/// <summary>
/// A handshake is performed at the beginning to retrieve the
/// SessionID, SubmissionURL and NowplayingURL and also everytime the server
/// reports that the SessionID is invalid.
/// </summary>
private void doHandshake()
{
Request request = new Request(new Uri("http://post.audioscrobbler.com:80/"), handshakeParameters);
string[] response = request.execute().Split('\n');
SessionID = response[1];
NowplayingURL = new Uri(response[2]);
SubmissionURL = new Uri(response[3]);
}
/// <summary>
/// The internal scrobble function, scrobbles pure request parameters.
/// Could be for more than one track, as specified by Last.fm, but they recommend that
/// only one track should be submitted at a time.
/// </summary>
/// <param name="parameters">
/// A <see cref="RequestParameters"/>
/// </param>
internal void Scrobble(RequestParameters parameters)
{
Initialize();
parameters["s"] = SessionID;
Request request = new Request(this.SubmissionURL, parameters);
// A BadSessionException occurs when another client has made a handshake
// with this user's credentials, should redo a handshake and pass this
// exception quietly.
try
{
request.execute();
} catch (BadSessionException) {
this.doHandshake();
this.Scrobble(parameters);
}
}
/// <summary>
/// Send the now playing notification.
/// </summary>
/// <param name="track">
/// A <see cref="NowplayingTrack"/>
/// </param>
public void ReportNowplaying(NowplayingTrack track)
{
Initialize();
RequestParameters p = new RequestParameters();
p["s"] = SessionID;
p["a"] = track.Artist;
p["t"] = track.Title;
p["b"] = track.Album;
if (track.Duration.TotalSeconds == 0)
p["l"] = "";
else
p["l"] = track.Duration.TotalSeconds.ToString();
if (track.Number == 0)
p["n"] = "";
else
p["n"] = track.Number.ToString();
p["m"] = track.MBID;
Request request = new Request(this.NowplayingURL, p);
// A BadSessionException occurs when another client has made a handshake
// with this user's credentials, should redo a handshake and pass this
// exception quietly.
try
{
request.execute();
} catch (BadSessionException) {
this.doHandshake();
this.ReportNowplaying(track);
}
}