Mercurial > dive4elements > river
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> |
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date | Thu, 16 Aug 2012 14:42:36 +0000 |
parents | 2867a0192aed |
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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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11 |
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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 |
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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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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 |
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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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67 |
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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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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 } |
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126 else if (format.equals("csv")) { |
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127 return ".csv"; |
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128 } |
1344
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129 |
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130 return ".png"; |
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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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137 } |
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138 else if (format.equals("pdf")) { |
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139 return "application/pdf"; |
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140 } |
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141 else if (format.equals("svg")) { |
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142 return "svg+xml"; |
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143 } |
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144 else if (format.equals("csv")) { |
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145 return "text/plain"; |
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146 } |
1344
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147 |
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148 return "image/png"; |
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149 } |
78
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150 } |
280
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151 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |