private void InternalHandleRequest(WebSocketClient client, HttpHeader header)
{
if (header.Method != HttpRequestMethod.Get)
{
client.Disconnect("Unexpected request method for websocket handshake: " + header.Method);
return;
}
if (!AuthorizeRequest(client, header))
{
client.Disconnect("Client authorization failed.");
return;
}
string upgrade = "";
string connection = "";
string webSocketKey = "";
string webSocketProtocol = null;
int webSocketVersion = 1;
header.GetParameter("Sec-WebSocket-Protocol", ref webSocketProtocol);
header.GetParameter("Sec-WebSocket-Version", ref webSocketVersion);
if (!header.GetParameter("Upgrade", ref upgrade) ||
!header.GetParameter("Connection", ref connection) ||
!header.GetParameter("Sec-WebSocket-Key", ref webSocketKey) ||
string.Compare(upgrade, "websocket", true) != 0 ||
string.Compare(connection, "upgrade", true) != 0)
{
client.SendErrorResponse(500, "Internal Error", "Invalid websocket request.");
return;
}
var responseKey = GenerateWebSocketAcceptKey(webSocketKey);
var response = new StringBuilder(256);
response.AppendFormat(
"HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept: {0}\r\n",
responseKey);
if (webSocketProtocol != null)
{
response.AppendFormat("Sec-WebSocket-Protocol: {0}\r\n", webSocketProtocol);
}
response.Append("\r\n");
client.Send(DataBuffer.FromString(response.ToString()));
client.Buffer.Reset();
client.UpgradeToWebSocket();
OnWebSocketOpen(client);
}
