org.medici.bia.controller.manuscriptviewer.ReverseProxyIIPImageThumbnailController.java Source code

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Here is the source code for org.medici.bia.controller.manuscriptviewer.ReverseProxyIIPImageThumbnailController.java

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/*
 * ReverseProxyIIPImageThumbnailController.java
 * 
 * Developed by Medici Archive Project (2010-2012).
 * 
 * This file is part of DocSources.
 * 
 * DocSources 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 2 of the License, or
 * (at your option) any later version.
 * 
 * DocSources 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * As a special exception, if you link this library with other files to
 * produce an executable, this library does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * This exception does not however invalidate any other reasons why the
 * executable file might be covered by the GNU General Public License.
 */
package org.medici.bia.controller.manuscriptviewer;

import java.io.IOException;
import java.util.Properties;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.io.IOUtils;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
 * This controller is a reverse proxy to IIPImage Server for thumbnail service. It's used to not expose 
 * IIPImage server.
 * 
 * @author Lorenzo Pasquinelli (<a href=mailto:l.pasquinelli@gmail.com>l.pasquinelli@gmail.com</a>)
 * 
 */
@Controller
@RequestMapping("/mview/ReverseProxyIIPImageThumbnail")
public class ReverseProxyIIPImageThumbnailController {
    private Logger logger = Logger.getLogger(this.getClass());
    @Autowired(required = false)
    @Qualifier("iipImageConfiguration")
    private Properties properties;

    /**
     * 
     * 
     * @param volumeId
     * @return
     */
    @RequestMapping(method = RequestMethod.GET)
    public void reverseProxyIIPImage(HttpServletRequest httpServletRequest, HttpServletResponse response) {
        // Create an instance of HttpClient.
        HttpClient client = new HttpClient();

        StringBuilder stringBuilder = new StringBuilder("");
        stringBuilder.append(properties.getProperty("iipimage.protocol"));
        stringBuilder.append("://");
        stringBuilder.append(properties.getProperty("iipimage.host"));
        stringBuilder.append(':');
        stringBuilder.append(properties.getProperty("iipimage.port"));
        stringBuilder.append(properties.getProperty("iipimage.fcgi.path"));
        stringBuilder.append('?');

        stringBuilder.append("WID=120&");
        stringBuilder.append("FIF=");
        stringBuilder.append(properties.getProperty("iipimage.image.path"));
        stringBuilder.append(httpServletRequest.getParameter("imageName"));
        stringBuilder.append("&CVT=JPEG");

        // Create a method instance.
        GetMethod method = new GetMethod(stringBuilder.toString());

        try {
            // Execute the method.
            client.executeMethod(method);
            logger.debug("Reverse Proxying IIPImageThumbnail Url : " + stringBuilder.toString() + " (Status Line"
                    + method.getStatusLine() + ")");

            // Set content type 
            response.setContentType(method.getResponseHeader("Content-Type").getValue());
            IOUtils.copy(method.getResponseBodyAsStream(), response.getOutputStream());

            // Flushing request
            response.getOutputStream().flush();
        } catch (HttpException httpException) {
            logger.error("Fatal protocol violation: " + httpException.getMessage());
        } catch (IOException e) {
            logger.error("Fatal transport error: " + e.getMessage());
        } finally {
            // Release the connection.
            method.releaseConnection();
        }
    }

    /**
     * @param properties the properties to set
     */
    public void setProperties(Properties properties) {
        this.properties = properties;
    }

    /**
     * @return the properties
     */
    public Properties getProperties() {
        return properties;
    }

}