org.silverpeas.web.directory.servlets.ImageDisplay.java Source code

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Here is the source code for org.silverpeas.web.directory.servlets.ImageDisplay.java

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/*
 * Copyright (C) 2000 - 2018 Silverpeas
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * As a special exception to the terms and conditions of version 3.0 of
 * the GPL, you may redistribute this Program in connection with Free/Libre
 * Open Source Software ("FLOSS") applications as described in Silverpeas's
 * FLOSS exception.  You should have received a copy of the text describing
 * the FLOSS exception, and it is also available here:
 * "https://www.silverpeas.org/legal/floss_exception.html"
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.silverpeas.web.directory.servlets;

import org.apache.commons.io.IOUtils;
import org.silverpeas.core.util.logging.SilverLogger;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class ImageDisplay extends HttpServlet {

    private static final long serialVersionUID = -5179071528136683667L;

    @Override
    public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException {
        SilverLogger logger = SilverLogger.getLogger(this);
        String avatarPath = getAvatar(req);
        ImageProfil profile = new ImageProfil(avatarPath);
        if (!profile.exist()) {
            logger.warn("The image {0} doesn't exist", avatarPath);
            res.sendError(HttpServletResponse.SC_NOT_FOUND);
        } else {
            res.setContentType(profile.getMimeType());
            res.setHeader("Cache-Control", "no-store"); //HTTP 1.1
            res.setHeader("Pragma", "no-cache");
            res.setDateHeader("Expires", -1);
            try (InputStream in = profile.getImage(); OutputStream out = res.getOutputStream()) {
                IOUtils.copy(in, out);
            } catch (IOException e) {
                logger.error("Error while getting image {0}", avatarPath);
                throw e;
            }
        }
    }

    protected String getAvatar(HttpServletRequest req) {
        int position = req.getPathInfo().indexOf('/');
        return req.getPathInfo().substring(position + 1);
    }
}