com.redoute.datamap.servlet.picture.FindPicture.java Source code

Introduction

Here is the source code for com.redoute.datamap.servlet.picture.FindPicture.java

Source

/*
 * 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.
 */

package com.redoute.datamap.servlet.picture;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;
import org.apache.log4j.Logger;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.owasp.html.PolicyFactory;
import org.owasp.html.Sanitizers;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.redoute.datamap.entity.Picture;
import com.redoute.datamap.service.IPictureService;
import com.redoute.datamap.util.HTML5CanvasURLUtil;
import com.redoute.datamap.util.HTML5CanvasURLUtil.HTML5CanvasURLParsingException;
import com.redoute.datamap.util.IndividualSearchUtil;
import com.redoute.datamap.util.StringUtil;

/**
 *
 * @author bcivel
 */
public class FindPicture extends HttpServlet {

    private static final long serialVersionUID = 1L;

    private static final Logger LOG = Logger.getLogger(FindPicture.class);

    public static enum ParameterKey {
        id, Application, Page, Picture;
    }

    public static final String JSON_PICTURE_KEY = "picture";

    private HttpServletResponse response;

    private IPictureService pictureService;

    @Override
    public void init() throws ServletException {
        ApplicationContext appContext = WebApplicationContextUtils
                .getWebApplicationContext(this.getServletContext());
        pictureService = appContext.getBean(IPictureService.class);
    }

    /**
     * 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 {
        this.response = response;

        PolicyFactory policy = Sanitizers.FORMATTING.and(Sanitizers.LINKS);

        // Case of calling servlet only with the ParameterKey#id
        String id = policy.sanitize(request.getParameter(ParameterKey.id.name()));
        if (!StringUtil.isEmpty(id)) {
            processId(id);
        }

        // Case of calling servlet with ParameterKey#Application,
        // ParameterKey#Page and ParameterKey#Picture
        String application = policy.sanitize(request.getParameter(ParameterKey.Application.name()));
        String page = policy.sanitize(request.getParameter(ParameterKey.Page.name()));
        String picture = policy.sanitize(request.getParameter(ParameterKey.Picture.name()));
        if (!(StringUtil.isEmpty(application) && StringUtil.isEmpty(page) && StringUtil.isEmpty(picture))) {
            processApplicationPagePicture(application, page, picture);
        }
    }

    private void processId(String id) throws IOException {
        Picture picture = pictureService.findPictureByKey(id);
        if (picture == null) {
            return;
        }

        try {
            JSONObject jsonResponse = new JSONObject();
            JSONArray row = new JSONArray();
            row.put(picture.getId()).put(picture.getPage()).put(picture.getPicture()).put(picture.getBase64());
            jsonResponse.put(JSON_PICTURE_KEY, row);
            response.setContentType("application/json");
            response.getWriter().print(jsonResponse.toString());
        } catch (JSONException e) {
            LOG.error("Unable to create JSON object", e);
        }
    }

    private void processApplicationPagePicture(final String application, final String page, final String picture)
            throws IOException {
        @SuppressWarnings("serial")
        String individualSearch = IndividualSearchUtil.constructIndividualSearch(new HashMap<String, String>() {
            {
                put(ParameterKey.Application.name(), application);
                put(ParameterKey.Page.name(), page);
                put(ParameterKey.Picture.name(), picture);
            }
        });
        List<Picture> pictures = pictureService.findPictureListByCriteria(individualSearch, "");
        if (pictures == null || pictures.isEmpty()) {
            return;
        }

        // In case of multiple pictures, takes the first one by default
        Picture pic = pictures.get(0);
        try {
            response.setContentType(String.format("image/%s", HTML5CanvasURLUtil.parseImageType(pic.getBase64())));
            IOUtils.write(HTML5CanvasURLUtil.decodeBase64Data(HTML5CanvasURLUtil.parseBase64Data(pic.getBase64())),
                    response.getOutputStream());
        } catch (HTML5CanvasURLParsingException e) {
            throw new IOException(e);
        }
    }

    // <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>

}