@Override
  protected void doPost(HttpServletRequest req, HttpServletResponse resp)
      throws ServletException, IOException {
    resp.setCharacterEncoding("UTF-8");
    HttpSession user = req.getSession();
    PrintWriter out = resp.getWriter();
    SpejdResultAnalyser result = null;
    JsonObject response;

    JsonReader jsonReader =
        Json.createReader(new InputStreamReader(req.getInputStream(), StandardCharsets.ISO_8859_1));
    JsonObject jsonObject = jsonReader.readObject();
    jsonReader.close();
    System.out.println("REQUEST");
    System.out.println(jsonObject);
    String originalText = jsonObject.getString("text");
    int space = jsonObject.getInt("space");

    String xml = getXml(originalText, user.getId());
    try {
      result = new SpejdResultAnalyser(xml.replace("SYSTEM \"xcesAnaIPI.dtd\"", ""));
    } catch (ParserConfigurationException | SAXException e) {
      out.println(e.toString());
    }

    assert result != null;
    /** do analysis of xml spejd result */
    SubstantivePairs pairs = result.doAnalysis().makePair(space);

    /**
     * create json response { text: ... xml: ... pairs: [ { subst1: ... subst2: ... quantity: ... },
     * ...] }
     */
    JsonArrayBuilder arrayBuilder = Json.createArrayBuilder();
    for (SubstantivePair pair : pairs) {
      arrayBuilder.add(
          Json.createObjectBuilder()
              .add("subst1", pair.getSubst1())
              .add("subst2", pair.getSubst2())
              .add("quantity", pair.getQuantity()));
    }

    Charset.forName("UTF-8").encode(originalText);
    JsonArray array = arrayBuilder.build();
    response =
        Json.createObjectBuilder()
            .add("text", originalText)
            .add("xml", xml)
            .add("pairs", array)
            .build();
    System.out.println("RESPONSE");
    System.out.println(response);
    out.print(response);
  }
 @Override
 protected void doGet(HttpServletRequest req, HttpServletResponse resp)
     throws ServletException, IOException {
   PrintWriter out = resp.getWriter();
   out.print("działa");
 }