svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.compat / org.gvsig.compat.se / src / main / java / org / gvsig / compat / se / net / SEDownloader.java @ 40435
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1 | 40435 | jjdelcerro | package org.gvsig.compat.se.net; |
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2 | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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3 | *
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4 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 2
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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19 | *
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20 | * For more information, contact:
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21 | *
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22 | * Generalitat Valenciana
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23 | * Conselleria d'Infraestructures i Transport
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24 | * Av. Blasco Ib??ez, 50
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25 | * 46010 VALENCIA
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26 | * SPAIN
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27 | *
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28 | * +34 963862235
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29 | * gvsig@gva.es
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30 | * www.gvsig.gva.es
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31 | *
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32 | * or
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33 | *
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34 | * IVER T.I. S.A
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35 | * Salamanca 50
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36 | * 46005 Valencia
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37 | * Spain
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38 | *
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39 | * +34 963163400
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40 | * dac@iver.es
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41 | */
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42 | |||
43 | import java.io.BufferedOutputStream; |
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44 | import java.io.DataInputStream; |
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45 | import java.io.DataOutputStream; |
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46 | import java.io.File; |
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47 | import java.io.FileNotFoundException; |
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48 | import java.io.FileOutputStream; |
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49 | import java.io.IOException; |
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50 | import java.io.OutputStreamWriter; |
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51 | import java.net.ConnectException; |
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52 | import java.net.HttpURLConnection; |
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53 | import java.net.URI; |
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54 | import java.net.URL; |
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55 | import java.net.UnknownHostException; |
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56 | import java.security.KeyManagementException; |
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57 | import java.security.NoSuchAlgorithmException; |
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58 | import java.util.Hashtable; |
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59 | import java.util.prefs.Preferences; |
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60 | |||
61 | import javax.net.ssl.HttpsURLConnection; |
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62 | import javax.net.ssl.SSLContext; |
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63 | import javax.net.ssl.TrustManager; |
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64 | import javax.net.ssl.X509TrustManager; |
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65 | |||
66 | import org.slf4j.Logger; |
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67 | import org.slf4j.LoggerFactory; |
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68 | |||
69 | import org.gvsig.compat.net.ICancellable; |
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70 | |||
71 | |||
72 | /**
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73 | * Clase con m?todos de utilidad en el protocolo WMS
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74 | *
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75 | * @authors Laura D?az, jaume dominguez faus
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76 | */
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77 | public class SEDownloader implements org.gvsig.compat.net.Downloader{ |
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78 | String characters;
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79 | boolean canceled;
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80 | final long latency = 500; |
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81 | private static int count = 0; |
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82 | private static Logger LOG = LoggerFactory.getLogger(SEDownloader.class); |
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83 | |||
84 | /**
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85 | * Used to cancel a group of files
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86 | * <b>key</b>: Group id, <b>value</b>: Boolean (true if
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87 | * the group has to be canceled. Otherwise it is
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88 | * false)
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89 | */
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90 | Hashtable canceledGroup = new Hashtable(); |
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91 | /**
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92 | * <b>key</b>: URL, <b>value</b>: path to the downloaded file.
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93 | */
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94 | Hashtable cachedURItoFile;
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95 | Exception downloadException;
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96 | final String tempDirectoryPath = System.getProperty("java.io.tmpdir")+"/tmp-andami"; |
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97 | |||
98 | public SEDownloader() {
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99 | super();
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100 | characters = "";
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101 | for (int j = 32; j<=127; j++){ |
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102 | characters += (char) j;
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103 | } |
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104 | characters += "?????????????????????????????????????????????????\n\r\f\t??";
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105 | } |
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106 | |||
107 | /**
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108 | * Return the content of a file that has been created
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109 | * from a URL using the HTTP GET protocol
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110 | * @param url
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111 | * The URL
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112 | * @return
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113 | * File containing this URL's content or null if no file was found.
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114 | */
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115 | private File getPreviousDownloadedURL(URL url){ |
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116 | return getPreviousDownloaded(url);
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117 | } |
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118 | |||
119 | /**
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120 | * Return the content of a file that has been created
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121 | * from a URL using the HTTP POST protocol
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122 | * @param url
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123 | * The URL
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124 | * @param data
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125 | * The data to send on the query
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126 | * @return
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127 | * File containing this URL's content or null if no file was found.
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128 | */
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129 | private File getPreviousDownloadedURL(URL url, String data) { |
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130 | if(data == null) |
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131 | return getPreviousDownloaded(url);
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132 | return getPreviousDownloaded(url.toString() + data);
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133 | } |
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134 | |||
135 | /**
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136 | * Returns the content of a URL as a file from the file system.<br>
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137 | * <p>
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138 | * If the URL has been already downloaded in this session and notified
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139 | * to the system using the static <b>Utilities.addDownloadedURL(URL)</b>
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140 | * method, it can be restored faster from the file system avoiding to
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141 | * download it again.
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142 | * </p>
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143 | * @param url
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144 | * @return File containing this URL's content or null if no file was found.
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145 | */
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146 | private File getPreviousDownloaded(Object theurl) { |
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147 | |||
148 | File f = null; |
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149 | Object thekey = null; |
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150 | try {
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151 | if (theurl instanceof URL) { |
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152 | thekey = ((URL) theurl).toURI();
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153 | } else {
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154 | thekey = theurl; |
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155 | } |
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156 | } catch (Exception e) { |
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157 | LOG.info("Warning: did not check url: " + theurl, e);
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158 | return null; |
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159 | } |
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160 | |||
161 | if (cachedURItoFile != null && cachedURItoFile.containsKey(thekey)) { |
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162 | String filePath = (String) cachedURItoFile.get(thekey); |
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163 | f = new File(filePath); |
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164 | if (!f.exists())
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165 | return null; |
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166 | } |
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167 | return f;
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168 | } |
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169 | |||
170 | /**
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171 | * Adds an URL to the table of downloaded files for further uses. If the URL
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172 | * already exists in the table its filePath value is updated to the new one and
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173 | * the old file itself is removed from the file system.
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174 | *
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175 | * @param url
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176 | * @param filePath
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177 | */
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178 | void addDownloadedURL(URL url, String filePath) { |
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179 | if (cachedURItoFile == null) |
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180 | cachedURItoFile = new Hashtable(); |
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181 | |||
182 | URI theuri = null; |
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183 | try {
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184 | theuri = url.toURI(); |
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185 | } catch (Exception e) { |
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186 | LOG.info("Warning: did not cache bad url: " + url, e);
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187 | return;
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188 | } |
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189 | |||
190 | String fileName = (String) cachedURItoFile.put(theuri, filePath); |
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191 | //JMV: No se puede eliminar el anterior porque puede que alguien lo
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192 | // este usando
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193 | /*
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194 | if (fileName!=null){
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195 | File f = new File(fileName);
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196 | if (f.exists())
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197 | f.delete();
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198 | }
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199 | */
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200 | } |
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201 | |||
202 | /**
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203 | * Downloads an URL into a temporary file that is removed the next time the
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204 | * tempFileManager class is called, which means the next time gvSIG is launched.
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205 | *
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206 | * @param url
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207 | * @param name
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208 | * @return
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209 | * @throws IOException
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210 | * @throws ServerErrorResponseException
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211 | * @throws ConnectException
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212 | * @throws UnknownHostException
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213 | */
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214 | public synchronized File downloadFile(URL url, String name, ICancellable cancel) throws IOException,ConnectException, UnknownHostException { |
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215 | File f = null; |
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216 | |||
217 | if ((f = getPreviousDownloadedURL(url)) == null) { |
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218 | File tempDirectory = new File(tempDirectoryPath); |
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219 | if (!tempDirectory.exists())
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220 | tempDirectory.mkdir(); |
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221 | |||
222 | f = new File(calculateFileName(name)); |
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223 | |||
224 | if (cancel == null) { |
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225 | cancel = new ICancellable() {
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226 | public boolean isCanceled() { |
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227 | return false; |
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228 | } |
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229 | public Object getID(){ |
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230 | return SEDownloader.class.getName();
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231 | } |
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232 | }; |
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233 | } |
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234 | |||
235 | Monitor monitorObj = new Monitor(this, cancel); |
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236 | Thread downloader = new Thread(new Downloader(this, url, f, cancel.getID())); |
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237 | Thread monitor = new Thread(monitorObj); |
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238 | |||
239 | monitor.start(); |
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240 | downloader.start(); |
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241 | while(!getCanceled(cancel.getID()) && downloader.isAlive()) {
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242 | try {
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243 | Thread.sleep(latency);
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244 | } catch (InterruptedException e) { |
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245 | LOG.error("Error", e);
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246 | } |
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247 | } |
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248 | |||
249 | try {
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250 | monitorObj.setFinish(true);
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251 | monitor.join(); |
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252 | downloader.join(); |
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253 | } catch (InterruptedException e1) { |
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254 | LOG.warn(e1.getMessage()); |
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255 | } |
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256 | downloader = null;
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257 | monitor = null;
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258 | |||
259 | if (getCanceled(cancel.getID()))
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260 | return null; |
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261 | downloader = null;
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262 | monitor = null;
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263 | if (this.downloadException != null) { |
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264 | Exception e = this.downloadException; |
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265 | if (e instanceof FileNotFoundException) |
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266 | throw (IOException) e; |
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267 | else if (e instanceof IOException) |
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268 | throw (IOException) e; |
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269 | else if (e instanceof ConnectException) |
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270 | throw (ConnectException) e; |
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271 | else if (e instanceof UnknownHostException) |
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272 | throw (UnknownHostException) e; |
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273 | } |
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274 | } else {
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275 | LOG.info(url.toString() + " cached at '" + f.getAbsolutePath() + "'"); |
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276 | } |
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277 | |||
278 | return f;
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279 | } |
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280 | |||
281 | private String calculateFileName(String name) { |
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282 | count ++; |
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283 | int index = name.lastIndexOf("."); |
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284 | if (index > 0){ |
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285 | return tempDirectoryPath + "/" + name.substring(0,index) + System.currentTimeMillis() + count + |
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286 | name.substring(index, name.length()); |
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287 | } |
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288 | return tempDirectoryPath + "/" + name + System.currentTimeMillis() + count; |
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289 | } |
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290 | |||
291 | |||
292 | /**
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293 | * Downloads a URL using the HTTP Post protocol
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294 | * @param url
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295 | * The server URL
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296 | * @param data
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297 | * The data to send in the request
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298 | * @param name
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299 | * A common name for all the retrieved files
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300 | * @param cancel
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301 | * Used to cancel the downloads
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302 | * @return
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303 | * The retrieved file
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304 | * @throws IOException
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305 | * @throws ConnectException
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306 | * @throws UnknownHostException
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307 | */
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308 | public synchronized File downloadFile(URL url, String data, String name, ICancellable cancel) throws IOException,ConnectException, UnknownHostException{ |
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309 | File f = null; |
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310 | |||
311 | if ((f = getPreviousDownloadedURL(url,data)) == null) { |
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312 | File tempDirectory = new File(tempDirectoryPath); |
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313 | if (!tempDirectory.exists())
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314 | tempDirectory.mkdir(); |
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315 | |||
316 | f = new File(calculateFileName(name)); |
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317 | |||
318 | if (cancel == null) { |
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319 | cancel = new ICancellable() {
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320 | public boolean isCanceled() { |
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321 | return false; |
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322 | } |
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323 | public Object getID(){ |
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324 | return SEDownloader.class.getName();
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325 | } |
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326 | }; |
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327 | } |
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328 | Monitor monitorObj = new Monitor(this, cancel); |
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329 | Thread downloader = new Thread(new Downloader(this, url, data, f, cancel.getID())); |
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330 | Thread monitor = new Thread(monitorObj); |
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331 | monitor.start(); |
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332 | downloader.start(); |
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333 | while(!getCanceled(cancel.getID()) && downloader.isAlive()) {
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334 | try {
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335 | Thread.sleep(latency);
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336 | } catch (InterruptedException e) { |
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337 | LOG.error("Error", e);
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338 | } |
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339 | } |
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340 | |||
341 | try {
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342 | monitorObj.setFinish(true);
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343 | monitor.join(); |
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344 | downloader.join(); |
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345 | } catch (InterruptedException e1) { |
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346 | LOG.warn(e1.getMessage()); |
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347 | } |
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348 | downloader = null;
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349 | monitor = null;
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350 | |||
351 | if (getCanceled(cancel.getID()))
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352 | return null; |
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353 | if (this.downloadException!=null) { |
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354 | Exception e = this.downloadException; |
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355 | if (e instanceof FileNotFoundException) |
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356 | throw (IOException) e; |
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357 | else if (e instanceof IOException) |
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358 | throw (IOException) e; |
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359 | else if (e instanceof ConnectException) |
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360 | throw (ConnectException) e; |
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361 | else if (e instanceof UnknownHostException) |
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362 | throw (UnknownHostException) e; |
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363 | } |
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364 | } else {
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365 | LOG.info(url.toString() + " cached at '" + f.getAbsolutePath() + "'"); |
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366 | } |
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367 | |||
368 | return f;
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369 | } |
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370 | |||
371 | /**
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372 | * Try if a group of downloads has been canceled
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373 | * @param groupId
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374 | * Group id
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375 | * @return
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376 | * If the group has been canceled
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377 | */
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378 | protected boolean getCanceled(Object groupId) { |
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379 | Object obj = canceledGroup.get(groupId);
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380 | if (obj != null) { |
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381 | return ((Boolean)obj).booleanValue(); |
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382 | } |
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383 | return false; |
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384 | } |
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385 | |||
386 | /**
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387 | * Cancel a group of downloads
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388 | * @param groupId
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389 | * Group id
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390 | * @param isCanceled
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391 | * if the group has to be canceled
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392 | */
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393 | protected void setCanceled(Object groupId, boolean isCanceled) { |
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394 | if (groupId == null) { |
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395 | groupId = SEDownloader.class.getName(); |
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396 | } |
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397 | canceledGroup.put(groupId,new Boolean(isCanceled)); |
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398 | } |
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399 | |||
400 | /**
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401 | * Cleans every temporal file previously downloaded.
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402 | */
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403 | public void cleanUpTempFiles() { |
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404 | try{
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405 | File tempDirectory = new File(tempDirectoryPath); |
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406 | |||
407 | File[] files = tempDirectory.listFiles(); |
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408 | if (files!=null) { |
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409 | for (int i = 0; i < files.length; i++) { |
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410 | // s?lo por si en un futuro se necesitan crear directorios temporales
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411 | if (files[i].isDirectory()) deleteDirectory(files[i]);
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412 | files[i].delete(); |
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413 | } |
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414 | } |
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415 | tempDirectory.delete(); |
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416 | } catch (Exception e) { } |
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417 | |||
418 | } |
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419 | /**
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420 | * Recursive directory delete.
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421 | * @param f
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422 | */
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423 | private void deleteDirectory(File f) { |
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424 | File[] files = f.listFiles(); |
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425 | for (int i = 0; i < files.length; i++) { |
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426 | if (files[i].isDirectory())
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427 | deleteDirectory(files[i]); |
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428 | files[i].delete(); |
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429 | } |
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430 | |||
431 | } |
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432 | |||
433 | |||
434 | /**
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435 | * Remove an URL from the system cache. The file will remain in the file
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436 | * system for further eventual uses.
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437 | * @param request
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438 | */
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439 | public void removeURL(URL url) { |
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440 | |||
441 | URI theuri = null; |
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442 | |||
443 | try {
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444 | theuri = url.toURI(); |
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445 | } catch (Exception e) { |
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446 | LOG.info("Warning: did not remove bad url: " + url, e);
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447 | return;
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448 | } |
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449 | |||
450 | |||
451 | if (cachedURItoFile != null && cachedURItoFile.containsKey(theuri)) |
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452 | cachedURItoFile.remove(theuri); |
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453 | } |
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454 | |||
455 | /**
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456 | * Remove an URL from the system cache. The file will remain in the file
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457 | * system for further eventual uses.
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458 | * @param request
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459 | */
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460 | public void removeURL(Object url) { |
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461 | if (cachedURItoFile != null && cachedURItoFile.containsKey(url)) |
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462 | cachedURItoFile.remove(url); |
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463 | } |
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464 | } |
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465 | |||
466 | final class Monitor implements Runnable { |
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467 | ICancellable c; |
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468 | private volatile boolean finish = false; |
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469 | SEDownloader downloader; |
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470 | private static Logger LOG = LoggerFactory.getLogger(Monitor.class); |
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471 | |||
472 | public Monitor(SEDownloader downloader, ICancellable cancel) { |
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473 | downloader.setCanceled(cancel.getID(),false);
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474 | this.c = cancel;
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475 | this.downloader = downloader;
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476 | } |
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477 | |||
478 | public void run() { |
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479 | while (!c.isCanceled() && !getFinish()) {
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480 | try {
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481 | Thread.sleep(downloader.latency);
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482 | } catch (InterruptedException e) { |
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483 | LOG.error("Error", e);
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484 | } |
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485 | } |
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486 | |||
487 | /* WARNING!! This works because only one download is being processed at once.
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488 | * You could prefer to start several transfers simultaneously. If so, you
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489 | * should consideer using a non-static variable such is Utilities.canceled to
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490 | * control when and which transfer in particular has been canceled.
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491 | *
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492 | * The feature of transfer several files is at the moment under study. We are
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493 | * planning to add an intelligent system that will give you a lot of services
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494 | * and ease-of-use. So, we encourage you to wait for it instead of write your
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495 | * own code.
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496 | */
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497 | if(c.isCanceled())
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498 | downloader.setCanceled(c.getID(), true);
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499 | } |
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500 | |||
501 | public synchronized void setFinish(boolean value) { |
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502 | finish = value; |
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503 | } |
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504 | |||
505 | public synchronized boolean getFinish() { |
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506 | return finish;
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507 | } |
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508 | } |
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509 | |||
510 | final class Downloader implements Runnable { |
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511 | private URL url = null; |
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512 | private File dstFile = null; |
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513 | private Object groupID = null; |
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514 | private String data = null; |
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515 | private SEDownloader downloader = null; |
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516 | private static Logger LOG = LoggerFactory.getLogger(Downloader.class); |
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517 | |||
518 | public Downloader(SEDownloader downloader, URL url, File dstFile, Object groupID) { |
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519 | this.url = url;
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520 | this.dstFile = dstFile;
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521 | this.groupID = groupID;
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522 | this.downloader = downloader;
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523 | downloader.downloadException = null;
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524 | } |
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525 | |||
526 | public Downloader(SEDownloader downloader, URL url, String data, File dstFile, Object groupID) { |
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527 | this.url = url;
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||
528 | this.data = data;
|
||
529 | this.dstFile = dstFile;
|
||
530 | this.groupID = groupID;
|
||
531 | this.downloader = downloader;
|
||
532 | downloader.downloadException = null;
|
||
533 | } |
||
534 | |||
535 | public void run() { |
||
536 | LOG.info("downloading '" + url.toString() + "' to: " + dstFile.getAbsolutePath()); |
||
537 | if (data != null){ |
||
538 | LOG.info("using POST, request = " + data);
|
||
539 | } |
||
540 | // getting timeout from preferences in milliseconds.
|
||
541 | Preferences prefs = Preferences.userRoot().node( "gvsig.downloader" ); |
||
542 | // by default 1 minute (60000 milliseconds.
|
||
543 | int timeout = prefs.getInt("timeout", 60000); |
||
544 | |||
545 | DataOutputStream dos;
|
||
546 | try {
|
||
547 | DataInputStream is;
|
||
548 | OutputStreamWriter os = null; |
||
549 | HttpURLConnection connection = null; |
||
550 | //If the used protocol is HTTPS
|
||
551 | if (url.getProtocol().equals("https")) { |
||
552 | disableHttsValidation(); |
||
553 | } |
||
554 | connection = (HttpURLConnection)url.openConnection();
|
||
555 | connection.setUseCaches(false);
|
||
556 | connection.setConnectTimeout(timeout); |
||
557 | //If it uses a HTTP POST
|
||
558 | if (data != null) { |
||
559 | connection.setRequestProperty("SOAPAction", "post"); |
||
560 | connection.setRequestMethod("POST");
|
||
561 | connection.setDoOutput(true);
|
||
562 | connection.setRequestProperty("Content-Type", "text/xml; charset=UTF-8"); |
||
563 | os = new OutputStreamWriter(connection.getOutputStream()); |
||
564 | os.write(data); |
||
565 | os.flush(); |
||
566 | is = new DataInputStream(connection.getInputStream()); |
||
567 | }else{
|
||
568 | is = new DataInputStream(url.openStream()); |
||
569 | } |
||
570 | |||
571 | dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(dstFile))); |
||
572 | byte[] buffer = new byte[1024 * 4]; |
||
573 | |||
574 | |||
575 | long readed = 0; |
||
576 | for (int i = is.read(buffer); !downloader.getCanceled(groupID) && i>0; i = is.read(buffer)){ |
||
577 | dos.write(buffer, 0, i);
|
||
578 | readed += i; |
||
579 | |||
580 | } |
||
581 | if(os != null) { |
||
582 | os.close(); |
||
583 | } |
||
584 | dos.close(); |
||
585 | is.close(); |
||
586 | is = null;
|
||
587 | dos = null;
|
||
588 | if (downloader.getCanceled(groupID)) {
|
||
589 | LOG.info("[RemoteServices] '" + url + "' CANCELED."); |
||
590 | dstFile.delete(); |
||
591 | dstFile = null;
|
||
592 | } else {
|
||
593 | downloader.addDownloadedURL(url, dstFile.getAbsolutePath()); |
||
594 | } |
||
595 | } catch (Exception e) { |
||
596 | LOG.info("Error downloading", e);
|
||
597 | downloader.downloadException = e; |
||
598 | } |
||
599 | } |
||
600 | |||
601 | /**
|
||
602 | * This method disables the Https certificate validation.
|
||
603 | * @throws KeyManagementException
|
||
604 | * @throws NoSuchAlgorithmException
|
||
605 | */
|
||
606 | private void disableHttsValidation() throws KeyManagementException, NoSuchAlgorithmException{ |
||
607 | // Create a trust manager that does not validate certificate chains
|
||
608 | TrustManager[] trustAllCerts = new TrustManager[] { |
||
609 | new X509TrustManager() { |
||
610 | public java.security.cert.X509Certificate[] getAcceptedIssuers() { |
||
611 | return null; |
||
612 | } |
||
613 | public void checkClientTrusted( |
||
614 | java.security.cert.X509Certificate[] certs, String authType) { |
||
615 | } |
||
616 | public void checkServerTrusted( |
||
617 | java.security.cert.X509Certificate[] certs, String authType) { |
||
618 | } |
||
619 | } |
||
620 | }; |
||
621 | |||
622 | // Install the all-trusting trust manager
|
||
623 | SSLContext sc = SSLContext.getInstance("SSL"); |
||
624 | sc.init(null, trustAllCerts, new java.security.SecureRandom()); |
||
625 | HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
|
||
626 | } |
||
627 | } |