Mercurial > dive4elements > river
annotate gwt-client/src/main/java/org/dive4elements/river/client/server/SQKMChartServiceImpl.java @ 9726:0a5239a1e46e 3.2.x
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author | Tom Gottfried <tom@intevation.de> |
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date | Wed, 02 Mar 2022 10:26:50 +0100 |
parents | ea9eef426962 |
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rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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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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8 |
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9 package org.dive4elements.river.client.server; |
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10 |
9726 | 11 import org.apache.logging.log4j.Logger; |
12 import org.apache.logging.log4j.LogManager; | |
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13 |
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14 import java.io.IOException; |
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15 import java.io.InputStream; |
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16 import java.io.OutputStream; |
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17 |
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18 import javax.servlet.http.HttpServlet; |
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19 import javax.servlet.http.HttpServletRequest; |
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20 import javax.servlet.http.HttpServletResponse; |
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21 |
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22 import org.w3c.dom.Document; |
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23 import org.w3c.dom.Element; |
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24 import org.w3c.dom.NodeList; |
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25 |
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26 import org.dive4elements.artifacts.common.utils.XMLUtils; |
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27 |
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28 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException; |
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29 import org.dive4elements.artifacts.httpclient.http.HttpClient; |
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30 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl; |
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31 |
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32 import org.dive4elements.artifacts.httpclient.http.response.StreamResponseHandler; |
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33 |
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34 public class SQKMChartServiceImpl |
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35 extends HttpServlet |
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36 { |
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37 private static final Logger log = |
9726 | 38 LogManager.getLogger(FixingsKMChartServiceImpl.class); |
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39 |
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40 public static final String SERVICE_NAME = "sq-km-chart"; |
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41 |
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42 public SQKMChartServiceImpl() { |
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43 } |
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44 |
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45 public void doGet(HttpServletRequest req, HttpServletResponse resp) { |
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46 |
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47 log.info("SQKMChartServiceImpl.doGet"); |
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48 |
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49 String url = getServletContext().getInitParameter("server-url"); |
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50 String locale = req.getParameter("locale"); |
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51 String filter = req.getParameter("filter"); |
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52 |
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53 if (filter == null || filter.length() == 0) { |
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54 log.warn("Missing 'filter' parameter."); |
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55 return; |
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56 } |
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57 |
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58 if (locale == null || locale.length() == 0) { |
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59 locale = "de"; |
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60 } |
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61 |
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62 Document filterDoc = XMLUtils.jsonToXML(filter); |
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63 |
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64 if (filterDoc == null) { |
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65 log.warn("Creating filter document failed."); |
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66 return; |
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67 } |
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68 |
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69 InputStream in; |
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70 |
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71 try { |
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72 HttpClient client = new HttpClientImpl(url, locale); |
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73 in = (InputStream)client.callService( |
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74 url, // XXX: Why? The URL is passed by construction already. |
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75 SERVICE_NAME, |
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76 filterDoc, |
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77 new StreamResponseHandler()); |
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78 } |
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79 catch (ConnectionException ce) { |
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80 log.error(ce); |
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81 return; |
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82 } |
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83 |
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84 resp.setHeader("Content-Type", guessMIMEType(filterDoc)); |
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85 |
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86 try { |
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87 OutputStream out = resp.getOutputStream(); |
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88 |
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89 byte [] buf = new byte[4096]; |
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90 int i = -1; |
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91 while ((i = in.read(buf)) >= 0) { |
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92 out.write(buf, 0, i); |
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93 } |
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94 out.flush(); |
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95 } |
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96 catch (IOException ioe) { |
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97 log.error(ioe); |
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98 } |
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99 finally { |
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100 try { in.close(); } |
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101 catch (IOException ioe) { /* ignored */ } |
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102 } |
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103 } |
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104 |
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105 protected static String guessMIMEType(Document document) { |
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106 |
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107 NodeList formats = document.getElementsByTagName("format"); |
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108 |
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109 String format = "png"; |
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110 |
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111 if (formats.getLength() > 0) { |
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112 String type = ((Element)formats.item(0)).getAttribute("type"); |
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113 if (type.length() > 0) { |
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114 format = type; |
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115 } |
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116 } |
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117 |
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118 return "image/" + format; |
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119 } |
75e9eab05ee4
Added overview chart to sq relation period input panel.
Raimund Renkert <raimund.renkert@intevation.de>
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