dropbox_download.php 16 KB

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  1. <?php //$id: $
  2. /* For licensing terms, see /dokeos_license.txt */
  3. /*
  4. ==============================================================================
  5. INIT SECTION
  6. ==============================================================================
  7. */
  8. // we cannot use dropbox_init.inc.php because this one already outputs data.
  9. //name of langfile
  10. // name of the language file that needs to be included
  11. $language_file = "dropbox";
  12. // including the basic Dokeos initialisation file
  13. require("../inc/global.inc.php");
  14. // the dropbox configuration parameters
  15. include_once('dropbox_config.inc.php');
  16. // the dropbox file that contains additional functions
  17. include_once('dropbox_functions.inc.php');
  18. // the dropbox class
  19. require_once( "dropbox_class.inc.php");
  20. //
  21. include_once(api_get_path(LIBRARY_PATH).'/document.lib.php');
  22. /*
  23. ==============================================================================
  24. DOWNLOAD A FOLDER
  25. ==============================================================================
  26. */
  27. if ( isset($_GET['cat_id']) AND is_numeric($_GET['cat_id']) AND $_GET['action']=='downloadcategory' AND isset($_GET['sent_received']) )
  28. {
  29. // step 1: constructingd' the sql statement. Due to the nature off the classes of the dropbox the categories for sent files are stored in the table
  30. // dropbox_file while the categories for the received files are stored in dropbox_post. It would have been more elegant if these could be stored
  31. // in dropbox_person (which stores the link file-person)
  32. // Therefore we have to create to separate sql statements to find which files are in the categorie (depending if we zip-download a sent category or a
  33. // received category)
  34. if ($_GET['sent_received']=='sent')
  35. {
  36. // here we also incorporate the person table to make sure that deleted sent documents are not included.
  37. $sql="SELECT DISTINCT file.id, file.filename, file.title FROM ".$dropbox_cnf["tbl_file"]." file, ".$dropbox_cnf["tbl_person"]." person
  38. WHERE file.uploader_id='".mysql_real_escape_string($_user['user_id'])."'
  39. AND file.cat_id='".mysql_real_escape_string($_GET['cat_id'])."'
  40. AND person.user_id='".mysql_real_escape_string($_user['user_id'])."'
  41. AND person.file_id=file.id
  42. " ;
  43. }
  44. if ($_GET['sent_received']=='received')
  45. {
  46. $sql="SELECT DISTINCT file.id, file.filename, file.title FROM ".$dropbox_cnf["tbl_file"]." file, ".$dropbox_cnf["tbl_person"]." person, ".$dropbox_cnf["tbl_post"]." post
  47. WHERE post.cat_id='".mysql_real_escape_string($_GET['cat_id'])."'
  48. AND person.user_id='".mysql_real_escape_string($_user['user_id'])."'
  49. AND person.file_id=file.id
  50. AND post.file_id=file.id
  51. " ;
  52. }
  53. $result=api_sql_query($sql,__FILE__,__LINE__);
  54. while ($row=mysql_fetch_array($result))
  55. {
  56. $files_to_download[]=$row['id'];
  57. }
  58. if (!is_array($files_to_download) OR empty($files_to_download))
  59. {
  60. header ("location: index.php?view=".$_GET['sent_received']."&error=ErrorNoFilesInFolder");
  61. exit;
  62. }
  63. zip_download($files_to_download);
  64. exit;
  65. }
  66. /*
  67. ==============================================================================
  68. DOWNLOAD A FILE
  69. ==============================================================================
  70. */
  71. /*
  72. ------------------------------------------------------------------------------
  73. AUTHORIZATION
  74. ------------------------------------------------------------------------------
  75. */
  76. // Check if the id makes sense
  77. if ( ! isset( $_GET['id']) || ! is_numeric( $_GET['id']))
  78. {
  79. Display::display_header($nameTools,"Dropbox");
  80. Display :: display_error_message(get_lang('Error'));
  81. Display::display_footer();
  82. exit;
  83. }
  84. // Check if the user is allowed to download the file
  85. $allowed_to_download=false;
  86. // Check if the user has sent or received the file.
  87. $sql="SELECT * FROM ".$dropbox_cnf["tbl_person"]." WHERE file_id='".mysql_real_escape_string($_GET['id'])."' AND user_id='".mysql_real_escape_string($_user['user_id'])."'";
  88. $result=api_sql_query($sql);
  89. if (mysql_num_rows($result)>0)
  90. {
  91. $allowed_to_download=true;
  92. }
  93. /*
  94. ------------------------------------------------------------------------------
  95. ERROR IF NOT ALLOWED TO DOWNLOAD
  96. ------------------------------------------------------------------------------
  97. */
  98. if (!$allowed_to_download)
  99. {
  100. Display::display_header($nameTools,"Dropbox");
  101. Display :: display_error_message(get_lang('YouAreNotAllowedToDownloadThisFile'));
  102. Display::display_footer();
  103. exit;
  104. }
  105. /*
  106. ------------------------------------------------------------------------------
  107. DOWNLOAD THE FILE
  108. ------------------------------------------------------------------------------
  109. */
  110. // the user is allowed to download the file
  111. else
  112. {
  113. $_SESSION['_seen'][$_course['id']][TOOL_DROPBOX][]=$_GET['id'];
  114. $work = new Dropbox_work($_GET['id']);
  115. $path = dropbox_cnf("sysPath") . "/" . $work -> filename; //path to file as stored on server
  116. $file = $work->title;
  117. require_once(api_get_path(LIBRARY_PATH) . '/document.lib.php');
  118. $mimetype = DocumentManager::file_get_mime_type(TRUE);
  119. $fileparts = explode( '.', $file);
  120. $filepartscount = count( $fileparts);
  121. if ( ( $filepartscount > 1) && isset( $mimetype[$fileparts [$filepartscount - 1]]) && $_GET['action']<>'download')
  122. {
  123. // give hint to browser about filetype
  124. header( "Content-type: " . $mimetype[$fileparts [$filepartscount - 1]] . "\n");
  125. }
  126. else
  127. {
  128. //no information about filetype: force a download dialog window in browser
  129. header( "Content-type: application/octet-stream\n");
  130. }
  131. if (!in_array(strtolower($fileparts [$filepartscount - 1]), array('doc','xls','ppt','pps','sxw','sxc','sxi')))
  132. {
  133. header('Content-Disposition: inline; filename='.$file); // bugs with open office
  134. }
  135. else
  136. {
  137. header('Content-Disposition: attachment; filename='.$file);
  138. }
  139. /**
  140. * Note that if you use these two headers from a previous example:
  141. * header('Cache-Control: no-cache, must-revalidate');
  142. * header('Pragma: no-cache');
  143. * before sending a file to the browser, the "Open" option on Internet Explorer's file download dialog will not work properly. If the user clicks "Open" instead of "Save," the target application will open an empty file, because the downloaded file was not cached. The user will have to save the file to their hard drive in order to use it.
  144. * Make sure to leave these headers out if you'd like your visitors to be able to use IE's "Open" option.
  145. */
  146. header( "Pragma: \n");
  147. header( "Cache-Control: \n");
  148. header( "Cache-Control: public\n"); // IE cannot download from sessions without a cache
  149. /*if ( isset( $_SERVER["HTTPS"]))
  150. {
  151. /**
  152. * We need to set the following headers to make downloads work using IE in HTTPS mode.
  153. *
  154. //header( "Pragma: ");
  155. //header( "Cache-Control: ");
  156. header( "Expires: Mon, 26 Jul 1997 05:00:00 GMT\n");
  157. header( "Last-Modified: " . gmdate( "D, d M Y H:i:s") . " GMT\n");
  158. header( "Cache-Control: no-store, no-cache, must-revalidate\n"); // HTTP/1.1
  159. header( "Cache-Control: post-check=0, pre-check=0\n", false);
  160. }*/
  161. header( "Content-Description: " . trim( htmlentities( $file)) . "\n");
  162. header( "Content-Transfer-Encoding: binary\n");
  163. header( "Content-Length: " . filesize( $path)."\n" );
  164. $fp = fopen( $path, "rb");
  165. fpassthru( $fp);
  166. exit();
  167. }
  168. // $Id: dropbox_download.php,v 1.10 2005/05/19 14:41:30 renehaentjens Exp $
  169. /*
  170. ==============================================================================
  171. Dokeos - elearning and course management software
  172. Copyright (c) 2004 Dokeos S.A.
  173. Copyright (c) 2003 Ghent University (UGent)
  174. Copyright (c) 2001 Universite catholique de Louvain (UCL)
  175. Copyright (c) Jan Bols
  176. Copyright (c) Rene Haentjens
  177. For a full list of contributors, see "credits.txt".
  178. The full license can be read in "license.txt".
  179. This program is free software; you can redistribute it and/or
  180. modify it under the terms of the GNU General Public License
  181. as published by the Free Software Foundation; either version 2
  182. of the License, or (at your option) any later version.
  183. See the GNU General Public License for more details.
  184. Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
  185. ==============================================================================
  186. */
  187. /**
  188. ==============================================================================
  189. * Dropbox module for Claroline
  190. * handles downloads of files. Direct downloading is prevented because of an .htaccess file in the
  191. * dropbox directory. So everything goes through this script.
  192. *
  193. * 1. Initialising vars
  194. * 2. Authorisation
  195. * 3. Sanity check of get data & file
  196. * 4. Send headers
  197. * 5. Send file
  198. *
  199. *
  200. * NOTE :
  201. * When testing this with PHP4.0.4 on WinXP and Apache2 there were problems with downloading in IE6
  202. * After searching the only explanation I could find is a problem with the headers:
  203. *
  204. * HEADERS SENT WITH PHP4.3:
  205. * HTTP/1.1�200�OK(CR)
  206. * (LF)
  207. * Date:�Fri,�12�Sep�2003�19:07:33�GMT(CR)
  208. * (LF)
  209. * Server:�Apache/2.0.47�(Win32)�PHP/4.3.3(CR)
  210. * (LF)
  211. * X-Powered-By:�PHP/4.3.3(CR)
  212. * (LF)
  213. * Set-Cookie:�PHPSESSID=06880edcc8363be3f60929576fc1bc6e;�path=/(CR)
  214. * (LF)
  215. * Expires:�Thu,�19�Nov�1981�08:52:00�GMT(CR)
  216. * (LF)
  217. * Cache-Control:�public(CR)
  218. * (LF)
  219. * Pragma:�(CR)
  220. * (LF)
  221. * Content-Transfer-Encoding:�binary(CR)
  222. * (LF)
  223. * Content-Disposition:�attachment;�filename=SV-262E4.png(CR)
  224. * (LF)
  225. * Content-Length:�92178(CR)
  226. * (LF)
  227. * Connection:�close(CR)
  228. * (LF)
  229. * Content-Type:�application/octet-stream(CR)
  230. * (LF)
  231. * (CR)
  232. * (LF)
  233. *
  234. * HEADERS SENT WITH PHP4.0.4:
  235. * HTTP/1.1�200�OK(CR)
  236. * (LF)
  237. * Date:�Fri,�12�Sep�2003�18:28:21�GMT(CR)
  238. * (LF)
  239. * Server:�Apache/2.0.47�(Win32)(CR)
  240. * (LF)
  241. * X-Powered-By:�PHP/4.0.4(CR)
  242. * (LF)
  243. * Expires:�Thu,�19�Nov�1981�08:52:00�GMT(CR)
  244. * (LF)
  245. * Cache-Control:�no-store,�no-cache,�must-revalidate,�post-check=0,�pre-check=0,�,�public(CR)
  246. * (LF)
  247. * Pragma:�no-cache,�(CR)
  248. * (LF)
  249. * Content-Disposition:�attachment;�filename=SV-262E4.png(CR)
  250. * (LF)
  251. * Content-Transfer-Encoding:�binary(CR)
  252. * (LF)
  253. * Set-Cookie:�PHPSESSID=0a5b1c1b9d5e3b474fef359ee55e82d0;�path=/(CR)
  254. * (LF)
  255. * Content-Length:�92178(CR)
  256. * (LF)
  257. * Connection:�close(CR)
  258. * (LF)
  259. * Content-Type:�application/octet-stream(CR)
  260. * (LF)
  261. * (CR)
  262. * (LF)
  263. *
  264. * As you can see the there is a difference in the Cache-Control directive. I suspect that this
  265. * explains the problem. Also take a look at http://bugs.php.net/bug.php?id=16458.
  266. *
  267. * @version 1.21
  268. * @copyright 2004-2005
  269. * @author Jan Bols <jan@ivpv.UGent.be>, main programmer
  270. * @author Ren� Haentjens <rene.haentjens@UGent.be>, several contributions (see RH)
  271. * @author Roan Embrechts, virtual course support
  272. *
  273. * @package dokeos.dropbox
  274. ==============================================================================
  275. */
  276. /*
  277. ==============================================================================
  278. INITIALISING VARIABLES
  279. ==============================================================================
  280. */
  281. require_once( "dropbox_init.inc.php"); //only call init1 because init2 outputs data
  282. require_once( "dropbox_class.inc.php");
  283. /*
  284. ==============================================================================
  285. AUTHORISATION SECTION
  286. ==============================================================================
  287. */
  288. if ( !isset( $_user['user_id']) || !$is_course_member )
  289. {
  290. exit( );
  291. }
  292. if ($_GET['mailing']) // RH: Mailing detail window call
  293. getUserOwningThisMailing($_GET['mailing'], $_user['user_id'], '500'); // RH or die
  294. /*
  295. ==============================================================================
  296. SANITY CHECKS OF GET DATA & FILE
  297. ==============================================================================
  298. */
  299. if ( ! isset( $_GET['id']) || ! is_numeric( $_GET['id'])) die(dropbox_lang("generalError")." (code 501)");
  300. $work = new Dropbox_work($_GET['id']);
  301. $path = dropbox_cnf("sysPath") . "/" . $work -> filename; //path to file as stored on server
  302. $file = $work->title;
  303. // check that this file exists and that it doesn't include any special characters
  304. //if ( !is_file( $path) || ! eregi( '^[A-Z0-9_\-][A-Z0-9._\-]*$', $file))
  305. if ( !is_file( $path))
  306. {
  307. die(dropbox_lang("generalError")." (code 504)");
  308. }
  309. /*
  310. ==============================================================================
  311. SEND HEADERS
  312. ==============================================================================
  313. */
  314. require_once(api_get_path(LIBRARY_PATH) . '/document.lib.php');
  315. $mimetype = DocumentManager::file_get_mime_type(TRUE);
  316. $fileparts = explode( '.', $file);
  317. $filepartscount = count( $fileparts);
  318. if ( ( $filepartscount > 1) && isset( $mimetype[$fileparts [$filepartscount - 1]]))
  319. {
  320. // give hint to browser about filetype
  321. header( "Content-type: " . $mimetype[$fileparts [$filepartscount - 1]] . "\n");
  322. }
  323. else
  324. {
  325. //no information about filetype: force a download dialog window in browser
  326. header( "Content-type: application/octet-stream\n");
  327. }
  328. if (!in_array(strtolower($fileparts [$filepartscount - 1]), array('doc','xls','ppt','pps','sxw','sxc','sxi')))
  329. {
  330. header('Content-Disposition: inline; filename='.$file); // bugs with open office
  331. }
  332. else
  333. {
  334. header('Content-Disposition: attachment; filename='.$file);
  335. }
  336. /**
  337. * Note that if you use these two headers from a previous example:
  338. * header('Cache-Control: no-cache, must-revalidate');
  339. * header('Pragma: no-cache');
  340. * before sending a file to the browser, the "Open" option on Internet Explorer's file download dialog will not work properly. If the user clicks "Open" instead of "Save," the target application will open an empty file, because the downloaded file was not cached. The user will have to save the file to their hard drive in order to use it.
  341. * Make sure to leave these headers out if you'd like your visitors to be able to use IE's "Open" option.
  342. */
  343. header( "Pragma: \n");
  344. header( "Cache-Control: \n");
  345. header( "Cache-Control: public\n"); // IE cannot download from sessions without a cache
  346. /*if ( isset( $_SERVER["HTTPS"]))
  347. {
  348. /**
  349. * We need to set the following headers to make downloads work using IE in HTTPS mode.
  350. *
  351. //header( "Pragma: ");
  352. //header( "Cache-Control: ");
  353. header( "Expires: Mon, 26 Jul 1997 05:00:00 GMT\n");
  354. header( "Last-Modified: " . gmdate( "D, d M Y H:i:s") . " GMT\n");
  355. header( "Cache-Control: no-store, no-cache, must-revalidate\n"); // HTTP/1.1
  356. header( "Cache-Control: post-check=0, pre-check=0\n", false);
  357. }*/
  358. header( "Content-Description: " . trim( htmlentities( $file)) . "\n");
  359. header( "Content-Transfer-Encoding: binary\n");
  360. header( "Content-Length: " . filesize( $path)."\n" );
  361. /*
  362. ==============================================================================
  363. SEND FILE
  364. ==============================================================================
  365. */
  366. $fp = fopen( $path, "rb");
  367. fpassthru( $fp);
  368. exit( );
  369. /**
  370. * Found a workaround to another headache that just cropped up tonight. Apparently Opera 6.1 on Linux (unsure of other versions/platforms) has problems downloading files using the above methods if you have enabled compression via zlib.output_compression in php.ini.
  371. * It seems that Opera sees that the actual transfer size is less than the size in the "Content-length" header for the download and decides that the transfer was incomplete or corrupted. It then either continuously retries the download or else leaves you with a corrupted file.
  372. * Solution: Make sure your download script/section is off in its own directory. and add the following to your .htaccess file for that directory:
  373. * php_flag zlib.output_compression off
  374. */
  375. ?>