--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/server/ExportServiceImpl.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,79 @@
+package org.dive4elements.river.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 org.dive4elements.artifacts.common.utils.ClientProtocolUtils;
+import org.dive4elements.artifacts.common.utils.XMLUtils;
+
+import org.dive4elements.artifacts.httpclient.http.HttpClient;
+import org.dive4elements.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 name   = req.getParameter("name");
+            String mode   = req.getParameter("mode");
+            String type   = req.getParameter("type");
+            String locale = req.getParameter("locale");
+            String km     = req.getParameter("km");
+            String fn     = name + "." + 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 :