de.unirostock.sems.cbarchive.web.servlet.IconServlet.java Source code

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Here is the source code for de.unirostock.sems.cbarchive.web.servlet.IconServlet.java

Source

package de.unirostock.sems.cbarchive.web.servlet;
/*
CombineArchiveWeb - a WebInterface to read/create/write/manipulate/... COMBINE archives
Copyright (C) 2014  SEMS Group
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
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 General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;

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

import org.apache.commons.io.IOUtils;

import de.binfalse.bflog.LOGGER;
import de.unirostock.sems.cbarchive.web.Fields;
import de.unirostock.sems.cbext.Iconizer;

public class IconServlet extends HttpServlet {

    private static final long serialVersionUID = 7167498053608057183L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws UnsupportedEncodingException {
        // set charset
        response.setCharacterEncoding(Fields.CHARSET);
        request.setCharacterEncoding(Fields.CHARSET);

        // splitting request URL
        String requestUrl = request.getRequestURI();
        LOGGER.debug("IconServlet request: ", requestUrl);

        if (requestUrl != null && !requestUrl.isEmpty()) {

            String formatString = null;
            try {
                response.setContentType("image/png");

                formatString = requestUrl.substring(requestUrl.indexOf("res/icon/") + 9);
                LOGGER.debug("format: ", formatString);

                URI format = new URI(formatString);
                LOGGER.debug("format url: ", format);
                OutputStream output = response.getOutputStream();

                InputStream input = Iconizer.formatToIconStream(format);
                int size = IOUtils.copy(input, output);
                response.setContentLength(size);

                output.flush();
                output.close();
                input.close();

                response.flushBuffer();

            } catch (IOException e) {
                LOGGER.error(e, "IOException while loading icon");
            } catch (URISyntaxException e) {
                LOGGER.warn(e, "Not able to generate URL for Iconizer: ", formatString);
            }

        }

    }

}