Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/BedKMChartServiceImpl.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 | f84ed73311f2 |
children |
line wrap: on
line source
package de.intevation.flys.client.server; 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; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.httpclient.exceptions.ConnectionException; import de.intevation.artifacts.httpclient.http.HttpClient; import de.intevation.artifacts.httpclient.http.HttpClientImpl; import de.intevation.artifacts.httpclient.http.response.StreamResponseHandler; public class BedKMChartServiceImpl extends HttpServlet { private static final Logger log = Logger.getLogger(FixingsKMChartServiceImpl.class); public static final String SERVICE_NAME = "bed-km-chart"; public BedKMChartServiceImpl() { } public void doGet(HttpServletRequest req, HttpServletResponse resp) { log.info("BedKMChartServiceImpl.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; } }