lib/functions.php

   1 <?php
   2 /*
   3  *  Jirafeau, your web file repository
   4  *  Copyright (C) 2008  Julien "axolotl" BERNARD <axolotl@magieeternelle.org>
   5  *  Copyright (C) 2012  Jerome Jutteau <j.jutteau@gmail.com>
   6  *
   7  *  This program is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU Affero General Public License as
   9  *  published by the Free Software Foundation, either version 3 of the
  10  *  License, or (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU Affero General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Affero General Public License
  18  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 /**
  22  * Transform a string in a path by seperating each letters by a '/'.
  23   * @return path finishing with a '/'
  24  */
  25 function
  26 s2p ($s)
  27 {
  28     $p = '';
  29     for ($i = 0; $i < strlen ($s); $i++)
  30         $p .= $s{$i} . '/';
  31     return $p;
  32 }
  33
  34 /**
  35  * Convert base 16 to base 64
  36  * @returns A string based on 64 characters (0-9, a-z, A-Z, "-" and "_")
  37  */
  38 function
  39 base_16_to_64 ($num)
  40 {
  41     $m = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_';
  42     $hex2bin = array ('0000', # 0
  43                       '0001', # 1
  44                       '0010', # 2
  45                       '0011', # 3
  46                       '0100', # 4
  47                       '0101', # 5
  48                       '0110', # 6
  49                       '0111', # 7
  50                       '1000', # 8
  51                       '1001', # 9
  52                       '1010', # a
  53                       '1011', # b
  54                       '1100', # c
  55                       '1101', # d
  56                       '1110', # e
  57                       '1111'); # f
  58     $o = '';
  59     $b = '';
  60     $i = 0;
  61     # Convert long hex string to bin.
  62     $size = strlen ($num);
  63
  64     $b .= $hex2bin{hexdec ($num{$i})};
  65     # Convert long bin to base 64.
  66     $size *= 4;
  67     for ($i = $size - 6; $i >= 0; $i -= 6)
  68         $o = $m{bindec (substr ($b, $i, 6))} . $o;
  69     # Some few bits remaining ?
  70     if ($i < 0 && $i > -6)
  71         $o = $m{bindec (substr ($b, 0, $i + 6))} . $o;
  72     return $o;
  73 }
  74
  75 /**
  76   * Generate a random code.
  77   * @param $l code length
  78   * @return  random code.
  79   */
  80 function
  81 jirafeau_gen_random ($l)
  82 {
  83     if ($l <= 0)
  84         return 42;
  85
  86     $code="";
  87     for ($i = 0; $i < $l; $i++)
  88         $code .= dechex (rand (0, 15));
  89
  90     return $code;
  91 }
  92
  93 function
  94 jirafeau_human_size ($octets)
  95 {
  96     $u = array ('B', 'KB', 'MB', 'GB', 'TB');
  97     $o = max ($octets, 0);
  98     $p = min (floor (($o ? log ($o) : 0) / log (1024)), count ($u) - 1);
  99     $o /= pow (1024, $p);
 100     return round ($o, 1) . $u[$p];
 101 }
 102
 103 function
 104 jirafeau_clean_rm_link ($link)
 105 {
 106     $p = s2p ("$link");
 107     if (file_exists (VAR_LINKS . $p . $link))
 108         unlink (VAR_LINKS . $p . $link);
 109     $parse = VAR_LINKS . $p;
 110     $scan = array();
 111     while (file_exists ($parse)
 112            && ($scan = scandir ($parse))
 113            && count ($scan) == 2 // '.' and '..' folders => empty.
 114            && basename ($parse) != basename (VAR_LINKS))
 115     {
 116         rmdir ($parse);
 117         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 118     }
 119 }
 120
 121 function
 122 jirafeau_clean_rm_file ($md5)
 123 {
 124     $p = s2p ("$md5");
 125     if (file_exists (VAR_FILES . $p . $md5))
 126         unlink (VAR_FILES . $p . $md5);
 127     if (file_exists (VAR_FILES . $p . $md5 . '_count'))
 128         unlink (VAR_FILES . $p . $md5 . '_count');
 129     $parse = VAR_FILES . $p;
 130     $scan = array();
 131     while (file_exists ($parse)
 132            && ($scan = scandir ($parse))
 133            && count ($scan) == 2 // '.' and '..' folders => empty.
 134            && basename ($parse) != basename (VAR_FILES))
 135     {
 136         rmdir ($parse);
 137         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 138     }
 139 }
 140
 141 /**
 142  * transforms a php.ini string representing a value in an integer
 143  * @param $value the value from php.ini
 144  * @returns an integer for this value
 145  */
 146 function jirafeau_ini_to_bytes ($value)
 147 {
 148     $modifier = substr ($value, -1);
 149     $bytes = substr ($value, 0, -1);
 150     switch (strtoupper ($modifier))
 151     {
 152     case 'P':
 153         $bytes *= 1024;
 154     case 'T':
 155         $bytes *= 1024;
 156     case 'G':
 157         $bytes *= 1024;
 158     case 'M':
 159         $bytes *= 1024;
 160     case 'K':
 161         $bytes *= 1024;
 162     default:
 163         break;
 164     }
 165     return $bytes;
 166 }
 167
 168 /**
 169  * gets the maximum upload size according to php.ini
 170  * @returns the maximum upload size in bytes
 171  */
 172 function
 173 jirafeau_get_max_upload_size_bytes ()
 174 {
 175     return min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
 176                 jirafeau_ini_to_bytes (ini_get ('upload_max_filesize')));
 177 }
 178
 179 /**
 180  * gets the maximum upload size according to php.ini
 181  * @returns the maximum upload size string
 182  */
 183 function
 184 jirafeau_get_max_upload_size ()
 185 {
 186     return jirafeau_human_size(
 187             min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
 188                  jirafeau_ini_to_bytes (ini_get ('upload_max_filesize'))));
 189 }
 190
 191 /**
 192  * gets a string explaining the error
 193  * @param $code the error code
 194  * @returns a string explaining the error
 195  */
 196 function
 197 jirafeau_upload_errstr ($code)
 198 {
 199     switch ($code)
 200     {
 201     case UPLOAD_ERR_INI_SIZE:
 202     case UPLOAD_ERR_FORM_SIZE:
 203         return t('Your file exceeds the maximum authorized file size. ');
 204         break;
 205
 206     case UPLOAD_ERR_PARTIAL:
 207     case UPLOAD_ERR_NO_FILE:
 208         return
 209             t
 210             ('Your file was not uploaded correctly. You may succeed in retrying. ');
 211         break;
 212
 213     case UPLOAD_ERR_NO_TMP_DIR:
 214     case UPLOAD_ERR_CANT_WRITE:
 215     case UPLOAD_ERR_EXTENSION:
 216         return t('Internal error. You may not succeed in retrying. ');
 217         break;
 218
 219     default:
 220         break;
 221     }
 222     return t('Unknown error. ');
 223 }
 224
 225 /** Remove link and it's file
 226  * @param $link the link's name (hash)
 227  */
 228
 229 function
 230 jirafeau_delete_link ($link)
 231 {
 232     $l = jirafeau_get_link ($link);
 233     if (!count ($l))
 234         return;
 235
 236     jirafeau_clean_rm_link ($link);
 237
 238     $md5 = $l['md5'];
 239     $p = s2p ("$md5");
 240
 241     $counter = 1;
 242     if (file_exists (VAR_FILES . $p . $md5. '_count'))
 243     {
 244         $content = file (VAR_FILES . $p . $md5. '_count');
 245         $counter = trim ($content[0]);
 246     }
 247     $counter--;
 248
 249     if ($counter >= 1)
 250     {
 251         $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 252         fwrite ($handle, $counter);
 253         fclose ($handle);
 254     }
 255
 256     if ($counter == 0)
 257         jirafeau_clean_rm_file ($md5);
 258 }
 259
 260 /**
 261  * Delete a file and it's links.
 262  */
 263 function
 264 jirafeau_delete_file ($md5)
 265 {
 266     $count = 0;
 267     /* Get all links files. */
 268     $stack = array (VAR_LINKS);
 269     while (($d = array_shift ($stack)) && $d != NULL)
 270     {
 271         $dir = scandir ($d);
 272
 273         foreach ($dir as $node)
 274         {
 275             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 276                 preg_match ('/\.tmp/i', "$node"))
 277                 continue;
 278
 279             if (is_dir ($d . $node))
 280             {
 281                 /* Push new found directory. */
 282                 $stack[] = $d . $node . '/';
 283             }
 284             elseif (is_file ($d . $node))
 285             {
 286                 /* Read link informations. */
 287                 $l = jirafeau_get_link (basename ($node));
 288                 if (!count ($l))
 289                     continue;
 290                 if ($l['md5'] == $md5)
 291                 {
 292                     $count++;
 293                     jirafeau_delete_link ($node);
 294                 }
 295             }
 296         }
 297     }
 298     jirafeau_clean_rm_file ($md5);
 299     return $count;
 300 }
 301
 302 /**
 303  * handles an uploaded file
 304  * @param $file the file struct given by $_FILE[]
 305  * @param $one_time_download is the file a one time download ?
 306  * @param $key if not empty, protect the file with this key
 307  * @param $time the time of validity of the file
 308  * @param $ip uploader's ip
 309  * @returns an array containing some information
 310  *   'error' => information on possible errors
 311  *   'link' => the link name of the uploaded file
 312  *   'delete_link' => the link code to delete file
 313  */
 314 function
 315 jirafeau_upload ($file, $one_time_download, $key, $time, $ip)
 316 {
 317     if (empty ($file['tmp_name']) || !is_uploaded_file ($file['tmp_name']))
 318     {
 319         return (array(
 320                  'error' =>
 321                    array ('has_error' => true,
 322                           'why' => jirafeau_upload_errstr ($file['error'])),
 323                  'link' => '',
 324                  'delete_link' => ''));
 325     }
 326
 327     /* array representing no error */
 328     $noerr = array ('has_error' => false, 'why' => '');
 329
 330     /* file informations */
 331     $md5 = md5_file ($file['tmp_name']);
 332     $name = str_replace (NL, '', trim ($file['name']));
 333     $mime_type = $file['type'];
 334     $size = $file['size'];
 335
 336     /* does file already exist ? */
 337     $rc = false;
 338     $p = s2p ("$md5");
 339     if (file_exists (VAR_FILES . $p .  $md5))
 340     {
 341         $rc = unlink ($file['tmp_name']);
 342     }
 343     elseif ((file_exists (VAR_FILES . $p) || @mkdir (VAR_FILES . $p, 0755, true))
 344             && move_uploaded_file ($file['tmp_name'], VAR_FILES . $p . $md5))
 345     {
 346         $rc = true;
 347     }
 348     if (!$rc)
 349     {
 350         return (array(
 351                  'error' =>
 352                    array ('has_error' => true,
 353                           'why' => t('Internal error during file creation.')),
 354                  'link' =>'',
 355                  'delete_link' => ''));
 356     }
 357
 358     /* Increment or create count file. */
 359     $counter = 0;
 360     if (file_exists (VAR_FILES . $p . $md5 . '_count'))
 361     {
 362         $content = file (VAR_FILES . $p . $md5. '_count');
 363         $counter = trim ($content[0]);
 364     }
 365     $counter++;
 366     $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 367     fwrite ($handle, $counter);
 368     fclose ($handle);
 369
 370     /* Create delete code. */
 371     $delete_link_code = jirafeau_gen_random (8);
 372
 373     /* md5 password or empty */
 374     $password = '';
 375     if (!empty ($key))
 376         $password = md5 ($key);
 377
 378     /* create link file */
 379     $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
 380     $handle = fopen ($link_tmp_name, 'w');
 381     fwrite ($handle,
 382             $name . NL. $mime_type . NL. $size . NL. $password . NL. $time .
 383             NL . $md5. NL . ($one_time_download ? 'O' : 'R') . NL . date ('U') .
 384             NL . $ip . NL. $delete_link_code . NL);
 385     fclose ($handle);
 386     $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
 387     $l = s2p ("$md5_link");
 388     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
 389         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
 390     {
 391         if (file_exists ($link_tmp_name))
 392             unlink ($link_tmp_name);
 393
 394         $counter--;
 395         if ($counter >= 1)
 396         {
 397             $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 398             fwrite ($handle, $counter);
 399             fclose ($handle);
 400         }
 401         else
 402         {
 403             jirafeau_clean_rm_file ($md5_link);
 404         }
 405         return (array(
 406                  'error' =>
 407                    array ('has_error' => true,
 408                           'why' => t('Internal error during file creation. ')),
 409                  'link' =>'',
 410                  'delete_link' => ''));
 411     }
 412    return (array ('error' => $noerr,
 413                   'link' => $md5_link,
 414                   'delete_link' => $delete_link_code));
 415 }
 416
 417 /**
 418  * tells if a mime-type is viewable in a browser
 419  * @param $mime the mime type
 420  * @returns a boolean telling if a mime type is viewable
 421  */
 422 function
 423 jirafeau_is_viewable ($mime)
 424 {
 425     if (!empty ($mime))
 426     {
 427         /* Actually, verify if mime-type is an image or a text. */
 428         $viewable = array ('image', 'text');
 429         $decomposed = explode ('/', $mime);
 430         return in_array ($decomposed[0], $viewable);
 431     }
 432     return false;
 433 }
 434
 435 // Error handling functions.
 436 //! Global array that contains all registered errors.
 437 $error_list = array ();
 438
 439 /**
 440  * Adds an error to the list of errors.
 441  * @param $title the error's title
 442  * @param $description is a human-friendly description of the problem.
 443  */
 444 function
 445 add_error ($title, $description)
 446 {
 447     global $error_list;
 448     $error_list[] = '<p>' . $title. '<br />' . $description. '</p>';
 449 }
 450
 451 /**
 452  * Informs whether any error has been registered yet.
 453  * @return true if there are errors.
 454  */
 455 function
 456 has_error ()
 457 {
 458     global $error_list;
 459     return !empty ($error_list);
 460 }
 461
 462 /**
 463  * Displays all the errors.
 464  */
 465 function
 466 show_errors ()
 467 {
 468     if (has_error ())
 469     {
 470         global $error_list;
 471         echo '<div class="error">';
 472         foreach ($error_list as $error)
 473         {
 474             echo $error;
 475         }
 476         echo '</div>';
 477     }
 478 }
 479
 480 function check_errors ()
 481 {
 482     if (file_exists (JIRAFEAU_ROOT . 'install.php')
 483         && !file_exists (JIRAFEAU_ROOT . 'lib/config.local.php'))
 484     {
 485         header('Location: install.php');
 486         exit;
 487     }
 488
 489     /* check if the destination dirs are writable */
 490     $writable = is_writable (VAR_FILES) && is_writable (VAR_LINKS);
 491
 492     /* Checking for errors. */
 493     if (!is_writable (VAR_FILES))
 494         add_error (t('The file directory is not writable!'), VAR_FILES);
 495
 496     if (!is_writable (VAR_LINKS))
 497         add_error (t('The link directory is not writable!'), VAR_LINKS);
 498
 499     if (!is_writable (VAR_ASYNC))
 500         add_error (t('The async directory is not writable!'), VAR_ASYNC);
 501
 502      if (!is_writable (VAR_BLOCK))
 503         add_error (t('The block directory is not writable!'), VAR_BLOCK);
 504
 505    /* Check if the install.php script is still in the directory. */
 506     if (file_exists (JIRAFEAU_ROOT . 'install.php'))
 507         add_error (t('Installer script still present'),
 508              t('Please make sure to delete the installer script ' .
 509                '"install.php" before continuing.'));
 510 }
 511
 512 /**
 513  * Read link informations
 514  * @return array containing informations.
 515  */
 516 function
 517 jirafeau_get_link ($hash)
 518 {
 519     $out = array ();
 520     $link = VAR_LINKS . s2p ("$hash") . $hash;
 521
 522     if (!file_exists ($link))
 523         return $out;
 524
 525     $c = file ($link);
 526     $out['file_name'] = trim ($c[0]);
 527     $out['mime_type'] = trim ($c[1]);
 528     $out['file_size'] = trim ($c[2]);
 529     $out['key'] = trim ($c[3], NL);
 530     $out['time'] = trim ($c[4]);
 531     $out['md5'] = trim ($c[5]);
 532     $out['onetime'] = trim ($c[6]);
 533     $out['upload_date'] = trim ($c[7]);
 534     $out['ip'] = trim ($c[8]);
 535     $out['link_code'] = trim ($c[9]);
 536
 537     return $out;
 538 }
 539
 540 /**
 541  * List files in admin interface.
 542  */
 543 function
 544 jirafeau_admin_list ($name, $file_hash, $link_hash)
 545 {
 546     echo '<fieldset><legend>';
 547     if (!empty ($name))
 548         echo t('Filename') . ": $name ";
 549     if (!empty ($file_hash))
 550         echo t('file') . ": $file_hash ";
 551     if (!empty ($link_hash))
 552         echo t('link') . ": $link_hash ";
 553     if (empty ($name) && empty ($file_hash) && empty ($link_hash))
 554         echo t('List all files');
 555     echo '</legend>';
 556     echo '<table>';
 557     echo '<tr>';
 558     echo '<td>' . t('Filename') . '</td>';
 559     echo '<td>' . t('Type') . '</td>';
 560     echo '<td>' . t('Size') . '</td>';
 561     echo '<td>' . t('Expire') . '</td>';
 562     echo '<td>' . t('Onetime') . '</td>';
 563     echo '<td>' . t('Upload date') . '</td>';
 564     echo '<td>' . t('Origin') . '</td>';
 565     echo '<td>' . t('Action') . '</td>';
 566     echo '</tr>';
 567
 568     /* Get all links files. */
 569     $stack = array (VAR_LINKS);
 570     while (($d = array_shift ($stack)) && $d != NULL)
 571     {
 572         $dir = scandir ($d);
 573         foreach ($dir as $node)
 574         {
 575             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 576                 preg_match ('/\.tmp/i', "$node"))
 577                 continue;
 578             if (is_dir ($d . $node))
 579             {
 580                 /* Push new found directory. */
 581                 $stack[] = $d . $node . '/';
 582             }
 583             elseif (is_file ($d . $node))
 584             {
 585                 /* Read link informations. */
 586                 $l = jirafeau_get_link ($node);
 587                 if (!count ($l))
 588                     continue;
 589
 590                 /* Filter. */
 591                 if (!empty ($name) && !preg_match ("/$name/i", $l['file_name']))
 592                     continue;
 593                 if (!empty ($file_hash) && $file_hash != $l['md5'])
 594                     continue;
 595                 if (!empty ($link_hash) && $link_hash != $node)
 596                     continue;
 597                 /* Print link informations. */
 598                 echo '<tr>';
 599                 echo '<td>' .
 600                 '<form action = "admin.php" method = "post">' .
 601                 '<input type = "hidden" name = "action" value = "download"/>' .
 602                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 603                 '<input type = "submit" value = "' . $l['file_name'] . '" />' .
 604                 '</form>';
 605                 echo '</td>';
 606                 echo '<td>' . $l['mime_type'] . '</td>';
 607                 echo '<td>' . jirafeau_human_size ($l['file_size']) . '</td>';
 608                 echo '<td>' . ($l['time'] == -1 ? '' : strftime ('%c', $l['time'])) .
 609                      '</td>';
 610                 echo '<td>' . $l['onetime'] . '</td>';
 611                 echo '<td>' . strftime ('%c', $l['upload_date']) . '</td>';
 612                 echo '<td>' . $l['ip'] . '</td>';
 613                 echo '<td>' .
 614                 '<form action = "admin.php" method = "post">' .
 615                 '<input type = "hidden" name = "action" value = "delete_link"/>' .
 616                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 617                 '<input type = "submit" value = "' . t('Del link') . '" />' .
 618                 '</form>' .
 619                 '<form action = "admin.php" method = "post">' .
 620                 '<input type = "hidden" name = "action" value = "delete_file"/>' .
 621                 '<input type = "hidden" name = "md5" value = "' . $l['md5'] . '"/>' .
 622                 '<input type = "submit" value = "' . t('Del file and links') . '" />' .
 623                 '</form>' .
 624                 '</td>';
 625                 echo '</tr>';
 626             }
 627         }
 628     }
 629     echo '</table></fieldset>';
 630 }
 631
 632 /**
 633  * Clean expired files.
 634  * @return number of cleaned files.
 635  */
 636 function
 637 jirafeau_admin_clean ()
 638 {
 639     $count = 0;
 640     /* Get all links files. */
 641     $stack = array (VAR_LINKS);
 642     while (($d = array_shift ($stack)) && $d != NULL)
 643     {
 644         $dir = scandir ($d);
 645
 646         foreach ($dir as $node)
 647         {
 648             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 649                 preg_match ('/\.tmp/i', "$node"))
 650                 continue;
 651
 652             if (is_dir ($d . $node))
 653             {
 654                 /* Push new found directory. */
 655                 $stack[] = $d . $node . '/';
 656             }
 657             elseif (is_file ($d . $node))
 658             {
 659                 /* Read link informations. */
 660                 $l = jirafeau_get_link (basename ($node));
 661                 if (!count ($l))
 662                     continue;
 663                 $p = s2p ($l['md5']);
 664                 if ($l['time'] > 0 && $l['time'] < time () || // expired
 665                     !file_exists (VAR_FILES . $p . $l['md5']) || // invalid
 666                     !file_exists (VAR_FILES . $p . $l['md5'] . '_count')) // invalid
 667                 {
 668                     jirafeau_delete_link ($node);
 669                     $count++;
 670                 }
 671             }
 672         }
 673     }
 674     return $count;
 675 }
 676
 677
 678 /**
 679  * Clean old async transferts.
 680  * @return number of cleaned files.
 681  */
 682 function
 683 jirafeau_admin_clean_async ()
 684 {
 685     $count = 0;
 686     /* Get all links files. */
 687     $stack = array (VAR_ASYNC);
 688     while (($d = array_shift ($stack)) && $d != NULL)
 689     {
 690         $dir = scandir ($d);
 691
 692         foreach ($dir as $node)
 693         {
 694             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 695                 preg_match ('/\.tmp/i', "$node"))
 696                 continue;
 697
 698             if (is_dir ($d . $node))
 699             {
 700                 /* Push new found directory. */
 701                 $stack[] = $d . $node . '/';
 702             }
 703             elseif (is_file ($d . $node))
 704             {
 705                 /* Read async informations. */
 706                 $a = jirafeau_get_async_ref (basename ($node));
 707                 if (!count ($a))
 708                     continue;
 709                 /* Delete transferts older than 1 hour. */
 710                 if (date ('U') - $a['last_edited'] > 3600)
 711                 {
 712                     jirafeau_async_delete (basename ($node));
 713                     $count++;
 714                 }
 715             }
 716         }
 717     }
 718     return $count;
 719 }
 720 /**
 721  * Read async transfert informations
 722  * @return array containing informations.
 723  */
 724 function
 725 jirafeau_get_async_ref ($ref)
 726 {
 727     $out = array ();
 728     $refinfos = VAR_ASYNC . s2p ("$ref") . "$ref";
 729
 730     if (!file_exists ($refinfos))
 731         return $out;
 732
 733     $c = file ($refinfos);
 734     $out['file_name'] = trim ($c[0]);
 735     $out['mime_type'] = trim ($c[1]);
 736     $out['key'] = trim ($c[2], NL);
 737     $out['time'] = trim ($c[3]);
 738     $out['onetime'] = trim ($c[4]);
 739     $out['ip'] = trim ($c[5]);
 740     $out['last_edited'] = trim ($c[6]);
 741     $out['next_code'] = trim ($c[7]);
 742     return $out;
 743 }
 744
 745 /**
 746  * Delete async transfert informations
 747   */
 748 function
 749 jirafeau_async_delete ($ref)
 750 {
 751     $p = s2p ("$ref");
 752     if (file_exists (VAR_ASYNC . $p . $ref))
 753         unlink (VAR_ASYNC . $p . $ref);
 754     if (file_exists (VAR_ASYNC . $p . $ref . '_data'))
 755         unlink (VAR_ASYNC . $p . $ref . '_data');
 756     $parse = VAR_ASYNC . $p;
 757     $scan = array();
 758     while (file_exists ($parse)
 759            && ($scan = scandir ($parse))
 760            && count ($scan) == 2 // '.' and '..' folders => empty.
 761            && basename ($parse) != basename (VAR_ASYNC))
 762     {
 763         rmdir ($parse);
 764         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 765     }
 766 }
 767
 768 /**
 769   * Init a new asynchronous upload.
 770   * @param $finename Name of the file to send
 771   * @param $one_time One time upload parameter
 772   * @param $key eventual password (or blank)
 773   * @param $time time limit
 774   * @param $ip ip address of the client
 775   * @return  a string containing a temporary reference followed by a code or the string "Error"
 776   */
 777 function
 778 jirafeau_async_init ($filename, $type, $one_time, $key, $time, $ip)
 779 {
 780     $res = 'Error';
 781
 782     /* Create temporary folder. */
 783     $ref;
 784     $p;
 785     $code = jirafeau_gen_random (4);
 786     do
 787     {
 788         $ref = jirafeau_gen_random (32);
 789         $p = VAR_ASYNC . s2p ($ref);
 790     } while (file_exists ($p));
 791     @mkdir ($p, 0755, true);
 792     if (!file_exists ($p))
 793     {
 794         echo "Error";
 795         return;
 796     }
 797
 798     /* md5 password or empty */
 799     $password = '';
 800     if (!empty ($key))
 801         $password = md5 ($key);
 802
 803     /* Store informations. */
 804     $p .= $ref;
 805     $handle = fopen ($p, 'w');
 806     fwrite ($handle,
 807             str_replace (NL, '', trim ($filename)) . NL .
 808             str_replace (NL, '', trim ($type)) . NL . $password . NL .
 809             $time . NL . ($one_time ? 'O' : 'R') . NL . $ip . NL .
 810             date ('U') . NL . $code . NL);
 811     fclose ($handle);
 812
 813     return $ref . NL . $code ;
 814 }
 815
 816 /**
 817   * Append a piece of file on the asynchronous upload.
 818   * @param $ref asynchronous upload reference
 819   * @param $file piece of data
 820   * @param $code client code for this operation
 821   * @return  a string containing a next code to use or the string "Error"
 822   */
 823 function
 824 jirafeau_async_push ($ref, $data, $code)
 825 {
 826     /* Get async infos. */
 827     $a = jirafeau_get_async_ref ($ref);
 828
 829     /* Check some errors. */
 830     if (count ($a) == 0
 831         || $a['next_code'] != "$code"
 832         || empty ($data['tmp_name'])
 833         || !is_uploaded_file ($data['tmp_name']))
 834         return "Error";
 835
 836     $p = s2p ($ref);
 837
 838     /* Concatenate data. */
 839     $r = fopen ($data['tmp_name'], 'r');
 840     $w = fopen (VAR_ASYNC . $p . $ref . '_data', 'a');
 841     while (!feof ($r))
 842     {
 843         if (fwrite ($w, fread ($r, 1024)) === false)
 844         {
 845             fclose ($r);
 846             fclose ($w);
 847             jirafeau_async_delete ($ref);
 848             return "Error";
 849         }
 850     }
 851     fclose ($r);
 852     fclose ($w);
 853     unlink ($data['tmp_name']);
 854
 855     /* Update async file. */
 856     $code = jirafeau_gen_random (4);
 857     $handle = fopen (VAR_ASYNC . $p . $ref, 'w');
 858     fwrite ($handle,
 859             $a['file_name'] . NL. $a['mime_type'] . NL. $a['key'] . NL .
 860             $a['time'] . NL . $a['onetime'] . NL . $a['ip'] . NL .
 861             date ('U') . NL . $code . NL);
 862     fclose ($handle);
 863     return $code;
 864 }
 865
 866 /**
 867   * Finalyze an asynchronous upload.
 868   * @param $ref asynchronous upload reference
 869   * @param $code client code for this operation
 870   * @return  a string containing the download reference followed by a delete code or the string "Error"
 871   */
 872 function
 873 jirafeau_async_end ($ref, $code)
 874 {
 875     /* Get async infos. */
 876     $a = jirafeau_get_async_ref ($ref);
 877     if (count ($a) == 0
 878         || $a['next_code'] != "$code")
 879         return "Error";
 880
 881     /* Generate link infos. */
 882     $p = VAR_ASYNC . s2p ($ref) . $ref . "_data";
 883     if (!file_exists($p))
 884         return "Error";
 885     $md5 = md5_file ($p);
 886     $size = filesize($p);
 887     $np = s2p ($md5);
 888     $delete_link_code = jirafeau_gen_random (8);
 889
 890     /* File already exist ? */
 891     if (!file_exists (VAR_FILES . $np))
 892         @mkdir (VAR_FILES . $np, 0755, true);
 893     if (!file_exists (VAR_FILES . $np . $md5))
 894         rename ($p, VAR_FILES . $np . $md5);
 895
 896     /* Increment or create count file. */
 897     $counter = 0;
 898     if (file_exists (VAR_FILES . $np . $md5 . '_count'))
 899     {
 900         $content = file (VAR_FILES . $np . $md5. '_count');
 901         $counter = trim ($content[0]);
 902     }
 903     $counter++;
 904     $handle = fopen (VAR_FILES . $np . $md5. '_count', 'w');
 905     fwrite ($handle, $counter);
 906     fclose ($handle);
 907
 908     /* Create link. */
 909     $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
 910     $handle = fopen ($link_tmp_name, 'w');
 911     fwrite ($handle,
 912             $a['file_name'] . NL . $a['mime_type'] . NL . $size . NL .
 913             $a['key'] . NL . $a['time'] . NL . $md5 . NL . $a['onetime'] . NL .
 914             date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL);
 915     fclose ($handle);
 916     $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
 917     $l = s2p ("$md5_link");
 918     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
 919         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
 920         echo "Error";
 921
 922     /* Clean async upload. */
 923     jirafeau_async_delete ($ref);
 924     return $md5_link . NL . $delete_link_code;
 925 }
 926
 927 /**
 928   * Delete a block.
 929   * @param $id identifier of the block.
 930   */
 931 function
 932 jirafeau_block_delete_ ($id)
 933 {
 934     $p = VAR_BLOCK . s2p ($id);
 935     if (!file_exists ($p))
 936         return;
 937
 938     if (file_exists ($p . $id))
 939         unlink ($p . $id);
 940     if (file_exists ($p . $id . '_infos'))
 941         unlink ($p . $id . '_infos');
 942     $parse = $p;
 943     $scan = array();
 944     while (file_exists ($parse)
 945            && ($scan = scandir ($parse))
 946            && count ($scan) == 2 // '.' and '..' folders => empty.
 947            && basename ($parse) != basename (VAR_BLOCK))
 948     {
 949         rmdir ($parse);
 950         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 951     }
 952 }
 953
 954 /**
 955   * Create a file filled with zeros.
 956   * @param $size size of the file.
 957   * @return  a string corresponding to an id or the string "Error"
 958   */
 959 function
 960 jirafeau_block_init ($size)
 961 {
 962     if (!ctype_digit ($size) || $size <= 0)
 963         return "Error";
 964
 965     /* Create folder. */
 966     $id;
 967     do
 968     {
 969         $id = jirafeau_gen_random (32);
 970         $p = VAR_BLOCK . s2p ($id);
 971     } while (file_exists ($p));
 972     @mkdir ($p, 0755, true);
 973     if (!file_exists ($p))
 974     {
 975         echo "Error";
 976         return;
 977     }
 978
 979     /* Create block. */
 980     $p .= $id;
 981     $h = fopen ($p, 'w');
 982     $fill = str_repeat ("\0", 1024);
 983     for ($cnt = 0; $cnt < $size; $cnt += 1024)
 984     {
 985         if ($size - $cnt < 1024)
 986             $fill = str_repeat ("\0", $size - $cnt);
 987         if (fwrite ($h, $fill) === false)
 988         {
 989             fclose ($h);
 990             jirafeau_block_delete_ ($id);
 991             return "Error";
 992         }
 993     }
 994     fclose ($h);
 995
 996     /* Generate a write/delete code. */
 997     $code = jirafeau_gen_random (12);
 998
 999     /* Add block infos. */
1000     if (file_put_contents ($p . '_infos', date ('U') . NL . $size . NL . $code) === FALSE)
1001     {
1002         jirafeau_block_delete_ ($id);
1003         return "Error";
1004     }
1005
1006     return $id . NL . $code;
1007 }
1008
1009 /**
1010   * Read some data in a block.
1011   * @param $id identifier of the block
1012   * @param $start where to read data (starting from zero).
1013   * @param $length length to read.
1014   * @return  echo data
1015   */
1016 function
1017 jirafeau_block_read ($id, $start, $length)
1018 {
1019     if (!ctype_digit ($start) || $start < 0
1020         || !ctype_digit ($length) || $length <= 0)
1021     {
1022         echo "Error";
1023         return;
1024     }
1025
1026     $p = VAR_BLOCK . s2p ($id) . $id;
1027     if (!file_exists ($p))
1028     {
1029         echo "Error";
1030         return;
1031     }
1032
1033     /* Check date. */
1034     $f = file ($p . '_infos');
1035     $date = trim ($f[0]);
1036     $block_size = trim ($f[1]);
1037     $stored_code = trim ($f[2]);
1038     /* Update date. */
1039     if (date ('U') - $date > JIRAFEAU_HOUR
1040         && date ('U') - $date < JIRAFEAU_MONTH)
1041     {
1042         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1043         {
1044             jirafeau_block_delete_ ($id);
1045             echo "Error";
1046             return;
1047         }
1048     }
1049     /* Remove data. */
1050     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1051     {
1052         echo date ('U'). " $date ";
1053         jirafeau_block_delete_ ($id);
1054         echo "Error";
1055         return;
1056     }
1057
1058     if ($start + $length > $block_size)
1059     {
1060         echo "Error";
1061         return;
1062     }
1063
1064     /* Read content. */
1065     header ('Content-Length: ' . $length);
1066     header ('Content-Disposition: attachment');
1067
1068     $r = fopen ($p, 'r');
1069     if (fseek ($r, $start) != 0)
1070     {
1071         echo "Error";
1072         return;
1073     }
1074     $c = 1024;
1075     for ($cnt = 0; $cnt < $length && !feof ($r); $cnt += 1024)
1076     {
1077         if ($length - $cnt < 1024)
1078             $c = $length - $cnt;
1079         print fread ($r, $c);
1080         ob_flush();
1081     }
1082     fclose ($r);
1083 }
1084
1085 /**
1086   * Write some data in a block.
1087   * @param $id identifier of the block
1088   * @param $start where to writing data (starting from zero).
1089   * @param $data data to write.
1090   * @param $code code to allow writing.
1091   * @return  string "Ok" or string "Error".
1092   */
1093 function
1094 jirafeau_block_write ($id, $start, $data, $code)
1095 {
1096     if (!ctype_digit ($start) || $start < 0
1097         || strlen ($code) == 0)
1098         return "Error";
1099
1100     $p = VAR_BLOCK . s2p ($id) . $id;
1101     if (!file_exists ($p))
1102         return "Error";
1103
1104     /* Check date. */
1105     $f = file ($p . '_infos');
1106     $date = trim ($f[0]);
1107     $block_size = trim ($f[1]);
1108     $stored_code = trim ($f[2]);
1109     /* Update date. */
1110     if (date ('U') - $date > JIRAFEAU_HOUR
1111         && date ('U') - $date < JIRAFEAU_MONTH)
1112     {
1113         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1114         {
1115             jirafeau_block_delete_ ($id);
1116             return "Error";
1117         }
1118     }
1119     /* Remove data. */
1120     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1121     {
1122         jirafeau_block_delete_ ($id);
1123         return "Error";
1124     }
1125
1126     /* Check code. */
1127     if ($stored_code != $code)
1128     {
1129         echo "Error";
1130         return;
1131     }
1132
1133     /* Check data. */
1134     $size = $data['size'];
1135     if ($size <= 0)
1136         return "Error";
1137     if ($start + $size > $block_size)
1138         return "Error";
1139
1140     /* Open data. */
1141     $r = fopen ($data['tmp_name'], 'r');
1142
1143     /* Open Block. */
1144     $w = fopen ($p, 'r+');
1145     if (fseek ($w, $start) != 0)
1146         return "Error";
1147
1148     /* Write content. */
1149     $c = 1024;
1150     for ($cnt = 0; $cnt <= $size && !feof ($w); $cnt += 1024)
1151     {
1152         if ($size - $cnt < 1024)
1153             $c = $size - $cnt;
1154         $d = fread ($r, $c);
1155         fwrite ($w, $d);
1156     }
1157     fclose ($r);
1158     fclose ($w);
1159     unlink ($data['tmp_name']);
1160     return "Ok";
1161 }
1162
1163 /**
1164   * Delete a block.
1165   * @param $id identifier of the block.
1166   * @param $code code to allow writing.
1167   * @return  string "Ok" or string "Error".
1168   */
1169 function
1170 jirafeau_block_delete ($id, $code)
1171 {
1172     $p = VAR_BLOCK . s2p ($id) . $id;
1173
1174     if (!file_exists ($p))
1175         return "Error";
1176
1177     $f = file ($p . '_infos');
1178     $date = trim ($f[0]);
1179     $block_size = trim ($f[1]);
1180     $stored_code = trim ($f[2]);
1181
1182     if ($code != $stored_code)
1183         return "Error";
1184
1185     jirafeau_block_delete_ ($id);
1186     return "Ok";
1187 }
1188
1189 /**
1190  * Clean old unused blocks.
1191  * @return number of cleaned blocks.
1192  */
1193 function
1194 jirafeau_admin_clean_block ()
1195 {
1196     $count = 0;
1197     /* Get all blocks. */
1198     $stack = array (VAR_BLOCK);
1199     while (($d = array_shift ($stack)) && $d != NULL)
1200     {
1201         $dir = scandir ($d);
1202
1203         foreach ($dir as $node)
1204         {
1205             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0)
1206                 continue;
1207
1208             if (is_dir ($d . $node))
1209             {
1210                 /* Push new found directory. */
1211                 $stack[] = $d . $node . '/';
1212             }
1213             elseif (is_file ($d . $node) && preg_match ('/\_infos/i', "$node"))
1214             {
1215                 /* Read block informations. */
1216                 $f = file ($d . $node);
1217                 $date = trim ($f[0]);
1218                 $block_size = trim ($f[1]);
1219                 if (date ('U') - $date >= JIRAFEAU_MONTH)
1220                 {
1221                     jirafeau_block_delete_ (substr($node, 0, -6));
1222                     $count++;
1223                 }
1224             }
1225         }
1226     }
1227     return $count;
1228 }
1229
1230
1231 ?>