/// <summary>
/// Sends command to server
/// </summary>
/// <param name="id">command id - use this to internally track when command finished sending</param>
/// <param name="command">command</param>
/// <param name="parameters">command parameters</param>
public void SendCommand(int id, string command, params object[] parameters)
{
ServerConnectionEventArgs eventArgs = new ServerConnectionEventArgs(this, id, command, parameters);
if (stream != null && stream.CanWrite)
{
try {
byte[] buffer = PrepareCommand(command, parameters);
stream.BeginWrite(buffer, 0, buffer.Length, new AsyncCallback(CommandSentCallback), eventArgs);
} catch {
eventArgs.Result = ServerConnectionEventArgs.ResultTypes.NetworkError;
if (CommandSent != null)
{
CommandSent(this, eventArgs);
}
Close();
return;
}
}
else
{
eventArgs.Result = ServerConnectionEventArgs.ResultTypes.NetworkError;
if (CommandSent != null)
{
CommandSent(this, eventArgs);
}
}
}
private void OnCommandRecieved(object sender, ServerConnectionEventArgs args)
{
if (sender == con)
{
DispatchServerCommand(args.Command, (string[])args.Parameters);
}
}
private static void CommandSentCallback(IAsyncResult res)
{
ServerConnectionEventArgs arg = (ServerConnectionEventArgs)res.AsyncState;
arg.Result = ServerConnectionEventArgs.ResultTypes.Success;
try {
arg.ServerConnection.stream.EndWrite(res);
} catch {
arg.Result = ServerConnectionEventArgs.ResultTypes.NetworkError;
arg.ServerConnection.Close();
return;
}
if (arg.ServerConnection.CommandSent != null)
{
arg.ServerConnection.CommandSent(arg.ServerConnection, arg);
}
}
private void OnCommandRecieved(object sender, ServerConnectionEventArgs args)
{
if (sender == con) DispatchServerCommand(args.Command, (string[]) args.Parameters);
}
private static void DataRecieveCallback(IAsyncResult res)
{
ServerConnection server = (ServerConnection)res.AsyncState;
try {
server.readPosition += server.stream.EndRead(res); // actual data read - this blocks
} catch {
// there was error while reading - stream is broken
server.Close();
return;
}
// check data for new line - isolating commands from it
for (int i = server.readPosition - 1; i >= 0; --i)
{
if (server.readBuffer[i] == '\n')
{
// new line found - convert to string and parse commands
String recData = Encoding.ASCII.GetString(server.readBuffer, 0, i + 1); // convert recieved bytes to string
// cycle through lines of data
foreach (string line in recData.Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries))
{
// for each line = command do
string[] args = line.Split(' '); // split arguments
/*for (int j = 0; j < args.Length; ++j) { // replace \t with ' ' in every argument
* args[j] = args[j].Replace('\t', ' ');
* }*/
// prepare and send command recieved info
ServerConnectionEventArgs command = new ServerConnectionEventArgs();
command.ServerConnection = server;
command.RequestId = server.commandNumber++;
command.Command = args[0];
command.Result = ServerConnectionEventArgs.ResultTypes.Success;
command.Parameters = new string[args.Length - 1];
for (int j = 1; j < args.Length; ++j)
{
command.Parameters[j - 1] = args[j];
}
if (server.CommandRecieved != null)
{
server.CommandRecieved(server, command);
}
}
// copy remaining data (not ended by \n yet) to the beginning of buffer
for (int x = 0; x < server.readPosition - i - 1; ++x)
{
server.readBuffer[x] = server.readBuffer[x + i + 1];
}
server.readPosition = server.readPosition - i - 1;
break;
}
}
// prepare to read more data
int rembuf = server.readBuffer.Length - server.readPosition;
if (rembuf <= 0)
{
// read buffer too small, increase it
byte[] n = new byte[server.readBuffer.Length * 2];
server.readBuffer.CopyTo(n, 0);
server.readBuffer = n;
rembuf = server.readBuffer.Length - server.readPosition;
}
try {
server.stream.BeginRead(server.readBuffer, server.readPosition, rembuf, new AsyncCallback(DataRecieveCallback), server);
} catch {
// there was error while reading - stream is broken
server.Close();
return;
}
}
private static void DataRecieveCallback(IAsyncResult res)
{
ServerConnection server = (ServerConnection)res.AsyncState;
try {
int cnt = server.stream.EndRead(res); // actual data read - this blocks
server.readPosition += cnt;
if (cnt == 0)
{
server.Close();
return;
}
} catch {
// there was error while reading - stream is broken
server.Close();
return;
}
// check data for new line - isolating commands from it
for (int i = server.readPosition - 1; i >= 0; --i) {
if (server.readBuffer[i] == '\n') {
// new line found - convert to string and parse commands
String recData = Encoding.ASCII.GetString(server.readBuffer, 0, i + 1); // convert recieved bytes to string
// cycle through lines of data
foreach (string line in recData.Split(new char[] {'\n'}, StringSplitOptions.RemoveEmptyEntries)) {
// for each line = command do
string[] args = line.Split(' '); // split arguments
/*for (int j = 0; j < args.Length; ++j) { // replace \t with ' ' in every argument
args[j] = args[j].Replace('\t', ' ');
}*/
// prepare and send command recieved info
ServerConnectionEventArgs command = new ServerConnectionEventArgs();
command.ServerConnection = server;
command.RequestId = server.commandNumber++;
command.Command = args[0];
command.Result = ServerConnectionEventArgs.ResultTypes.Success;
command.Parameters = new string[args.Length - 1];
for (int j = 1; j < args.Length; ++j) command.Parameters[j - 1] = args[j];
if (server.CommandRecieved != null) server.CommandRecieved(server, command);
}
// copy remaining data (not ended by \n yet) to the beginning of buffer
for (int x = 0; x < server.readPosition - i - 1; ++x) server.readBuffer[x] = server.readBuffer[x + i + 1];
server.readPosition = server.readPosition - i - 1;
break;
}
}
// prepare to read more data
int rembuf = server.readBuffer.Length - server.readPosition;
if (rembuf <= 0) {
// read buffer too small, increase it
byte[] n = new byte[server.readBuffer.Length*2];
server.readBuffer.CopyTo(n, 0);
server.readBuffer = n;
rembuf = server.readBuffer.Length - server.readPosition;
}
try {
server.stream.BeginRead(server.readBuffer, server.readPosition, rembuf, new AsyncCallback(DataRecieveCallback), server);
} catch {
// there was error while reading - stream is broken
server.Close();
return;
}
}
/// <summary>
/// Sends command to server
/// </summary>
/// <param name="id">command id - use this to internally track when command finished sending</param>
/// <param name="command">command</param>
/// <param name="parameters">command parameters</param>
public void SendCommand(int id, string command, params object[] parameters)
{
ServerConnectionEventArgs eventArgs = new ServerConnectionEventArgs(this, id, command, parameters);
if (stream != null && stream.CanWrite) {
try {
byte[] buffer = PrepareCommand(command, parameters);
stream.BeginWrite(buffer, 0, buffer.Length, new AsyncCallback(CommandSentCallback), eventArgs);
} catch {
eventArgs.Result = ServerConnectionEventArgs.ResultTypes.NetworkError;
if (CommandSent != null) CommandSent(this, eventArgs);
Close();
return;
}
} else {
eventArgs.Result = ServerConnectionEventArgs.ResultTypes.NetworkError;
if (CommandSent != null) CommandSent(this, eventArgs);
}
}
