/// <summary>
/// Is called when POP3 server greeting reading has completed.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
/// <param name="connectCallback">Callback to be called to complete connect operation.</param>
private void ReadServerGreetingCompleted(SmartStream.ReadLineAsyncOP op,CompleteConnectCallback connectCallback)
{
Exception error = null;
try{
// Greeting reading failed, we are done.
if(op.Error != null){
error = op.Error;
}
// Greeting reading succeded.
else{
string line = op.LineUtf8;
// Log.
LogAddRead(op.BytesInBuffer,line);
// POP3 server accepted connection, get greeting text.
if(op.LineUtf8.StartsWith("+OK",StringComparison.InvariantCultureIgnoreCase)){
m_GreetingText = line.Substring(3).Trim();
// Try to read APOP hash key, if supports APOP.
if(line.IndexOf("<") > -1 && line.IndexOf(">") > -1){
m_ApopHashKey = line.Substring(line.IndexOf("<"),line.LastIndexOf(">") - line.IndexOf("<") + 1);
}
}
// POP3 server rejected connection.
else{
error = new POP3_ClientException(line);
}
}
}
catch(Exception x){
error = x;
}
// Complete TCP_Client connect operation.
connectCallback(error);
}
/// <summary>
/// Is called when POP3 server response reading has completed.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
private void AuthReadResponseCompleted(SmartStream.ReadLineAsyncOP op)
{
try{
// Operation failed.
if(op.Error != null){
m_pException = op.Error;
m_pPop3Client.LogAddException("Exception: " + op.Error.Message,op.Error);
SetState(AsyncOP_State.Completed);
}
// Operation succeeded.
else{
// Log
m_pPop3Client.LogAddRead(op.BytesInBuffer,op.LineUtf8);
// Authentication succeeded.
if(string.Equals(op.LineUtf8.Split(new char[]{' '},2)[0],"+OK",StringComparison.InvariantCultureIgnoreCase)){
// Start filling messages info.
POP3_Client.FillMessagesAsyncOP fillOP = new FillMessagesAsyncOP();
fillOP.CompletedAsync += delegate(object sender,EventArgs<FillMessagesAsyncOP> e){
FillMessagesCompleted(fillOP);
};
if(!m_pPop3Client.FillMessagesAsync(fillOP)){
FillMessagesCompleted(fillOP);
}
}
// Continue authenticating.
else if(op.LineUtf8.StartsWith("+")){
// + base64Data, we need to decode it.
byte[] serverResponse = Convert.FromBase64String(op.LineUtf8.Split(new char[]{' '},2)[1]);
byte[] clientResponse = m_pSASL.Continue(serverResponse);
// We need just send SASL returned auth-response as base64.
byte[] buffer = Encoding.UTF8.GetBytes(Convert.ToBase64String(clientResponse) + "\r\n");
// Log
m_pPop3Client.LogAddWrite(buffer.Length,Convert.ToBase64String(clientResponse));
// Start auth-data sending.
m_pPop3Client.TcpStream.BeginWrite(buffer,0,buffer.Length,this.AuthCommandSendingCompleted,null);
}
// Authentication rejected.
else{
m_pException = new POP3_ClientException(op.LineUtf8);
SetState(AsyncOP_State.Completed);
}
}
}
catch(Exception x){
m_pException = x;
m_pPop3Client.LogAddException("Exception: " + x.Message,x);
SetState(AsyncOP_State.Completed);
}
op.Dispose();
}
/// <summary>
/// Is called when POP3 server DELE response reading has completed.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
private void DeleReadResponseCompleted(SmartStream.ReadLineAsyncOP op)
{
try{
// Operation failed.
if(op.Error != null){
m_pException = op.Error;
m_pPop3Client.LogAddException("Exception: " + op.Error.Message,op.Error);
SetState(AsyncOP_State.Completed);
}
// Operation succeeded.
else{
// Log
m_pPop3Client.LogAddRead(op.BytesInBuffer,op.LineUtf8);
// Server returned success response.
if(string.Equals(op.LineUtf8.Split(new char[]{' '},2)[0],"+OK",StringComparison.InvariantCultureIgnoreCase)){
m_pOwner.m_IsMarkedForDeletion = true;
SetState(AsyncOP_State.Completed);
}
// Server returned error response.
else{
m_pException = new POP3_ClientException(op.LineUtf8);
SetState(AsyncOP_State.Completed);
}
}
}
catch(Exception x){
m_pException = x;
m_pPop3Client.LogAddException("Exception: " + x.Message,x);
SetState(AsyncOP_State.Completed);
}
op.Dispose();
}
