Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/BedloadKMChartServiceImpl.java @ 4253:a1bc5b8cff0f

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Refactor GaugePanel to create it's own SectionStackSection The GaugePanel constructor now creates a SectionStackSection instead of using a provided one. Improve the rendering of the GaugePanel by having access to the SmartGWT wrapper (WidgetCanvas) object for the GWT Tree (GaugeTree) directly. Add methods to close and open the section. Also add a getter for the section.
author Björn Ricks <bjoern.ricks@intevation.de>
date Thu, 25 Oct 2012 13:52:58 +0200
parents f84ed73311f2
children
rev   line source
3705
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
Raimund Renkert <raimund.renkert@intevation.de>
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1 package de.intevation.flys.client.server;
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2
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3 import java.io.IOException;
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4 import java.io.InputStream;
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5 import java.io.OutputStream;
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6
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7 import javax.servlet.http.HttpServlet;
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8 import javax.servlet.http.HttpServletRequest;
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9 import javax.servlet.http.HttpServletResponse;
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10
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11 import org.apache.log4j.Logger;
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12 import org.w3c.dom.Document;
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13 import org.w3c.dom.Element;
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14 import org.w3c.dom.NodeList;
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15
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16 import de.intevation.artifacts.common.utils.XMLUtils;
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17 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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18 import de.intevation.artifacts.httpclient.http.HttpClient;
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19 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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20 import de.intevation.artifacts.httpclient.http.response.StreamResponseHandler;
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21
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22 public class BedloadKMChartServiceImpl extends HttpServlet {
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23 private static final Logger log =
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24 Logger.getLogger(FixingsKMChartServiceImpl.class);
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25
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26 public static final String SERVICE_NAME = "bedload-km-chart";
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27
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28 public BedloadKMChartServiceImpl() {
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29 }
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30
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31 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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32
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33 log.info("BedloadKMChartServiceImpl.doGet");
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34
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35 String url = getServletContext().getInitParameter("server-url");
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36 String locale = req.getParameter("locale");
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37 String filter = req.getParameter("filter");
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38
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39 if (filter == null || filter.length() == 0) {
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40 log.warn("Missing 'filter' parameter.");
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41 return;
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42 }
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43
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44 if (locale == null || locale.length() == 0) {
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45 locale = "de";
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46 }
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47
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48 Document filterDoc = XMLUtils.jsonToXML(filter);
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49
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50 if (filterDoc == null) {
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51 log.warn("Creating filter document failed.");
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52 return;
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53 }
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54
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55 InputStream in;
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56
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57 try {
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58 HttpClient client = new HttpClientImpl(url, locale);
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59 in = (InputStream)client.callService(
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60 url, // XXX: Why? The URL is passed by construction already.
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61 SERVICE_NAME,
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62 filterDoc,
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63 new StreamResponseHandler());
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64 }
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65 catch (ConnectionException ce) {
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66 log.error(ce);
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67 return;
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68 }
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69
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70 resp.setHeader("Content-Type", guessMIMEType(filterDoc));
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71
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72 try {
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73 OutputStream out = resp.getOutputStream();
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74
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75 byte [] buf = new byte[4096];
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76 int i = -1;
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77 while ((i = in.read(buf)) >= 0) {
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78 out.write(buf, 0, i);
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79 }
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80 out.flush();
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81 }
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82 catch (IOException ioe) {
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83 log.error(ioe);
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84 }
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85 finally {
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86 try { in.close(); }
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87 catch (IOException ioe) { /* ignored */ }
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88 }
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89 }
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90
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91 protected static String guessMIMEType(Document document) {
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92
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93 NodeList formats = document.getElementsByTagName("format");
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94
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95 String format = "png";
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96
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97 if (formats.getLength() > 0) {
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98 String type = ((Element)formats.item(0)).getAttribute("type");
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99 if (type.length() > 0) {
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100 format = type;
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101 }
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102 }
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103
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104 return "image/" + format;
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105 }
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106 }
http://dive4elements.wald.intevation.org