private void OnDataReceived(IAsyncResult asyn)
{
try
{
if (_isClosed)
{
SocketLogMgt.SetLog(SocketLogType.Warning, this, "Data received, but the socket is closed.");
return;
}
int bytesRead = _socket.EndReceive(asyn);
////------------Handle Multi-byte Charactor-------------
////Buffer all the bytes received and then decode this bytes at one time.
////in order to support multi byte charactor set (for example: utf-8)
////However, ASCII or GB or BIG5 or Unicode are easy,
////we can decode even bytes at each time.
//List<BufferWrapper> bufferList = new List<BufferWrapper>();
////----------------------------------------------------
do
{
bytesRead = _socket.Receive(_buffer);
SocketLogMgt.SetLog(this, _strSocketID + "Receive succeeded. " + bytesRead.ToString() + " bytes.");
UpdateActiveDT();
////------------Handle Multi-byte Charactor-------------
//bufferList.Add(BufferWrapper.Create(_buffer, bytesRead));
////foreach (BufferWrapper w in bufferList) SocketLogMgt.SetLog(">>>>>>>>>>>> " + w.Buffer.Length.ToString());
////----------------------------------------------------
if (bytesRead > 0)
{
////No matter how to cut the buffer, ASCII charactor can always be decoded properly,
////therefore we can use this segment to detect whether an ASCII charactor ending sign (for example "</XMLRequestMessage>") is received.
////See class XmlTest.FormCoding for unit test.
string str = _server.Encoder.GetString(_buffer, 0, bytesRead);
if (SocketLogMgt.DumpData)
{
SocketLogMgt.SetLog(this, _strSocketID + ": Data received.");
SocketLogMgt.SetLog(this, "------------------------");
SocketLogMgt.SetLog(this, str);
SocketLogMgt.SetLog(this, "------------------------");
}
string receiveData = str;
if (!string.IsNullOrEmpty(receiveData))
{
string sendData = null;
////------------Handle Multi-byte Charactor-------------
//receiveData = BufferWrapper.GetString(_server.Encoder, bufferList);
//bufferList.Clear();
////----------------------------------------------------
receiveData = SocketHelper.TrimMessageBlock(receiveData);
_server.NotifyRequest(receiveData, ref sendData);
ResponseData(sendData);
//// if allow multiple session per connection, then continue receiving till connection is closed by the client.
//if (_server.Config.AllowMultipleSessionPerConnection)
// continue;
//else
// break;
continue;
}
}
}while (bytesRead > 0);
// if(bytesRead==0) which means the connection is closed by the client, we will close the worker socket.
SocketLogMgt.SetLog(this, "Stop receiving data because the connection is closed by the client.");
CloseWorker();
}
catch (SocketException err)
{
//needToContinue = false;
SocketLogMgt.SetLastError(err);
// if client does not send data in some period of time and the connection will be expired
// (controled by the lower levels, and this exception occurs when the client send message again after the connection expired)
// or other network exception when receiving data, then close the server socket.
CloseWorker();
}
catch (Exception e)
{
SocketLogMgt.SetLastError(e);
// if communication is ok, but process message failed, do not need to close connection.
}
}
private SocketResult Send(SocketClientConfig config, string content)
{
SocketLogMgt.SetLog(this, "=============================================");
SocketLogMgt.SetLog(this, ": Send Data Begin.");
try
{
Socket socket = Connect(config);
if (socket == null)
{
return(SocketResult.Disconnect); // failed to connect to remote server
}
//string strSend = SocketHelper.PackMessageBlock(content);
string strSend = content;
if (SocketLogMgt.DumpData)
{
SocketLogMgt.SetLog(this, ": Data to be sent.");
SocketLogMgt.SetLog(this, "------------------------");
SocketLogMgt.SetLog(this, strSend);
SocketLogMgt.SetLog(this, "------------------------");
}
Byte[] bytesSent = null;
System.Text.Encoding encoder = GetEncoder();
if (encoder != null)
{
bytesSent = encoder.GetBytes(strSend);
}
if (bytesSent == null)
{
SocketLogMgt.SetLog(SocketLogType.Error, this, _socketID + "Encode data failed.");
return(SocketResult.SendFailed); // failed to encoding outgoing message
}
_allDone.Reset();
SocketLogMgt.SetLog(this, _socketID + "Send data.");
socket.BeginSend(bytesSent, 0, bytesSent.Length, 0, new AsyncCallback(OnDataSent), null);
bool rec = true;
string strReceived = null;
StringBuilder sb = new StringBuilder();
Byte[] bytesReceived = new Byte[config.ReceiveResponseBufferSizeKB * 1024];
while (rec)
{
if (!socket.Connected)
{
SocketLogMgt.SetLog(SocketLogType.Warning, this, _socketID + "Connection closed.");
break;
}
SocketLogMgt.SetLog(this, _socketID + "Receive data.");
int bytes = socket.Receive(bytesReceived, bytesReceived.Length, 0);
SocketLogMgt.SetLog(this, _socketID + "Receive succeeded. " + bytes.ToString() + " bytes.");
string str = encoder.GetString(bytesReceived, 0, bytes);
sb.Append(str);
strReceived = sb.ToString();
//rec = !SocketHelper.FindBlockEnding(strReceived);
rec = false;
// This socket client assume that there is a completed HL7 message (without MLLP signs) in one Receive();
}
_allDone.WaitOne(); // need not to set timeout here, we can depend on socket timeout of the Receive() method.
if (SocketLogMgt.DumpData)
{
SocketLogMgt.SetLog(this, ": Data received.");
SocketLogMgt.SetLog(this, "------------------------");
SocketLogMgt.SetLog(this, strReceived);
SocketLogMgt.SetLog(this, "------------------------");
}
//strReceived = SocketHelper.UnpackMessageBlock(strReceived);
strReceived = SocketHelper.TrimMessageBlock(strReceived);
return(new SocketResult(SocketResultType.Success, strReceived)); // send and receive success
}
catch (SocketException se)
{
SocketLogMgt.SetLastError(this, se);
SocketResult ret = new SocketResult(se);
ret.Type = SocketResultType.Unknown;
return(ret);
// meet exception during sending or receiving
// (for example, it may be caused by the connection has expired [controled by the lower levels]
// after some period of time without sending or receving),
// and we need to recreate a new connection and try again,
// please see SendData() for details.
}
catch (Exception err)
{
SocketLogMgt.SetLastError(this, err);
return(new SocketResult(err));
}
finally
{
SocketLogMgt.SetLog(this, ": Send Data End");
SocketLogMgt.SetLog(this, "=============================================\r\n");
}
}
public SocketResult SendData(SocketClientConfig config, string content)
{
SocketResult result = SocketResult.Empty;
try
{
SocketLogMgt.SetLog(this, "=============================================");
SocketLogMgt.SetLog(this, ": Send Data Begin.");
SocketLogMgt.SetLog(this, config);
//string strSend = SocketHelper.PackMessageBlock(content);
string strSend = content;
if (SocketLogMgt.DumpData)
{
SocketLogMgt.SetLog(this, ": Data to be sent.");
SocketLogMgt.SetLog(this, "------------------------");
SocketLogMgt.SetLog(this, strSend);
SocketLogMgt.SetLog(this, "------------------------");
}
Byte[] bytesSent = null;
System.Text.Encoding encoder = SocketHelper.GetEncoder(config);
if (encoder != null)
{
bytesSent = encoder.GetBytes(strSend);
}
if (bytesSent == null)
{
SocketLogMgt.SetLog(SocketLogType.Error, this, "Encode data failed.");
return(SocketResult.SendFailed);
}
Byte[] bytesReceived = new Byte[config.ReceiveResponseBufferSizeKB * 1024];
SocketLogMgt.SetLog(this, ": Socket prepared.");
SocketLogMgt.SetLog(this, "------------------------");
string strReceived = null;
StringBuilder sb = new StringBuilder();
IPEndPoint ipe = new IPEndPoint(IPAddress.Parse(config.IPAddress), config.Port);
using (Socket socket = new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp))
{
int id = SocketHelper.GetNewSocketID();
string strID = "(" + id.ToString() + ") ";
//socket.NoDelay = true;
socket.SendTimeout = config.SendTimeout;
socket.ReceiveTimeout = config.ReceiveTimeout;
SocketLogMgt.SetLog(this, strID + "Socket created.");
socket.Connect(ipe);
if (socket.Connected)
{
SocketLogMgt.SetLog(this, strID + "Socket connected.");
}
else
{
SocketLogMgt.SetLog(SocketLogType.Warning, this, strID + "Connection failed.");
return(SocketResult.Disconnect);
}
_allDone.Reset();
SocketLogMgt.SetLog(this, strID + "Send data.");
socket.BeginSend(bytesSent, 0, bytesSent.Length, 0,
new AsyncCallback(OnDataSent), new SocketWrapper(strID, socket));
bool rec = true;
while (rec)
{
if (!socket.Connected)
{
SocketLogMgt.SetLog(SocketLogType.Warning, this, strID + "Connection closed.");
break;
}
SocketLogMgt.SetLog(this, strID + "Receive data.");
int bytes = socket.Receive(bytesReceived, bytesReceived.Length, 0);
SocketLogMgt.SetLog(this, strID + "Receive succeeded. " + bytes.ToString() + " bytes.");
string str = encoder.GetString(bytesReceived, 0, bytes);
sb.Append(str);
strReceived = sb.ToString();
//rec = !SocketHelper.FindBlockEnding(strReceived);
rec = false;
// This socket client assume that there is a completed HL7 message (without MLLP signs) in one Receive();
}
_allDone.WaitOne(); // need not to set timeout here, we can depend on socket timeout of the Receive() method.
socket.Shutdown(SocketShutdown.Both);
socket.Close();
SocketLogMgt.SetLog(this, strID + "Socket disconnected.");
}
SocketLogMgt.SetLog(this, "------------------------");
if (SocketLogMgt.DumpData)
{
SocketLogMgt.SetLog(this, ": Data received.");
SocketLogMgt.SetLog(this, "------------------------");
SocketLogMgt.SetLog(this, strReceived);
SocketLogMgt.SetLog(this, "------------------------");
}
//strReceived = SocketHelper.UnpackMessageBlock(strReceived);
strReceived = SocketHelper.TrimMessageBlock(strReceived);
result = new SocketResult(SocketResultType.Success, strReceived);
}
catch (Exception err)
{
SocketLogMgt.SetLastError(this, err);
result = new SocketResult(err);
}
SocketLogMgt.SetLog(this, ": Send Data End");
SocketLogMgt.SetLog(this, "=============================================\r\n");
return(result);
}
private void OnDataReceived(IAsyncResult asyn)
{
try
{
int bytesRead = _socket.EndReceive(asyn);
////------------Handle Multi-byte Charactor-------------
////Buffer all the bytes received and then decode this bytes at one time.
////in order to support multi byte charactor set (for example: utf-8)
////However, ASCII or GB or BIG5 or Unicode are easy,
////we can decode even bytes at each time.
//List<BufferWrapper> bufferList = new List<BufferWrapper>();
////----------------------------------------------------
do
{
// This socket worker assume that there is a completed HL7 message (without MLLP signs) in one Receive();
bytesRead = _socket.Receive(_buffer);
SocketLogMgt.SetLog(this, _strSocketID + "Receive succeeded. " + bytesRead.ToString() + " bytes.");
UpdateActiveDT();
////------------Handle Multi-byte Charactor-------------
//bufferList.Add(BufferWrapper.Create(_buffer, bytesRead));
////foreach (BufferWrapper w in bufferList) SocketLogMgt.SetLog(">>>>>>>>>>>> " + w.Buffer.Length.ToString());
////----------------------------------------------------
if (bytesRead > 0)
{
////No matter how to cut the buffer, ASCII charactor can always be decoded properly,
////therefore we can use this segment to detect whether an ASCII charactor ending sign (for example "</XMLRequestMessage>") is received.
////See class XmlTest.FormCoding for unit test.
string str = _server.Encoder.GetString(_buffer, 0, bytesRead);
if (SocketLogMgt.DumpData)
{
SocketLogMgt.SetLog(this, _strSocketID + ": Data received.");
SocketLogMgt.SetLog(this, "------------------------");
SocketLogMgt.SetLog(this, str);
SocketLogMgt.SetLog(this, "------------------------");
}
string receiveData = str;
if (!string.IsNullOrEmpty(receiveData))
{
string sendData = null;
////------------Handle Multi-byte Charactor-------------
//receiveData = BufferWrapper.GetString(_server.Encoder, bufferList);
//bufferList.Clear();
////----------------------------------------------------
receiveData = SocketHelper.TrimMessageBlock(receiveData);
_server.NotifyRequest(receiveData, ref sendData);
ResponseData(sendData);
break;
}
}
}while (bytesRead > 0);
}
catch (Exception e)
{
SocketLogMgt.SetLastError(e);
// if communication is ok, but process message failed, do not need to close connection.
}
}
