/// <summary>
/// Handles the handshake.
/// </summary>
private void HandleHandshake()
{
const int WEB_SOCKET_VERSION = 13;
const string WEB_SOCKET_KEY_HEADER = "Sec-WebSocket-Key";
const string WEB_SOCKET_VERSION_HEADER = "Sec-WebSocket-Version";
HttpMetadata = new HttpMetadata(_frameReader.Stream, _dependencyUtility);
if (!HttpMetadata.IsValid)
{
return;
}
if (string.IsNullOrEmpty(HttpMetadata.Route) || HttpMetadata.Headers.Count == 0)
{
KillConnection("Failed to read from stream");
return;
}
if (!HttpMetadata.Headers.ContainsKey(WEB_SOCKET_KEY_HEADER) ||
!HttpMetadata.Headers.ContainsKey(WEB_SOCKET_VERSION_HEADER))
{
KillConnection("Failed to retrieve websocket headers");
return;
}
int secWebSocketVersion = Convert.ToInt32(HttpMetadata.Headers[WEB_SOCKET_VERSION_HEADER]);
if (secWebSocketVersion < WEB_SOCKET_VERSION)
{
KillConnection($"WebSocket Version {secWebSocketVersion} not supported. Must be {WEB_SOCKET_VERSION} or higher");
return;
}
string secWebSocketKey = HttpMetadata.Headers[WEB_SOCKET_KEY_HEADER];
string secWebSocketAccept = ComputeSocketAcceptString(secWebSocketKey);
string response = ComputeResponseString(secWebSocketAccept);
byte[] responseBytes = Encoding.UTF8.GetBytes(response);
_frameReader.Stream.Write(responseBytes, 0, responseBytes.Length);
IsValid = true;
IWebSocketDataHandler handler = _routeTable[HttpMetadata.Route];
handler?.OnOpen(this, new ConnectionOpenedEventArgs(HttpMetadata.QueryStrings));
}
/// <summary>
/// Adds one HTTP header and its value.
/// </summary>
/// <param name="key">header name</param>
/// <param name="value">header value</param>
public void AddHeader(string key, object value)
{
//_metadata.Add(key, value);
HttpMetadata.Add(key, value);
}