private bool HandleUpgradeResponse()
{
Func <string> acceptkey = () =>
{
using (SHA1 sha1 = SHA1.Create())
{
StringBuilder ss = new StringBuilder();
string key = _secWebSocketKey + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
byte[] hash = sha1.ComputeHash(Encoding.UTF8.GetBytes(key));
return(Convert.ToBase64String(hash));
}
};
StringBuilder headers = new StringBuilder();
headers.Append("HTTP/1.1 101 Switching Protocols\r\n");
headers.Append("Upgrade: websocket\r\n");
headers.Append("Connection: Upgrade\r\n");
headers.AppendFormat("Sec-WebSocket-Accept: {0}\r\n", acceptkey());
headers.AppendFormat("Sec-WebSocket-Origin: {0}\r\n", _origin);
headers.AppendFormat("Sec-WebSocket-Location: ws://{0}{1}\r\n\r\n", _host, _rawUri);
byte[] response = Encoding.UTF8.GetBytes(headers.ToString());
lock (_signal)
{
if (!_socket.Connected || SocketExtension.CleanedUp(_socket))
{
return(false);
}
return(SocketExtension.BeginSend(_socket, response, 0, response.Length, null));
}
}
public bool Send(OpCode opcode, byte[] buffer)
{
if (buffer == null)
{
return(false);
}
lock (this)
{
if (!socket.Connected)
{
return(false);
}
WebSocketFrame frame = new WebSocketFrame();
frame.opcode = (byte)opcode;
frame.fin = true;
frame.rsv1 = false;
frame.rsv2 = false;
frame.rsv3 = false;
frame.masked = clientMode; // 客户端需要加密；服务器禁止加密（chrome）
frame.payload_data = buffer;
frame.payload_length = buffer.Length;
using (MemoryStream s = WebSocketFrame.Pack(frame))
{
return(SocketExtension.BeginSend(socket, s.GetBuffer(), 0, (int)s.Position, null));
}
}
}
private bool SendUpgradeRequest()
{
lock (_signal)
{
if (!_socket.Connected || SocketExtension.CleanedUp(_socket))
{
return(false);
}
}
StringBuilder sb = new StringBuilder();
sb.AppendFormat("GET {0} HTTP/1.1\r\n", _uri.AbsolutePath);
sb.AppendFormat("Host: {0}:{1}\r\n", _uri.Host, _uri.Port);
sb.Append("Connection: Upgrade\r\n");
sb.Append("Pragma: no-cache\r\n");
sb.Append("Cache-Control: no-cache\r\n");
sb.Append("Upgrade: websocket\r\n");
sb.Append("Origin: null\r\n");
sb.Append("Accept-Encoding: gzip, deflate, br\r\n");
sb.Append("Accept-Language: zh-CN,zh;q=0.9\r\n");
sb.Append("User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36\r\n");
sb.AppendFormat("Sec-WebSocket-Key: {0}\r\n", _secWebSocketKey);
sb.Append("Sec-WebSocket-Origin: null\r\n");
sb.Append("Sec-WebSocket-Version: 13\r\n");
sb.Append("Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits\r\n\r\n");
byte[] request = Encoding.UTF8.GetBytes(sb.ToString());
if (!SocketExtension.BeginSend(_socket, request, 0, request.Length, null))
{
return(false);
}
return(true);
}