--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/server/FixingsKMChartServiceImpl.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,113 @@
+package org.dive4elements.river.client.server;
+
+import org.dive4elements.artifacts.common.utils.XMLUtils;
+
+import org.dive4elements.artifacts.httpclient.http.HttpClient;
+import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
+
+import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
+
+import org.dive4elements.artifacts.httpclient.http.response.StreamResponseHandler;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
+
+public class FixingsKMChartServiceImpl
+extends      HttpServlet
+{
+    private static final Logger log =
+        Logger.getLogger(FixingsKMChartServiceImpl.class);
+
+    public static final String SERVICE_NAME = "fixings-km-chart";
+
+    public FixingsKMChartServiceImpl() {
+    }
+
+    public void doGet(HttpServletRequest req, HttpServletResponse resp) {
+
+        log.info("FixingsKMChartServiceImpl.doGet");
+
+        String url    = getServletContext().getInitParameter("server-url");
+        String locale = req.getParameter("locale");
+        String filter = req.getParameter("filter");
+
+        if (filter == null || filter.length() == 0) {
+            log.warn("Missing 'filter' parameter.");
+            return;
+        }
+
+        if (locale == null || locale.length() == 0) {
+            locale = "de";
+        }
+
+        Document filterDoc = XMLUtils.jsonToXML(filter);
+
+        if (filterDoc == null) {
+            log.warn("Creating filter document failed.");
+            return;
+        }
+
+        InputStream in;
+
+        try {
+            HttpClient client = new HttpClientImpl(url, locale);
+            in = (InputStream)client.callService(
+                url, // XXX: Why? The URL is passed by construction already.
+                SERVICE_NAME,
+                filterDoc,
+                new StreamResponseHandler());
+        }
+        catch (ConnectionException ce) {
+            log.error(ce);
+            return;
+        }
+
+        resp.setHeader("Content-Type", guessMIMEType(filterDoc));
+
+        try {
+            OutputStream out = resp.getOutputStream();
+
+            byte [] buf = new byte[4096];
+            int i = -1;
+            while ((i = in.read(buf)) >= 0) {
+                out.write(buf, 0, i);
+            }
+            out.flush();
+        }
+        catch (IOException ioe) {
+            log.error(ioe);
+        }
+        finally {
+            try { in.close(); }
+            catch (IOException ioe) { /* ignored */ }
+        }
+    }
+
+    protected static String guessMIMEType(Document document) {
+
+        NodeList formats = document.getElementsByTagName("format");
+
+        String format = "png";
+
+        if (formats.getLength() > 0) {
+            String type = ((Element)formats.item(0)).getAttribute("type");
+            if (type.length() > 0) {
+                format = type;
+            }
+        }
+
+        return "image/" + format;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :