/// <summary>
/// Send a request to the audioscrobbler server
/// parse the response into the approriate
/// AudioscrobblerReponse type
/// </summary>
private static AudioscrobblerResponse Send(Uri url)
{
// the response object to return
AudioscrobblerResponse aResponse = null;
// create the request
var request = (HttpWebRequest)WebRequest.Create(url);
// set the method to POST
request.Method = "POST";
request.ContentLength = 0;
// grab the response
// TODO: Change response type to HttpWebResponse
// TODO: Better error handling
using (WebResponse response = request.GetResponse())
{
using (Stream dataStream = response.GetResponseStream())
{
using (var reader = new StreamReader(dataStream))
{
// parse the response string
aResponse = ParseResponse(reader.ReadToEnd());
}
}
}
return(aResponse);
}
/// <summary>
/// Submit a single track to audioscrobbler
/// </summary>
public void SubmitTrack(SongInfo track)
{
// verify that a successful handshake has occured
if (_handshakeSuccessful == false)
{
Handshake();
}
// initialize the url to send requests to
var url = new Uri(_urlPrefix + ProcessTrack(track));
// send the request
AudioscrobblerResponse response = Send(url);
// set the interval variable
_interval = response.Interval;
// parse the response type
// (doesn't do anything for now)
switch (response.Type)
{
case AudioscrobblerResponseType.BADAUTH:
break;
case AudioscrobblerResponseType.FAILED:
break;
case AudioscrobblerResponseType.OK:
break;
}
}
// establish the connection between the client and audioscrobbler
private void Handshake()
{
// values for client
string clientid = "tst";
string clientversion = "1.0";
// reset variables that are set during the handshake
_urlPrefix = string.Empty;
_handshakeSuccessful = false;
// generate the approriate handshake url
// handshake url
// {0} = clientid
// {1} = client version
// {2} = username
var handshakeUrl = new Uri(string.Format("http://post.audioscrobbler.com/?hs=true&p=1.1&c={0}&v={1}&u={2}", clientid, clientversion, _username));
// send the response
AudioscrobblerResponse response = Send(handshakeUrl);
// set the interval value returned by the response
_interval = response.Interval;
// react based on the response type
switch (response.Type)
{
// successful response: grab the url to send tracks to
case AudioscrobblerResponseType.UPTODATE:
_urlPrefix = GetUrlPrefix(response.Variables["MD5Challenge"], response.Variables["UrlToSubmitScript"]);
_handshakeSuccessful = true;
break;
// successful response: grab the url to send tracks to
case AudioscrobblerResponseType.UPDATE:
_urlPrefix = GetUrlPrefix(response.Variables["MD5Challenge"], response.Variables["UrlToSubmitScript"]);
_handshakeSuccessful = true;
break;
// invalid user
case AudioscrobblerResponseType.BADUSER:
throw new AudioscrobblerException("Invalid User");
// request failed for some other reason
case AudioscrobblerResponseType.FAILED:
throw new AudioscrobblerException(response.Variables["Reason"]);
}
}
private static AudioscrobblerResponse GetResponse_OK(string responseString)
{
var response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.OK;
string regex = @"OK\nINTERVAL (?<Interval>[0-9]*)";
RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase;
var reg = new Regex(regex, options);
Match match = reg.Match(responseString);
if (match.Success)
{
response.Interval = Convert.ToInt32(match.Groups["Interval"].Value);
}
return(response);
}
private static AudioscrobblerResponse GetResponse_FAILED(string responseString)
{
var response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.FAILED;
string regex = @"FAILED (?<Reason>[^\n]*)\nINTERVAL (?<Interval>[0-9]*)";
RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase;
var reg = new Regex(regex, options);
Match match = reg.Match(responseString);
if (match.Success)
{
response.Variables.Add("Reason", match.Groups["Reason"].Value);
response.Interval = Convert.ToInt32(match.Groups["Interval"].Value);
}
return(response);
}
// All the response parsers below work the same way
// Set the approriate AudioscrobblerResponseType
// and then user a regular expression to parse out the interval
// and the variables
private static AudioscrobblerResponse GetResponse_UPTODATE(string responseString)
{
var response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.UPTODATE;
string regex = @"UPTODATE\n(?<MD5Challenge>[^\n]*)\n(?<UrlToSubmitScript>[^\n]*)\nINTERVAL (?<Interval>[0-9]*)";
RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase;
var reg = new Regex(regex, options);
Match match = reg.Match(responseString);
if (match.Success)
{
response.Variables.Add("MD5Challenge", match.Groups["MD5Challenge"].Value);
response.Variables.Add("UrlToSubmitScript", match.Groups["UrlToSubmitScript"].Value);
response.Interval = Convert.ToInt32(match.Groups["Interval"].Value);
}
return(response);
}