Java tutorial
/* * 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 static Servlet3.webClient; import com.squareup.okhttp.FormEncodingBuilder; import com.squareup.okhttp.OkHttpClient; import com.squareup.okhttp.Request; import com.squareup.okhttp.RequestBody; import com.squareup.okhttp.Response; import java.io.IOException; import java.io.PrintWriter; import java.net.MalformedURLException; import java.net.URL; import java.util.HashSet; import java.util.logging.Level; import java.util.logging.Logger; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; /** * * @author Roberto */ @WebServlet(urlPatterns = { "/Servlet2" }) public class Servlet2 extends HttpServlet { public static OkHttpClient webClient = new OkHttpClient(); String r = "HOla"; /** * 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. */ if (request.getSession().getAttribute("sesionusuario") == null) { response.sendRedirect("index.jsp"); } } } protected void processRequest1(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>\n" + "<html>\n" + " \n" + " <head>\n" + " <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n" + " <title>Pgina JSP</title>\n" + " <link rel=\"stylesheet\" type=\"text/css\" href=\"style.css\">\n" + " </head>\n" + " <body>\n" + "<% HttpSession objsesion=request.getSession();\n" + "String usuario = request.getParameter(\"name\"); \n" + " objsesion.setAttribute(\"sesionusuario\",usuario); %>" + " <br>\n" + " <br>\n" + " <form action=\"Servlet2\" method=\"post\" >\n" + " <table ALIGN=\"center\">\n" + " <tr>\n" + " <td> NOMBRE:</td>\n" + " <td> <input type=\"text\" name=\"name\" /></td>\n" + " </tr>\n" + " <tr>\n" + " <td> CONTRASEA:</td>\n" + " <td> <input type=\"password\" name=\"pass\" /></td>\n" + " \n" + " </tr>\n" + " <tr>\n" + " <td> EMPRESA:</td>\n" + " <td> <input type=\"text\" name=\"empresa\" /></td>\n" + " \n" + " </tr>\n" + " <tr>\n" + " <td>DEPARTAMENTO:</td>\n" + " \n" + " <td> <input type=\"text\" name=\"departamento\" /></td>\n" + " \n" + " </tr>\n" + " \n" + " </table>\n" + " \n" + " <p align=\"center\">\n" + " <input type=\"submit\" name=\"login\" value=\"LOGIN\"/> \n" + " </p>\n" + " <p align=\"center\">\n" + " \n" + "<p>Usuario o contrasenia Invalida</p>" + " <a href=\"Servlet1\" > Registrar Usuario</a>\n" + " \n" + " </p>\n" + " </form>\n" + " </body>\n" + " \n" + "</html>"); } } // <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 = request.getParameter("name"); String pass = request.getParameter("pass"); String empresa = request.getParameter("empresa"); String departamento = request.getParameter("departamento"); RequestBody formBody = new FormEncodingBuilder() .add("usuario", usuario).add("contrasenia", pass).add("empresa", empresa) .add("departamento", departamento) //.add("dato3","Roberto") .build(); r = getString("Login", formBody); if (r.equalsIgnoreCase("true")) { //boolean sesion=true; HttpSession sesion = request.getSession(true); HttpSession sesion1 = request.getSession(true); HttpSession sesion2 = request.getSession(true); HttpSession sesion3 = request.getSession(true); sesion.setAttribute("sesionusuario", usuario); sesion1.setAttribute("sesionempresa", empresa); sesion2.setAttribute("sesiondepartamento", departamento); sesion3.setAttribute("sesionpass", pass); response.sendRedirect("menu.jsp"); //processRequest(request, response); } else { HttpSession sesion2 = request.getSession(true); sesion2.setAttribute("sesionError", "Usuario o Contrasea Invlida"); response.sendRedirect("index.jsp"); } //System.out.println(r + "---"); } 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(); 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> }