Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/FixingsKMChartServiceImpl.java @ 4221:480de0dbca8e

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Extended location input helper. The locationpicker has now an attribute whether the input is distance or location to display one or two clickable columns. Replaced the record click handler with cell click handler.
author Raimund Renkert <rrenkert@intevation.de>
date Tue, 23 Oct 2012 13:17:20 +0200
parents 51ed89b754ae
children
rev   line source
2488
88d44cae592e Added new proxy servlet to bridge the fixing km chart requests to the artefact server.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package de.intevation.flys.client.server;
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2
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3 import de.intevation.artifacts.common.utils.XMLUtils;
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4
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5 import de.intevation.artifacts.httpclient.http.HttpClient;
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6 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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7
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8 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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9
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10 import de.intevation.artifacts.httpclient.http.response.StreamResponseHandler;
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11
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12 import java.io.IOException;
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13 import java.io.InputStream;
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14 import java.io.OutputStream;
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15
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16 import javax.servlet.http.HttpServlet;
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17 import javax.servlet.http.HttpServletRequest;
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18 import javax.servlet.http.HttpServletResponse;
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19
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20 import org.apache.log4j.Logger;
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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 public class FixingsKMChartServiceImpl
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27 extends HttpServlet
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28 {
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29 private static final Logger log =
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30 Logger.getLogger(FixingsKMChartServiceImpl.class);
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31
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32 public static final String SERVICE_NAME = "fixings-km-chart";
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33
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34 public FixingsKMChartServiceImpl() {
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35 }
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36
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37 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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38
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39 log.info("FixingsKMChartServiceImpl.doGet");
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40
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41 String url = getServletContext().getInitParameter("server-url");
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42 String locale = req.getParameter("locale");
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43 String filter = req.getParameter("filter");
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44
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45 if (filter == null || filter.length() == 0) {
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46 log.warn("Missing 'filter' parameter.");
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47 return;
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48 }
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49
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50 if (locale == null || locale.length() == 0) {
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51 locale = "de";
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52 }
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53
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54 Document filterDoc = XMLUtils.jsonToXML(filter);
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55
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56 if (filterDoc == null) {
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57 log.warn("Creating filter document failed.");
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58 return;
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59 }
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60
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61 InputStream in;
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62
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63 try {
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64 HttpClient client = new HttpClientImpl(url, locale);
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65 in = (InputStream)client.callService(
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66 url, // XXX: Why? The URL is passed by construction already.
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67 SERVICE_NAME,
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68 filterDoc,
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69 new StreamResponseHandler());
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70 }
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71 catch (ConnectionException ce) {
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72 log.error(ce);
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73 return;
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74 }
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75
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76 resp.setHeader("Content-Type", guessMIMEType(filterDoc));
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77
2488
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78 try {
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79 OutputStream out = resp.getOutputStream();
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80
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81 byte [] buf = new byte[4096];
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82 int i = -1;
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83 while ((i = in.read(buf)) >= 0) {
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84 out.write(buf, 0, i);
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85 }
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86 out.flush();
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87 }
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88 catch (IOException ioe) {
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89 log.error(ioe);
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90 }
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91 finally {
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92 try { in.close(); }
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93 catch (IOException ioe) { /* ignored */ }
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94 }
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95 }
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96
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97 protected static String guessMIMEType(Document document) {
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98
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99 NodeList formats = document.getElementsByTagName("format");
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100
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101 String format = "png";
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102
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103 if (formats.getLength() > 0) {
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104 String type = ((Element)formats.item(0)).getAttribute("type");
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105 if (type.length() > 0) {
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106 format = type;
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107 }
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108 }
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109
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110 return "image/" + format;
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111 }
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112 }
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113 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org