private static PandaPacket getLabelDataResponse(string clientID, PandaPacket request)
{
//
PandaPacket response = null;
DataSet ds = null;
try {
//Extract message body
string barcode1 = request.MessageBody.Substring(0, 32).TrimEnd();
string barcode2 = request.MessageBody.Substring(32, 32).TrimEnd();
string barcode3 = request.MessageBody.Substring(64, 32).TrimEnd();
string barcode4 = request.MessageBody.Substring(96, 32).TrimEnd();
string barcode5 = request.MessageBody.Substring(128, 32).TrimEnd();
string barcode6 = request.MessageBody.Substring(160, 32).TrimEnd();
float weight = Convert.ToInt32(request.MessageBody.Substring(192, 5)) / 100;
//Process the label data request
ds = CartonMgr.ProcessLabelDataRequest(barcode1, barcode2, barcode3, barcode4, barcode5, barcode6, weight);
if (ds != null)
{
//New carton
response = PandaPacket.Encode(clientID, RESPONSE_LABELDATA, request, 0, 1, PandaPacket.FormatLabelDataMessageBody(ds.Tables["PandATable"].Rows[0]["CartonID"].ToString(), int.Parse(ds.Tables["PandATable"].Rows[0]["StatusCode"].ToString()), ds.Tables["PandATable"].Rows[0]["LabelData"].ToString()));
}
}
catch (Exception ex) {
AppTrace.Instance().TheTrace.WriteLine(new TraceMessage("Error occurred while processing request for label data- " + ex.ToString(), AppLib.EVENTLOGNAME, LogLevel.Error, "PacketMgr"));
if (ds != null)
{
response = PandaPacket.Encode(clientID, RESPONSE_LABELDATA, request, 0, 1, PandaPacket.FormatLabelDataMessageBody(ds.Tables["PandATable"].Rows[0]["CartonID"].ToString(), int.Parse(ds.Tables["PandATable"].Rows[0]["StatusCode"].ToString()), ds.Tables["PandATable"].Rows[0]["LabelData"].ToString()));
}
}
return(response);
}
private static PandaPacket getHeartbeatResponse(string clientID, PandaPacket request)
{
//Reply with a heartbeat signal
PandaPacket response = null;
try {
response = PandaPacket.Encode(clientID, RESPONSE_HEARTBEAT, request, 0, 1, "");
}
catch (Exception ex) {
AppTrace.Instance().TheTrace.WriteLine(new TraceMessage("An error occurred while processing request for heartbeat." + ex.ToString(), AppLib.EVENTLOGNAME, LogLevel.Error, "PacketMgr"));
}
return(response);
}
private static PandaPacket getVerifyLabelResponse(string clientID, PandaPacket request)
{
//Verify the requested carton
PandaPacket response = null;
try {
//Find the carton
string cartonID = request.MessageBody.Substring(0, PandaPacket.CartonIDLength).TrimEnd();
string verifyCode = request.MessageBody.Substring(PandaPacket.CartonIDLength, 1).TrimEnd();
string verifyFlag = CartonMgr.ProcessVerifyLabelRequest(cartonID, verifyCode);
response = PandaPacket.Encode(clientID, RESPONSE_VERIFYLABEL, request, 0, 1, verifyFlag);
}
catch (Exception ex) {
AppTrace.Instance().TheTrace.WriteLine(new TraceMessage("An error occurred while processing request to verify label." + ex.ToString(), AppLib.EVENTLOGNAME, LogLevel.Error, "PacketMgr"));
response = PandaPacket.Encode(clientID, RESPONSE_VERIFYLABEL, request, 0, 1, "N");
}
return(response);
}
public static byte[] ProcessPandARequest(string clientID, byte[] bytes)
{
//Process a PandA request from a remote socket client
PandaPacket request = null;
PandaPacket response = null;
DateTime started = DateTime.Now;
try {
//Process the message
request = PandaPacket.Decode(clientID, bytes);
AppTrace.Instance().TheTrace.WriteLine(new TraceMessage("REQUEST:" + request.Message, AppLib.EVENTLOGNAME, LogLevel.Information, "PacketMgr"));
if (request.Valid)
{
//Check if this was a prior request
PandaPacket priorResponse = isPriorRequest(clientID, request);
if (priorResponse != null)
{
//This was a prior message; return prior response
response = priorResponse;
AppTrace.Instance().TheTrace.WriteLine(new TraceMessage("PRIOR RESPONSE: " + priorResponse.Message, AppLib.EVENTLOGNAME, LogLevel.Information, "PacketMgr"));
}
else
{
//New, valid message; persist request and route to message handler
switch (request.MessageCode)
{
case REQUEST_LABELDATA:
response = getLabelDataResponse(clientID, request);
LastRequest = request;
try { request.ProcessingTime = ((TimeSpan)DateTime.Now.Subtract(started)).TotalSeconds; } catch {}
if (LabelDataRequestComplete != null)
{
LabelDataRequestComplete(null, new PandaPacketEventArgs(request));
}
break;
case REQUEST_VERIFYLABEL:
response = getVerifyLabelResponse(clientID, request);
LastRequest = request;
try { request.ProcessingTime = ((TimeSpan)DateTime.Now.Subtract(started)).TotalSeconds; } catch {}
if (VerifyLabelRequestComplete != null)
{
VerifyLabelRequestComplete(null, new PandaPacketEventArgs(request));
}
break;
case REQUEST_HEARTBEAT:
response = getHeartbeatResponse(clientID, request);
if (HeartbeatRequestComplete != null)
{
HeartbeatRequestComplete(null, EventArgs.Empty);
}
break;
case REQUEST_RESEND:
response = LastRequest.Response;
AppTrace.Instance().TheTrace.WriteLine(new TraceMessage("Resend requested.", AppLib.EVENTLOGNAME, LogLevel.Warning, "PacketMgr"));
if (ResendRequestComplete != null)
{
ResendRequestComplete(null, EventArgs.Empty);
}
break;
default:
AppTrace.Instance().TheTrace.WriteLine(new TraceMessage("Unknown message code.", AppLib.EVENTLOGNAME, LogLevel.Warning, "PacketMgr"));
break;
}
}
}
else
{
//Invalid message packet
response = PandaPacket.Encode(clientID, RESPONSE_MSGERROR, request, 0, 0, "");
AppTrace.Instance().TheTrace.WriteLine(new TraceMessage("Message failed (decode) validation...", AppLib.EVENTLOGNAME, LogLevel.Warning, "PacketMgr"));
}
}
catch (Exception ex) {
response = PandaPacket.Encode(clientID, RESPONSE_MSGERROR, request, 0, 0, "");
AppTrace.Instance().TheTrace.WriteLine(new TraceMessage("Error occurred while processing message: " + ex.ToString(), AppLib.EVENTLOGNAME, LogLevel.Error, "PacketMgr"));
}
return(response != null?response.Bytes:null);
}