Sending large serialized objects over sockets is failing only when trying to grow the byte Array, bu
- by FinancialRadDeveloper
I have code where I am trying to grow the byte array while receiving the data over my socket. This is erroring out.
public bool ReceiveObject2(ref Object objRec, ref string sErrMsg)
{
try
{
byte[] buffer = new byte[1024];
byte[] byArrAll = new byte[0];
bool bAllBytesRead = false;
int iRecLoop = 0;
// grow the byte array to match the size of the object, so we can put whatever we
// like through the socket as long as the object serialises and is binary formatted
while (!bAllBytesRead)
{
if (m_socClient.Receive(buffer) > 0)
{
byArrAll = Combine(byArrAll, buffer);
iRecLoop++;
}
else
{
m_socClient.Close();
bAllBytesRead = true;
}
}
MemoryStream ms = new MemoryStream(buffer);
BinaryFormatter bf1 = new BinaryFormatter();
ms.Position = 0;
Object obj = bf1.Deserialize(ms);
objRec = obj;
return true;
}
catch (System.Runtime.Serialization.SerializationException se)
{
objRec = null;
sErrMsg += "SocketClient.ReceiveObject " + "Source " + se.Source + "Error : " + se.Message;
return false;
}
catch (Exception e)
{
objRec = null;
sErrMsg += "SocketClient.ReceiveObject " + "Source " + e.Source + "Error : " + e.Message;
return false;
}
}
private byte[] Combine(byte[] first, byte[] second)
{
byte[] ret = new byte[first.Length + second.Length];
Buffer.BlockCopy(first, 0, ret, 0, first.Length);
Buffer.BlockCopy(second, 0, ret, first.Length, second.Length);
return ret;
}
Error: mscorlibError : The input stream is not a valid binary format. The starting contents (in bytes) are: 68-61-73-43-68-61-6E-67-65-73-3D-22-69-6E-73-65-72 ...
Yet when I just cheat and use a MASSIVE buffer size its fine.
public bool ReceiveObject(ref Object objRec, ref string sErrMsg)
{
try
{
byte[] buffer = new byte[5000000];
m_socClient.Receive(buffer);
MemoryStream ms = new MemoryStream(buffer);
BinaryFormatter bf1 = new BinaryFormatter();
ms.Position = 0;
Object obj = bf1.Deserialize(ms);
objRec = obj;
return true;
}
catch (Exception e)
{
objRec = null;
sErrMsg += "SocketClient.ReceiveObject " + "Source " + e.Source + "Error : " + e.Message;
return false;
}
}
This is really killing me. I don't know why its not working. I have lifted the Combine from a suggestion on here too, so I am pretty sure this is not doing the wrong thing?
I hope someone can point out where I am going wrong
