A ICAP client code in C# to virus scan a file using Symantec Scan Server

public class VirusCheck
{
private string retDesc;
private Socket soc;

public string ReturnDescription
{
get { return retDesc; }
set { retDesc = value; }
}

public VirusCheck()
{
soc = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
}

public int ScanStream(string scanServer, int scanPort, string fileName, byte[] fileStream)
{
byte[] buffer = new byte[1024];
int iRx;
try
{
if (scanPort == 0)
scanPort = 1344;
System.Net.IPAddress remoteIPAddress = System.Net.IPAddress.Parse(scanServer);
System.Net.IPEndPoint remoteEndPoint = new System.Net.IPEndPoint(remoteIPAddress, scanPort);
soc.Connect(remoteEndPoint);
if (soc.Connected)
{
string cmd = “RESPMOD icap://” + scanServer + “:” + scanPort + “/AVSCAN ICAP/1.0\n”;
cmd = cmd + “Host: ” + scanServer + “:” + scanPort + “\n”;
cmd = cmd + “Allow: 204\n”;
cmd = cmd + “Encapsulated: req-hdr=0, res-hdr=84, res-body=131\n”;
cmd = cmd + “\n”;
cmd = cmd + “GET http://” + scanServer + “/” + fileName + ” HTTP/1.1\n”;
cmd = cmd + “Host: ” + scanServer + “\n”;
cmd = cmd + “\n”;
cmd = cmd + “HTTP/1.1 200 OK\n”;
cmd = cmd + “Transfer-Encoding: chunked\n”;
cmd = cmd + “\n”;
cmd = cmd + String.Format(“{0:X2}”, fileStream.Length) + “\n”;
soc.Send(System.Text.Encoding.ASCII.GetBytes(cmd));
soc.Send(fileStream);
cmd = “\n”;
cmd = cmd + “\n”;
cmd = cmd + “0\n”;
cmd = cmd + “\n”;
soc.Send(System.Text.Encoding.ASCII.GetBytes(cmd));
while ((soc.Connected) && ((iRx = soc.Receive(buffer)) > 0))
{
char[] chars = new char[iRx];

System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
int charLen = d.GetChars(buffer, 0, iRx, chars, 0);
System.String szData = new System.String(chars);

retDesc = retDesc + szData;
}
soc.Close();
if (retDesc.Contains(“X-Violations-Found:”))
return 1;
else
return 0;
}
else
return -1;
}
catch (Exception e)
{
if (soc != null)
soc.Close();
retDesc = e.Message;
return -1;
}
}
}