Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/ExportServiceImpl.java @ 4421:0b0f415203f0
Add new Filter class to change caching
Add new Filter class to avoid caching of GWT nocache files in browsers and http
proxies. The new Filter class NoCacheFilter sets http headers to stop the
proxies and browesers from storing the nocache files.
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Tue, 06 Nov 2012 13:32:06 +0100 |
parents | def13f23bb27 |
children | 94b95e002fb9 |
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package de.intevation.flys.client.server; import java.io.OutputStream; import java.io.IOException; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.apache.log4j.Logger; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import de.intevation.artifacts.common.utils.ClientProtocolUtils; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.httpclient.http.HttpClient; import de.intevation.artifacts.httpclient.http.HttpClientImpl; /** * This service is used to request a data export from the artifact server. The * response is directed directly to the output stream, so that a file dialog is * opened. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class ExportServiceImpl extends HttpServlet { private static final Logger logger = Logger.getLogger(ExportServiceImpl.class); public void doGet(HttpServletRequest req, HttpServletResponse resp) { logger.info("ExportServiceImpl.doGet"); try { OutputStream out = resp.getOutputStream(); String url = getServletContext().getInitParameter("server-url"); String uuid = req.getParameter("uuid"); String mode = req.getParameter("mode"); String type = req.getParameter("type"); String locale = req.getParameter("locale"); String km = req.getParameter("km"); String fn = mode + "." + type; resp.setHeader("Content-Disposition", "attachment;filename=" + fn); if (logger.isDebugEnabled()) { logger.debug("Request " + type + " export."); } Document attr = null; if (km != null && km.length() > 0) { attr = XMLUtils.newDocument(); XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(attr, null, null); Element e = ec.create("km"); e.setTextContent(km); attr.appendChild(e); } Document request = ClientProtocolUtils.newOutCollectionDocument( uuid, mode, type, attr); HttpClient client = new HttpClientImpl(url, locale); client.collectionOut(request, uuid, mode, out); out.close(); out.flush(); } catch (IOException ioe) { logger.error(ioe, ioe); } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :