#### mount.slowListeners
```
EVENT /test.mp3 slow_listeners 0
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Slow listeners number
#### mount.sourceIp
```
EVENT /test.mp3 source_ip icecast.dev
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | Mounpoint stream source host or ip address
#### mount.streamStart
```
EVENT /test.mp3 stream_start 04/Aug/2015:12:00:31 +0300
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | Date, when mount started streaming
#### mount.title
```
EVENT /test.mp3 title Werkdiscs - Helena Hauff - 'Sworn To Secrecy Part II'
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | Track name
#### mount.totalBytesRead
```
EVENT /test.mp3 total_bytes_read 1443575627
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Source (incoming) traffic in bytes
#### mount.totalBytesSent
```
EVENT /test.mp3 total_bytes_sent 256000
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Source (outgoing) traffic in bytes
#### mount.totalMBytesSent
```
EVENT /test.mp3 total_mbytes_sent 0
```
Parameter | Type | Description
----------|---------|------------
`mount` | String | Mountpoint name
`data` | Integer | Source (outgoing) traffic in bytes
#### mount.ypCurrentlyPlaying
```
EVENT /test.mp3 yp_currently_playing Nickelback - How You Remind Me
```
Parameter | Type | Description
----------|--------|------------
`mount` | String | Mountpoint name
`data` | String | Track, that is displayed in YP
#### server.admin
Displays administrator's email.
```
EVENT global admin email@example.com
```
Parameter | Type | Description
----------|--------|------------
`data` | String | Administrator email
#### server.bannedIPs
```
EVENT global banned_IPs 0
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Banned ip addresses number
#### server.build
```
EVENT global build 20150616004931
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Build number
#### server.clientConnections
```
EVENT global client_connections 1029675
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Client connections number
#### server.clients
```
EVENT global clients 62
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Connected clients
#### server.connections
```
EVENT global connections 1178553
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Connections number
#### server.fileConnections
```
EVENT global file_connections 3534
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | File connections number
#### server.host
Configuration icecast.hostname setting value. Is used for the stream directory lookups or playlist generation possibily if a Host header is not provided.
```
EVENT global host icecast.dev
```
Parameter | Type | Description
----------|--------|------------
`data` | String | Server DNS name or IP address
#### server.info
Identifies the end of the big list at the beginning. When initially connected, you get a snapshot (a blast of content), and this just marks the end of it. After this then the stats are generated since the snapshot.
```
INFO full list end
```
#### server.listenerConnections
```
EVENT global listener_connections 220589
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Listener connections number
#### server.listeners
```
EVENT global listeners 16
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Current listeners number
#### server.location
Configuration icecast.location setting value, is also displayed in web interface.
```
EVENT global location RU
```
Parameter | Type | Description
----------|--------|------------
`data` | String | Server location
#### server.outgoingKBitrate
```
EVENT global outgoing_kbitrate 4411
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Outgoing bitrate (kbps)
#### server.serverId
Icecast server identifier. Can be overrided in config file.
```
EVENT global server_id Icecast 2.4.0-kh1
```
Parameter | Type | Description
----------|--------|------------
`data` | String | Server identifier (icecast followed by a version number or user-defined value)
#### server.serverStart
```
EVENT global server_start 06/Jul/2015:00:19:34 +0300
```
Parameter | Type | Description
----------|--------|------------
`data` | String | Server start date
#### server.sourceClientConnections
```
EVENT global source_client_connections 0
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Source client connections number
#### server.sourceRelayConnections
```
EVENT global source_relay_connections 1317
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Source relay connections number
#### server.sources
```
EVENT global sources 45
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Sources number
#### server.sourceTotalConnections
```
EVENT global source_total_connections 1318
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Source total connections number
#### server.stats
```
EVENT global stats 0
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | ?
#### server.statsConnections
```
EVENT global stats_connections 2
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | ?
#### server.streamKBytesRead
```
EVENT global stream_kbytes_read 2414225600
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Stream incoming traffic (kbytes)
#### server.streamKBytesSent
```
EVENT global stream_kbytes_sent 1102687068
```
Parameter | Type | Description
----------|---------|------------
`data` | Integer | Stream outgoing traffic (kbytes)
## Methods
#### feed.connect
Establishes connection, once connected emits `connect` event. If you use [createFeed](#monitorcreatefeed) method, it will call `feed.connect` automatically, so this method can be used to handle disconnects like shown below:
```js
monitor.createFeed(function(err, feed) {
if (err) throw err;
// Handle disconnects
feed.on('disconnect', function() {
feed.connect();
});
});
```
#### feed.disconnect
Closes icecast connection, once disconnected emits `disconnect` event.
```js
monitor.createFeed(function(err, feed) {
if (err) throw err;
feed.on('connect', function() {
// Disconnect with 5 seconds delay
setTimeout(feed.disconnect, 5000);
});
});
```
# XmlStreamParser
[Writeable stream](https://nodejs.org/api/stream.html#stream_class_stream_writable), that allows to retrieve sources, listeners & server information from icecast xml stream. Icecast xml stream can be retrieved using [monitor.createStatsXmlStream](#monitorcreatestatsxmlstream) method.
Using XmlStreamParser directly can be more memory-effective when dealing with large icecast output, then using [monitor.getServerInfo](#monitorgetserverinfo), [monitor.getSources](#monitorgetsources), [monitor.getSource](#monitorgetsource) and [monitor.getListeners](#monitorgetlisteners) methods, because those methods have to store information in memory before it is returned in callback.
```js
// Collect sources without storing them in a memory
monitor.createStatsXmlStream('/admin/stats', function(err, xmlStream) {
if (err) throw err;
var xmlParser = new Monitor.XmlStreamParser();
// Handle errors
xmlParser.on('error', function(err) {
console.log('error', err);
});
// Handle server info
xmlParser.on('server', function(server) {
console.log('server', server);
});
// Handle sources
xmlParser.on('source', function(source) {
console.log('source', source);
});
// Handle listeners
xmlParser.on('listener', function(listener) {
console.log('listener', listener);
});
// Xml stream finished
xmlParser.on('finish', function() {
console.log('data is finished');
});
xmlStream.pipe(xmlParser);
});
```
## Events
* [`error`](#error)
* [`server`](#server)
* [`source`](#source)
* [`listener`](#listener)
* [`finish`](https://nodejs.org/api/stream.html#stream_event_finish)
#### error
Represents error, that happened while parsing xml stream.
#### server
Is emitted when xml stream processing is finished. Returns following information about icecast server:
Parameter | Type | Description
--------------------------|---------|------------
`admin` | String | Administrator's email
`bannedIPs` | Integer | Banned ip addresses number
`build` | Integer | Build number
`clientConnections` | Integer | Total client (sources, listeners, web requests, etc) connections number
`clients` | Integer | Current clients (sources, listeners, web requests, etc) number
`connections` | Integer | ?
`fileConnections` | Integer | File connections number
`host` | String | Host DNS or IP address (is defined by `hostname` setting in icecast config)
`listenerConnections` | Integer | Listeners connections number
`listeners` | Integer | Listeners number
`location` | String | Server location (is defined by `location` setting in icecast config)
`outgoingKBitrate` | Integer | Outgoing bitrate in Kbps
`serverId` | String | Server identifier (is defined by `server-id` setting in icecast config)
`serverStart` | String | Server start date
`sourceClientConnections` | Integer | Source clients connections number
`sourceRelayConnections` | Integer | Source relays connections number
`sources` | Integer | Sources (mountpoints) number
`sourceTotalConnections` | Integer | Total connections number
`stats` | Integer | Number currently connected clients using STATS HTTP method (like [Monitor.Feed](#feed)
`statsConnections` | Integer | STATS HTTP method total connections number
`streamKBytesRead` | Integer | Streaming incoming traffic (KB)
`streamKBytesSent` | Integer | Streaming outgoing traffic (KB)
#### source
Is emitted when source processing is finished. Returns following information for every source:
Parameter | Type | Description
----------------------|---------|------------
`mount` | String | Mountpoint
`audioCodecId` | Integer | Audio codec id: 2 for mp3, 10 for aac
`audioInfo` | String | Audio encoding information
`authenticator` | String | Authentication scheme
`bitrate` | Integer | User-defined bitrate (Kbps)
`connected` | Integer | Connected time in seconds
`genre` | String | User-defined genre
`incomingBitrate` | Integer | Source stream bitrate (bps)
`listenerConnections` | Integer | Listener connections number
`listenerPeak` | Integer | Maximum detected number of simultaneous users
`listeners` | Integer | Current listeners number
`listenUrl` | String | Audio stream url
`maxListeners` | Integer | Listeners limit
`metadataUpdated` | String | Last metadata update date
`mpegChannels` | Integer | Mpeg channels number
`mpegSampleRate` | Integer | Mpeg sample rate
`outputKBitrate` | Integer | Outgoing bitrate for all listeners (Kbps)
`public` | Integer | Source advertisement: `-1` - source client or relay determines if mountpoint should be advertised, `0` - disables advertisement, `1` - forces advertisement
`queueSize` | Integer | Can vary (typically) because lagging clients cause the size to increase until they either get kicked off or they catch up
`serverDescription` | String | User-defined description
`serverName` | String | User-defined name
`serverType` | String | Mime type
`serverUrl` | String | User-defined url
`slowListeners` | Integer | Slow listeners number
`sourceIp` | String | Source ip address
`streamStart` | String | Date, when stream started
`title` | String | Track name
`totalBytesRead` | Integer | Incoming traffic
`totalBytesSent` | Integer | Outgoing traffic (Bytes)
`totalMBytesSent` | Integer | Outgoing traffic (MBytes)
`ypCurrentlyPlaying` | String | YP track title
#### listener
Is emitted when listener processing is finished. Returns following information for every listener:
Parameter | Type | Description
------------|---------|------------
`id` | Integer | Icecast internal id, can be used to kick listeners, move them between mounts, etc.
`ip` | String | Listener's ip address
`userAgent` | String | Listener's user agent
`referrer` | String | Url, where listener came from
`lag` | Integer | ?
`connected` | Integer | Connected time in seconds
`mount` | String | Source mounpoint