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 @ 40559
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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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 3
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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., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | 40435 | jjdelcerro | package org.gvsig.compat.se.net; |
25 | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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26 | *
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27 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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28 | *
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29 | * This program is free software; you can redistribute it and/or
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30 | * modify it under the terms of the GNU General Public License
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31 | * as published by the Free Software Foundation; either version 2
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32 | * of the License, or (at your option) any later version.
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33 | *
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34 | * This program is distributed in the hope that it will be useful,
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35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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37 | * GNU General Public License for more details.
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38 | *
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39 | * You should have received a copy of the GNU General Public License
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40 | * along with this program; if not, write to the Free Software
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41 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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42 | *
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43 | * For more information, contact:
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44 | *
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45 | * Generalitat Valenciana
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46 | * Conselleria d'Infraestructures i Transport
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47 | * Av. Blasco Ib??ez, 50
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48 | * 46010 VALENCIA
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49 | * SPAIN
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50 | *
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51 | * +34 963862235
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52 | * gvsig@gva.es
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53 | * www.gvsig.gva.es
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54 | *
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55 | * or
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56 | *
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57 | * IVER T.I. S.A
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58 | * Salamanca 50
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59 | * 46005 Valencia
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60 | * Spain
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61 | *
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62 | * +34 963163400
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63 | * dac@iver.es
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64 | */
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65 | |||
66 | import java.io.BufferedOutputStream; |
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67 | import java.io.DataInputStream; |
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68 | import java.io.DataOutputStream; |
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69 | import java.io.File; |
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70 | import java.io.FileNotFoundException; |
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71 | import java.io.FileOutputStream; |
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72 | import java.io.IOException; |
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73 | import java.io.OutputStreamWriter; |
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74 | import java.net.ConnectException; |
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75 | import java.net.HttpURLConnection; |
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76 | import java.net.URI; |
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77 | import java.net.URL; |
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78 | import java.net.UnknownHostException; |
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79 | import java.security.KeyManagementException; |
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80 | import java.security.NoSuchAlgorithmException; |
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81 | import java.util.Hashtable; |
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82 | import java.util.prefs.Preferences; |
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83 | |||
84 | import javax.net.ssl.HttpsURLConnection; |
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85 | import javax.net.ssl.SSLContext; |
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86 | import javax.net.ssl.TrustManager; |
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87 | import javax.net.ssl.X509TrustManager; |
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88 | |||
89 | import org.slf4j.Logger; |
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90 | import org.slf4j.LoggerFactory; |
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91 | |||
92 | import org.gvsig.compat.net.ICancellable; |
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93 | |||
94 | |||
95 | /**
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96 | * Clase con m?todos de utilidad en el protocolo WMS
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97 | *
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98 | * @authors Laura D?az, jaume dominguez faus
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99 | */
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100 | public class SEDownloader implements org.gvsig.compat.net.Downloader{ |
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101 | String characters;
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102 | boolean canceled;
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103 | final long latency = 500; |
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104 | private static int count = 0; |
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105 | private static Logger LOG = LoggerFactory.getLogger(SEDownloader.class); |
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106 | |||
107 | /**
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108 | * Used to cancel a group of files
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109 | * <b>key</b>: Group id, <b>value</b>: Boolean (true if
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110 | * the group has to be canceled. Otherwise it is
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111 | * false)
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112 | */
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113 | Hashtable canceledGroup = new Hashtable(); |
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114 | /**
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115 | * <b>key</b>: URL, <b>value</b>: path to the downloaded file.
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116 | */
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117 | Hashtable cachedURItoFile;
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118 | Exception downloadException;
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119 | final String tempDirectoryPath = System.getProperty("java.io.tmpdir")+"/tmp-andami"; |
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120 | |||
121 | public SEDownloader() {
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122 | super();
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123 | characters = "";
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124 | for (int j = 32; j<=127; j++){ |
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125 | characters += (char) j;
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126 | } |
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127 | characters += "?????????????????????????????????????????????????\n\r\f\t??";
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128 | } |
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129 | |||
130 | /**
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131 | * Return the content of a file that has been created
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132 | * from a URL using the HTTP GET protocol
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133 | * @param url
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134 | * The URL
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135 | * @return
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136 | * File containing this URL's content or null if no file was found.
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137 | */
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138 | private File getPreviousDownloadedURL(URL url){ |
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139 | return getPreviousDownloaded(url);
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140 | } |
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141 | |||
142 | /**
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143 | * Return the content of a file that has been created
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144 | * from a URL using the HTTP POST protocol
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145 | * @param url
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146 | * The URL
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147 | * @param data
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148 | * The data to send on the query
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149 | * @return
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150 | * File containing this URL's content or null if no file was found.
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151 | */
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152 | private File getPreviousDownloadedURL(URL url, String data) { |
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153 | if(data == null) |
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154 | return getPreviousDownloaded(url);
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155 | return getPreviousDownloaded(url.toString() + data);
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156 | } |
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157 | |||
158 | /**
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159 | * Returns the content of a URL as a file from the file system.<br>
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160 | * <p>
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161 | * If the URL has been already downloaded in this session and notified
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162 | * to the system using the static <b>Utilities.addDownloadedURL(URL)</b>
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163 | * method, it can be restored faster from the file system avoiding to
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164 | * download it again.
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165 | * </p>
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166 | * @param url
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167 | * @return File containing this URL's content or null if no file was found.
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168 | */
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169 | private File getPreviousDownloaded(Object theurl) { |
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170 | |||
171 | File f = null; |
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172 | Object thekey = null; |
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173 | try {
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174 | if (theurl instanceof URL) { |
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175 | thekey = ((URL) theurl).toURI();
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176 | } else {
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177 | thekey = theurl; |
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178 | } |
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179 | } catch (Exception e) { |
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180 | LOG.info("Warning: did not check url: " + theurl, e);
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181 | return null; |
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182 | } |
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183 | |||
184 | if (cachedURItoFile != null && cachedURItoFile.containsKey(thekey)) { |
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185 | String filePath = (String) cachedURItoFile.get(thekey); |
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186 | f = new File(filePath); |
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187 | if (!f.exists())
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188 | return null; |
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189 | } |
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190 | return f;
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191 | } |
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192 | |||
193 | /**
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194 | * Adds an URL to the table of downloaded files for further uses. If the URL
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195 | * already exists in the table its filePath value is updated to the new one and
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196 | * the old file itself is removed from the file system.
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197 | *
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198 | * @param url
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199 | * @param filePath
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200 | */
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201 | void addDownloadedURL(URL url, String filePath) { |
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202 | if (cachedURItoFile == null) |
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203 | cachedURItoFile = new Hashtable(); |
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204 | |||
205 | URI theuri = null; |
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206 | try {
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207 | theuri = url.toURI(); |
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208 | } catch (Exception e) { |
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209 | LOG.info("Warning: did not cache bad url: " + url, e);
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210 | return;
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211 | } |
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212 | |||
213 | String fileName = (String) cachedURItoFile.put(theuri, filePath); |
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214 | //JMV: No se puede eliminar el anterior porque puede que alguien lo
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215 | // este usando
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216 | /*
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217 | if (fileName!=null){
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218 | File f = new File(fileName);
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219 | if (f.exists())
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220 | f.delete();
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221 | }
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222 | */
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223 | } |
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224 | |||
225 | /**
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226 | * Downloads an URL into a temporary file that is removed the next time the
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227 | * tempFileManager class is called, which means the next time gvSIG is launched.
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228 | *
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229 | * @param url
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230 | * @param name
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231 | * @return
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232 | * @throws IOException
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233 | * @throws ServerErrorResponseException
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234 | * @throws ConnectException
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235 | * @throws UnknownHostException
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236 | */
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237 | public synchronized File downloadFile(URL url, String name, ICancellable cancel) throws IOException,ConnectException, UnknownHostException { |
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238 | File f = null; |
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239 | |||
240 | if ((f = getPreviousDownloadedURL(url)) == null) { |
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241 | File tempDirectory = new File(tempDirectoryPath); |
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242 | if (!tempDirectory.exists())
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243 | tempDirectory.mkdir(); |
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244 | |||
245 | f = new File(calculateFileName(name)); |
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246 | |||
247 | if (cancel == null) { |
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248 | cancel = new ICancellable() {
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249 | public boolean isCanceled() { |
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250 | return false; |
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251 | } |
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252 | public Object getID(){ |
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253 | return SEDownloader.class.getName();
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254 | } |
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255 | }; |
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256 | } |
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257 | |||
258 | Monitor monitorObj = new Monitor(this, cancel); |
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259 | Thread downloader = new Thread(new Downloader(this, url, f, cancel.getID())); |
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260 | Thread monitor = new Thread(monitorObj); |
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261 | |||
262 | monitor.start(); |
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263 | downloader.start(); |
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264 | while(!getCanceled(cancel.getID()) && downloader.isAlive()) {
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265 | try {
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266 | Thread.sleep(latency);
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267 | } catch (InterruptedException e) { |
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268 | LOG.error("Error", e);
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269 | } |
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270 | } |
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271 | |||
272 | try {
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273 | monitorObj.setFinish(true);
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274 | monitor.join(); |
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275 | downloader.join(); |
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276 | } catch (InterruptedException e1) { |
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277 | LOG.warn(e1.getMessage()); |
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278 | } |
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279 | downloader = null;
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280 | monitor = null;
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281 | |||
282 | if (getCanceled(cancel.getID()))
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283 | return null; |
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284 | downloader = null;
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285 | monitor = null;
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286 | if (this.downloadException != null) { |
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287 | Exception e = this.downloadException; |
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288 | if (e instanceof FileNotFoundException) |
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289 | throw (IOException) e; |
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290 | else if (e instanceof IOException) |
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291 | throw (IOException) e; |
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292 | else if (e instanceof ConnectException) |
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293 | throw (ConnectException) e; |
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294 | else if (e instanceof UnknownHostException) |
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295 | throw (UnknownHostException) e; |
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296 | } |
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297 | } else {
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298 | LOG.info(url.toString() + " cached at '" + f.getAbsolutePath() + "'"); |
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299 | } |
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300 | |||
301 | return f;
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302 | } |
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303 | |||
304 | private String calculateFileName(String name) { |
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305 | count ++; |
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306 | int index = name.lastIndexOf("."); |
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307 | if (index > 0){ |
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308 | return tempDirectoryPath + "/" + name.substring(0,index) + System.currentTimeMillis() + count + |
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309 | name.substring(index, name.length()); |
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310 | } |
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311 | return tempDirectoryPath + "/" + name + System.currentTimeMillis() + count; |
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312 | } |
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313 | |||
314 | |||
315 | /**
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316 | * Downloads a URL using the HTTP Post protocol
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317 | * @param url
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318 | * The server URL
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319 | * @param data
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320 | * The data to send in the request
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321 | * @param name
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322 | * A common name for all the retrieved files
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323 | * @param cancel
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324 | * Used to cancel the downloads
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325 | * @return
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326 | * The retrieved file
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327 | * @throws IOException
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328 | * @throws ConnectException
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329 | * @throws UnknownHostException
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330 | */
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331 | public synchronized File downloadFile(URL url, String data, String name, ICancellable cancel) throws IOException,ConnectException, UnknownHostException{ |
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332 | File f = null; |
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333 | |||
334 | if ((f = getPreviousDownloadedURL(url,data)) == null) { |
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335 | File tempDirectory = new File(tempDirectoryPath); |
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336 | if (!tempDirectory.exists())
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337 | tempDirectory.mkdir(); |
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338 | |||
339 | f = new File(calculateFileName(name)); |
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340 | |||
341 | if (cancel == null) { |
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342 | cancel = new ICancellable() {
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343 | public boolean isCanceled() { |
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344 | return false; |
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345 | } |
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346 | public Object getID(){ |
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347 | return SEDownloader.class.getName();
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348 | } |
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349 | }; |
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350 | } |
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351 | Monitor monitorObj = new Monitor(this, cancel); |
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352 | Thread downloader = new Thread(new Downloader(this, url, data, f, cancel.getID())); |
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353 | Thread monitor = new Thread(monitorObj); |
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354 | monitor.start(); |
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355 | downloader.start(); |
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356 | while(!getCanceled(cancel.getID()) && downloader.isAlive()) {
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357 | try {
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358 | Thread.sleep(latency);
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359 | } catch (InterruptedException e) { |
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360 | LOG.error("Error", e);
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361 | } |
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362 | } |
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363 | |||
364 | try {
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365 | monitorObj.setFinish(true);
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366 | monitor.join(); |
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367 | downloader.join(); |
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368 | } catch (InterruptedException e1) { |
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369 | LOG.warn(e1.getMessage()); |
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370 | } |
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371 | downloader = null;
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372 | monitor = null;
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373 | |||
374 | if (getCanceled(cancel.getID()))
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375 | return null; |
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376 | if (this.downloadException!=null) { |
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377 | Exception e = this.downloadException; |
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378 | if (e instanceof FileNotFoundException) |
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379 | throw (IOException) e; |
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380 | else if (e instanceof IOException) |
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381 | throw (IOException) e; |
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382 | else if (e instanceof ConnectException) |
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383 | throw (ConnectException) e; |
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384 | else if (e instanceof UnknownHostException) |
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385 | throw (UnknownHostException) e; |
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386 | } |
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387 | } else {
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388 | LOG.info(url.toString() + " cached at '" + f.getAbsolutePath() + "'"); |
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389 | } |
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390 | |||
391 | return f;
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392 | } |
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393 | |||
394 | /**
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395 | * Try if a group of downloads has been canceled
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396 | * @param groupId
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397 | * Group id
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398 | * @return
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399 | * If the group has been canceled
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400 | */
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401 | protected boolean getCanceled(Object groupId) { |
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402 | Object obj = canceledGroup.get(groupId);
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403 | if (obj != null) { |
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404 | return ((Boolean)obj).booleanValue(); |
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405 | } |
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406 | return false; |
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407 | } |
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408 | |||
409 | /**
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410 | * Cancel a group of downloads
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411 | * @param groupId
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412 | * Group id
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413 | * @param isCanceled
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414 | * if the group has to be canceled
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415 | */
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416 | protected void setCanceled(Object groupId, boolean isCanceled) { |
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417 | if (groupId == null) { |
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418 | groupId = SEDownloader.class.getName(); |
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419 | } |
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420 | canceledGroup.put(groupId,new Boolean(isCanceled)); |
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421 | } |
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422 | |||
423 | /**
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424 | * Cleans every temporal file previously downloaded.
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425 | */
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426 | public void cleanUpTempFiles() { |
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427 | try{
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428 | File tempDirectory = new File(tempDirectoryPath); |
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429 | |||
430 | File[] files = tempDirectory.listFiles(); |
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431 | if (files!=null) { |
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432 | for (int i = 0; i < files.length; i++) { |
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433 | // s?lo por si en un futuro se necesitan crear directorios temporales
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434 | if (files[i].isDirectory()) deleteDirectory(files[i]);
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435 | files[i].delete(); |
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436 | } |
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437 | } |
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438 | tempDirectory.delete(); |
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439 | } catch (Exception e) { } |
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440 | |||
441 | } |
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442 | /**
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443 | * Recursive directory delete.
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444 | * @param f
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445 | */
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446 | private void deleteDirectory(File f) { |
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447 | File[] files = f.listFiles(); |
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448 | for (int i = 0; i < files.length; i++) { |
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449 | if (files[i].isDirectory())
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450 | deleteDirectory(files[i]); |
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451 | files[i].delete(); |
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452 | } |
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453 | |||
454 | } |
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455 | |||
456 | |||
457 | /**
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458 | * Remove an URL from the system cache. The file will remain in the file
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459 | * system for further eventual uses.
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460 | * @param request
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461 | */
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462 | public void removeURL(URL url) { |
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463 | |||
464 | URI theuri = null; |
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465 | |||
466 | try {
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467 | theuri = url.toURI(); |
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468 | } catch (Exception e) { |
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469 | LOG.info("Warning: did not remove bad url: " + url, e);
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470 | return;
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471 | } |
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472 | |||
473 | |||
474 | if (cachedURItoFile != null && cachedURItoFile.containsKey(theuri)) |
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475 | cachedURItoFile.remove(theuri); |
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476 | } |
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477 | |||
478 | /**
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479 | * Remove an URL from the system cache. The file will remain in the file
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480 | * system for further eventual uses.
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481 | * @param request
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482 | */
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483 | public void removeURL(Object url) { |
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484 | if (cachedURItoFile != null && cachedURItoFile.containsKey(url)) |
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485 | cachedURItoFile.remove(url); |
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486 | } |
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487 | } |
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488 | |||
489 | final class Monitor implements Runnable { |
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490 | ICancellable c; |
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491 | private volatile boolean finish = false; |
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492 | SEDownloader downloader; |
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493 | private static Logger LOG = LoggerFactory.getLogger(Monitor.class); |
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494 | |||
495 | public Monitor(SEDownloader downloader, ICancellable cancel) { |
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496 | downloader.setCanceled(cancel.getID(),false);
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497 | this.c = cancel;
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498 | this.downloader = downloader;
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499 | } |
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500 | |||
501 | public void run() { |
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502 | while (!c.isCanceled() && !getFinish()) {
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503 | try {
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504 | Thread.sleep(downloader.latency);
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505 | } catch (InterruptedException e) { |
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506 | LOG.error("Error", e);
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507 | } |
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508 | } |
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509 | |||
510 | /* WARNING!! This works because only one download is being processed at once.
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511 | * You could prefer to start several transfers simultaneously. If so, you
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512 | * should consideer using a non-static variable such is Utilities.canceled to
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513 | * control when and which transfer in particular has been canceled.
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514 | *
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515 | * The feature of transfer several files is at the moment under study. We are
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516 | * planning to add an intelligent system that will give you a lot of services
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517 | * and ease-of-use. So, we encourage you to wait for it instead of write your
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518 | * own code.
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519 | */
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520 | if(c.isCanceled())
|
||
521 | downloader.setCanceled(c.getID(), true);
|
||
522 | } |
||
523 | |||
524 | public synchronized void setFinish(boolean value) { |
||
525 | finish = value; |
||
526 | } |
||
527 | |||
528 | public synchronized boolean getFinish() { |
||
529 | return finish;
|
||
530 | } |
||
531 | } |
||
532 | |||
533 | final class Downloader implements Runnable { |
||
534 | private URL url = null; |
||
535 | private File dstFile = null; |
||
536 | private Object groupID = null; |
||
537 | private String data = null; |
||
538 | private SEDownloader downloader = null; |
||
539 | private static Logger LOG = LoggerFactory.getLogger(Downloader.class); |
||
540 | |||
541 | public Downloader(SEDownloader downloader, URL url, File dstFile, Object groupID) { |
||
542 | this.url = url;
|
||
543 | this.dstFile = dstFile;
|
||
544 | this.groupID = groupID;
|
||
545 | this.downloader = downloader;
|
||
546 | downloader.downloadException = null;
|
||
547 | } |
||
548 | |||
549 | public Downloader(SEDownloader downloader, URL url, String data, File dstFile, Object groupID) { |
||
550 | this.url = url;
|
||
551 | this.data = data;
|
||
552 | this.dstFile = dstFile;
|
||
553 | this.groupID = groupID;
|
||
554 | this.downloader = downloader;
|
||
555 | downloader.downloadException = null;
|
||
556 | } |
||
557 | |||
558 | public void run() { |
||
559 | LOG.info("downloading '" + url.toString() + "' to: " + dstFile.getAbsolutePath()); |
||
560 | if (data != null){ |
||
561 | LOG.info("using POST, request = " + data);
|
||
562 | } |
||
563 | // getting timeout from preferences in milliseconds.
|
||
564 | Preferences prefs = Preferences.userRoot().node( "gvsig.downloader" ); |
||
565 | // by default 1 minute (60000 milliseconds.
|
||
566 | int timeout = prefs.getInt("timeout", 60000); |
||
567 | |||
568 | DataOutputStream dos;
|
||
569 | try {
|
||
570 | DataInputStream is;
|
||
571 | OutputStreamWriter os = null; |
||
572 | HttpURLConnection connection = null; |
||
573 | //If the used protocol is HTTPS
|
||
574 | if (url.getProtocol().equals("https")) { |
||
575 | disableHttsValidation(); |
||
576 | } |
||
577 | connection = (HttpURLConnection)url.openConnection();
|
||
578 | connection.setUseCaches(false);
|
||
579 | connection.setConnectTimeout(timeout); |
||
580 | //If it uses a HTTP POST
|
||
581 | if (data != null) { |
||
582 | connection.setRequestProperty("SOAPAction", "post"); |
||
583 | connection.setRequestMethod("POST");
|
||
584 | connection.setDoOutput(true);
|
||
585 | connection.setRequestProperty("Content-Type", "text/xml; charset=UTF-8"); |
||
586 | os = new OutputStreamWriter(connection.getOutputStream()); |
||
587 | os.write(data); |
||
588 | os.flush(); |
||
589 | is = new DataInputStream(connection.getInputStream()); |
||
590 | }else{
|
||
591 | is = new DataInputStream(url.openStream()); |
||
592 | } |
||
593 | |||
594 | dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(dstFile))); |
||
595 | byte[] buffer = new byte[1024 * 4]; |
||
596 | |||
597 | |||
598 | long readed = 0; |
||
599 | for (int i = is.read(buffer); !downloader.getCanceled(groupID) && i>0; i = is.read(buffer)){ |
||
600 | dos.write(buffer, 0, i);
|
||
601 | readed += i; |
||
602 | |||
603 | } |
||
604 | if(os != null) { |
||
605 | os.close(); |
||
606 | } |
||
607 | dos.close(); |
||
608 | is.close(); |
||
609 | is = null;
|
||
610 | dos = null;
|
||
611 | if (downloader.getCanceled(groupID)) {
|
||
612 | LOG.info("[RemoteServices] '" + url + "' CANCELED."); |
||
613 | dstFile.delete(); |
||
614 | dstFile = null;
|
||
615 | } else {
|
||
616 | downloader.addDownloadedURL(url, dstFile.getAbsolutePath()); |
||
617 | } |
||
618 | } catch (Exception e) { |
||
619 | LOG.info("Error downloading", e);
|
||
620 | downloader.downloadException = e; |
||
621 | } |
||
622 | } |
||
623 | |||
624 | /**
|
||
625 | * This method disables the Https certificate validation.
|
||
626 | * @throws KeyManagementException
|
||
627 | * @throws NoSuchAlgorithmException
|
||
628 | */
|
||
629 | private void disableHttsValidation() throws KeyManagementException, NoSuchAlgorithmException{ |
||
630 | // Create a trust manager that does not validate certificate chains
|
||
631 | TrustManager[] trustAllCerts = new TrustManager[] { |
||
632 | new X509TrustManager() { |
||
633 | public java.security.cert.X509Certificate[] getAcceptedIssuers() { |
||
634 | return null; |
||
635 | } |
||
636 | public void checkClientTrusted( |
||
637 | java.security.cert.X509Certificate[] certs, String authType) { |
||
638 | } |
||
639 | public void checkServerTrusted( |
||
640 | java.security.cert.X509Certificate[] certs, String authType) { |
||
641 | } |
||
642 | } |
||
643 | }; |
||
644 | |||
645 | // Install the all-trusting trust manager
|
||
646 | SSLContext sc = SSLContext.getInstance("SSL"); |
||
647 | sc.init(null, trustAllCerts, new java.security.SecureRandom()); |
||
648 | HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
|
||
649 | } |
||
650 | } |