public void SetByte(byte[] contents)
{
_content = contents;
int length = _content.Length;
if (length < 126)
{
_extend = new byte[0];
_header = new DataFrameHeader(true, false, false, false, 2, false, length);
}
else if (length < 65536)
{
_extend = new byte[2];
_header = new DataFrameHeader(true, false, false, false, 2, false, 126);
_extend[0] = (byte)(length / 256);
_extend[1] = (byte)(length % 256);
}
else
{
_extend = new byte[8];
_header = new DataFrameHeader(true, false, false, false, 2, false, 127);
int left = length;
int unit = 256;
for (int i = 7; i > 1; i--)
{
_extend[i] = (byte)(left % unit);
left = left / unit;
if (left == 0)
{
break;
}
}
}
}
public byte[] GetData(byte[] buffer, ref byte[] masks, ref int lens, ref int payload_len, ref DataFrameHeader dfh)
{
var isFinal = (buffer[0] & 128) != 0;
var reservedBits = (buffer[0] & 112);
var frameType = (FrameType)(buffer[0] & 15);
var isMasked = (buffer[1] & 128) != 0;
var length = (buffer[1] & 127);
if (!isMasked ||
!Enum.IsDefined(typeof(FrameType), frameType) ||
reservedBits != 0 || //Must be zero per spec 5.2
(frameType == FrameType.Continuation))
{
return(null);
}
lens = 0;
//帧头
_header = new DataFrameHeader(buffer);
dfh = _header;
payload_len = 0;
if (_header.OpCode != 2)
{
}
//扩展长度
if (_header.Length == 126)
{
lens = 8;
_extend = new byte[2];
Buffer.BlockCopy(buffer, 2, _extend, 0, 2);
}
else if (_header.Length == 127)
{
lens = 14;
_extend = new byte[8];
Buffer.BlockCopy(buffer, 2, _extend, 0, 8);
}
//是否有掩码
if (_header.HasMask)
{
_mask = new byte[4];
Buffer.BlockCopy(buffer, _extend.Length + 2, _mask, 0, 4);
}
//消息体
if (_extend.Length == 0)
{
_content = new byte[_header.Length];
payload_len = _content.Length;
lens = _extend.Length + _mask.Length + 2;
try
{
Buffer.BlockCopy(buffer, _extend.Length + _mask.Length + 2, _content, 0, _content.Length);
}
catch
{ }
}
else if (_extend.Length == 2)
{
int contentLength = (int)_extend[0] * 256 + (int)_extend[1];
payload_len = contentLength;
lens = _extend.Length + _mask.Length + 2;
_content = new byte[contentLength];
Buffer.BlockCopy(buffer, _extend.Length + _mask.Length + 2, _content, 0, contentLength > 1024 * 100 ? 1024 * 100 : contentLength);
}
else
{
long len = 0;
int n = 1;
for (int i = 7; i >= 0; i--)
{
len += (int)_extend[i] * n;
n *= 256;
}
payload_len = (int)len;
_content = new byte[len];
lens = _extend.Length + _mask.Length + 2;
Buffer.BlockCopy(buffer, _extend.Length + _mask.Length + 2, _content, 0, _content.Length);
}
if (_header.HasMask)
{
_content = Mask(_content, _mask);
}
return(_content);
}
