servlets.post.java Source code

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Here is the source code for servlets.post.java

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/*
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package servlets;

import com.google.gson.JsonObject;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
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;
import javax.servlet.http.Part;
import org.apache.commons.io.FilenameUtils;

/**
 *
 * @author Daniel Castillo
 */
@WebServlet(name = "post", urlPatterns = { "/post" })
@MultipartConfig
public class post extends HttpServlet {

    /**
     * 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");
        PrintWriter out = response.getWriter();
        JsonObject resp = new JsonObject();
        try {
            String tipo = request.getParameter("tipo") == null ? "" : request.getParameter("tipo");
            String titulo = request.getParameter("titulo") == null ? "" : request.getParameter("titulo");
            String descripcion = request.getParameter("descripcion") == null ? ""
                    : request.getParameter("descripcion");
            int categoria = request.getParameter("categoria") == null ? -1
                    : Integer.parseInt(request.getParameter("categoria"));

            //Si los campos estan vacios: error de validacion
            if (tipo.equals("") || titulo.equals("") || descripcion.equals("") || categoria == -1) {
                throw new Exception("W::No puedes dejar campos vacios. Intentalo nuevamente");
            }

            Part imagen = request.getPart("contenido");
            Part audio = request.getPart("audio");
            String cabeceraI = "";
            String cabeceraA = "";

            boolean siimagen = false;
            if (imagen != null && !imagen.getContentType().equals("application/octet-stream")) {
                cabeceraI = request.getParameter("cabeceraI") == null ? "" : request.getParameter("cabeceraI");
                if (cabeceraI.equals(""))
                    throw new Exception("W::tu imagen no tiene cabecera. Agregale una antes de enviar los datos");
                else
                    siimagen = true;
            }
            boolean siaudio = false;
            if (audio != null && !audio.getContentType().equals("application/octet-stream")) {
                cabeceraA = request.getParameter("cabeceraA") == null ? "" : request.getParameter("cabeceraA");
                if (cabeceraA.equals(""))
                    throw new Exception("W::tu archivo no tiene cabecera. Agregale uno antes de enviar los datos");
                else
                    siaudio = true;
            }

            HttpSession ss = request.getSession();
            int db = ss.getAttribute("bd") == null ? -1 : Integer.parseInt(ss.getAttribute("bd").toString());
            int id = ss.getAttribute("id") == null ? -1 : Integer.parseInt(ss.getAttribute("id").toString());
            if (db == -1 || id == -1)
                throw new Exception("Problemas con la base de datos. Por favor, intentalo mas tarde");

            ldn.cPost post = new ldn.cPost(db);
            String msg = post.nuevoPost(id, categoria, titulo, descripcion);
            if (post.getIdP() == -1)
                throw new Exception(msg);
            //msg se manda como error si idP = -1

            String result = "";
            if (siimagen) {
                String extension = FilenameUtils.getExtension(imagen.getSubmittedFileName());
                result = Clases.Utilities.saveFile(imagen, "imagenPost", "imagen", "." + extension);
                if (result.startsWith("/"))
                    result = post.registraContenidoP(Integer.toString(post.getIdP()), result, cabeceraI);
                else
                    throw new Exception(result);
                msg += "\n" + result;
            }
            if (siaudio) {
                String extension = FilenameUtils.getExtension(audio.getSubmittedFileName());
                System.out.println(extension);
                result = Clases.Utilities.saveFile(audio, "audioPost", "audio", "." + extension);
                if (result.startsWith("/"))
                    result = post.registraContenidoP(Integer.toString(post.getIdP()), result, cabeceraA);
                else
                    throw new Exception(result);
                msg += "\n" + result;
            }
            resp.addProperty("status", "OK");
            resp.addProperty("msg", msg);
        } catch (Exception e) {
            if (e.getMessage().startsWith("W::")) {
                resp.addProperty("status", "WARNING");
                resp.addProperty("msg", e.getMessage().substring(3));
            } else {
                resp.addProperty("status", "ERROR");
                resp.addProperty("msg", e.getMessage());
            }
        }
        out.print(resp.toString());
    }

    // <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 {
        processRequest(request, response);
    }

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

}