annotate flys-client/src/main/java/de/intevation/flys/client/server/ChartOutputServiceImpl.java @ 4128:11c589d68f13

Fix for NPE in FLYSWorkspace.bringUp() #933
author Christian Lins <christian.lins@intevation.de>
date Sun, 14 Oct 2012 10:15:50 +0200
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.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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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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15
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16 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
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17
78
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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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20
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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21
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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22 /**
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23 * This service is used to request a chart from the artifact server. The
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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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 *
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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27 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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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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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35
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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
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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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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47
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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;
78
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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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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>
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127 return ".csv";
45cd2364adad Issue 466.
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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 }
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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 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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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parents: 549
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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.
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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
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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
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148 return "image/png";
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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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