Verzeichnisstruktur phpBB-3.0.0
- Veröffentlicht
- 12.12.2007
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functions_compress.php
001 <?php
002 /**
003 *
004 * @package phpBB3
005 * @version $Id$
006 * @copyright (c) 2005 phpBB Group
007 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
008 *
009 */
010
011 /**
012 * @ignore
013 */
014 if (!defined('IN_PHPBB'))
015 {
016 exit;
017 }
018
019 /**
020 * Class for handling archives (compression/decompression)
021 * @package phpBB3
022 */
023 class compress
024 {
025 var $fp = 0;
026
027 /**
028 * Add file to archive
029 */
030 function add_file($src, $src_rm_prefix = '', $src_add_prefix = '', $skip_files = '')
031 {
032 global $phpbb_root_path;
033
034 $skip_files = explode(',', $skip_files);
035
036 // Remove rm prefix from src path
037 $src_path = ($src_rm_prefix) ? preg_replace('#^(' . preg_quote($src_rm_prefix, '#') . ')#', '', $src) : $src;
038 // Add src prefix
039 $src_path = ($src_add_prefix) ? ($src_add_prefix . ((substr($src_add_prefix, -1) != '/') ? '/' : '') . $src_path) : $src_path;
040 // Remove initial "/" if present
041 $src_path = (substr($src_path, 0, 1) == '/') ? substr($src_path, 1) : $src_path;
042
043 if (is_file($phpbb_root_path . $src))
044 {
045 $this->data($src_path, file_get_contents("$phpbb_root_path$src"), false, stat("$phpbb_root_path$src"));
046 }
047 else if (is_dir($phpbb_root_path . $src))
048 {
049 // Clean up path, add closing / if not present
050 $src_path = ($src_path && substr($src_path, -1) != '/') ? $src_path . '/' : $src_path;
051
052 $filelist = array();
053 $filelist = filelist("$phpbb_root_path$src", '', '*');
054 krsort($filelist);
055
056 if ($src_path)
057 {
058 $this->data($src_path, '', true, stat("$phpbb_root_path$src"));
059 }
060
061 foreach ($filelist as $path => $file_ary)
062 {
063 if ($path)
064 {
065 // Same as for src_path
066 $path = (substr($path, 0, 1) == '/') ? substr($path, 1) : $path;
067 $path = ($path && substr($path, -1) != '/') ? $path . '/' : $path;
068
069 $this->data("$src_path$path", '', true, stat("$phpbb_root_path$src$path"));
070 }
071
072 foreach ($file_ary as $file)
073 {
074 if (in_array($path . $file, $skip_files))
075 {
076 continue;
077 }
078
079 $this->data("$src_path$path$file", file_get_contents("$phpbb_root_path$src$path$file"), false, stat("$phpbb_root_path$src$path$file"));
080 }
081 }
082 }
083
084 return true;
085 }
086
087 /**
088 * Add custom file (the filepath will not be adjusted)
089 */
090 function add_custom_file($src, $filename)
091 {
092 $this->data($filename, file_get_contents($src), false, stat($src));
093 return true;
094 }
095
096 /**
097 * Add file data
098 */
099 function add_data($src, $name)
100 {
101 $stat = array();
102 $stat[2] = 436; //384
103 $stat[4] = $stat[5] = 0;
104 $stat[7] = strlen($src);
105 $stat[9] = time();
106 $this->data($name, $src, false, $stat);
107 return true;
108 }
109
110 /**
111 * Return available methods
112 */
113 function methods()
114 {
115 $methods = array('.tar');
116 $available_methods = array('.tar.gz' => 'zlib', '.tar.bz2' => 'bz2', '.zip' => 'zlib');
117
118 foreach ($available_methods as $type => $module)
119 {
120 if (!@extension_loaded($module))
121 {
122 continue;
123 }
124 $methods[] = $type;
125 }
126
127 return $methods;
128 }
129 }
130
131 /**
132 * Zip creation class from phpMyAdmin 2.3.0 (c) Tobias Ratschiller, Olivier M�ller, Lo�c Chapeaux,
133 * Marc Delisle, http://www.phpmyadmin.net/
134 *
135 * Zip extraction function by Alexandre Tedeschi, alexandrebr at gmail dot com
136 *
137 * Modified extensively by psoTFX and DavidMJ, (c) phpBB Group, 2003
138 *
139 * Based on work by Eric Mueller and Denis125
140 * Official ZIP file format: http://www.pkware.com/appnote.txt
141 *
142 * @package phpBB3
143 */
144 class compress_zip extends compress
145 {
146 var $datasec = array();
147 var $ctrl_dir = array();
148 var $eof_cdh = "\x50\x4b\x05\x06\x00\x00\x00\x00";
149
150 var $old_offset = 0;
151 var $datasec_len = 0;
152
153 /**
154 * Constructor
155 */
156 function compress_zip($mode, $file)
157 {
158 return $this->fp = @fopen($file, $mode . 'b');
159 }
160
161 /**
162 * Convert unix to dos time
163 */
164 function unix_to_dos_time($time)
165 {
166 $timearray = (!$time) ? getdate() : getdate($time);
167
168 if ($timearray['year'] < 1980)
169 {
170 $timearray['year'] = 1980;
171 $timearray['mon'] = $timearray['mday'] = 1;
172 $timearray['hours'] = $timearray['minutes'] = $timearray['seconds'] = 0;
173 }
174
175 return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
176 }
177
178 /**
179 * Extract archive
180 */
181 function extract($dst)
182 {
183 // Loop the file, looking for files and folders
184 $dd_try = false;
185 rewind($this->fp);
186
187 while (!feof($this->fp))
188 {
189 // Check if the signature is valid...
190 $signature = fread($this->fp, 4);
191
192 switch ($signature)
193 {
194 // 'Local File Header'
195 case "\x50\x4b\x03\x04":
196 // Lets get everything we need.
197 // We don't store the version needed to extract, the general purpose bit flag or the date and time fields
198 $data = unpack("@4/vc_method/@10/Vcrc/Vc_size/Vuc_size/vname_len/vextra_field", fread($this->fp, 26));
199 $file_name = fread($this->fp, $data['name_len']); // filename
200
201 if ($data['extra_field'])
202 {
203 fread($this->fp, $data['extra_field']); // extra field
204 }
205
206 $target_filename = "$dst$file_name";
207
208 if (!$data['uc_size'] && !$data['crc'] && substr($file_name, -1, 1) == '/')
209 {
210 if (!is_dir($target_filename))
211 {
212 $str = '';
213 $folders = explode('/', $target_filename);
214
215 // Create and folders and subfolders if they do not exist
216 foreach ($folders as $folder)
217 {
218 $str = (!empty($str)) ? $str . '/' . $folder : $folder;
219 if (!is_dir($str))
220 {
221 if (!@mkdir($str, 0777))
222 {
223 trigger_error("Could not create directory $folder");
224 }
225 @chmod($str, 0777);
226 }
227 }
228 }
229 // This is a directory, we are not writting files
230 continue;
231 }
232 else
233 {
234 // Some archivers are punks, they don't don't include folders in their archives!
235 $str = '';
236 $folders = explode('/', pathinfo($target_filename, PATHINFO_DIRNAME));
237
238 // Create and folders and subfolders if they do not exist
239 foreach ($folders as $folder)
240 {
241 $str = (!empty($str)) ? $str . '/' . $folder : $folder;
242 if (!is_dir($str))
243 {
244 if (!@mkdir($str, 0777))
245 {
246 trigger_error("Could not create directory $folder");
247 }
248 @chmod($str, 0777);
249 }
250 }
251 }
252
253 if (!$data['uc_size'])
254 {
255 $content = '';
256 }
257 else
258 {
259 $content = fread($this->fp, $data['c_size']);
260 }
261
262 $fp = fopen($target_filename, "w");
263
264 switch ($data['c_method'])
265 {
266 case 0:
267 // Not compressed
268 fwrite($fp, $content);
269 break;
270
271 case 8:
272 // Deflate
273 fwrite($fp, gzinflate($content, $data['uc_size']));
274 break;
275
276 case 12:
277 // Bzip2
278 fwrite($fp, bzdecompress($content));
279 break;
280 }
281
282 fclose($fp);
283 break;
284
285 // We hit the 'Central Directory Header', we can stop because nothing else in here requires our attention
286 // or we hit the end of the central directory record, we can safely end the loop as we are totally finished with looking for files and folders
287 case "\x50\x4b\x01\x02":
288 // This case should simply never happen.. but it does exist..
289 case "\x50\x4b\x05\x06":
290 break 2;
291
292 // 'Packed to Removable Disk', ignore it and look for the next signature...
293 case 'PK00':
294 continue 2;
295
296 // We have encountered a header that is weird. Lets look for better data...
297 default:
298 if (!$dd_try)
299 {
300 // Unexpected header. Trying to detect wrong placed 'Data Descriptor';
301 $dd_try = true;
302 fseek($this->fp, 8, SEEK_CUR); // Jump over 'crc-32'(4) 'compressed-size'(4), 'uncompressed-size'(4)
303 continue 2;
304 }
305 trigger_error("Unexpected header, ending loop");
306 break 2;
307 }
308
309 $dd_try = false;
310 }
311 }
312
313 /**
314 * Close archive
315 */
316 function close()
317 {
318 // Write out central file directory and footer ... if it exists
319 if (sizeof($this->ctrl_dir))
320 {
321 fwrite($this->fp, $this->file());
322 }
323 fclose($this->fp);
324 }
325
326 /**
327 * Create the structures ... note we assume version made by is MSDOS
328 */
329 function data($name, $data, $is_dir = false, $stat)
330 {
331 $name = str_replace('\\', '/', $name);
332
333 $hexdtime = pack('V', $this->unix_to_dos_time($stat[9]));
334
335 if ($is_dir)
336 {
337 $unc_len = $c_len = $crc = 0;
338 $zdata = '';
339 $var_ext = 10;
340 }
341 else
342 {
343 $unc_len = strlen($data);
344 $crc = crc32($data);
345 $zdata = gzdeflate($data);
346 $c_len = strlen($zdata);
347 $var_ext = 20;
348
349 // Did we compress? No, then use data as is
350 if ($c_len >= $unc_len)
351 {
352 $zdata = $data;
353 $c_len = $unc_len;
354 $var_ext = 10;
355 }
356 }
357 unset($data);
358
359 // If we didn't compress set method to store, else deflate
360 $c_method = ($c_len == $unc_len) ? "\x00\x00" : "\x08\x00";
361
362 // Are we a file or a directory? Set archive for file
363 $attrib = ($is_dir) ? 16 : 32;
364
365 // File Record Header
366 $fr = "\x50\x4b\x03\x04"; // Local file header 4bytes
367 $fr .= pack('v', $var_ext); // ver needed to extract 2bytes
368 $fr .= "\x00\x00"; // gen purpose bit flag 2bytes
369 $fr .= $c_method; // compression method 2bytes
370 $fr .= $hexdtime; // last mod time and date 2+2bytes
371 $fr .= pack('V', $crc); // crc32 4bytes
372 $fr .= pack('V', $c_len); // compressed filesize 4bytes
373 $fr .= pack('V', $unc_len); // uncompressed filesize 4bytes
374 $fr .= pack('v', strlen($name));// length of filename 2bytes
375
376 $fr .= pack('v', 0); // extra field length 2bytes
377 $fr .= $name;
378 $fr .= $zdata;
379 unset($zdata);
380
381 $this->datasec_len += strlen($fr);
382
383 // Add data to file ... by writing data out incrementally we save some memory
384 fwrite($this->fp, $fr);
385 unset($fr);
386
387 // Central Directory Header
388 $cdrec = "\x50\x4b\x01\x02"; // header 4bytes
389 $cdrec .= "\x00\x00"; // version made by
390 $cdrec .= pack('v', $var_ext); // version needed to extract
391 $cdrec .= "\x00\x00"; // gen purpose bit flag
392 $cdrec .= $c_method; // compression method
393 $cdrec .= $hexdtime; // last mod time & date
394 $cdrec .= pack('V', $crc); // crc32
395 $cdrec .= pack('V', $c_len); // compressed filesize
396 $cdrec .= pack('V', $unc_len); // uncompressed filesize
397 $cdrec .= pack('v', strlen($name)); // length of filename
398 $cdrec .= pack('v', 0); // extra field length
399 $cdrec .= pack('v', 0); // file comment length
400 $cdrec .= pack('v', 0); // disk number start
401 $cdrec .= pack('v', 0); // internal file attributes
402 $cdrec .= pack('V', $attrib); // external file attributes
403 $cdrec .= pack('V', $this->old_offset); // relative offset of local header
404 $cdrec .= $name;
405
406 // Save to central directory
407 $this->ctrl_dir[] = $cdrec;
408
409 $this->old_offset = $this->datasec_len;
410 }
411
412 /**
413 * file
414 */
415 function file()
416 {
417 $ctrldir = implode('', $this->ctrl_dir);
418
419 return $ctrldir . $this->eof_cdh .
420 pack('v', sizeof($this->ctrl_dir)) . // total # of entries "on this disk"
421 pack('v', sizeof($this->ctrl_dir)) . // total # of entries overall
422 pack('V', strlen($ctrldir)) . // size of central dir
423 pack('V', $this->datasec_len) . // offset to start of central dir
424 "\x00\x00"; // .zip file comment length
425 }
426
427 /**
428 * Download archive
429 */
430 function download($filename, $download_name = false)
431 {
432 global $phpbb_root_path;
433
434 if ($download_name === false)
435 {
436 $download_name = $filename;
437 }
438
439 $mimetype = 'application/zip';
440
441 header('Pragma: no-cache');
442 header("Content-Type: $mimetype; name=\"$download_name.zip\"");
443 header("Content-disposition: attachment; filename=$download_name.zip");
444
445 $fp = @fopen("{$phpbb_root_path}store/$filename.zip", 'rb');
446 if ($fp)
447 {
448 while ($buffer = fread($fp, 1024))
449 {
450 echo $buffer;
451 }
452 fclose($fp);
453 }
454 }
455 }
456
457 /**
458 * Tar/tar.gz compression routine
459 * Header/checksum creation derived from tarfile.pl, (c) Tom Horsley, 1994
460 *
461 * @package phpBB3
462 */
463 class compress_tar extends compress
464 {
465 var $isgz = false;
466 var $isbz = false;
467 var $filename = '';
468 var $mode = '';
469 var $type = '';
470 var $wrote = false;
471
472 /**
473 * Constructor
474 */
475 function compress_tar($mode, $file, $type = '')
476 {
477 $type = (!$type) ? $file : $type;
478 $this->isgz = (strpos($type, '.tar.gz') !== false || strpos($type, '.tgz') !== false) ? true : false;
479 $this->isbz = (strpos($type, '.tar.bz2') !== false) ? true : false;
480
481 $this->mode = &$mode;
482 $this->file = &$file;
483 $this->type = &$type;
484 $this->open();
485 }
486
487 /**
488 * Extract archive
489 */
490 function extract($dst)
491 {
492 $fzread = ($this->isbz && function_exists('bzread')) ? 'bzread' : (($this->isgz && @extension_loaded('zlib')) ? 'gzread' : 'fread');
493
494 // Run through the file and grab directory entries
495 while ($buffer = $fzread($this->fp, 512))
496 {
497 $tmp = unpack('A6magic', substr($buffer, 257, 6));
498
499 if (trim($tmp['magic']) == 'ustar')
500 {
501 $tmp = unpack('A100name', $buffer);
502 $filename = trim($tmp['name']);
503
504 $tmp = unpack('Atype', substr($buffer, 156, 1));
505 $filetype = (int) trim($tmp['type']);
506
507 $tmp = unpack('A12size', substr($buffer, 124, 12));
508 $filesize = octdec((int) trim($tmp['size']));
509
510 if ($filetype == 5)
511 {
512 if (!is_dir("$dst$filename"))
513 {
514 $str = '';
515 $folders = explode('/', "$dst$filename");
516
517 // Create and folders and subfolders if they do not exist
518 foreach ($folders as $folder)
519 {
520 $str = (!empty($str)) ? $str . '/' . $folder : $folder;
521 if (!is_dir($str))
522 {
523 if (!@mkdir($str, 0777))
524 {
525 trigger_error("Could not create directory $folder");
526 }
527 @chmod($str, 0777);
528 }
529 }
530 }
531 }
532 else if ($filesize != 0 && ($filetype == 0 || $filetype == "\0"))
533 {
534 // Write out the files
535 if (!($fp = fopen("$dst$filename", 'wb')))
536 {
537 trigger_error("Couldn't create file $filename");
538 }
539 @chmod("$dst$filename", 0777);
540
541 // Grab the file contents
542 fwrite($fp, $fzread($this->fp, ($filesize + 511) &~ 511), $filesize);
543 fclose($fp);
544 }
545 }
546 }
547 }
548
549 /**
550 * Close archive
551 */
552 function close()
553 {
554 $fzclose = ($this->isbz && function_exists('bzclose')) ? 'bzclose' : (($this->isgz && @extension_loaded('zlib')) ? 'gzclose' : 'fclose');
555
556 if ($this->wrote)
557 {
558 $fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite');
559
560 // The end of a tar archive ends in two records of all NULLs (1024 bytes of \0)
561 $fzwrite($this->fp, str_repeat("\0", 1024));
562 }
563
564 $fzclose($this->fp);
565 }
566
567 /**
568 * Create the structures
569 */
570 function data($name, $data, $is_dir = false, $stat)
571 {
572 $this->wrote = true;
573 $fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite');
574
575 $typeflag = ($is_dir) ? '5' : '';
576
577 // This is the header data, it contains all the info we know about the file or folder that we are about to archive
578 $header = '';
579 $header .= pack('a100', $name); // file name
580 $header .= pack('a8', sprintf("%07o", $stat[2])); // file mode
581 $header .= pack('a8', sprintf("%07o", $stat[4])); // owner id
582 $header .= pack('a8', sprintf("%07o", $stat[5])); // group id
583 $header .= pack('a12', sprintf("%011o", $stat[7])); // file size
584 $header .= pack('a12', sprintf("%011o", $stat[9])); // last mod time
585
586 // Checksum
587 $checksum = 0;
588 for ($i = 0; $i < 148; $i++)
589 {
590 $checksum += ord($header[$i]);
591 }
592
593 // We precompute the rest of the hash, this saves us time in the loop and allows us to insert our hash without resorting to string functions
594 $checksum += 2415 + (($is_dir) ? 53 : 0);
595
596 $header .= pack('a8', sprintf("%07o", $checksum)); // checksum
597 $header .= pack('a1', $typeflag); // link indicator
598 $header .= pack('a100', ''); // name of linked file
599 $header .= pack('a6', 'ustar'); // ustar indicator
600 $header .= pack('a2', '00'); // ustar version
601 $header .= pack('a32', 'Unknown'); // owner name
602 $header .= pack('a32', 'Unknown'); // group name
603 $header .= pack('a8', ''); // device major number
604 $header .= pack('a8', ''); // device minor number
605 $header .= pack('a155', ''); // filename prefix
606 $header .= pack('a12', ''); // end
607
608 // This writes the entire file in one shot. Header, followed by data and then null padded to a multiple of 512
609 $fzwrite($this->fp, $header . (($stat[7] !== 0 && !$is_dir) ? $data . str_repeat("\0", (($stat[7] + 511) &~ 511) - $stat[7]) : ''));
610 unset($data);
611 }
612
613 /**
614 * Open archive
615 */
616 function open()
617 {
618 $fzopen = ($this->isbz && function_exists('bzopen')) ? 'bzopen' : (($this->isgz && @extension_loaded('zlib')) ? 'gzopen' : 'fopen');
619 $this->fp = @$fzopen($this->file, $this->mode . (($fzopen == 'bzopen') ? '' : 'b') . (($fzopen == 'gzopen') ? '9' : ''));
620
621 if (!$this->fp)
622 {
623 trigger_error('Unable to open file ' . $this->file . ' [' . $fzopen . ' - ' . $this->mode . 'b]');
624 }
625 }
626
627 /**
628 * Download archive
629 */
630 function download($filename, $download_name = false)
631 {
632 global $phpbb_root_path;
633
634 if ($download_name === false)
635 {
636 $download_name = $filename;
637 }
638
639 switch ($this->type)
640 {
641 case '.tar':
642 $mimetype = 'application/x-tar';
643 break;
644
645 case '.tar.gz':
646 $mimetype = 'application/x-gzip';
647 break;
648
649 case '.tar.bz2':
650 $mimetype = 'application/x-bzip2';
651 break;
652
653 default:
654 $mimetype = 'application/octet-stream';
655 break;
656 }
657
658 header('Pragma: no-cache');
659 header("Content-Type: $mimetype; name=\"$download_name$this->type\"");
660 header("Content-disposition: attachment; filename=$download_name$this->type");
661
662 $fp = @fopen("{$phpbb_root_path}store/$filename$this->type", 'rb');
663 if ($fp)
664 {
665 while ($buffer = fread($fp, 1024))
666 {
667 echo $buffer;
668 }
669 fclose($fp);
670 }
671 }
672 }
673
674 ?>