/// <summary>
/// 解析请求的数据
/// 返回请求数据包
/// </summary>
/// <param name="buffer">所有收到的数据</param>
/// <returns></returns>
public unsafe static FrameRequest From(ReceiveBuffer buffer)
{
if (buffer.Length < 2)
{
return(null);
}
ByteBits byte0 = buffer[0];
var fin = byte0[0];
var frameCode = (FrameCodes)(byte)byte0.Take(4, 4);
if (fin == false || frameCode == FrameCodes.Continuation)
{
return(null);
}
var rsv = byte0.Take(1, 3);
ByteBits byte1 = buffer[1];
var mask = byte1[0];
if (mask == false || Enum.IsDefined(typeof(FrameCodes), frameCode) == false || rsv != 0)
{
return(null);
}
var contentLength = (int)byte1.Take(1, 7);
buffer.Position = 2;
if (contentLength == 127)
{
contentLength = (int)buffer.ReadUInt64();
}
else if (contentLength == 126)
{
contentLength = (int)buffer.ReadUInt16();
}
var packetLength = 6 + contentLength;
if (buffer.Length < packetLength)
{
return(null);
}
var maskingKey = buffer.ReadArray(4);
var content = buffer.ReadArray(contentLength);
buffer.Clear(packetLength);
if (contentLength > 0)
{
fixed(byte *pcontent = &content[0], pmask = &maskingKey[0])
{
for (var i = 0; i < contentLength; i++)
{
*(pcontent + i) = (byte)(*(pcontent + i) ^ *(pmask + i % 4));
}
}
}
return(new FrameRequest
{
Fin = fin,
Rsv = rsv,
Mask = mask,
Frame = frameCode,
ContentLength = contentLength,
MaskingKey = maskingKey,
Content = content
});
}
/// <summary>
/// 解析请求的数据
/// 返回请求数据包
/// </summary>
/// <param name="buffer">所有收到的数据</param>
/// <returns></returns>
public static unsafe FrameRequest From(ReceiveBuffer buffer)
{
if (buffer.Length < 2)
{
return null;
}
ByteBits byte0 = buffer[0];
var fin = byte0[0];
var frameCode = (FrameCodes)(byte)byte0.Take(4, 4);
if (fin == false || frameCode == FrameCodes.Continuation)
{
return null;
}
var rsv = byte0.Take(1, 3);
ByteBits byte1 = buffer[1];
var mask = byte1[0];
if (mask == false || Enum.IsDefined(typeof(FrameCodes), frameCode) == false || rsv != 0)
{
return null;
}
var contentLength = (int)byte1.Take(1, 7);
buffer.Position = 2;
if (contentLength == 127)
{
contentLength = (int)buffer.ReadUInt64();
}
else if (contentLength == 126)
{
contentLength = (int)buffer.ReadUInt16();
}
var packetLength = 6 + contentLength;
if (buffer.Length < packetLength)
{
return null;
}
var maskingKey = buffer.ReadArray(4);
var content = buffer.ReadArray(contentLength);
buffer.Clear(packetLength);
if (contentLength > 0)
{
fixed (byte* pcontent = &content[0], pmask = &maskingKey[0])
{
for (var i = 0; i < contentLength; i++)
{
*(pcontent + i) = (byte)(*(pcontent + i) ^ *(pmask + i % 4));
}
}
}
return new FrameRequest
{
Fin = fin,
Rsv = rsv,
Mask = mask,
Frame = frameCode,
ContentLength = contentLength,
MaskingKey = maskingKey,
Content = content
};
}
