/// <summary>
/// Start a client thread to send and receive data.
/// The caller is warned when a reply is received by a call to the specified function (<see cref="SendAsyncType"/>).
/// </summary>
/// <param name="sendAsync">Settings to start the thread</param>
/// <param name="request">The request as bytes array</param>
/// <param name="addSizeHeader">Indicates whether or not adding a size header when sending the request</param>
/// <param name="lineExchanges">Indicates whether (true) or not (false) the exchanges complete by a new line, not using the size header.
/// If set to true no buffer size is never used during the exchanges (present or not) and the EOT is always represented by a CR+LF.
/// Setting this parameter to true supersedes the addSizeHeader one</param>
/// <param name="EOT"></param>
/// <returns>A <see cref="CThread"/> object if the thread has been started, null otherwise</returns>
public static CThread SendAsync(SendAsyncType sendAsync, byte[] request, bool addSizeHeader, bool lineExchanges = false, string EOT = CStreamIO.CRLF)
{
if (null == sendAsync ||
null == sendAsync.Settings ||
!sendAsync.Settings.IsValid ||
null == request ||
0 == request.Length)
{
return(null);
}
try
{
// prepare working settings
ClientThreadType threadParams = new ClientThreadType()
{
SendAsync = sendAsync,
Request = request,
AddSizeHeader = addSizeHeader,
ClientOnly = null == sendAsync.OnReply,
LineExchanges = lineExchanges,
EOT = EOT,
};
// prepare the thread object
CThread thread = new CThread();
//if (thread.Start(SendAsyncThreadMethod, sendAsync.ThreadData, threadParams, null, sendAsync.OnTerminate, true))
if (thread.Start(SendAsyncThreadMethod, sendAsync.ThreadData, threadParams, null, true))
{
return(thread);
}
else
{
thread = null;
}
}
catch (Exception ex)
{
CLog.AddException($"{MethodBase.GetCurrentMethod().Module.Name}.{MethodBase.GetCurrentMethod().DeclaringType.Name}.{MethodBase.GetCurrentMethod().Name}", ex);
}
return(null);
}
private static int SendAsyncThreadMethod(CThread thread, object o)
{
SendAsyncEnum res = SendAsyncEnum.KO;
ClientThreadType threadParams = (ClientThreadType)o;
if (null != threadParams.SendAsync.OnReply)
{
// send & receive
if (threadParams.LineExchanges)
{
string reply = ConnectSendReceiveLine(threadParams.SendAsync.Settings, Encoding.UTF8.GetString(threadParams.Request), out bool error, threadParams.EOT);
if (string.IsNullOrEmpty(reply))
{
res = SendAsyncEnum.NoData;
}
else
{
// forward reply to the caller
if (threadParams.SendAsync.OnReply(Encoding.UTF8.GetBytes(reply), error, thread, threadParams.SendAsync.Parameters))
{
res = SendAsyncEnum.OK;
}
else
{
res = SendAsyncEnum.ReceiveError;
}
}
}
else
{
byte[] reply = ConnectSendReceive(threadParams.SendAsync.Settings, threadParams.Request, threadParams.AddSizeHeader, out int announcedSize, out bool error);
if (null == reply || 0 == reply.Length)
{
res = SendAsyncEnum.NoData;
}
else if (reply.Length != announcedSize)
{
res = SendAsyncEnum.ReceiveError;
}
else
{
// forward reply to the caller
if (threadParams.SendAsync.OnReply(reply, error, thread, threadParams.SendAsync.Parameters))
{
res = SendAsyncEnum.OK;
}
else
{
res = SendAsyncEnum.ReceiveError;
}
}
}
}
else
{
// send only
if (threadParams.LineExchanges)
{
if (ConnectSendLine(threadParams.SendAsync.Settings, Encoding.UTF8.GetString(threadParams.Request), threadParams.EOT))
{
res = SendAsyncEnum.OK;
}
else
{
res = SendAsyncEnum.SendError;
}
}
else
{
if (ConnectSend(threadParams.SendAsync.Settings, threadParams.Request, threadParams.AddSizeHeader))
{
res = SendAsyncEnum.OK;
}
else
{
res = SendAsyncEnum.SendError;
}
}
}
return((int)res);
}
