Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/BedKMChartServiceImpl.java @ 4740:fb135e1dfa35

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Added 'type' attribute to <dc:variable/> element. If an optional 'type' attribute is given the result of the XPATH expression is interpreted as this type. Valid values are 'number', 'bool', 'node' and 'nodeset'. All other defaults to 'string' which also is the default if nor type is given.
author Sascha L. Teichmann <teichmann@intevation.de>
date Wed, 02 Jan 2013 15:31:53 +0100
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>
parents:
diff changeset
1 package de.intevation.flys.client.server;
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
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2
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Raimund Renkert <raimund.renkert@intevation.de>
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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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Raimund Renkert <raimund.renkert@intevation.de>
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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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Raimund Renkert <raimund.renkert@intevation.de>
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11 import org.apache.log4j.Logger;
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Raimund Renkert <raimund.renkert@intevation.de>
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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;
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
Raimund Renkert <raimund.renkert@intevation.de>
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19 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
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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 BedKMChartServiceImpl 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 = "bed-km-chart";
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27
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28 public BedKMChartServiceImpl() {
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29 }
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
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30
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
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31 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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32
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33 log.info("BedKMChartServiceImpl.doGet");
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34
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35 String url = getServletContext().getInitParameter("server-url");
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
Raimund Renkert <raimund.renkert@intevation.de>
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36 String locale = req.getParameter("locale");
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Raimund Renkert <raimund.renkert@intevation.de>
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37 String filter = req.getParameter("filter");
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
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38
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39 if (filter == null || filter.length() == 0) {
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
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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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Raimund Renkert <raimund.renkert@intevation.de>
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44 if (locale == null || locale.length() == 0) {
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
Raimund Renkert <raimund.renkert@intevation.de>
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45 locale = "de";
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46 }
f84ed73311f2 Added UI for minfo bed quality calculation and added new services for overview
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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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Raimund Renkert <raimund.renkert@intevation.de>
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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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Raimund Renkert <raimund.renkert@intevation.de>
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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