lastfm-node
Read and write to users recent plays on Last.fm.
Installation
npm install lastfm
Usage
var LastFmNode = require('lastfm').LastFmNode;
var lastfm = new LastFmNode({
api_key: 'apikey', // sign-up for a key at http://www.last.fm/api
secret: 'secret',
useragent: 'appname/vX.X MyApp' // optional. defaults to lastfm-node.
});
Tests
Tests currently use a very old testing framework found at https://github.com/mynyml/ntest. You can get them running by cloning that repository and doing
$ ln -s /path/to/ntest/lib node_modules/ntest
Then run the tests
$ node tests/
Documentation
LastFmRequest
lastfm.request(method, options);
Returns a LastFmRequest instance.
Send request to Last.fm. Requests automatically include the API key and are signed and/or sent via POST as described in the Last.fm API documentation.
Methods:
Accepts any Last.fm API method name, eg "artist.getInfo".
Options:
All options are passed through to Last.fm with the exception of the following.
-
write
Force request to act as a write method. Write methods are signed and sent via POST. Useful for new methods not yet recognised by lastfm-node. -
signed
Force request to be signed. See Last.fm API docs for signature details. Useful for new methods not yet recognised by lastfm-node. -
handlers
Default event handlers to attach to the request object on creation.
Events:
-
success(json)
JSON response from Last.fm -
error(error)
Ruh-roh. Either a error returned by Last.fm or a transmission error.
RecentTracksStream
lastfm.stream(username);
Returns: a RecentTracksStream instance
Methods:
-
start()
Start streaming recent track info. -
stop()
Stop streaming recent track info. -
isStreaming()
Boolean. True is nowplaying/recent track data is being actively fetched. -
on(event, listener)
Adds a listener for the specified event. -
removeListener(event, listener)
Removes the listener for the specified event.
Options:
-
autostart
Start streaming automatically. Defaults to false. -
extended
Includes extended data in each artist, and whether or not the user has loved each track -
handlers
Default event handlers to attach to the request object on creation.
Events:
-
lastPlayed(track)
The user's last scrobbled track. -
nowPlaying(track)
Track the user is currently listening to. -
scrobbled(track)
Now playing track has been scrobbled. -
stoppedPlaying(track)
User stopped listening to current track. -
error(error)
Ruh-roh.
LastFmSession
lastfm.session(options);
Returns: a LastFmSession instance.
If the user and session key are already known supply these in the options. Otherwise supply a token for authorisation. When a token is supplied the session will be authorised with Last.fm. If the user has not yet approved the token (desktop application flow) then authorisation will be automatically retried.
See the last.fm API documentation for more info on Last.fm authorisation flow.
Options:
-
user
User name, if known. -
key
Session key, if known. -
token
Token supplied by auth.getToken or web flow callback. -
retryInterval
Time in milliseconds to leave between retries. Defaults to 10 seconds. -
handlers
Default event handlers to attach to the session object on creation.
Public properties:
-
user
The username of the Last.fm user associated with the session. -
key
The session key. Either passed in or generated using authorise().
Methods:
-
authorise(token, [options])
Deprecated. Use lastfm.session({ token: token }) instead. Authorises user with Last.fm api. See last.fm documentation. Options argument has handlers property that has default event handlers to attach to the LastFmSession instance. -
on(event, handler)
Adds a listener for the specified event. -
removeListener(event, handler)
Removes the listener for the specified event. -
isAuthorised()
Returns true if the session has been authorised or a key was specified in the constructor. -
cancel()
Prevent any further authorisation retries. Only applies if token supplied.
Events:
-
success(session)
Authorisation of session was successful. Note: Only emitted if a token was supplied in options. Username/key combinations supplied in options are assumed to be valid. -
authorised(session)
Deprecated: Use success instead. Authorisation of session was successful. -
retrying(retry)
Authorisation request was not successful but will be retried after a delay. Retry object contains the following properties: `delay` - The time in milliseconds before the request will be retried. `error` - The error code returned by the Last.fm API. `message` - The error message returned by the Last.fm API. -
error(track, error)
The authorisation was not successful and will not be retried.
LastFmUpdate
lastfm.update(method, session, options);
Returns a LastFmUpdate instance.
Valid methods are 'nowplaying' and 'scrobble'.
An authorised LastFmSession instance is required to make a successful update.
If a scrobble request receives an 11 (service offline), 16 (temporarily unavailable) or 29 (rate limit exceeded) error code from Last.fm then the request is automatically retried until it is permanently rejected or accepted. The first retry attempt is made after 10 seconds with subsequent requests delayed by 30 seconds, 1 minute, 5 minutes, 15 minutes and then every 30 minutes.
Options:
Accepts all parameters used by track.updateNowPlaying and user.scrobble (see Last.Fm API) as well as:
-
track
Track for nowplaying and scrobble requests. Uses same format as returned by `RecentTracksStream` events. -
timestamp
Required for scrobble requests. Timestamp is in unix time (seconds since 01-01-1970 and is in UTC time). -
handlers
Default event handlers to attach to the request object on creation.
Events:
-
success(track)
Update request was successful. -
retrying(retry)
Scrobble request was not successful but will be retried after a delay. Retry object contains the following properties: `delay` - The time in milliseconds before the request will be retried. `error` - The error code returned by the Last.fm API. `message` - The error message returned by the Last.fm API. -
error(track, error)
Ruh-roh.
LastFmInfo
lastfm.info(itemtype, [options]);
Returns: a LastFmInfo instance.
Gets extended info about specified item.
Public properties:
-
itemtype
Any Last.fm item with a getInfo method. eg user, track, artist, etc.
Options:
-
handlers
Event handlers to attach to object at creation. -
various
Params as specified in Last.fm API, eg user: "username"
Special cases:
When requesting track info the track param can be either the track name or a track object as returned by RecentTracksStream.
Example
var LastFmNode = require('lastfm').LastFmNode;
var lastfm = new LastFmNode({
api_key: 'abc',
secret: 'secret'
});
var trackStream = lastfm.stream('username');
trackStream.on('lastPlayed', function(track) {
console.log('Last played: ' + track.name);
});
trackStream.on('nowPlaying', function(track) {
console.log('Now playing: ' + track.name);
});
trackStream.on('scrobbled', function(track) {
console.log('Scrobbled: ' + track.name);
});
trackStream.on('stoppedPlaying', function(track) {
console.log('Stopped playing: ' + track.name);
});
trackStream.on('error', function(error) {
console.log('Error: ' + error.message);
});
trackStream.start();
var session = lastfm.session({
token: token,
handlers: {
success: function(session) {
lastfm.update('nowplaying', session, { track: track } );
lastfm.update('scrobble', session, { track: track, timestamp: 12345678 });
}
}
});
var request = lastfm.request("artist.getInfo", {
artist: "The Mae Shi",
handlers: {
success: function(data) {
console.log("Success: " + data);
},
error: function(error) {
console.log("Error: " + error.message);
}
}
});
Influences
Heavily drawn from technoweenie's twitter-node
http://github.com/technoweenie/twitter-node
Contributors
- Garret Wilkin (garrettwilkin) - http://geethink.com
- Uwe L. Korn (xhochy) - http://xhochy.com
- Max Kueng (maxkueng) - http://maxkueng.com