view flys-client/src/main/java/de/intevation/flys/client/server/ExportServiceImpl.java @ 4488:5041105d2edd

Check if response code from GGInA is 200 OK Only parse the GGInA response if the status code is 200 OK. This improves the error message if GGInA is not available and shows the real reason instead of a JDOM error while parsing the response.
author Björn Ricks <bjoern.ricks@intevation.de>
date Wed, 14 Nov 2012 10:36:21 +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);
        }
    }
}
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