private async Task <Pop3> Connect(UserInfo userInfo)
{
var timeout = _settings.ConnectionTimeOutMilliseconds;
Task timeoutTask = Task.Delay(timeout);
var connectionTask = Task.Run(() =>
{
Pop3 pop3 = _pop3Factory.GetInstance();
if (userInfo.EncryptionType == Model.Enum.EncryptionType.Unencrypted)
{
pop3.Connect(userInfo.Server, userInfo.Port);
}
else if (userInfo.EncryptionType == Model.Enum.EncryptionType.SslTls)
{
pop3.ConnectSSL(userInfo.Server, userInfo.Port);
}
else
{
pop3.Connect(userInfo.Server, userInfo.Port);
pop3.StartTLS();
}
pop3.UseBestLogin(userInfo.UserName, userInfo.Password);
return(pop3);
});
var completedTask = await Task.WhenAny(connectionTask, timeoutTask);
if (completedTask == connectionTask)
{
return(await connectionTask);
}
else
{
throw new TimeoutException("Connection with the server timed out");
}
}
