/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2011 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.widget.searchandfilter.mvc;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.WritableByteChannel;
import javax.servlet.http.HttpServletResponse;
import org.geomajas.widget.searchandfilter.service.FileDownloadService;
import org.geomajas.widget.searchandfilter.service.FileDownloadService.Item;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
/**
* Controller part of Spring WebMCV.
*
* @author Kristof Heirwegh
*/
@Controller("/csvDownload")
public class CsvDownloadController {
private final Logger log = LoggerFactory.getLogger(CsvDownloadController.class);
@Autowired
private FileDownloadService service;
@RequestMapping(value = "/csvDownload", method = RequestMethod.GET)
public void handleCsvDownload(@RequestParam("id") String id, HttpServletResponse response) throws IOException {
try {
Item item = service.getFile(id);
File f = item.getFile();
if (f == null || !f.canRead()) {
response.sendError(404, "Geen document gevonden met id: " + id);
} else {
// Set response headers
response.setContentType("text/csv");
response.setContentLength((int) f.length());
String filename = (item.getDescription());
response.setHeader("Content-Disposition", "attachment; filename=" + filename);
FileInputStream fis = new FileInputStream(f);
FileChannel in = fis.getChannel();
WritableByteChannel out = Channels.newChannel(response.getOutputStream());
try {
in.transferTo(0, in.size(), out);
service.removeFile(id);
} catch (Exception e) {
throw e;
} finally {
in.close();
// make sure servlet doesn't append anything unnecessary:
out.close();
}
}
} catch (FileNotFoundException e) {
log.warn("Error retrieving file: " + e.getMessage());
response.setStatus(HttpServletResponse.SC_NOT_FOUND);
} catch (Exception e) {
log.warn("Error retrieving file: " + e.getMessage());
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
}
}