Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/BedKMChartServiceImpl.java @ 8870:c26fb37899ca

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Introduced groups for modules. Modules marked with the same group-id, will be put together in the ui. Also using now the localization info from the server instead of localizing the modules again on the client side.
author gernotbelger
date Wed, 07 Feb 2018 11:59:13 +0100
parents ea9eef426962
children 0a5239a1e46e
rev   line source
5861
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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Sascha L. Teichmann <teichmann@intevation.de>
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2 * Software engineering by Intevation GmbH
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Sascha L. Teichmann <teichmann@intevation.de>
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3 *
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Sascha L. Teichmann <teichmann@intevation.de>
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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Sascha L. Teichmann <teichmann@intevation.de>
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8
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9 package org.dive4elements.river.client.server;
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10
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11 import java.io.IOException;
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12 import java.io.InputStream;
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13 import java.io.OutputStream;
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14
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15 import javax.servlet.http.HttpServlet;
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16 import javax.servlet.http.HttpServletRequest;
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17 import javax.servlet.http.HttpServletResponse;
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18
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19 import org.apache.log4j.Logger;
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20 import org.w3c.dom.Document;
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21 import org.w3c.dom.Element;
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22 import org.w3c.dom.NodeList;
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23
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24 import org.dive4elements.artifacts.common.utils.XMLUtils;
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25 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
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26 import org.dive4elements.artifacts.httpclient.http.HttpClient;
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27 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
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28 import org.dive4elements.artifacts.httpclient.http.response.StreamResponseHandler;
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29
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30 public class BedKMChartServiceImpl extends HttpServlet {
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31 private static final Logger log =
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32 Logger.getLogger(FixingsKMChartServiceImpl.class);
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33
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34 public static final String SERVICE_NAME = "bed-km-chart";
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36 public BedKMChartServiceImpl() {
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37 }
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38
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39 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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41 log.info("BedKMChartServiceImpl.doGet");
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42
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43 String url = getServletContext().getInitParameter("server-url");
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44 String locale = req.getParameter("locale");
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45 String filter = req.getParameter("filter");
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46
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47 if (filter == null || filter.length() == 0) {
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48 log.warn("Missing 'filter' parameter.");
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49 return;
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50 }
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51
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52 if (locale == null || locale.length() == 0) {
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53 locale = "de";
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54 }
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55
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56 Document filterDoc = XMLUtils.jsonToXML(filter);
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57
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58 if (filterDoc == null) {
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59 log.warn("Creating filter document failed.");
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60 return;
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61 }
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62
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63 InputStream in;
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64
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65 try {
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66 HttpClient client = new HttpClientImpl(url, locale);
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67 in = (InputStream)client.callService(
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68 url, // XXX: Why? The URL is passed by construction already.
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69 SERVICE_NAME,
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70 filterDoc,
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71 new StreamResponseHandler());
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72 }
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73 catch (ConnectionException ce) {
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74 log.error(ce);
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75 return;
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76 }
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77
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78 resp.setHeader("Content-Type", guessMIMEType(filterDoc));
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79
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80 try {
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81 OutputStream out = resp.getOutputStream();
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82
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83 byte [] buf = new byte[4096];
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84 int i = -1;
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85 while ((i = in.read(buf)) >= 0) {
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86 out.write(buf, 0, i);
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87 }
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88 out.flush();
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89 }
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90 catch (IOException ioe) {
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91 log.error(ioe);
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92 }
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93 finally {
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94 try { in.close(); }
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95 catch (IOException ioe) { /* ignored */ }
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96 }
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97 }
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98
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99 protected static String guessMIMEType(Document document) {
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100
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101 NodeList formats = document.getElementsByTagName("format");
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102
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103 String format = "png";
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104
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105 if (formats.getLength() > 0) {
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106 String type = ((Element)formats.item(0)).getAttribute("type");
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107 if (type.length() > 0) {
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108 format = type;
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109 }
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110 }
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111
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112 return "image/" + format;
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113 }
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114 }
http://dive4elements.wald.intevation.org