Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java @ 3497:88feb3347aa5

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Implement a ProxyServlet Implement a ProxyServlet to be able to restrict the access to the mapserver too. All queries to the provided map services should go throught this new ProxyServlet. Currently the ProxyServlet can only handle HTTP GET requests. flys-client/trunk@5221 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Bjoern Ricks <bjoern.ricks@intevation.de>
date Thu, 16 Aug 2012 14:42:36 +0000
parents bc06a671ef60
children 02cf2b1dff84
rev   line source
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1 package de.intevation.flys.client.server;
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2
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3 import org.w3c.dom.Document;
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4 import org.w3c.dom.Element;
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5
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6 import org.apache.log4j.Logger;
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7
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8 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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9
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10 import de.intevation.artifacts.common.utils.XMLUtils;
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11 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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12
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13 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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14 import de.intevation.artifacts.httpclient.http.HttpClient;
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15 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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16
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17 import de.intevation.flys.client.shared.exceptions.ServerException;
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18 import de.intevation.flys.client.shared.model.BBox;
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19 import de.intevation.flys.client.shared.model.MapInfo;
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21 import de.intevation.flys.client.client.services.MapInfoService;
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23
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24 /**
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25 * This service fetches a document that contains meta information for a specific
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26 * chart.
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27 *
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28 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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29 */
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30 public class MapInfoServiceImpl
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31 extends RemoteServiceServlet
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32 implements MapInfoService
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33 {
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34 private static final Logger logger =
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35 Logger.getLogger(MapInfoServiceImpl.class);
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36
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37
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38 public static final String XPATH_RIVER =
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39 "/mapinfo/river/@name";
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40
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41 public static final String XPATH_SRID =
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42 "/mapinfo/river/srid/@value";
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43
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44 public static final String XPATH_BBOX =
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45 "/mapinfo/river/bbox/@value";
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46
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47 public static final String XPATH_RIVER_WMS =
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48 "/mapinfo/river/river-wms/@url";
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49
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50 public static final String XPATH_WMS_URL =
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51 "/mapinfo/river/background-wms/@url";
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52
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53 public static final String XPATH_WMS_LAYERS =
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54 "/mapinfo/river/background-wms/@layers";
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55
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56 public static final String ERROR_NO_MAPINFO_FOUND =
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57 "mapinfo_service_no_result";
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58
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59
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60 public MapInfo getMapInfo(String locale, String river)
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61 throws ServerException
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62 {
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63 logger.info("MapInfoServiceImpl.getMapInfo");
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64
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65 String url = getServletContext().getInitParameter("server-url");
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66
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67 Document request = getRequestDocument(river);;
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68
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69 HttpClient client = new HttpClientImpl(url, locale);
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70
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71 try {
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72 logger.debug("MapInfoServiceImpl.callService");
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73 Document result = client.callService(url, "mapinfo", request);
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74
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75 if (result == null) {
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76 logger.warn("MapInfo service returned no result.");
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77 throw new ServerException(ERROR_NO_MAPINFO_FOUND);
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78 }
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79
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80 return getMapInfo(result);
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81 }
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82 catch (ConnectionException ce) {
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83 logger.error(ce, ce);
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84 }
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85
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86 throw new ServerException(ERROR_NO_MAPINFO_FOUND);
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87 }
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88
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89
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90 public static Document getRequestDocument(String rivername) {
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91 logger.debug("MapInfoServiceImpl.getRequestDocument");
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92
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93 Document request = XMLUtils.newDocument();
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94 ElementCreator cr = new ElementCreator(request, null, null);
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95
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96 Element root = cr.create("mapinfo");
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97 Element river = cr.create("river");
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98
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99 river.setTextContent(rivername);
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100
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101 request.appendChild(root);
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102 root.appendChild(river);
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103
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104 return request;
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105 }
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106
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107
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108 public static MapInfo getMapInfo(Document result) {
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109 logger.debug("MapInfoServiceImpl.getMapInfo");
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110
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111 String river = XMLUtils.xpathString(result, XPATH_RIVER, null);
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112 String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null);
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113 String bboxS = XMLUtils.xpathString(result, XPATH_BBOX, null);
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114 BBox bbox = BBox.getBBoxFromString(bboxS);
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115
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116 String riverWMS = XMLUtils.xpathString(result, XPATH_RIVER_WMS, null);
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117 String wmsURL = XMLUtils.xpathString(result, XPATH_WMS_URL, null);
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118 String wmsLayers = XMLUtils.xpathString(result, XPATH_WMS_LAYERS, null);
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119
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120 int srid = 4326;
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121
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122 try {
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123 srid = Integer.parseInt(sridStr);
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124 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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125 catch (NumberFormatException nfe) {
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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126 // do nothing
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parents:
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127 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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128
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129 return new MapInfo(river, srid, bbox, riverWMS, wmsURL, wmsLayers);
910b03de6857 Added a service to get some basic spatial information used for map creation.
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130 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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131 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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132 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org