/// <summary>
/// Does the basic command. In the NNTP protocol, a command is sent and the server
/// possibly returns some text and finally is returns a response code. If a server
/// returned line equal a single "." we are done and nothing more is returned. If
/// the server returns a ".." (double period) the leading period is removed and the
/// remaining string is returned.
/// </summary>
/// <param name="command">The command.</param>
/// <param name="expectedResponseCode">The expected response code.</param>
/// <returns></returns>
protected IEnumerable <string> DoBasicCommand(string command, int expectedResponseCode)
{
ValidateConnectionState();
NntpReaderWriter.WriteCommand(command);
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != expectedResponseCode)
{
throw new NntpResponseException(Resource.ErrorMessage12, NntpReaderWriter.LastResponse);
}
do
{
string line = NntpReaderWriter.ReadLine();
if (line.Equals("."))
{
break;
}
else if (line.StartsWith(".."))
{
line = line.Substring(1);
}
yield return(line);
} while (true);
}
/// <summary>
/// Selects the newsgroup.
/// </summary>
/// <param name="group">The group.</param>
public virtual void SelectNewsgroup(string group)
{
if (string.IsNullOrEmpty(group))
{
throw new ArgumentNullException("group");
}
ValidateConnectionState();
NntpReaderWriter.WriteCommand("GROUP " + group);
string response = NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode == Rfc977ResponseCodes.NewsgroupSelected)
{
string[] parts = response.Split(' ');
NewsgroupStatistics g = new NewsgroupStatistics(group, ConvertToInt32(parts[1]), ConvertToInt32(parts[2]), ConvertToInt32(parts[3]));
m_currentGroup = g;
}
else
{
m_currentGroup = null;
if (NntpReaderWriter.LastResponseCode == Rfc977ResponseCodes.NoSuchNewsgroup)
{
throw new NntpGroupNotSelectedException();
}
else
{
throw new NntpResponseException(Resource.ErrorMessage02, NntpReaderWriter.LastResponse);
}
}
}
/// <summary>
/// Sets the article cursor.
/// </summary>
/// <param name="direction">The direction.</param>
/// <returns></returns>
private ArticleResponseIds SetArticleCursor(string direction)
{
if (direction == null)
{
throw new ArgumentNullException("direction");
}
if (!(direction.Equals("LAST", StringComparison.InvariantCultureIgnoreCase) || direction.Equals("NEXT", StringComparison.InvariantCultureIgnoreCase)))
{
throw new ArgumentException(Resource.ErrorMessage03, "direction");
}
if (!CurrentGroupSelected)
{
throw new NntpGroupNotSelectedException();
}
ValidateConnectionState();
NntpReaderWriter.WriteCommand(direction);
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != Rfc977ResponseCodes.ArticleRetrievedTextSeparate)
{
throw new NntpResponseException(Resource.ErrorMessage04, NntpReaderWriter.LastResponse);
}
return(ArticleResponseIds.Parse(NntpReaderWriter.LastResponse));
}
/// <summary>
/// Closes this instance.
/// </summary>
public virtual void Close()
{
if (m_connection == null)
{
return;
}
try
{
if (m_connection.Connected)
{
NntpReaderWriter.WriteCommand("QUIT");
NntpReaderWriter.Dispose();
m_nntpStream = null;
m_connection.Close();
}
}
finally
{
try
{
m_connection.Close();
}
catch
{
}
m_connection = null;
}
}
/// <summary>
/// Posts the article.
/// </summary>
/// <param name="header">The header.</param>
/// <param name="body">The body.</param>
public virtual void PostArticle(IArticleHeaderEnumerator header, /*List*/ IEnumerable <string> body)
{
if (header == null)
{
throw new ArgumentNullException("header");
}
if (body == null)
{
throw new ArgumentNullException("body");
}
ValidateConnectionState();
NntpReaderWriter.WriteCommand("POST");
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != Rfc977ResponseCodes.SendArticleToPost)
{
throw new NntpResponseException(Resource.ErrorMessage06, NntpReaderWriter.LastResponse);
}
foreach (string key in header.HeaderKeys)
{
int count = 0;
foreach (string v in header[key])
{
if (count > 0)
{
NntpReaderWriter.Write("\t");
}
else
{
NntpReaderWriter.Write(key);
NntpReaderWriter.Write(": ");
}
NntpReaderWriter.WriteLine(v);
count++;
}
}
NntpReaderWriter.WriteLine("");
foreach (string s in body)
{
if (s.Length > 0 && s[0] == '.')
{
NntpReaderWriter.Write(".");
}
NntpReaderWriter.WriteLine(s);
}
NntpReaderWriter.WriteLine(".");
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != Rfc977ResponseCodes.ArticlePostedOk)
{
Console.WriteLine("resp: {0}", NntpReaderWriter.LastResponse);
throw new NntpResponseException(Resource.ErrorMessage07, NntpReaderWriter.LastResponse);
}
}
/// <summary>
/// Does the basic command. In the NNTP protocol, a command is sent and the server
/// possibly returns some text and finally is returns a response code. If a server
/// returned line equal a single "." we are done and nothing more is returned. If
/// the server returns a ".." (double period) the leading period is removed and the
/// remaining string is returned.
/// </summary>
/// <param name="command">The command.</param>
/// <param name="expectedResponseCode">The expected response code.</param>
/// <returns></returns>
protected IEnumerable <string> DoBasicCommand(string command, int expectedResponseCode)
{
ValidateConnectionState();
NntpReaderWriter.WriteCommand(command);
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != expectedResponseCode)
{
throw new NntpResponseException(NntpErrorMessages.ERROR_12, NntpReaderWriter.LastResponse);
}
do
{
string line = NntpReaderWriter.ReadLine();
if (line.Equals("."))
{
break;
}
else if (line.Length > 1)
{
if (line[0].Equals('.') && line[1].Equals('.'))
{
line = line.Substring(1);
}
}
yield return(line);
} while (true);
}
/// <summary>
/// Posts the article.
/// </summary>
/// <param name="header">The header.</param>
/// <param name="body">The body.</param>
public virtual void PostArticle(IArticleHeaderEnumerator header, List <string> body)
{
sb.Clear();
if (header == null)
{
throw new ArgumentNullException("header");
}
if (body == null)
{
throw new ArgumentNullException("body");
}
ValidateConnectionState();
NntpReaderWriter.WriteCommand("post");
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != Rfc977ResponseCodes.SendArticleToPost)
{
throw new NntpResponseException(NntpErrorMessages.ERROR_6, NntpReaderWriter.LastResponse);
}
foreach (string key in header.HeaderKeys)
{
int count = 0;
foreach (string v in header[key])
{
if (count > 0)
{
sb.Append("\t");
}
else
{
sb.Append(key);
sb.Append(": ");
}
sb.Append(v + NEWLINE);
count++;
}
}
sb.Append("" + NEWLINE);
foreach (string s in body)
{
if (s.Length > 0 && s[0] == '.')
{
sb.Append(".");
}
sb.Append(s + NEWLINE);
}
sb.Append("." + NEWLINE);
NntpReaderWriter.Write(sb.ToString());
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != Rfc977ResponseCodes.ArticlePostedOk)
{
throw new NntpResponseException(NntpErrorMessages.ERROR_7, NntpReaderWriter.LastResponse);
}
}
/// <summary>
/// Sends the slave command.
/// </summary>
public virtual void SendSlave()
{
ValidateConnectionState();
NntpReaderWriter.WriteLine("SLAVE");
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != Rfc977ResponseCodes.SlaveStatusNoted)
{
throw new NntpResponseException(Resource.ErrorMessage08, NntpReaderWriter.LastResponse);
}
}
/// <summary>
/// Sends the mode reader.
/// </summary>
public void SendModeReader()
{
NntpReaderWriter.WriteCommand("MODE READER");
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode == Rfc977ResponseCodes.ServerReadyPostingAllowed)
{
PostingAllowed = true;
}
else if (NntpReaderWriter.LastResponseCode == Rfc977ResponseCodes.ServerReadyNoPostingAllowed)
{
PostingAllowed = false;
}
else if (NntpReaderWriter.LastResponseCode == Rfc977ResponseCodes.CommandUnavailable)
{
throw new NntpException();
}
}
/// <summary>
/// Retrieves the statistics for an article based on the command.
/// </summary>
/// <param name="command">The command.</param>
/// <returns></returns>
protected virtual ArticleResponseIds RetrieveStatisticsCore(string command)
{
ValidateConnectionState();
if (!CurrentGroupSelected)
{
throw new NntpGroupNotSelectedException();
}
NntpReaderWriter.WriteCommand(command);
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != Rfc977ResponseCodes.ArticleRetrievedTextSeparate)
{
throw new NntpResponseException(Resource.ErrorMessage05, NntpReaderWriter.LastResponse);
}
return(ArticleResponseIds.Parse(NntpReaderWriter.LastResponse));
}
/// <summary>
/// Authenticates the user.
/// </summary>
/// <param name="userName">Name of the user.</param>
/// <param name="password">The password.</param>
public virtual void AuthenticateUser(string userName, string password)
{
NntpReaderWriter.WriteCommand("AUTHINFO USER " + userName);
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode == Rfc4643ResponseCodes.PasswordRequired)
{
NntpReaderWriter.WriteCommand("AUTHINFO PASS " + password);
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != Rfc4643ResponseCodes.AuthenticationAccepted)
{
throw new NntpNotAuthorizedException(Resource.ErrorMessage30);
}
}
else
{
throw new NntpNotAuthorizedException(Resource.ErrorMessage31);
}
}
/// <summary>
/// Authenticates the user.
/// </summary>
/// <param name="userName">Name of the user.</param>
/// <param name="password">The password.</param>
public virtual void AuthenticateUser(string userName, string password)
{
NntpReaderWriter.WriteCommand("authinfo user " + userName);
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode == Rfc4643ResponseCodes.PasswordRequired)
{
NntpReaderWriter.WriteCommand("authinfo pass " + password);
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode != Rfc4643ResponseCodes.AuthenticationAccepted)
{
throw new NntpNotAuthorizedException(NntpErrorMessages.ERROR_30);
}
}
else
{
throw new NntpNotAuthorizedException(NntpErrorMessages.ERROR_31);
}
}
/// <summary>
/// Connects using the specified host name and port number.
/// </summary>
/// <param name="hostName">Name of the host.</param>
/// <param name="port">The port.</param>
/// <param name="useSsl">Connect with SSL</param>
public virtual void Connect(string hostName, int port, bool useSsl)
{
Open(hostName, port, useSsl);
NntpReaderWriter.ReadResponse();
if (NntpReaderWriter.LastResponseCode == Rfc977ResponseCodes.ServerReadyPostingAllowed)
{
m_postingIsAllowed = true;
}
else if (NntpReaderWriter.LastResponseCode == Rfc977ResponseCodes.ServerReadyNoPostingAllowed)
{
m_postingIsAllowed = false;
}
else
{
throw new NntpResponseException(Resource.ErrorMessage01, NntpReaderWriter.LastResponse);
}
}
