public void SendWebSocketText(string text)
{
var data = Encoding.GetEncoding(1252).GetBytes(text);
var buffer = new DataBuffer();
buffer.Write((byte)0x81); // text frame and FIN
if (data.Length <= 125)
{
buffer.Write((byte)data.Length);
}
else if (data.Length <= ushort.MaxValue)
{
// needs the masking shit??
buffer.Write((byte)126);
buffer.Write((short)WebSocketHeader.ReverseBytes((ushort)data.Length));
}
else
{
buffer.Write((byte)127);
buffer.Write((long)WebSocketHeader.ReverseBytes((ulong)data.Length));
}
buffer.Write(data, 0, data.Length);
Send(buffer);
}
public const long MaxPayloadSize = 8388608; // 8 MB
private void ProcessWebSocketData(WebSocketClient client, byte[] buffer, int offset, int length)
{
if (client.Buffer.Length + length > MaxWebSocketDataLength)
{
client.Disconnect("WebSocket buffer overflow");
return;
}
client.Buffer.Offset = client.Buffer.Length;
client.Buffer.Write(buffer, offset, length);
var header = new WebSocketHeader();
while (client.Buffer.Length > 0)
{
client.Buffer.Offset = 0;
var result = header.Read(client.Buffer);
if (result != WebSocketHeaderReadResult.Succeeded)
{
if (result != WebSocketHeaderReadResult.NeedMoreData)
{
client.Disconnect("WebSocket protocol error");
}
break;
}
/*if (header.OpCode != WebSocketOpCode.Text &&
* header.OpCode )
* {
* Logger.Log(LogType.Warning, "Unsupported WebSocket OpCode: {0}", header.OpCode);
* webClient.Disconnect();
* break;
* }*/
if (header.PayloadSize > MaxPayloadSize)
{
client.Disconnect("Too big websocket packet received. Payload size: " + header.PayloadSize);
break;
}
if (!header.Masked)
{
client.Disconnect("WebSocket clients must send masked data.");
break;
}
if (!header.Finished)
{
client.Disconnect("Continuation frames not supported.");
break;
}
// parse
if (client.Buffer.Offset + header.PayloadSize <= client.Buffer.Length) // check if we received all data
{
if (header.Masked)
{
DecodeWebSocketData(
header.Mask,
client.Buffer.InternalBuffer,
client.Buffer.Offset,
(int)header.PayloadSize);
}
if (header.PayloadSize > 0 &&
header.OpCode == WebSocketOpCode.Text)
{
var str_data = Encoding.GetEncoding(1252).GetString(
client.Buffer.InternalBuffer,
client.Buffer.Offset,
(int)header.PayloadSize);
OnWebSocketData(
client,
str_data);
}
if (client.IsDisconnect)
{
break;
}
// delete from buffer
client.Buffer.Remove(header.HeaderSize + (int)header.PayloadSize);
}
else
{
return; // need more data
}
}
}
