root / trunk / phpBB / includes / functions_compress.php
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| 1 | <?php
|
|---|---|
| 2 | /**
|
| 3 | * |
| 4 | * @package phpBB3 |
| 5 | * @copyright (c) 2005 phpBB Group |
| 6 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2 |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | /**
|
| 11 | * @ignore |
| 12 | */ |
| 13 | if (!defined('IN_PHPBB')) |
| 14 | {
|
| 15 | exit;
|
| 16 | } |
| 17 | |
| 18 | /**
|
| 19 | * Class for handling archives (compression/decompression) |
| 20 | * @package phpBB3 |
| 21 | */ |
| 22 | class compress |
| 23 | {
|
| 24 | var $fp = 0; |
| 25 | |
| 26 | /**
|
| 27 | * Add file to archive |
| 28 | */ |
| 29 | function add_file($src, $src_rm_prefix = '', $src_add_prefix = '', $skip_files = '') |
| 30 | {
|
| 31 | global $phpbb_root_path; |
| 32 | |
| 33 | $skip_files = explode(',', $skip_files); |
| 34 | |
| 35 | // Remove rm prefix from src path
|
| 36 | $src_path = ($src_rm_prefix) ? preg_replace('#^(' . preg_quote($src_rm_prefix, '#') . ')#', '', $src) : $src; |
| 37 | // Add src prefix
|
| 38 | $src_path = ($src_add_prefix) ? ($src_add_prefix . ((substr($src_add_prefix, -1) != '/') ? '/' : '') . $src_path) : $src_path; |
| 39 | // Remove initial "/" if present
|
| 40 | $src_path = (substr($src_path, 0, 1) == '/') ? substr($src_path, 1) : $src_path; |
| 41 | |
| 42 | if (is_file($phpbb_root_path . $src)) |
| 43 | {
|
| 44 | $this->data($src_path, file_get_contents("$phpbb_root_path$src"), false, stat("$phpbb_root_path$src")); |
| 45 | } |
| 46 | else if (is_dir($phpbb_root_path . $src)) |
| 47 | {
|
| 48 | // Clean up path, add closing / if not present
|
| 49 | $src_path = ($src_path && substr($src_path, -1) != '/') ? $src_path . '/' : $src_path; |
| 50 | |
| 51 | $filelist = array(); |
| 52 | $filelist = filelist("$phpbb_root_path$src", '', '*'); |
| 53 | krsort($filelist); |
| 54 | |
| 55 | /**
|
| 56 | * Commented out, as adding the folders produces corrupted archives |
| 57 | if ($src_path) |
| 58 | {
|
| 59 | $this->data($src_path, '', true, stat("$phpbb_root_path$src"));
|
| 60 | } |
| 61 | */ |
| 62 | |
| 63 | foreach ($filelist as $path => $file_ary) |
| 64 | {
|
| 65 | /**
|
| 66 | * Commented out, as adding the folders produces corrupted archives |
| 67 | if ($path) |
| 68 | {
|
| 69 | // Same as for src_path |
| 70 | $path = (substr($path, 0, 1) == '/') ? substr($path, 1) : $path; |
| 71 | $path = ($path && substr($path, -1) != '/') ? $path . '/' : $path; |
| 72 | |
| 73 | $this->data("$src_path$path", '', true, stat("$phpbb_root_path$src$path"));
|
| 74 | } |
| 75 | */ |
| 76 | |
| 77 | foreach ($file_ary as $file) |
| 78 | {
|
| 79 | if (in_array($path . $file, $skip_files)) |
| 80 | {
|
| 81 | continue;
|
| 82 | } |
| 83 | |
| 84 | $this->data("$src_path$path$file", file_get_contents("$phpbb_root_path$src$path$file"), false, stat("$phpbb_root_path$src$path$file")); |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | else
|
| 89 | {
|
| 90 | // $src does not exist
|
| 91 | return false; |
| 92 | } |
| 93 | |
| 94 | return true; |
| 95 | } |
| 96 | |
| 97 | /**
|
| 98 | * Add custom file (the filepath will not be adjusted) |
| 99 | */ |
| 100 | function add_custom_file($src, $filename) |
| 101 | {
|
| 102 | if (!file_exists($src)) |
| 103 | {
|
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | $this->data($filename, file_get_contents($src), false, stat($src)); |
| 108 | return true; |
| 109 | } |
| 110 | |
| 111 | /**
|
| 112 | * Add file data |
| 113 | */ |
| 114 | function add_data($src, $name) |
| 115 | {
|
| 116 | $stat = array(); |
| 117 | $stat[2] = 436; //384 |
| 118 | $stat[4] = $stat[5] = 0; |
| 119 | $stat[7] = strlen($src); |
| 120 | $stat[9] = time(); |
| 121 | $this->data($name, $src, false, $stat); |
| 122 | return true; |
| 123 | } |
| 124 | |
| 125 | /**
|
| 126 | * Return available methods |
| 127 | */ |
| 128 | function methods() |
| 129 | {
|
| 130 | $methods = array('.tar'); |
| 131 | $available_methods = array('.tar.gz' => 'zlib', '.tar.bz2' => 'bz2', '.zip' => 'zlib'); |
| 132 | |
| 133 | foreach ($available_methods as $type => $module) |
| 134 | {
|
| 135 | if (!@extension_loaded($module)) |
| 136 | {
|
| 137 | continue;
|
| 138 | } |
| 139 | $methods[] = $type; |
| 140 | } |
| 141 | |
| 142 | return $methods; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | /**
|
| 147 | * Zip creation class from phpMyAdmin 2.3.0 (c) Tobias Ratschiller, Olivier Müller, Loïc Chapeaux, |
| 148 | * Marc Delisle, http://www.phpmyadmin.net/ |
| 149 | * |
| 150 | * Zip extraction function by Alexandre Tedeschi, alexandrebr at gmail dot com |
| 151 | * |
| 152 | * Modified extensively by psoTFX and DavidMJ, (c) phpBB Group, 2003 |
| 153 | * |
| 154 | * Based on work by Eric Mueller and Denis125 |
| 155 | * Official ZIP file format: http://www.pkware.com/appnote.txt |
| 156 | * |
| 157 | * @package phpBB3 |
| 158 | */ |
| 159 | class compress_zip extends compress |
| 160 | {
|
| 161 | var $datasec = array(); |
| 162 | var $ctrl_dir = array(); |
| 163 | var $eof_cdh = "\x50\x4b\x05\x06\x00\x00\x00\x00"; |
| 164 | |
| 165 | var $old_offset = 0; |
| 166 | var $datasec_len = 0; |
| 167 | |
| 168 | /**
|
| 169 | * Constructor |
| 170 | */ |
| 171 | function compress_zip($mode, $file) |
| 172 | {
|
| 173 | $this->fp = @fopen($file, $mode . 'b'); |
| 174 | |
| 175 | if (!$this->fp) |
| 176 | {
|
| 177 | trigger_error('Unable to open file ' . $file . ' [' . $mode . 'b]'); |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | /**
|
| 182 | * Convert unix to dos time |
| 183 | */ |
| 184 | function unix_to_dos_time($time) |
| 185 | {
|
| 186 | $timearray = (!$time) ? getdate() : getdate($time); |
| 187 | |
| 188 | if ($timearray['year'] < 1980) |
| 189 | {
|
| 190 | $timearray['year'] = 1980; |
| 191 | $timearray['mon'] = $timearray['mday'] = 1; |
| 192 | $timearray['hours'] = $timearray['minutes'] = $timearray['seconds'] = 0; |
| 193 | } |
| 194 | |
| 195 | return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1); |
| 196 | } |
| 197 | |
| 198 | /**
|
| 199 | * Extract archive |
| 200 | */ |
| 201 | function extract($dst) |
| 202 | {
|
| 203 | // Loop the file, looking for files and folders
|
| 204 | $dd_try = false; |
| 205 | rewind($this->fp); |
| 206 | |
| 207 | while (!feof($this->fp)) |
| 208 | {
|
| 209 | // Check if the signature is valid...
|
| 210 | $signature = fread($this->fp, 4); |
| 211 | |
| 212 | switch ($signature) |
| 213 | {
|
| 214 | // 'Local File Header'
|
| 215 | case "\x50\x4b\x03\x04": |
| 216 | // Lets get everything we need.
|
| 217 | // We don't store the version needed to extract, the general purpose bit flag or the date and time fields
|
| 218 | $data = unpack("@4/vc_method/@10/Vcrc/Vc_size/Vuc_size/vname_len/vextra_field", fread($this->fp, 26)); |
| 219 | $file_name = fread($this->fp, $data['name_len']); // filename |
| 220 | |
| 221 | if ($data['extra_field']) |
| 222 | {
|
| 223 | fread($this->fp, $data['extra_field']); // extra field |
| 224 | } |
| 225 | |
| 226 | $target_filename = "$dst$file_name"; |
| 227 | |
| 228 | if (!$data['uc_size'] && !$data['crc'] && substr($file_name, -1, 1) == '/') |
| 229 | {
|
| 230 | if (!is_dir($target_filename)) |
| 231 | {
|
| 232 | $str = ''; |
| 233 | $folders = explode('/', $target_filename); |
| 234 | |
| 235 | // Create and folders and subfolders if they do not exist
|
| 236 | foreach ($folders as $folder) |
| 237 | {
|
| 238 | $folder = trim($folder); |
| 239 | if (!$folder) |
| 240 | {
|
| 241 | continue;
|
| 242 | } |
| 243 | |
| 244 | $str = (!empty($str)) ? $str . '/' . $folder : $folder; |
| 245 | if (!is_dir($str)) |
| 246 | {
|
| 247 | if (!@mkdir($str, 0777)) |
| 248 | {
|
| 249 | trigger_error("Could not create directory $folder"); |
| 250 | } |
| 251 | phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE); |
| 252 | } |
| 253 | } |
| 254 | } |
| 255 | // This is a directory, we are not writting files
|
| 256 | continue;
|
| 257 | } |
| 258 | else
|
| 259 | {
|
| 260 | // Some archivers are punks, they don't include folders in their archives!
|
| 261 | $str = ''; |
| 262 | $folders = explode('/', pathinfo($target_filename, PATHINFO_DIRNAME)); |
| 263 | |
| 264 | // Create and folders and subfolders if they do not exist
|
| 265 | foreach ($folders as $folder) |
| 266 | {
|
| 267 | $folder = trim($folder); |
| 268 | if (!$folder) |
| 269 | {
|
| 270 | continue;
|
| 271 | } |
| 272 | |
| 273 | $str = (!empty($str)) ? $str . '/' . $folder : $folder; |
| 274 | if (!is_dir($str)) |
| 275 | {
|
| 276 | if (!@mkdir($str, 0777)) |
| 277 | {
|
| 278 | trigger_error("Could not create directory $folder"); |
| 279 | } |
| 280 | phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE); |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | if (!$data['uc_size']) |
| 286 | {
|
| 287 | $content = ''; |
| 288 | } |
| 289 | else
|
| 290 | {
|
| 291 | $content = fread($this->fp, $data['c_size']); |
| 292 | } |
| 293 | |
| 294 | $fp = fopen($target_filename, "w"); |
| 295 | |
| 296 | switch ($data['c_method']) |
| 297 | {
|
| 298 | case 0: |
| 299 | // Not compressed
|
| 300 | fwrite($fp, $content); |
| 301 | break;
|
| 302 | |
| 303 | case 8: |
| 304 | // Deflate
|
| 305 | fwrite($fp, gzinflate($content, $data['uc_size'])); |
| 306 | break;
|
| 307 | |
| 308 | case 12: |
| 309 | // Bzip2
|
| 310 | fwrite($fp, bzdecompress($content)); |
| 311 | break;
|
| 312 | } |
| 313 | |
| 314 | fclose($fp); |
| 315 | break;
|
| 316 | |
| 317 | // We hit the 'Central Directory Header', we can stop because nothing else in here requires our attention
|
| 318 | // 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
|
| 319 | case "\x50\x4b\x01\x02": |
| 320 | // This case should simply never happen.. but it does exist..
|
| 321 | case "\x50\x4b\x05\x06": |
| 322 | break 2; |
| 323 | |
| 324 | // 'Packed to Removable Disk', ignore it and look for the next signature...
|
| 325 | case 'PK00': |
| 326 | continue 2; |
| 327 | |
| 328 | // We have encountered a header that is weird. Lets look for better data...
|
| 329 | default:
|
| 330 | if (!$dd_try) |
| 331 | {
|
| 332 | // Unexpected header. Trying to detect wrong placed 'Data Descriptor';
|
| 333 | $dd_try = true; |
| 334 | fseek($this->fp, 8, SEEK_CUR); // Jump over 'crc-32'(4) 'compressed-size'(4), 'uncompressed-size'(4) |
| 335 | continue 2; |
| 336 | } |
| 337 | trigger_error("Unexpected header, ending loop"); |
| 338 | break 2; |
| 339 | } |
| 340 | |
| 341 | $dd_try = false; |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | /**
|
| 346 | * Close archive |
| 347 | */ |
| 348 | function close() |
| 349 | {
|
| 350 | // Write out central file directory and footer ... if it exists
|
| 351 | if (sizeof($this->ctrl_dir)) |
| 352 | {
|
| 353 | fwrite($this->fp, $this->file()); |
| 354 | } |
| 355 | fclose($this->fp); |
| 356 | } |
| 357 | |
| 358 | /**
|
| 359 | * Create the structures ... note we assume version made by is MSDOS |
| 360 | */ |
| 361 | function data($name, $data, $is_dir = false, $stat) |
| 362 | {
|
| 363 | $name = str_replace('\\', '/', $name); |
| 364 | |
| 365 | $hexdtime = pack('V', $this->unix_to_dos_time($stat[9])); |
| 366 | |
| 367 | if ($is_dir) |
| 368 | {
|
| 369 | $unc_len = $c_len = $crc = 0; |
| 370 | $zdata = ''; |
| 371 | $var_ext = 10; |
| 372 | } |
| 373 | else
|
| 374 | {
|
| 375 | $unc_len = strlen($data); |
| 376 | $crc = crc32($data); |
| 377 | $zdata = gzdeflate($data); |
| 378 | $c_len = strlen($zdata); |
| 379 | $var_ext = 20; |
| 380 | |
| 381 | // Did we compress? No, then use data as is
|
| 382 | if ($c_len >= $unc_len) |
| 383 | {
|
| 384 | $zdata = $data; |
| 385 | $c_len = $unc_len; |
| 386 | $var_ext = 10; |
| 387 | } |
| 388 | } |
| 389 | unset($data); |
| 390 | |
| 391 | // If we didn't compress set method to store, else deflate
|
| 392 | $c_method = ($c_len == $unc_len) ? "\x00\x00" : "\x08\x00"; |
| 393 | |
| 394 | // Are we a file or a directory? Set archive for file
|
| 395 | $attrib = ($is_dir) ? 16 : 32; |
| 396 | |
| 397 | // File Record Header
|
| 398 | $fr = "\x50\x4b\x03\x04"; // Local file header 4bytes |
| 399 | $fr .= pack('v', $var_ext); // ver needed to extract 2bytes |
| 400 | $fr .= "\x00\x00"; // gen purpose bit flag 2bytes |
| 401 | $fr .= $c_method; // compression method 2bytes |
| 402 | $fr .= $hexdtime; // last mod time and date 2+2bytes |
| 403 | $fr .= pack('V', $crc); // crc32 4bytes |
| 404 | $fr .= pack('V', $c_len); // compressed filesize 4bytes |
| 405 | $fr .= pack('V', $unc_len); // uncompressed filesize 4bytes |
| 406 | $fr .= pack('v', strlen($name));// length of filename 2bytes |
| 407 | |
| 408 | $fr .= pack('v', 0); // extra field length 2bytes |
| 409 | $fr .= $name; |
| 410 | $fr .= $zdata; |
| 411 | unset($zdata); |
| 412 | |
| 413 | $this->datasec_len += strlen($fr); |
| 414 | |
| 415 | // Add data to file ... by writing data out incrementally we save some memory
|
| 416 | fwrite($this->fp, $fr); |
| 417 | unset($fr); |
| 418 | |
| 419 | // Central Directory Header
|
| 420 | $cdrec = "\x50\x4b\x01\x02"; // header 4bytes |
| 421 | $cdrec .= "\x00\x00"; // version made by |
| 422 | $cdrec .= pack('v', $var_ext); // version needed to extract |
| 423 | $cdrec .= "\x00\x00"; // gen purpose bit flag |
| 424 | $cdrec .= $c_method; // compression method |
| 425 | $cdrec .= $hexdtime; // last mod time & date |
| 426 | $cdrec .= pack('V', $crc); // crc32 |
| 427 | $cdrec .= pack('V', $c_len); // compressed filesize |
| 428 | $cdrec .= pack('V', $unc_len); // uncompressed filesize |
| 429 | $cdrec .= pack('v', strlen($name)); // length of filename |
| 430 | $cdrec .= pack('v', 0); // extra field length |
| 431 | $cdrec .= pack('v', 0); // file comment length |
| 432 | $cdrec .= pack('v', 0); // disk number start |
| 433 | $cdrec .= pack('v', 0); // internal file attributes |
| 434 | $cdrec .= pack('V', $attrib); // external file attributes |
| 435 | $cdrec .= pack('V', $this->old_offset); // relative offset of local header |
| 436 | $cdrec .= $name; |
| 437 | |
| 438 | // Save to central directory
|
| 439 | $this->ctrl_dir[] = $cdrec; |
| 440 | |
| 441 | $this->old_offset = $this->datasec_len; |
| 442 | } |
| 443 | |
| 444 | /**
|
| 445 | * file |
| 446 | */ |
| 447 | function file() |
| 448 | {
|
| 449 | $ctrldir = implode('', $this->ctrl_dir); |
| 450 | |
| 451 | return $ctrldir . $this->eof_cdh . |
| 452 | pack('v', sizeof($this->ctrl_dir)) . // total # of entries "on this disk" |
| 453 | pack('v', sizeof($this->ctrl_dir)) . // total # of entries overall |
| 454 | pack('V', strlen($ctrldir)) . // size of central dir |
| 455 | pack('V', $this->datasec_len) . // offset to start of central dir |
| 456 | "\x00\x00"; // .zip file comment length |
| 457 | } |
| 458 | |
| 459 | /**
|
| 460 | * Download archive |
| 461 | */ |
| 462 | function download($filename, $download_name = false) |
| 463 | {
|
| 464 | global $phpbb_root_path; |
| 465 | |
| 466 | if ($download_name === false) |
| 467 | {
|
| 468 | $download_name = $filename; |
| 469 | } |
| 470 | |
| 471 | $mimetype = 'application/zip'; |
| 472 | |
| 473 | header('Pragma: no-cache'); |
| 474 | header("Content-Type: $mimetype; name=\"$download_name.zip\""); |
| 475 | header("Content-disposition: attachment; filename=$download_name.zip"); |
| 476 | |
| 477 | $fp = @fopen("{$phpbb_root_path}store/$filename.zip", 'rb'); |
| 478 | if ($fp) |
| 479 | {
|
| 480 | while ($buffer = fread($fp, 1024)) |
| 481 | {
|
| 482 | echo $buffer; |
| 483 | } |
| 484 | fclose($fp); |
| 485 | } |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | /**
|
| 490 | * Tar/tar.gz compression routine |
| 491 | * Header/checksum creation derived from tarfile.pl, (c) Tom Horsley, 1994 |
| 492 | * |
| 493 | * @package phpBB3 |
| 494 | */ |
| 495 | class compress_tar extends compress |
| 496 | {
|
| 497 | var $isgz = false; |
| 498 | var $isbz = false; |
| 499 | var $filename = ''; |
| 500 | var $mode = ''; |
| 501 | var $type = ''; |
| 502 | var $wrote = false; |
| 503 | |
| 504 | /**
|
| 505 | * Constructor |
| 506 | */ |
| 507 | function compress_tar($mode, $file, $type = '') |
| 508 | {
|
| 509 | $type = (!$type) ? $file : $type; |
| 510 | $this->isgz = preg_match('#(\.tar\.gz|\.tgz)$#', $type); |
| 511 | $this->isbz = preg_match('#\.tar\.bz2$#', $type); |
| 512 | |
| 513 | $this->mode = &$mode; |
| 514 | $this->file = &$file; |
| 515 | $this->type = &$type; |
| 516 | $this->open();
|
| 517 | } |
| 518 | |
| 519 | /**
|
| 520 | * Extract archive |
| 521 | */ |
| 522 | function extract($dst) |
| 523 | {
|
| 524 | $fzread = ($this->isbz && function_exists('bzread')) ? 'bzread' : (($this->isgz && @extension_loaded('zlib')) ? 'gzread' : 'fread'); |
| 525 | |
| 526 | // Run through the file and grab directory entries
|
| 527 | while ($buffer = $fzread($this->fp, 512)) |
| 528 | {
|
| 529 | $tmp = unpack('A6magic', substr($buffer, 257, 6)); |
| 530 | |
| 531 | if (trim($tmp['magic']) == 'ustar') |
| 532 | {
|
| 533 | $tmp = unpack('A100name', $buffer); |
| 534 | $filename = trim($tmp['name']); |
| 535 | |
| 536 | $tmp = unpack('Atype', substr($buffer, 156, 1)); |
| 537 | $filetype = (int) trim($tmp['type']); |
| 538 | |
| 539 | $tmp = unpack('A12size', substr($buffer, 124, 12)); |
| 540 | $filesize = octdec((int) trim($tmp['size'])); |
| 541 | |
| 542 | $target_filename = "$dst$filename"; |
| 543 | |
| 544 | if ($filetype == 5) |
| 545 | {
|
| 546 | if (!is_dir($target_filename)) |
| 547 | {
|
| 548 | $str = ''; |
| 549 | $folders = explode('/', $target_filename); |
| 550 | |
| 551 | // Create and folders and subfolders if they do not exist
|
| 552 | foreach ($folders as $folder) |
| 553 | {
|
| 554 | $folder = trim($folder); |
| 555 | if (!$folder) |
| 556 | {
|
| 557 | continue;
|
| 558 | } |
| 559 | |
| 560 | $str = (!empty($str)) ? $str . '/' . $folder : $folder; |
| 561 | if (!is_dir($str)) |
| 562 | {
|
| 563 | if (!@mkdir($str, 0777)) |
| 564 | {
|
| 565 | trigger_error("Could not create directory $folder"); |
| 566 | } |
| 567 | phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE); |
| 568 | } |
| 569 | } |
| 570 | } |
| 571 | } |
| 572 | else if ($filesize >= 0 && ($filetype == 0 || $filetype == "\0")) |
| 573 | {
|
| 574 | // Some archivers are punks, they don't properly order the folders in their archives!
|
| 575 | $str = ''; |
| 576 | $folders = explode('/', pathinfo($target_filename, PATHINFO_DIRNAME)); |
| 577 | |
| 578 | // Create and folders and subfolders if they do not exist
|
| 579 | foreach ($folders as $folder) |
| 580 | {
|
| 581 | $folder = trim($folder); |
| 582 | if (!$folder) |
| 583 | {
|
| 584 | continue;
|
| 585 | } |
| 586 | |
| 587 | $str = (!empty($str)) ? $str . '/' . $folder : $folder; |
| 588 | if (!is_dir($str)) |
| 589 | {
|
| 590 | if (!@mkdir($str, 0777)) |
| 591 | {
|
| 592 | trigger_error("Could not create directory $folder"); |
| 593 | } |
| 594 | phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE); |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | // Write out the files
|
| 599 | if (!($fp = fopen($target_filename, 'wb'))) |
| 600 | {
|
| 601 | trigger_error("Couldn't create file $filename"); |
| 602 | } |
| 603 | phpbb_chmod($target_filename, CHMOD_READ); |
| 604 | |
| 605 | // Grab the file contents
|
| 606 | fwrite($fp, ($filesize) ? $fzread($this->fp, ($filesize + 511) &~ 511) : '', $filesize); |
| 607 | fclose($fp); |
| 608 | } |
| 609 | } |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | /**
|
| 614 | * Close archive |
| 615 | */ |
| 616 | function close() |
| 617 | {
|
| 618 | $fzclose = ($this->isbz && function_exists('bzclose')) ? 'bzclose' : (($this->isgz && @extension_loaded('zlib')) ? 'gzclose' : 'fclose'); |
| 619 | |
| 620 | if ($this->wrote) |
| 621 | {
|
| 622 | $fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite'); |
| 623 | |
| 624 | // The end of a tar archive ends in two records of all NULLs (1024 bytes of \0)
|
| 625 | $fzwrite($this->fp, str_repeat("\0", 1024)); |
| 626 | } |
| 627 | |
| 628 | $fzclose($this->fp); |
| 629 | } |
| 630 | |
| 631 | /**
|
| 632 | * Create the structures |
| 633 | */ |
| 634 | function data($name, $data, $is_dir = false, $stat) |
| 635 | {
|
| 636 | $this->wrote = true; |
| 637 | $fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite'); |
| 638 | |
| 639 | $typeflag = ($is_dir) ? '5' : ''; |
| 640 | |
| 641 | // This is the header data, it contains all the info we know about the file or folder that we are about to archive
|
| 642 | $header = ''; |
| 643 | $header .= pack('a100', $name); // file name |
| 644 | $header .= pack('a8', sprintf("%07o", $stat[2])); // file mode |
| 645 | $header .= pack('a8', sprintf("%07o", $stat[4])); // owner id |
| 646 | $header .= pack('a8', sprintf("%07o", $stat[5])); // group id |
| 647 | $header .= pack('a12', sprintf("%011o", $stat[7])); // file size |
| 648 | $header .= pack('a12', sprintf("%011o", $stat[9])); // last mod time |
| 649 | |
| 650 | // Checksum
|
| 651 | $checksum = 0; |
| 652 | for ($i = 0; $i < 148; $i++) |
| 653 | {
|
| 654 | $checksum += ord($header[$i]); |
| 655 | } |
| 656 | |
| 657 | // 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
|
| 658 | $checksum += 2415 + (($is_dir) ? 53 : 0); |
| 659 | |
| 660 | $header .= pack('a8', sprintf("%07o", $checksum)); // checksum |
| 661 | $header .= pack('a1', $typeflag); // link indicator |
| 662 | $header .= pack('a100', ''); // name of linked file |
| 663 | $header .= pack('a6', 'ustar'); // ustar indicator |
| 664 | $header .= pack('a2', '00'); // ustar version |
| 665 | $header .= pack('a32', 'Unknown'); // owner name |
| 666 | $header .= pack('a32', 'Unknown'); // group name |
| 667 | $header .= pack('a8', ''); // device major number |
| 668 | $header .= pack('a8', ''); // device minor number |
| 669 | $header .= pack('a155', ''); // filename prefix |
| 670 | $header .= pack('a12', ''); // end |
| 671 | |
| 672 | // This writes the entire file in one shot. Header, followed by data and then null padded to a multiple of 512
|
| 673 | $fzwrite($this->fp, $header . (($stat[7] !== 0 && !$is_dir) ? $data . str_repeat("\0", (($stat[7] + 511) &~ 511) - $stat[7]) : '')); |
| 674 | unset($data); |
| 675 | } |
| 676 | |
| 677 | /**
|
| 678 | * Open archive |
| 679 | */ |
| 680 | function open() |
| 681 | {
|
| 682 | $fzopen = ($this->isbz && function_exists('bzopen')) ? 'bzopen' : (($this->isgz && @extension_loaded('zlib')) ? 'gzopen' : 'fopen'); |
| 683 | $this->fp = @$fzopen($this->file, $this->mode . (($fzopen == 'bzopen') ? '' : 'b') . (($fzopen == 'gzopen') ? '9' : '')); |
| 684 | |
| 685 | if (!$this->fp) |
| 686 | {
|
| 687 | trigger_error('Unable to open file ' . $this->file . ' [' . $fzopen . ' - ' . $this->mode . 'b]'); |
| 688 | } |
| 689 | } |
| 690 | |
| 691 | /**
|
| 692 | * Download archive |
| 693 | */ |
| 694 | function download($filename, $download_name = false) |
| 695 | {
|
| 696 | global $phpbb_root_path; |
| 697 | |
| 698 | if ($download_name === false) |
| 699 | {
|
| 700 | $download_name = $filename; |
| 701 | } |
| 702 | |
| 703 | switch ($this->type) |
| 704 | {
|
| 705 | case '.tar': |
| 706 | $mimetype = 'application/x-tar'; |
| 707 | break;
|
| 708 | |
| 709 | case '.tar.gz': |
| 710 | $mimetype = 'application/x-gzip'; |
| 711 | break;
|
| 712 | |
| 713 | case '.tar.bz2': |
| 714 | $mimetype = 'application/x-bzip2'; |
| 715 | break;
|
| 716 | |
| 717 | default:
|
| 718 | $mimetype = 'application/octet-stream'; |
| 719 | break;
|
| 720 | } |
| 721 | |
| 722 | header('Pragma: no-cache'); |
| 723 | header("Content-Type: $mimetype; name=\"$download_name$this->type\""); |
| 724 | header("Content-disposition: attachment; filename=$download_name$this->type"); |
| 725 | |
| 726 | $fp = @fopen("{$phpbb_root_path}store/$filename$this->type", 'rb'); |
| 727 | if ($fp) |
| 728 | {
|
| 729 | while ($buffer = fread($fp, 1024)) |
| 730 | {
|
| 731 | echo $buffer; |
| 732 | } |
| 733 | fclose($fp); |
| 734 | } |
| 735 | } |
| 736 | } |