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

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 2867a0192aed
children
rev   line source
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9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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1 package de.intevation.flys.client.server;
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2
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3 import java.io.OutputStream;
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4 import java.io.IOException;
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5 import java.util.HashMap;
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6 import java.util.Map;
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7
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8 import org.w3c.dom.Document;
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9
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10 import org.apache.log4j.Logger;
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12 import javax.servlet.http.HttpServlet;
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13 import javax.servlet.http.HttpServletRequest;
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14 import javax.servlet.http.HttpServletResponse;
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16 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
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18 import de.intevation.artifacts.httpclient.http.HttpClient;
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19 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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21
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22 /**
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23 * This service is used to request a chart from the artifact server. The
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24 * response is directed directly to the output stream, so the image that is
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25 * retrieved is displayed in the UI afterwards.
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26 *
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27 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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28 */
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29 public class ChartOutputServiceImpl
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30 extends HttpServlet
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31 {
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32 private static final Logger logger =
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33 Logger.getLogger(ChartOutputServiceImpl.class);
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34
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36 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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37 logger.info("ChartOutputServiceImpl.doGet");
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38
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39 try {
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40 OutputStream out = resp.getOutputStream();
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41
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42 String url = getServletContext().getInitParameter("server-url");
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43
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44 String uuid = req.getParameter("uuid");
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45 String type = req.getParameter("type");
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46 String locale = req.getParameter("locale");
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48 prepareHeader(req, resp);
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49
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50 Document request = ClientProtocolUtils.newOutCollectionDocument(
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51 uuid, type, type,
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52 ChartServiceHelper.getChartAttributes(prepareChartAttributes(req)));
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53
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54 HttpClient client = new HttpClientImpl(url, locale);
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55 client.collectionOut(request, uuid, "chart", out);
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56
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57 out.close();
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58 out.flush();
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59 }
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60 catch (IOException ioe) {
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61 logger.error(ioe, ioe);
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62 }
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63 catch (Exception e) {
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64 logger.error(e, e);
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65 }
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66 }
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68
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69 protected Map<String, String> prepareChartAttributes(HttpServletRequest req) {
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70 Map<String, String> attr = new HashMap<String, String>();
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71
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72 Map params = req.getParameterMap();
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73
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74 attr.put("width", req.getParameter("width"));
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75 attr.put("height", req.getParameter("height"));
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76 attr.put("minx", req.getParameter("minx"));
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77 attr.put("maxx", req.getParameter("maxx"));
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78 attr.put("miny", req.getParameter("miny"));
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79 attr.put("maxy", req.getParameter("maxy"));
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80 attr.put("format", req.getParameter("format"));
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81 attr.put("km", req.getParameter("currentKm"));
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82
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83 if (logger.isDebugEnabled()) {
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84 logger.debug("====== ZOOM VALUES =======");
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85 logger.debug(" min x: " + req.getParameter("minx"));
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86 logger.debug(" max x: " + req.getParameter("maxx"));
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87 logger.debug(" min y: " + req.getParameter("miny"));
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88 logger.debug(" max y: " + req.getParameter("maxy"));
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89 }
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90
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91 return attr;
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92 }
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93
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94
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95 protected void prepareHeader(
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96 HttpServletRequest req,
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97 HttpServletResponse resp
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98 ) {
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99 String export = req.getParameter("export");
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100
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101 if (export != null && export.equals("true")) {
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102 String format = req.getParameter("format");
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103
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104 if (format == null || format.length() == 0) {
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105 format = "png";
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106 }
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107
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108 String fn = "chart_export" + getFileExtension(format);
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109
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110 resp.setHeader("Content-Disposition", "attachment;filename=" + fn);
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111 resp.setHeader("Content-Type", getMimeType(format));
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112 }
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113 }
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114
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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115
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116 protected String getFileExtension(String format) {
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117 if (format.equals("png")) {
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118 return ".png";
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119 }
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120 else if (format.equals("pdf")) {
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121 return ".pdf";
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122 }
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123 else if (format.equals("svg")) {
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124 return ".svg";
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125 }
1587
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
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126 else if (format.equals("csv")) {
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
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127 return ".csv";
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
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128 }
1344
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129
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130 return ".png";
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parents: 549
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131 }
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
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132
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133
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134 protected String getMimeType(String format) {
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135 if (format.equals("png")) {
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136 return "image/png";
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parents: 549
diff changeset
137 }
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
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parents: 549
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138 else if (format.equals("pdf")) {
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
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139 return "application/pdf";
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
diff changeset
140 }
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
diff changeset
141 else if (format.equals("svg")) {
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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142 return "svg+xml";
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
diff changeset
143 }
1587
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
diff changeset
144 else if (format.equals("csv")) {
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
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145 return "text/plain";
45cd2364adad Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1425
diff changeset
146 }
1344
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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147
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
diff changeset
148 return "image/png";
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parents: 549
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149 }
78
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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150 }
280
b493d606fdef Enabled the client to request charts in different sizes.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 254
diff changeset
151 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

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