protected virtual Pop3Response DoCommand(IPOP3Command command)
{
Pop3Response response;
if (command == null)
{
throw new ArgumentNullException("command");
}
try
{
response = command.Interact(this._connection);
}
catch (Exception exception)
{
this.HandleException(exception);
if (exception is IOException)
{
if (Login().Type == EPop3ResponseType.OK)
{
return(DoCommand(command));
}
}
throw;
}
return(response);
}
public virtual Pop3Response Login()
{
Pop3Client client7;
this._connection = this._connectionFactory.GetConnection(this._configurationProvider);
lock (this)
{
if (this.State != EPop3ClientState.Awaiting)
{
throw new InvalidOperationException("Pop3Client doesn't allow executing multiple operations simulteneously in a few threads using one object");
}
this.State = EPop3ClientState.Busy;
}
if (this.ConnectionState == EPop3ConnectionState.Connected)
{
lock (this)
{
this.State = EPop3ClientState.Awaiting;
}
return(new Pop3Response("+OK"));
}
try
{
this._connection.Open();
}
catch (Exception exception)
{
this.HandleException(exception);
throw;
}
if (this._connection.State == EConnectionState.Connected)
{
this.ConnectionState = EPop3ConnectionState.Connected;
if (this.Connected != null)
{
this.Connected(this);
}
}
Pop3Response response = new Pop3Response(this._connection.ReceiveLine());
if (response.Type != EPop3ResponseType.OK)
{
goto Label_03F9;
}
CAPA capa = new CAPA();
Pop3Response response2 = this.DoCommand(capa);
if (this._configurationProvider.SSLInteractionType == EInteractionType.StartTLS)
{
Pop3Response response3 = this.DoCommand(new STLS());
if (response3.Type != EPop3ResponseType.OK)
{
return(response3);
}
}
IPOP3Command command = null;
if ((this.AuthenticationType == EAuthenticationType.Auto) && ((response2.Type == EPop3ResponseType.ERR) || !capa.Commands.ContainsKey("SASL")))
{
command = new AuthStandart(this.Username, this.Password);
}
else
{
string str2 = string.Empty;
switch (this.AuthenticationType)
{
case EAuthenticationType.Auto:
{
bool flag = false;
if (str2.Contains("PLAIN"))
{
command = new AuthPlain(this.Username, this.Password);
flag = true;
}
if (str2.Contains("LOGIN"))
{
command = new AuthStandart(this.Username, this.Password);
flag = true;
}
if (!flag)
{
command = new AuthStandart(this.Username, this.Password);
}
goto Label_03C9;
}
case EAuthenticationType.Plain:
if (!str2.Contains("PLAIN"))
{
lock (this)
{
this.State = EPop3ClientState.Awaiting;
}
throw new AuthenticationMethodNotSupportedException("Selected authentication method is not supported by the server");
}
command = new AuthPlain(this.Username, this.Password);
goto Label_03C9;
case EAuthenticationType.Login:
if (!str2.Contains("LOGIN"))
{
lock (this)
{
this.State = EPop3ClientState.Awaiting;
}
throw new AuthenticationMethodNotSupportedException("Selected authentication method is not supported by the server");
}
command = new AuthLogin(this.Username, this.Password);
goto Label_03C9;
}
}
Label_03C9:
if (command != null)
{
response = this.DoCommand(command);
}
if (response.Type == EPop3ResponseType.OK)
{
this.ConnectionState = EPop3ConnectionState.Authenticated;
if (this.Authenticated != null)
{
this.Authenticated(this);
}
}
Label_03F9:
Monitor.Enter(client7 = this);
try
{
this.State = EPop3ClientState.Awaiting;
}
finally
{
Monitor.Exit(client7);
}
return(response);
}