/// <summary>
/// Formats an XML post header for last.fm's api access
/// </summary>
/// <param name="aMethodType">Is a type of the method to be called: e.g. LoveTrack, BanTrack, etc</param>
/// <param name="aUser">The users last.fm username.</param>
/// <param name="aChallenge">The current UNIX timestamp.</param>
/// <param name="aAuth">The authentication token, a 32-byte ASCII hexadecimal representation of the MD5 hash of the users last.fm password and the timestamp: md5(md5(password) + timestamp)</param>
/// <param name="aArtist">The artist to get love/ban.</param>
/// <param name="aTitle">The track title to get love/ban.</param>
/// <param name="aFriendsUserName">The friends name to remove.</param>
/// <returns>The XML data in string format</returns>
private string BuildXmlRpcRequest(XmlRpcType aMethodType, string aUser, string aChallenge, string aAuth,
string aArtist, string aTitle, string aFriendsUserName)
{
string ResultXml = String.Empty;
List<string> AllParams = new List<string>(5);
try
{
if (!String.IsNullOrEmpty(aUser))
{
AllParams.Add(aUser);
}
if (!String.IsNullOrEmpty(aChallenge))
{
AllParams.Add(aChallenge);
}
if (!String.IsNullOrEmpty(aAuth))
{
AllParams.Add(aAuth);
}
if (aMethodType == XmlRpcType.removeFriend)
{
if (!String.IsNullOrEmpty(aFriendsUserName))
{
AllParams.Add(aFriendsUserName);
}
}
else
{
if (!String.IsNullOrEmpty(aArtist))
{
AllParams.Add(aArtist);
}
if (!String.IsNullOrEmpty(aTitle))
{
AllParams.Add(aTitle);
}
}
using (MemoryStream memoryStream = new MemoryStream())
{
XmlWriterSettings settings = new XmlWriterSettings();
//settings.Indent = true;
//settings.IndentChars = (" ");
settings.CloseOutput = true;
// If i use Encodings.UTF8 the BOM will be prepended...
settings.Encoding = new UTF8Encoding(false);
using (XmlWriter writer = XmlWriter.Create(memoryStream, settings))
{
writer.WriteStartElement("methodCall");
writer.WriteElementString("methodName", aMethodType.ToString());
writer.WriteStartElement("params");
foreach (string singleParam in AllParams)
{
writer.WriteStartElement("param");
writer.WriteStartElement("value");
writer.WriteElementString("string", singleParam);
writer.WriteEndElement();
writer.WriteEndElement();
}
writer.WriteEndElement();
writer.WriteEndElement();
writer.Flush();
}
ResultXml = Encoding.UTF8.GetString(memoryStream.GetBuffer());
Log.Debug("AudioscrobblerUtils: Successfully created XMLRPC call for method {0}", aMethodType.ToString());
}
}
catch (Exception ex)
{
Log.Error("AudioscrobblerUtils: Error in BuildXmlRpcRequest - {0}", ex.Message);
}
return ResultXml;
}
