IdHTTPServerはwebsocketサービス側の作成を完了

procedure TfWebSocket.IdHTTPServer1CommandGet(AContext: TIdContext; ARequestInfo: TIdHTTPRequestInfo; AResponseInfo: TIdHTTPResponseInfo);
var
  svk,sValue:string;
  FHash: TIdHashSHA1;
  strmRequest: TMemoryStream;
begin

    FHash := TIdHashSHA1.Create;
    strmRequest  := TMemoryStream.Create;
    strmRequest.Position := 0;
    svk:=ARequestInfo.RawHeaders.Values['Sec-WebSocket-Key'];
    Memo1.Lines.Add('Get:'+svk);
      AResponseInfo.ResponseNo         := 101;
      AResponseInfo.ResponseText       := 'Switching Protocols';
      AResponseInfo.CloseConnection    := False;
      //Connection: Upgrade
      AResponseInfo.Connection         := 'Upgrade';
      //Upgrade: websocket
      AResponseInfo.CustomHeaders.Values['Upgrade'] := 'websocket';

      //Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=
      sValue := svk +                     //... "minus any leading and trailing whitespace"
                '258EAFA5-E914-47DA-95CA-C5AB0DC85B11';          //special GUID
      sValue := TIdEncoderMIME.EncodeBytes(                      //Base64
                           FHash.HashString(sValue) );           //SHA1
      //sValue := string(FHash.CalcString(AnsiString(sValue)));  //SHA1 + Base64
      AResponseInfo.CustomHeaders.Values['Sec-WebSocket-Accept'] := sValue;

      //send same protocol back?
     AResponseInfo.WriteHeader;
end;