edu.byui.fb.BytesToImage.java Source code

Introduction

Here is the source code for edu.byui.fb.BytesToImage.java

Source

/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package edu.byui.fb;

import java.io.IOException;
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 org.apache.commons.io.IOUtils;

/**
 *
 * @author Theriault
 */
@WebServlet(name = "BytesToImage", urlPatterns = { "/BytesToImage" })
public class BytesToImage 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 {
        // Set as an image
        response.setContentType("image/jpeg");

        // Get the id of the image
        String idstr = request.getParameter("id");
        int id = Integer.parseInt(idstr);

        // Get the image given its id
        DataBaseHandler dbh = DataBaseHandler.getInstance();
        Image image = dbh.getImage(id);

        // Get the InputStream of the image and convert to bytes
        byte[] ba = IOUtils.toByteArray(image.getBytes());

        // Write bytes to screen
        response.getOutputStream().write(ba);
    }

    // <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>

}