Servlet4.java Source code

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Here is the source code for Servlet4.java

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/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

import com.squareup.okhttp.FormEncodingBuilder;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.net.URL;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Roberto
 */
@WebServlet(urlPatterns = { "/Servlet4" })
public class Servlet4 extends HttpServlet {

    String r = "hola";
    public static OkHttpClient webClient = new OkHttpClient();

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet Servlet4</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet Servlet4 at " + request.getContextPath() + r + "</h1>");
            out.println("</body>");
            out.println("</html>");
            out.println(r);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        String usuario = String.valueOf(request.getSession().getAttribute("sesionusuario"));
        String empresa = String.valueOf(request.getSession().getAttribute("sesionempresa"));
        String departamento = String.valueOf(request.getSession().getAttribute("sesiondepartamento"));
        RequestBody formBody = new FormEncodingBuilder()

                .add("parametro", "hola")
                //.add("dato3","Roberto")
                .build();
        r = getString("Catalogo", formBody);

        processRequest(request, response);
    }

    public String getString(String metodo, RequestBody formBody) {

        try {
            URL url = new URL("http://192.168.43.56:5000/" + metodo);
            Request req = new Request.Builder().url(url).post(formBody).build();
            com.squareup.okhttp.Response resp = webClient.newCall(req).execute();//Aqui obtiene la respuesta en dado caso si hayas pues un return en python
            String response_string = resp.body().string();//y este seria el string de las respuesta
            return response_string;
        } catch (MalformedURLException ex) {
            //java.util.logging.Logger.getLogger(proyecto2.TestWebServer.class.getName()).log(Level.SEVERE, null, ex);
            System.out.println(ex.getMessage());
        } catch (Exception ex) {
            //java.util.logging.Logger.getLogger(proyecto2.TestWebServer.class.getName()).log(Level.SEVERE, null, ex);
            System.out.println(ex.getMessage());
        }
        return null;
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}