/// <summary>
/// Deserializes the data into control frame.
/// </summary>
/// <param name="data">The data.</param>
/// <returns>Deserialized frame.</returns>
private BaseFrame DeserializeControlFrame(byte[] data)
{
var frame = new ControlFrame();
ParseControlFrameHeader(ref frame, data);
switch (frame.Type)
{
case FrameType.RTS:
frame.StatusCode = (StatusCode)BinaryHelper.Int32FromBytes(new ArraySegment <byte>(data, 8, 4));
break;
case FrameType.Headers:
case FrameType.SynReply:
ParseControlFrameHeaders(ref frame, data, 12);
break;
case FrameType.SynStream:
frame.Priority = (byte)(data[9] >> 5);
ParseControlFrameHeaders(ref frame, data, 12);
break;
case FrameType.CreditUpdate:
((CreditUpdateFrame)frame).CreditAddition = BinaryHelper.Int32FromBytes(new ArraySegment <byte>(data, 8, 4));
break;
}
return(frame);
}
/// <summary>
/// Parses HTTP headers of SM control frame.
/// </summary>
/// <param name="frame">The frame.</param>
/// <param name="data">The data.</param>
/// <param name="offset">Offset of HTTP headers in the data.</param>
private void ParseControlFrameHeaders(ref ControlFrame frame, byte[] data, int offset)
{
var headers = new byte[data.Length - offset];
Array.Copy(data, offset, headers, 0, headers.Length);
if (headers.Length > 0)
{
ProcessorRun(ref data, DirectionProcessType.Outbound, frame.Flags);
}
for (int i = 0; /*i < headersCount*/ offset < data.Length; ++i)
{
int nameLength = BinaryHelper.Int32FromBytes(new ArraySegment <byte>(data, offset, 4));
offset += 4;
string name = Encoding.UTF8.GetString(data, offset, nameLength);
offset += nameLength;
int valLength = BinaryHelper.Int32FromBytes(new ArraySegment <byte>(data, offset, 4));
offset += 4;
string val = Encoding.UTF8.GetString(data, offset, valLength);
offset += valLength;
// Ensure no duplicates.
if (frame.Headers.ContainsKey(name))
{
throw new SMProtocolExeption(StatusCode.InternalError);
}
frame.Headers.Add(name, val);
}
}
/// <summary>
/// Deserializes the WebSocket Close Extension Data.
/// </summary>
/// <param name="data">The data.</param>
/// <returns>Deserialized Extension Data.</returns>
public CloseFrameExt DeserializeCloseFrameExt(byte[] data)
{
var extData = new CloseFrameExt();
extData.StatusCode = BinaryHelper.Int16FromBytes(data[0], data[1], 0);
extData.LastGoodSessionId = BinaryHelper.Int32FromBytes(new ArraySegment <byte>(data, 2, 4));
return(extData);
}
/// <summary>
/// Parses HTTP header of SM control frame.
/// </summary>
/// <param name="frame">The frame.</param>
/// <param name="data">The data.</param>
private static void ParseControlFrameHeader(ref ControlFrame frame, byte[] data)
{
frame.Version = BinaryHelper.Int16FromBytes(data[0], data[1], 1);
frame.Type = (FrameType)BinaryHelper.Int16FromBytes(data[2], data[3]);
frame.StreamId = BinaryHelper.Int32FromBytes(new ArraySegment <byte>(data, 4, 4), 0);
frame.Flags = data[8];
// frame.Length = BinaryHelper.Int32FromBytes(new ArraySegment<byte>(data, 5, 3));
frame.IsFinal = (frame.Flags & 0x01) != 0;
}
/// <summary>
/// Parses HTTP header of SM data frame.
/// </summary>
/// <param name="frame">The frame.</param>
/// <param name="data">The data.</param>
private static void ParseDataFrameHeader(ref DataFrame frame, byte[] data)
{
frame.StreamId = BinaryHelper.Int32FromBytes(new ArraySegment <byte>(data, 0, 4), 0);
frame.Flags = data[4];
frame.IsFinal = (frame.Flags & 0x01) != 0;
}