/// <summary>
/// Pass the query across the network to the server side and get the responce back.
/// In case of an remote sede exception inside MessageHandler delegate
/// it will be raised localy as RemotingHandlerException
/// </summary>
/// <param name="parameters">Hold input key value pairs and gets output up on return</param>
public void Query(RemotingParams parameters)
{
foreach (KeyValuePair<string, string> kvp in parameters.Input)
{
wr.WriteLine("{0} {1}", kvp.Key.Replace('\r', ' ').Replace('\n', ' '), kvp.Value.Length);
wr.Write(kvp.Value);
wr.Flush();
string confirm = rd.ReadLine();
if (confirm != "202 OK")
throw new RemotingProtocolException("Unexpected remoting server response " + confirm);
}
wr.WriteLine("EXEC");
wr.Flush();
string response = rd.ReadLine();
string[] result = response.Split(new char[] { ' ' });
if (result.Length == 3)
{
if ((result[0] == "500") && (result[1] == "EXCEPTION"))
{
throw new RemotingHandlerException(ResponseBlock(result[2],response));
}
if ((result[0] == "200") && (result[1] == "OK"))
{
parameters.Output.Clear();
int count = 0;
try
{
count = int.Parse(result[2]);
for (int i = 0; i < count; i++)
{
response = rd.ReadLine();
int sep = response.LastIndexOf(' ');
string field = sep < 0 ? null : response.Substring(0, sep);
string value = response.Substring(sep + 1);
parameters.Output[field] = ResponseBlock(value, response);
}
return;
}
catch { }
}
}
throw new RemotingProtocolException("Unexpected remoting server response " + response);
}
/// <summary>
/// Main network dialog for each new connection
/// </summary>
/// <param name="socket"></param>
private void HandleClient(object socket)
{
RemotingParams rp = new RemotingParams();
try
{
using (Stream strm = new NetworkStream((Socket)socket, false))
{
StreamReader rd = new StreamReader(strm);
StreamWriter wr = new StreamWriter(strm);
rp.Phase = RemotingPhase.Established;
handler(rp);
wr.WriteLine("200 READY {0}",VERSION); wr.Flush();
rp.Phase = RemotingPhase.Query;
while (!rd.EndOfStream)
{
string line = rd.ReadLine();
int sep = line.LastIndexOf(' ');
if (line == string.Empty)
{
wr.WriteLine("204 BYE"); wr.Flush();
break;
}
string field = sep < 0 ? null : line.Substring(0, sep);
string value = line.Substring(sep + 1);
if (field == null) // command passed in value
{
if (value == "EXEC")
{
try
{
handler(rp);
}
catch (Exception ex)
{
string msg = ex.ToString();
wr.WriteLine("500 EXCEPTION {0}", msg.Length);
wr.Write(msg);
wr.Flush();
continue;
}
wr.WriteLine("200 OK {0}", rp.Output.Count);
foreach (KeyValuePair<string, string> kvp in rp.Output)
{
wr.WriteLine("{0} {1}",
kvp.Key.Replace('\r', ' ').Replace('\n', ' '),
kvp.Value.Length);
wr.Write(kvp.Value);
}
wr.Flush();
rp.Input.Clear();
rp.Output.Clear();
continue;
}
wr.WriteLine("404 UNKNOWN"); wr.Flush();
continue;
}
int blocklen = 0;
try
{
blocklen = int.Parse(value);
}
catch
{
wr.WriteLine("400 MAILFORMED"); wr.Flush();
continue;
}
if (blocklen > MAX_PARAM_LENGTH)
{
wr.WriteLine("406 OVERSIZE"); wr.Flush();
break;
}
char[] buf = new char[blocklen];
rd.ReadBlock(buf, 0, blocklen);
rp.Input[field] = new string(buf);
wr.WriteLine("202 OK"); wr.Flush();
}
strm.Close();
}
}
catch { }
finally
{
rp.Input.Clear();
rp.Output.Clear();
rp.Phase = RemotingPhase.Disposing;
handler(rp);
rp.Session.Clear();
}
}