--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/org/dive4elements/river/client/server/ChartOutputServiceImpl.java	Thu Apr 25 12:31:32 2013 +0200
@@ -0,0 +1,151 @@
+package de.intevation.flys.client.server;
+
+import java.io.OutputStream;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.w3c.dom.Document;
+
+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.httpclient.http.HttpClient;
+import de.intevation.artifacts.httpclient.http.HttpClientImpl;
+
+
+/**
+ * This service is used to request a chart from the artifact server. The
+ * response is directed directly to the output stream, so the image that is
+ * retrieved is displayed in the UI afterwards.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ChartOutputServiceImpl
+extends      HttpServlet
+{
+    private static final Logger logger =
+        Logger.getLogger(ChartOutputServiceImpl.class);
+
+
+    public void doGet(HttpServletRequest req, HttpServletResponse resp) {
+        logger.info("ChartOutputServiceImpl.doGet");
+
+        try {
+            OutputStream out = resp.getOutputStream();
+
+            String url = getServletContext().getInitParameter("server-url");
+
+            String uuid   = req.getParameter("uuid");
+            String type   = req.getParameter("type");
+            String locale = req.getParameter("locale");
+
+            prepareHeader(req, resp);
+
+            Document request = ClientProtocolUtils.newOutCollectionDocument(
+                uuid, type, type,
+                ChartServiceHelper.getChartAttributes(prepareChartAttributes(req)));
+
+            HttpClient client = new HttpClientImpl(url, locale);
+            client.collectionOut(request, uuid, "chart", out);
+
+            out.close();
+            out.flush();
+        }
+        catch (IOException ioe) {
+            logger.error(ioe, ioe);
+        }
+        catch (Exception e) {
+            logger.error(e, e);
+        }
+    }
+
+
+    protected Map<String, String> prepareChartAttributes(HttpServletRequest req) {
+        Map<String, String> attr = new HashMap<String, String>();
+
+        Map params = req.getParameterMap();
+
+        attr.put("width", req.getParameter("width"));
+        attr.put("height", req.getParameter("height"));
+        attr.put("minx", req.getParameter("minx"));
+        attr.put("maxx", req.getParameter("maxx"));
+        attr.put("miny", req.getParameter("miny"));
+        attr.put("maxy", req.getParameter("maxy"));
+        attr.put("format", req.getParameter("format"));
+        attr.put("km", req.getParameter("currentKm"));
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("====== ZOOM VALUES =======");
+            logger.debug("  min x: " + req.getParameter("minx"));
+            logger.debug("  max x: " + req.getParameter("maxx"));
+            logger.debug("  min y: " + req.getParameter("miny"));
+            logger.debug("  max y: " + req.getParameter("maxy"));
+        }
+
+        return attr;
+    }
+
+
+    protected void prepareHeader(
+        HttpServletRequest  req,
+        HttpServletResponse resp
+    ) {
+        String export = req.getParameter("export");
+
+        if (export != null && export.equals("true")) {
+            String format = req.getParameter("format");
+
+            if (format == null || format.length() == 0) {
+                format = "png";
+            }
+
+            String fn = "chart_export" + getFileExtension(format);
+
+            resp.setHeader("Content-Disposition", "attachment;filename=" + fn);
+            resp.setHeader("Content-Type", getMimeType(format));
+        }
+    }
+
+
+    protected String getFileExtension(String format) {
+        if (format.equals("png")) {
+            return ".png";
+        }
+        else if (format.equals("pdf")) {
+            return ".pdf";
+        }
+        else if (format.equals("svg")) {
+            return ".svg";
+        }
+        else if (format.equals("csv")) {
+            return ".csv";
+        }
+
+        return ".png";
+    }
+
+
+    protected String getMimeType(String format) {
+        if (format.equals("png")) {
+            return "image/png";
+        }
+        else if (format.equals("pdf")) {
+            return "application/pdf";
+        }
+        else if (format.equals("svg")) {
+            return "svg+xml";
+        }
+        else if (format.equals("csv")) {
+            return "text/plain";
+        }
+
+        return "image/png";
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :