private AudioscrobblerResponse GetResponse_UNKNOWN(string responseString)
{
AudioscrobblerResponse response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.UNKNOWN;
return(response);
}
/// <summary>
/// Send a request to the audioscrobbler server
/// parse the response into the approriate
/// AudioscrobblerReponse type
/// </summary>
private AudioscrobblerResponse Send(string url)
{
// the response object to return
AudioscrobblerResponse aResponse = null;
// create the request
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
//request.Proxy = new WebProxy("proxy.inside.us.dell.com");
//request.Proxy.Credentials = new NetworkCredential("Daniel_Poage", "Ahascsi2940u2w1");
// 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 (StreamReader reader = new StreamReader(dataStream))
{
// parse the response string
aResponse = ParseResponse(reader.ReadToEnd());
}
}
}
return(aResponse);
}
// establish the connection between the client and audioscrobbler
private void Handshake()
{
// handshake url
// {0} = clientid
// {1} = client version
// {2} = username
string handshakeUrl = "http://post.audioscrobbler.com/?hs=true&p=1.1&c={0}&v={1}&u={2}";
// 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
handshakeUrl = string.Format(handshakeUrl, clientid, clientversion, username);
// send the response
AudioscrobblerResponse response = this.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"]);
}
}
/// <summary>
/// Submits a list of tracks to audioscrobbler
/// </summary>
public void SubmitTrack(IList <IMediaItem> tracks, IList <DateTime> timesStarted)
{
// if there are no tracks in this request, return
if (tracks.Count == 0 || tracks.Count != timesStarted.Count)
{
return;
}
// verify that a successful handshake has occured
if (handshakeSuccessful == false)
{
this.Handshake();
}
// initialize the url to send requests to
string url = urlPrefix;
// loop through each track and append its info to the url
for (int i = 0; i < tracks.Count; i++)
{
url += ProcessTrack(tracks[i], timesStarted[i], i);
}
// send the request
AudioscrobblerResponse response = this.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;
}
// update the date of the last request
// (isn't used now, but could be used in conjunction
// with interval to wait before submitting a request)
lastRequest = DateTime.Now;
}
/// <summary>
/// Parse the response string into the approriate type
/// </summary>
private AudioscrobblerResponse ParseResponse(string responseString)
{
// if for any reason the response is empty (why would it be?),
// return null
if (responseString.Length == 0)
{
return(null);
}
AudioscrobblerResponse response = new AudioscrobblerResponse();
// figure out the response type and parse it approriately
if (RequestStartsWith(responseString, "UPTODATE"))
{
response = GetResponse_UPTODATE(responseString);
}
else if (RequestStartsWith(responseString, "UPDATE"))
{
response = GetResponse_UPDATE(responseString);
}
else if (RequestStartsWith(responseString, "FAILED"))
{
response = GetResponse_FAILED(responseString);
}
else if (RequestStartsWith(responseString, "BADUSER"))
{
response = GetResponse_BADUSER(responseString);
}
else if (RequestStartsWith(responseString, "BADAUTH"))
{
response = GetResponse_BADAUTH(responseString);
}
else if (RequestStartsWith(responseString, "OK"))
{
response = GetResponse_OK(responseString);
}
else
{
response = GetResponse_UNKNOWN(responseString);
}
return(response);
}
private AudioscrobblerResponse GetResponse_OK(string responseString)
{
AudioscrobblerResponse response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.OK;
string regex = @"OK\nINTERVAL (?<Interval>[0-9]*)";
RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase;
Regex reg = new Regex(regex, options);
Match match = reg.Match(responseString);
if (match.Success)
{
response.Interval = Convert.ToInt32(match.Groups["Interval"].Value);
}
return(response);
}
private AudioscrobblerResponse GetResponse_FAILED(string responseString)
{
AudioscrobblerResponse response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.FAILED;
string regex = @"FAILED (?<Reason>[^\n]*)\nINTERVAL (?<Interval>[0-9]*)";
RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase;
Regex 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 AudioscrobblerResponse GetResponse_UPTODATE(string responseString)
{
AudioscrobblerResponse 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;
Regex 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);
}
private AudioscrobblerResponse GetResponse_UNKNOWN(string responseString)
{
AudioscrobblerResponse response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.UNKNOWN;
return response;
}
private AudioscrobblerResponse GetResponse_OK(string responseString)
{
AudioscrobblerResponse response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.OK;
string regex = @"OK\nINTERVAL (?<Interval>[0-9]*)";
RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase;
Regex reg = new Regex(regex, options);
Match match = reg.Match(responseString);
if (match.Success)
{
response.Interval = Convert.ToInt32(match.Groups["Interval"].Value);
}
return response;
}
private AudioscrobblerResponse GetResponse_FAILED(string responseString)
{
AudioscrobblerResponse response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.FAILED;
string regex = @"FAILED (?<Reason>[^\n]*)\nINTERVAL (?<Interval>[0-9]*)";
RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase;
Regex 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;
}
private AudioscrobblerResponse GetResponse_UPDATE(string responseString)
{
AudioscrobblerResponse response = new AudioscrobblerResponse();
response.Type = AudioscrobblerResponseType.UPDATE;
string regex = @"UPDATE (?<UpdateUrl>[^\n]*)\n(?<MD5Challenge>[^\n]*)\n(?<UrlToSubmitScript>[^\n]*)\nINTERVAL (?<Interval>[0-9]*)";
RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase;
Regex reg = new Regex(regex, options);
Match match = reg.Match(responseString);
if (match.Success)
{
response.Variables.Add("UpdateUrl", match.Groups["UpdateUrl"].Value);
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;
}
/// <summary>
/// Parse the response string into the approriate type
/// </summary>
private AudioscrobblerResponse ParseResponse(string responseString)
{
// if for any reason the response is empty (why would it be?),
// return null
if (responseString.Length == 0)
return null;
AudioscrobblerResponse response = new AudioscrobblerResponse();
// figure out the response type and parse it approriately
if (RequestStartsWith(responseString, "UPTODATE"))
{
response = GetResponse_UPTODATE(responseString);
}
else if (RequestStartsWith(responseString, "UPDATE"))
{
response = GetResponse_UPDATE(responseString);
}
else if (RequestStartsWith(responseString, "FAILED"))
{
response = GetResponse_FAILED(responseString);
}
else if (RequestStartsWith(responseString, "BADUSER"))
{
response = GetResponse_BADUSER(responseString);
}
else if (RequestStartsWith(responseString, "BADAUTH"))
{
response = GetResponse_BADAUTH(responseString);
}
else if (RequestStartsWith(responseString, "OK"))
{
response = GetResponse_OK(responseString);
}
else
{
response = GetResponse_UNKNOWN(responseString);
}
return response;
}
