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 = ['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     for ($i = 0; $i < $size; $i++)
  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     $name = trim ($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     $writable = is_writable (VAR_FILES) && is_writable (VAR_LINKS);
 491
 492     /* Checking for errors. */
 493     if (!is_writable (VAR_FILES))
 494         add_error (t('The file directory is not writable!'), VAR_FILES);
 495
 496     if (!is_writable (VAR_LINKS))
 497         add_error (t('The link directory is not writable!'), VAR_LINKS);
 498
 499     if (!is_writable (VAR_ASYNC))
 500         add_error (t('The async directory is not writable!'), VAR_ASYNC);
 501
 502     /* Check if the install.php script is still in the directory. */
 503     if (file_exists (JIRAFEAU_ROOT . 'install.php'))
 504         add_error (t('Installer script still present'),
 505              t('Please make sure to delete the installer script ' .
 506                '"install.php" before continuing.'));
 507 }
 508
 509 /**
 510  * Read link informations
 511  * @return array containing informations.
 512  */
 513 function
 514 jirafeau_get_link ($hash)
 515 {
 516     $out = array ();
 517     $link = VAR_LINKS . s2p ("$hash") . $hash;
 518
 519     if (!file_exists ($link))
 520         return $out;
 521
 522     $c = file ($link);
 523     $out['file_name'] = trim ($c[0]);
 524     $out['mime_type'] = trim ($c[1]);
 525     $out['file_size'] = trim ($c[2]);
 526     $out['key'] = trim ($c[3], NL);
 527     $out['time'] = trim ($c[4]);
 528     $out['md5'] = trim ($c[5]);
 529     $out['onetime'] = trim ($c[6]);
 530     $out['upload_date'] = trim ($c[7]);
 531     $out['ip'] = trim ($c[8]);
 532     $out['link_code'] = trim ($c[9]);
 533
 534     return $out;
 535 }
 536
 537 /**
 538  * List files in admin interface.
 539  */
 540 function
 541 jirafeau_admin_list ($name, $file_hash, $link_hash)
 542 {
 543     echo '<fieldset><legend>';
 544     if (!empty ($name))
 545         echo t('Filename') . ": $name ";
 546     if (!empty ($file_hash))
 547         echo t('file') . ": $file_hash ";
 548     if (!empty ($link_hash))
 549         echo t('link') . ": $link_hash ";
 550     if (empty ($name) && empty ($file_hash) && empty ($link_hash))
 551         echo t('List all files');
 552     echo '</legend>';
 553     echo '<table>';
 554     echo '<tr>';
 555     echo '<td>' . t('Filename') . '</td>';
 556     echo '<td>' . t('Type') . '</td>';
 557     echo '<td>' . t('Size') . '</td>';
 558     echo '<td>' . t('Expire') . '</td>';
 559     echo '<td>' . t('Onetime') . '</td>';
 560     echo '<td>' . t('Upload date') . '</td>';
 561     echo '<td>' . t('Origin') . '</td>';
 562     echo '<td>' . t('Action') . '</td>';
 563     echo '</tr>';
 564
 565     /* Get all links files. */
 566     $stack = array (VAR_LINKS);
 567     while (($d = array_shift ($stack)) && $d != NULL)
 568     {
 569         $dir = scandir ($d);
 570         foreach ($dir as $node)
 571         {
 572             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 573                 preg_match ('/\.tmp/i', "$node"))
 574                 continue;
 575             if (is_dir ($d . $node))
 576             {
 577                 /* Push new found directory. */
 578                 $stack[] = $d . $node . '/';
 579             }
 580             elseif (is_file ($d . $node))
 581             {
 582                 /* Read link informations. */
 583                 $l = jirafeau_get_link ($node);
 584                 if (!count ($l))
 585                     continue;
 586
 587                 /* Filter. */
 588                 if (!empty ($name) && !preg_match ("/$name/i", $l['file_name']))
 589                     continue;
 590                 if (!empty ($file_hash) && $file_hash != $l['md5'])
 591                     continue;
 592                 if (!empty ($link_hash) && $link_hash != $node)
 593                     continue;
 594                 /* Print link informations. */
 595                 echo '<tr>';
 596                 echo '<td>' .
 597                 '<form action = "admin.php" method = "post">' .
 598                 '<input type = "hidden" name = "action" value = "download"/>' .
 599                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 600                 '<input type = "submit" value = "' . $l['file_name'] . '" />' .
 601                 '</form>';
 602                 echo '</td>';
 603                 echo '<td>' . $l['mime_type'] . '</td>';
 604                 echo '<td>' . jirafeau_human_size ($l['file_size']) . '</td>';
 605                 echo '<td>' . ($l['time'] == -1 ? '' : strftime ('%c', $l['time'])) .
 606                      '</td>';
 607                 echo '<td>' . $l['onetime'] . '</td>';
 608                 echo '<td>' . strftime ('%c', $l['upload_date']) . '</td>';
 609                 echo '<td>' . $l['ip'] . '</td>';
 610                 echo '<td>' .
 611                 '<form action = "admin.php" method = "post">' .
 612                 '<input type = "hidden" name = "action" value = "delete_link"/>' .
 613                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 614                 '<input type = "submit" value = "' . t('Del link') . '" />' .
 615                 '</form>' .
 616                 '<form action = "admin.php" method = "post">' .
 617                 '<input type = "hidden" name = "action" value = "delete_file"/>' .
 618                 '<input type = "hidden" name = "md5" value = "' . $l['md5'] . '"/>' .
 619                 '<input type = "submit" value = "' . t('Del file and links') . '" />' .
 620                 '</form>' .
 621                 '</td>';
 622                 echo '</tr>';
 623             }
 624         }
 625     }
 626     echo '</table></fieldset>';
 627 }
 628
 629 /**
 630  * Clean expired files.
 631  * @return number of cleaned files.
 632  */
 633 function
 634 jirafeau_admin_clean ()
 635 {
 636     $count = 0;
 637     /* Get all links files. */
 638     $stack = array (VAR_LINKS);
 639     while (($d = array_shift ($stack)) && $d != NULL)
 640     {
 641         $dir = scandir ($d);
 642
 643         foreach ($dir as $node)
 644         {
 645             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 646                 preg_match ('/\.tmp/i', "$node"))
 647                 continue;
 648
 649             if (is_dir ($d . $node))
 650             {
 651                 /* Push new found directory. */
 652                 $stack[] = $d . $node . '/';
 653             }
 654             elseif (is_file ($d . $node))
 655             {
 656                 /* Read link informations. */
 657                 $l = jirafeau_get_link (basename ($node));
 658                 if (!count ($l))
 659                     continue;
 660                 $p = s2p ($l['md5']);
 661                 if ($l['time'] > 0 && $l['time'] < time () || // expired
 662                     !file_exists (VAR_FILES . $p . $l['md5']) || // invalid
 663                     !file_exists (VAR_FILES . $p . $l['md5'] . '_count')) // invalid
 664                 {
 665                     jirafeau_delete_link ($node);
 666                     $count++;
 667                 }
 668             }
 669         }
 670     }
 671     return $count;
 672 }
 673
 674
 675 /**
 676  * Clean old async transferts.
 677  * @return number of cleaned files.
 678  */
 679 function
 680 jirafeau_admin_clean_async ()
 681 {
 682     $count = 0;
 683     /* Get all links files. */
 684     $stack = array (VAR_ASYNC);
 685     while (($d = array_shift ($stack)) && $d != NULL)
 686     {
 687         $dir = scandir ($d);
 688
 689         foreach ($dir as $node)
 690         {
 691             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 692                 preg_match ('/\.tmp/i', "$node"))
 693                 continue;
 694
 695             if (is_dir ($d . $node))
 696             {
 697                 /* Push new found directory. */
 698                 $stack[] = $d . $node . '/';
 699             }
 700             elseif (is_file ($d . $node))
 701             {
 702                 /* Read async informations. */
 703                 $a = jirafeau_get_async_ref (basename ($node));
 704                 if (!count ($a))
 705                     continue;
 706                 /* Delete transferts older than 1 hour. */
 707                 if (date ('U') - $a['last_edited'] > 3600)
 708                 {
 709                     jirafeau_async_delete (basename ($node));
 710                     $count++;
 711                 }
 712             }
 713         }
 714     }
 715     return $count;
 716 }
 717 /**
 718  * Read async transfert informations
 719  * @return array containing informations.
 720  */
 721 function
 722 jirafeau_get_async_ref ($ref)
 723 {
 724     $out = array ();
 725     $refinfos = VAR_ASYNC . s2p ("$ref") . "$ref";
 726
 727     if (!file_exists ($refinfos))
 728         return $out;
 729
 730     $c = file ($refinfos);
 731     $out['file_name'] = trim ($c[0]);
 732     $out['mime_type'] = trim ($c[1]);
 733     $out['key'] = trim ($c[2], NL);
 734     $out['time'] = trim ($c[3]);
 735     $out['onetime'] = trim ($c[4]);
 736     $out['ip'] = trim ($c[5]);
 737     $out['last_edited'] = trim ($c[6]);
 738     $out['next_code'] = trim ($c[7]);
 739     return $out;
 740 }
 741
 742 /**
 743  * Delete async transfert informations
 744   */
 745 function
 746 jirafeau_async_delete ($ref)
 747 {
 748     $p = s2p ("$ref");
 749     if (file_exists (VAR_ASYNC . $p . $ref))
 750         unlink (VAR_ASYNC . $p . $ref);
 751     if (file_exists (VAR_ASYNC . $p . $ref . '_data'))
 752         unlink (VAR_ASYNC . $p . $ref . '_data');
 753     $parse = VAR_ASYNC . $p;
 754     $scan = array();
 755     while (file_exists ($parse)
 756            && ($scan = scandir ($parse))
 757            && count ($scan) == 2 // '.' and '..' folders => empty.
 758            && basename ($parse) != basename (VAR_ASYNC))
 759     {
 760         rmdir ($parse);
 761         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 762     }
 763 }
 764
 765 /**
 766   * Init a new asynchronous upload.
 767   * @param $finename Name of the file to send
 768   * @param $one_time One time upload parameter
 769   * @param $key eventual password (or blank)
 770   * @param $time time limit
 771   * @param $ip ip address of the client
 772   * @return  a string containing a temporary reference followed by a code or the string "Error"
 773   */
 774 function
 775 jirafeau_async_init ($filename, $type, $one_time, $key, $time, $ip)
 776 {
 777     $res = 'Error';
 778
 779     /* Create temporary folder. */
 780     $ref;
 781     $p;
 782     $code = jirafeau_gen_random (4);
 783     do
 784     {
 785         $ref = jirafeau_gen_random (32);
 786         $p = VAR_ASYNC . s2p ($ref);
 787     } while (file_exists ($p));
 788     @mkdir ($p, 0755, true);
 789     if (!file_exists ($p))
 790     {
 791         echo "Error";
 792         return;
 793     }
 794
 795     /* md5 password or empty */
 796     $password = '';
 797     if (!empty ($key))
 798         $password = md5 ($key);
 799
 800     /* Store informations. */
 801     $p .= $ref;
 802     $handle = fopen ($p, 'w');
 803     fwrite ($handle,
 804             $filename . NL. $type . NL. $password . NL. $time . NL .
 805             ($one_time ? 'O' : 'R') . NL . $ip . NL . date ('U') . NL .
 806             $code . NL);
 807     fclose ($handle);
 808
 809     return $ref . NL . $code ;
 810 }
 811
 812 /**
 813   * Append a piece of file on the asynchronous upload.
 814   * @param $ref asynchronous upload reference
 815   * @param $file piece of data
 816   * @param $code client code for this operation
 817   * @return  a string containing a next code to use or the string "Error"
 818   */
 819 function
 820 jirafeau_async_push ($ref, $data, $code)
 821 {
 822     /* Get async infos. */
 823     $a = jirafeau_get_async_ref ($ref);
 824
 825     /* Check some errors. */
 826     if (count ($a) == 0
 827         || $a['next_code'] != "$code"
 828         || empty ($data['tmp_name'])
 829         || !is_uploaded_file ($data['tmp_name']))
 830         return "Error";
 831
 832     $p = s2p ($ref);
 833
 834     /* Concatenate data. */
 835     $r = fopen ($data['tmp_name'], 'r');
 836     $w = fopen (VAR_ASYNC . $p . $ref . '_data', 'a');
 837     while (!feof ($r))
 838     {
 839         if (fwrite ($w, fread ($r, 1024)) === false)
 840         {
 841             fclose ($r);
 842             fclose ($w);
 843             jirafeau_async_delete ($ref);
 844             return "Error";
 845         }
 846     }
 847     fclose ($r);
 848     fclose ($w);
 849     unlink ($data['tmp_name']);
 850
 851     /* Update async file. */
 852     $code = jirafeau_gen_random (4);
 853     $handle = fopen (VAR_ASYNC . $p . $ref, 'w');
 854     fwrite ($handle,
 855             $a['file_name'] . NL. $a['mime_type'] . NL. $a['key'] . NL .
 856             $a['time'] . NL . $a['onetime'] . NL . $a['ip'] . NL .
 857             date ('U') . NL . $code . NL);
 858     fclose ($handle);
 859     return $code;
 860 }
 861
 862 /**
 863   * Finalyze an asynchronous upload.
 864   * @param $ref asynchronous upload reference
 865   * @param $code client code for this operation
 866   * @return  a string containing the download reference followed by a delete code or the string "Error"
 867   */
 868 function
 869 jirafeau_async_end ($ref, $code)
 870 {
 871     /* Get async infos. */
 872     $a = jirafeau_get_async_ref ($ref);
 873     if (count ($a) == 0
 874         || $a['next_code'] != "$code")
 875         return "Error";
 876
 877     /* Generate link infos. */
 878     $p = VAR_ASYNC . s2p ($ref) . $ref . "_data";
 879     if (!file_exists($p))
 880         return "Error";
 881     $md5 = md5_file ($p);
 882     $size = filesize($p);
 883     $np = s2p ($md5);
 884     $delete_link_code = jirafeau_gen_random (8);
 885
 886     /* File already exist ? */
 887     if (!file_exists (VAR_FILES . $np))
 888         @mkdir (VAR_FILES . $np, 0755, true);
 889     if (!file_exists (VAR_FILES . $np . $md5))
 890         rename ($p, VAR_FILES . $np . $md5);
 891
 892     /* Increment or create count file. */
 893     $counter = 0;
 894     if (file_exists (VAR_FILES . $np . $md5 . '_count'))
 895     {
 896         $content = file (VAR_FILES . $np . $md5. '_count');
 897         $counter = trim ($content[0]);
 898     }
 899     $counter++;
 900     $handle = fopen (VAR_FILES . $np . $md5. '_count', 'w');
 901     fwrite ($handle, $counter);
 902     fclose ($handle);
 903
 904     /* Create link. */
 905     $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
 906     $handle = fopen ($link_tmp_name, 'w');
 907     fwrite ($handle,
 908             $a['file_name'] . NL . $a['mime_type'] . NL . $size . NL .
 909             $a['key'] . NL . $a['time'] . NL . $md5 . NL . $a['onetime'] . NL .
 910             date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL);
 911     fclose ($handle);
 912     $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
 913     $l = s2p ("$md5_link");
 914     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
 915         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
 916         echo "Error";
 917
 918     /* Clean async upload. */
 919     jirafeau_async_delete ($ref);
 920     return $md5_link . NL . $delete_link_code;
 921 }
 922 ?>