/// <summary>
/// Login to specified Imap host and port
/// </summary>
/// <param name="sHost">Imap server name</param>
/// <param name="nPort">Imap server port</param>
/// <param name="sUserId">User's login id</param>
/// <param name="sPassword">User's password</param>
/// <param name="sslEnabled"> </param>
/// <exception cref="IMAP_ERR_LOGIN"
/// <exception cref="IMAP_ERR_INVALIDPARAM"
public void Login(string sHost, ushort nPort, string sUserId, string sPassword, bool sslEnabled=false )
{
ImapResponseEnum eImapResponse = ImapResponseEnum.IMAP_SUCCESS_RESPONSE;
ImapException e_login = new ImapException (ImapException.ImapErrorEnum.IMAP_ERR_LOGIN, m_sUserId);
ImapException e_invalidparam = new ImapException(ImapException.ImapErrorEnum.IMAP_ERR_INVALIDPARAM);
if (sHost.Length == 0)
{
log.Error ("Invalid Host name");
throw e_invalidparam;
}
if (sUserId.Length == 0)
{
log.Error ("Invalid User Id");
throw e_invalidparam;
}
if (sPassword.Length == 0)
{
log.Error ("Invalid password");
throw e_invalidparam;
}
if (m_bIsConnected)
{
if (m_bIsLoggedIn)
{
if (m_sHost == sHost && m_nPort == nPort)
{
if (m_sUserId == sUserId &&
m_sPassword == sPassword )
{
log.Info ("Connected and Logged in already");
return;
}
else
LogOut();
}
else Disconnect();
}
}
m_bIsConnected = false;
m_bIsLoggedIn = false;
try
{
eImapResponse = Connect(sHost, nPort, sslEnabled);
if (eImapResponse == ImapResponseEnum.IMAP_SUCCESS_RESPONSE)
{
m_bIsConnected = true;
}
else return;
}
catch (Exception e)
{
throw e;
}
ArrayList asResultArray = new ArrayList();
string sCommand = IMAP_LOGIN_COMMAND;
sCommand += " " + sUserId + " " + sPassword;
sCommand += IMAP_COMMAND_EOL;
try
{
eImapResponse = SendAndReceive(sCommand, ref asResultArray);
if (eImapResponse == ImapResponseEnum.IMAP_SUCCESS_RESPONSE)
{
m_bIsLoggedIn = true;
m_sUserId = sUserId;
m_sPassword = sPassword;
}
else throw e_login;
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// Restore the connection using available old data
/// Select the sFolder if previously selected
/// </summary>
/// <param name="bSelectFolder">If true then it selects the folder</param>
void Restore(bool bSelectFolder)
{
ImapException e_insufficiantdata = new ImapException(ImapException.ImapErrorEnum.IMAP_ERR_INSUFFICIENT_DATA);
if (m_sHost.Length == 0 ||
m_sUserId.Length == 0||
m_sPassword.Length == 0)
{
throw e_insufficiantdata;
}
try
{
m_bIsLoggedIn = false;
Login(m_sHost, m_nPort, m_sUserId, m_sPassword);
if (bSelectFolder && m_sMailboxName.Length > 0)
{
if (m_bIsFolderSelected)
{
m_bIsFolderSelected = false;
SelectFolder(m_sMailboxName);
}
else if (m_bIsFolderExamined)
{
m_bIsFolderExamined = false;
ExamineFolder(m_sMailboxName);
}
else SelectFolder(m_sMailboxName);
}
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// Connect to specified host and port
/// </summary>
/// <param name="sHost">Imap host</param>
/// <param name="nPort">Imap port</param>
/// <param name="sslEnabled"> </param>
/// <returns>ImapResponseEnum type</returns>
protected ImapResponseEnum Connect(string sHost, ushort nPort, bool sslEnabled = false)
{
IMAP_COMMAND_VAL = 0;
ImapResponseEnum eImapResponse = ImapResponseEnum.IMAP_SUCCESS_RESPONSE;
ImapException e_connect = new ImapException(ImapException.ImapErrorEnum.IMAP_ERR_CONNECT, sHost);
try
{
m_oImapServ = new TcpClient(sHost, nPort);
if (sslEnabled)
{
var sslStrm = new SslStream(m_oImapServ.GetStream(), false, new RemoteCertificateValidationCallback(ValidateServerCertificate), null);
//m_SSLStream.ReadTimeout = 30000;
try
{
sslStrm.AuthenticateAsClient(sHost);
}
catch (AuthenticationException e)
{
Console.WriteLine("Exception: {0}", e.Message);
if (e.InnerException != null)
{
Console.WriteLine("Inner exception: {0}", e.InnerException.Message);
}
Console.WriteLine("Authentication failed - closing the connection.");
m_oImapServ.Close();
return(ImapResponseEnum.IMAP_FAILURE_RESPONSE);
}
m_oNetStrm = (Stream)sslStrm;
m_oRdStrm = new StreamReader(sslStrm);
}
else
{
m_oNetStrm = m_oImapServ.GetStream();
m_oRdStrm = new StreamReader(m_oImapServ.GetStream());
}
string sResult = m_oRdStrm.ReadLine();
if ((sResult.StartsWith(IMAP_OK_SERVER_RESPONSE) == true) || (sResult.StartsWith(IMAP_CAPABILITY_SERVER_RESPONSE) == true))
{
Log(LogTypeEnum.IMAP, sResult);
eImapResponse = ImapResponseEnum.IMAP_SUCCESS_RESPONSE;
Capability();
}
else
{
Log(LogTypeEnum.IMAP, sResult);
eImapResponse = ImapResponseEnum.IMAP_FAILURE_RESPONSE;
}
}
catch
{
throw e_connect;
}
m_sHost = sHost;
m_nPort = nPort;
m_bSSLEnabled = sslEnabled;
return(eImapResponse);
}
/// <summary>
/// Examine the sFolder/mailbox after login
/// </summary>
/// <param name="sFolder">Mailbox folder</param>
public void ExamineFolder(string sFolder)
{
if (!m_bIsLoggedIn)
{
try
{
Restore(false);
}
catch (ImapException e)
{
if (e.Type != ImapException.ImapErrorEnum.IMAP_ERR_INSUFFICIENT_DATA)
throw e;
throw new ImapException(ImapException.ImapErrorEnum.IMAP_ERR_NOTCONNECTED);
}
}
ImapResponseEnum eImapResponse = ImapResponseEnum.IMAP_SUCCESS_RESPONSE;
ImapException e_examine = new ImapException (ImapException.ImapErrorEnum.IMAP_ERR_EXAMINE, sFolder);
ImapException e_invalidparam = new ImapException(ImapException.ImapErrorEnum.IMAP_ERR_INVALIDPARAM);
if (sFolder.Length == 0)
{
throw e_invalidparam;
}
if (m_bIsFolderExamined)
{
if (m_sMailboxName == sFolder)
{
log.Info("Folder is already selected");
return;
}
else m_bIsFolderExamined = false;
}
ArrayList asResultArray = new ArrayList();
string sCommand = IMAP_EXAMINE_COMMAND;
sCommand += " " + sFolder +IMAP_COMMAND_EOL;
try
{
eImapResponse = SendAndReceive(sCommand, ref asResultArray);
if (eImapResponse == ImapResponseEnum.IMAP_SUCCESS_RESPONSE)
{
m_sMailboxName = sFolder;
m_bIsFolderExamined = true;
}
else throw e_examine;
}
catch (Exception e)
{
throw e;
}
//-------------------------
// PARSE RESPONSE
bool bResult = false;
foreach (string sLine in asResultArray)
{
// If this is an unsolicited response starting with '*'
if (sLine.IndexOf(IMAP_UNTAGGED_RESPONSE_PREFIX) != -1)
{
// parse the line by space
string [] asTokens;
asTokens = sLine.Split(' ');
if (asTokens[2] == "EXISTS")
{
// The line will look like "* 2 EXISTS"
m_nTotalMessages = Convert.ToInt32(asTokens[1]);
}
else if (asTokens[2] == "RECENT")
{
// The line will look like "* 2 RECENT"
m_nRecentMessages = Convert.ToInt32(asTokens[1]);
}
else if (asTokens[2] == "[UNSEEN")
{
// The line will look like "* OK [UNSEEN 2]"
string sUIDPart = asTokens[3].Substring(0, asTokens[3].Length-1);
m_nFirstUnSeenMsgUID = Convert.ToInt32(sUIDPart);
}
}
// If this line looks like "<command-tag> OK ..."
else if (sLine.IndexOf(IMAP_SERVER_RESPONSE_OK) != -1)
{
bResult = true;
break;
}
}
if (!bResult)
throw e_examine;
string sLogStr = "TotalMessages[" + m_nTotalMessages.ToString() + "] ,";
sLogStr += "RecentMessages[" + m_nRecentMessages.ToString() + "] ,";
if (m_nFirstUnSeenMsgUID > 0 )
sLogStr += "FirstUnSeenMsgUID[" + m_nFirstUnSeenMsgUID.ToString() + "] ,";
//Log(LogTypeEnum.INFO, sLogStr);
}
/// <summary>
/// Connect to specified host and port
/// </summary>
/// <param name="sHost">Imap host</param>
/// <param name="nPort">Imap port</param>
/// <param name="sslEnabled"> </param>
/// <returns>ImapResponseEnum type</returns>
protected ImapResponseEnum Connect(string sHost, ushort nPort, bool sslEnabled=false)
{
IMAP_COMMAND_VAL = 0;
ImapResponseEnum eImapResponse = ImapResponseEnum.IMAP_SUCCESS_RESPONSE;
ImapException e_connect = new ImapException (ImapException.ImapErrorEnum.IMAP_ERR_CONNECT, sHost);
try
{
m_oImapServ = new TcpClient(sHost, nPort);
if(sslEnabled)
{
var sslStrm = new SslStream(m_oImapServ.GetStream(), false, new RemoteCertificateValidationCallback(ValidateServerCertificate), null);
//m_SSLStream.ReadTimeout = 30000;
try
{
sslStrm.AuthenticateAsClient(sHost);
}
catch (AuthenticationException e)
{
Console.WriteLine("Exception: {0}", e.Message);
if (e.InnerException != null)
{
Console.WriteLine("Inner exception: {0}", e.InnerException.Message);
}
Console.WriteLine("Authentication failed - closing the connection.");
m_oImapServ.Close();
return ImapResponseEnum.IMAP_FAILURE_RESPONSE;
}
m_oNetStrm = (Stream) sslStrm;
m_oRdStrm = new StreamReader(sslStrm);
}else
{
m_oNetStrm = m_oImapServ.GetStream();
m_oRdStrm = new StreamReader(m_oImapServ.GetStream());
}
string sResult = m_oRdStrm.ReadLine();
if ((sResult.StartsWith(IMAP_OK_SERVER_RESPONSE) == true) || (sResult.StartsWith(IMAP_CAPABILITY_SERVER_RESPONSE) == true))
{
Log (LogTypeEnum.IMAP, sResult);
eImapResponse = ImapResponseEnum.IMAP_SUCCESS_RESPONSE;
Capability();
}
else
{
Log (LogTypeEnum.IMAP, sResult);
eImapResponse = ImapResponseEnum.IMAP_FAILURE_RESPONSE;
}
}
catch
{
throw e_connect;
}
m_sHost = sHost;
m_nPort = nPort;
m_bSSLEnabled = sslEnabled;
return eImapResponse;
}