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1<?php
2/**
3 * Class to create and manage a Zip file.
4 *
5 * Initially inspired by CreateZipFile by Rochak Chauhan www.rochakchauhan.com (http://www.phpclasses.org/browse/package/2322.html)
6 * and
7 * http://www.pkware.com/documents/casestudies/APPNOTE.TXT Zip file specification.
8 *
9 * License: GNU LGPL, Attribution required for commercial implementations, requested for everything else.
10 *
11 * @author A. Grandt <php@grandt.com>
12 * @copyright 2009-2014 A. Grandt
13 * @license GNU LGPL 2.1
14 * @link http://www.phpclasses.org/package/6110
15 * @link https://github.com/Grandt/PHPZip
16 * @version 1.60
17 */
18class Zip {
19 const VERSION = 1.60;
20
21 const ZIP_LOCAL_FILE_HEADER = "\x50\x4b\x03\x04"; // Local file header signature
22 const ZIP_CENTRAL_FILE_HEADER = "\x50\x4b\x01\x02"; // Central file header signature
23 const ZIP_END_OF_CENTRAL_DIRECTORY = "\x50\x4b\x05\x06\x00\x00\x00\x00"; //end of Central directory record
24
25 const EXT_FILE_ATTR_DIR = 010173200020; // Permission 755 drwxr-xr-x = (((S_IFDIR | 0755) << 16) | S_DOS_D);
26 const EXT_FILE_ATTR_FILE = 020151000040; // Permission 644 -rw-r--r-- = (((S_IFREG | 0644) << 16) | S_DOS_A);
27
28 const ATTR_VERSION_TO_EXTRACT = "\x14\x00"; // Version needed to extract
29 const ATTR_MADE_BY_VERSION = "\x1E\x03"; // Made By Version
30
31 // Unix file types
32 const S_IFIFO = 0010000; // named pipe (fifo)
33 const S_IFCHR = 0020000; // character special
34 const S_IFDIR = 0040000; // directory
35 const S_IFBLK = 0060000; // block special
36 const S_IFREG = 0100000; // regular
37 const S_IFLNK = 0120000; // symbolic link
38 const S_IFSOCK = 0140000; // socket
39
40 // setuid/setgid/sticky bits, the same as for chmod:
41
42 const S_ISUID = 0004000; // set user id on execution
43 const S_ISGID = 0002000; // set group id on execution
44 const S_ISTXT = 0001000; // sticky bit
45
46 // And of course, the other 12 bits are for the permissions, the same as for chmod:
47 // When addding these up, you can also just write the permissions as a simgle octal number
48 // ie. 0755. The leading 0 specifies octal notation.
49 const S_IRWXU = 0000700; // RWX mask for owner
50 const S_IRUSR = 0000400; // R for owner
51 const S_IWUSR = 0000200; // W for owner
52 const S_IXUSR = 0000100; // X for owner
53 const S_IRWXG = 0000070; // RWX mask for group
54 const S_IRGRP = 0000040; // R for group
55 const S_IWGRP = 0000020; // W for group
56 const S_IXGRP = 0000010; // X for group
57 const S_IRWXO = 0000007; // RWX mask for other
58 const S_IROTH = 0000004; // R for other
59 const S_IWOTH = 0000002; // W for other
60 const S_IXOTH = 0000001; // X for other
61 const S_ISVTX = 0001000; // save swapped text even after use
62
63 // Filetype, sticky and permissions are added up, and shifted 16 bits left BEFORE adding the DOS flags.
64
65 // DOS file type flags, we really only use the S_DOS_D flag.
66
67 const S_DOS_A = 0000040; // DOS flag for Archive
68 const S_DOS_D = 0000020; // DOS flag for Directory
69 const S_DOS_V = 0000010; // DOS flag for Volume
70 const S_DOS_S = 0000004; // DOS flag for System
71 const S_DOS_H = 0000002; // DOS flag for Hidden
72 const S_DOS_R = 0000001; // DOS flag for Read Only
73
74 private $zipMemoryThreshold = 1048576; // Autocreate tempfile if the zip data exceeds 1048576 bytes (1 MB)
75
76 private $zipData = NULL;
77 private $zipFile = NULL;
78 private $zipComment = NULL;
79 private $cdRec = array(); // central directory
80 private $offset = 0;
81 private $isFinalized = FALSE;
82 private $addExtraField = TRUE;
83
84 private $streamChunkSize = 65536;
85 private $streamFilePath = NULL;
86 private $streamTimestamp = NULL;
87 private $streamFileComment = NULL;
88 private $streamFile = NULL;
89 private $streamData = NULL;
90 private $streamFileLength = 0;
91 private $streamExtFileAttr = null;
92
93 /**
94 * Constructor.
95 *
96 * @param boolean $useZipFile Write temp zip data to tempFile? Default FALSE
97 */
98 function __construct($useZipFile = FALSE) {
99 if ($useZipFile) {
100 $this->zipFile = tmpfile();
101 } else {
102 $this->zipData = "";
103 }
104 }
105
106 function __destruct() {
107 if (is_resource($this->zipFile)) {
108 fclose($this->zipFile);
109 }
110 $this->zipData = NULL;
111 }
112
113 /**
114 * Extra fields on the Zip directory records are Unix time codes needed for compatibility on the default Mac zip archive tool.
115 * These are enabled as default, as they do no harm elsewhere and only add 26 bytes per file added.
116 *
117 * @param bool $setExtraField TRUE (default) will enable adding of extra fields, anything else will disable it.
118 */
119 function setExtraField($setExtraField = TRUE) {
120 $this->addExtraField = ($setExtraField === TRUE);
121 }
122
123 /**
124 * Set Zip archive comment.
125 *
126 * @param string $newComment New comment. NULL to clear.
127 * @return bool $success
128 */
129 public function setComment($newComment = NULL) {
130 if ($this->isFinalized) {
131 return FALSE;
132 }
133 $this->zipComment = $newComment;
134
135 return TRUE;
136 }
137
138 /**
139 * Set zip file to write zip data to.
140 * This will cause all present and future data written to this class to be written to this file.
141 * This can be used at any time, even after the Zip Archive have been finalized. Any previous file will be closed.
142 * Warning: If the given file already exists, it will be overwritten.
143 *
144 * @param string $fileName
145 * @return bool $success
146 */
147 public function setZipFile($fileName) {
148 if (is_file($fileName)) {
149 unlink($fileName);
150 }
151 $fd=fopen($fileName, "x+b");
152 if (is_resource($this->zipFile)) {
153 rewind($this->zipFile);
154 while (!feof($this->zipFile)) {
155 fwrite($fd, fread($this->zipFile, $this->streamChunkSize));
156 }
157
158 fclose($this->zipFile);
159 } else {
160 fwrite($fd, $this->zipData);
161 $this->zipData = NULL;
162 }
163 $this->zipFile = $fd;
164
165 return TRUE;
166 }
167
168 /**
169 * Add an empty directory entry to the zip archive.
170 * Basically this is only used if an empty directory is added.
171 *
172 * @param string $directoryPath Directory Path and name to be added to the archive.
173 * @param int $timestamp (Optional) Timestamp for the added directory, if omitted or set to 0, the current time will be used.
174 * @param string $fileComment (Optional) Comment to be added to the archive for this directory. To use fileComment, timestamp must be given.
175 * @param int $extFileAttr (Optional) The external file reference, use generateExtAttr to generate this.
176 * @return bool $success
177 */
178 public function addDirectory($directoryPath, $timestamp = 0, $fileComment = NULL, $extFileAttr = self::EXT_FILE_ATTR_DIR) {
179 if ($this->isFinalized) {
180 return FALSE;
181 }
182 $directoryPath = str_replace("\\", "/", $directoryPath);
183 $directoryPath = rtrim($directoryPath, "/");
184
185 if (strlen($directoryPath) > 0) {
186 $this->buildZipEntry($directoryPath.'/', $fileComment, "\x00\x00", "\x00\x00", $timestamp, "\x00\x00\x00\x00", 0, 0, $extFileAttr);
187 return TRUE;
188 }
189 return FALSE;
190 }
191
192 /**
193 * Add a file to the archive at the specified location and file name.
194 *
195 * @param string $data File data.
196 * @param string $filePath Filepath and name to be used in the archive.
197 * @param int $timestamp (Optional) Timestamp for the added file, if omitted or set to 0, the current time will be used.
198 * @param string $fileComment (Optional) Comment to be added to the archive for this file. To use fileComment, timestamp must be given.
199 * @param bool $compress (Optional) Compress file, if set to FALSE the file will only be stored. Default TRUE.
200 * @param int $extFileAttr (Optional) The external file reference, use generateExtAttr to generate this.
201 * @return bool $success
202 */
203 public function addFile($data, $filePath, $timestamp = 0, $fileComment = NULL, $compress = TRUE, $extFileAttr = self::EXT_FILE_ATTR_FILE) {
204 if ($this->isFinalized) {
205 return FALSE;
206 }
207
208 if (is_resource($data) && get_resource_type($data) == "stream") {
209 $this->addLargeFile($data, $filePath, $timestamp, $fileComment, $extFileAttr);
210 return FALSE;
211 }
212
213 $gzData = "";
214 $gzType = "\x08\x00"; // Compression type 8 = deflate
215 $gpFlags = "\x00\x00"; // General Purpose bit flags for compression type 8 it is: 0=Normal, 1=Maximum, 2=Fast, 3=super fast compression.
216 $dataLength = strlen($data);
217 $fileCRC32 = pack("V", crc32($data));
218
219 if ($compress) {
220 $gzTmp = gzcompress($data);
221 $gzData = substr(substr($gzTmp, 0, strlen($gzTmp) - 4), 2); // gzcompress adds a 2 byte header and 4 byte CRC we can't use.
222 // The 2 byte header does contain useful data, though in this case the 2 parameters we'd be interrested in will always be 8 for compression type, and 2 for General purpose flag.
223 $gzLength = strlen($gzData);
224 } else {
225 $gzLength = $dataLength;
226 }
227
228 if ($gzLength >= $dataLength) {
229 $gzLength = $dataLength;
230 $gzData = $data;
231 $gzType = "\x00\x00"; // Compression type 0 = stored
232 $gpFlags = "\x00\x00"; // Compression type 0 = stored
233 }
234
235 if (!is_resource($this->zipFile) && ($this->offset + $gzLength) > $this->zipMemoryThreshold) {
236 $this->zipflush();
237 }
238
239 $this->buildZipEntry($filePath, $fileComment, $gpFlags, $gzType, $timestamp, $fileCRC32, $gzLength, $dataLength, $extFileAttr);
240
241 $this->zipwrite($gzData);
242
243 return TRUE;
244 }
245
246 /**
247 * Add the content to a directory.
248 *
249 * @author Adam Schmalhofer <Adam.Schmalhofer@gmx.de>
250 * @author A. Grandt
251 *
252 * @param string $realPath Path on the file system.
253 * @param string $zipPath Filepath and name to be used in the archive.
254 * @param bool $recursive Add content recursively, default is TRUE.
255 * @param bool $followSymlinks Follow and add symbolic links, if they are accessible, default is TRUE.
256 * @param array &$addedFiles Reference to the added files, this is used to prevent duplicates, efault is an empty array.
257 * If you start the function by parsing an array, the array will be populated with the realPath
258 * and zipPath kay/value pairs added to the archive by the function.
259 * @param bool $overrideFilePermissions Force the use of the file/dir permissions set in the $extDirAttr
260 * and $extFileAttr parameters.
261 * @param int $extDirAttr Permissions for directories.
262 * @param int $extFileAttr Permissions for files.
263 */
264 public function addDirectoryContent($realPath, $zipPath, $recursive = TRUE, $followSymlinks = TRUE, &$addedFiles = array(),
265 $overrideFilePermissions = FALSE, $extDirAttr = self::EXT_FILE_ATTR_DIR, $extFileAttr = self::EXT_FILE_ATTR_FILE) {
266 if (file_exists($realPath) && !isset($addedFiles[realpath($realPath)])) {
267 if (is_dir($realPath)) {
268 if ($overrideFilePermissions) {
269 $this->addDirectory($zipPath, 0, null, $extDirAttr);
270 } else {
271 $this->addDirectory($zipPath, 0, null, self::getFileExtAttr($realPath));
272 }
273 }
274
275 $addedFiles[realpath($realPath)] = $zipPath;
276
277 $iter = new DirectoryIterator($realPath);
278 foreach ($iter as $file) {
279 if ($file->isDot()) {
280 continue;
281 }
282 $newRealPath = $file->getPathname();
283 $newZipPath = self::pathJoin($zipPath, $file->getFilename());
284
285 if (file_exists($newRealPath) && ($followSymlinks === TRUE || !is_link($newRealPath))) {
286 if ($file->isFile()) {
287 $addedFiles[realpath($newRealPath)] = $newZipPath;
288 if ($overrideFilePermissions) {
289 $this->addLargeFile($newRealPath, $newZipPath, 0, null, $extFileAttr);
290 } else {
291 $this->addLargeFile($newRealPath, $newZipPath, 0, null, self::getFileExtAttr($newRealPath));
292 }
293 } else if ($recursive === TRUE) {
294 $this->addDirectoryContent($newRealPath, $newZipPath, $recursive, $followSymlinks, $addedFiles, $overrideFilePermissions, $extDirAttr, $extFileAttr);
295 } else {
296 if ($overrideFilePermissions) {
297 $this->addDirectory($zipPath, 0, null, $extDirAttr);
298 } else {
299 $this->addDirectory($zipPath, 0, null, self::getFileExtAttr($newRealPath));
300 }
301 }
302 }
303 }
304 }
305 }
306
307 /**
308 * Add a file to the archive at the specified location and file name.
309 *
310 * @param string $dataFile File name/path.
311 * @param string $filePath Filepath and name to be used in the archive.
312 * @param int $timestamp (Optional) Timestamp for the added file, if omitted or set to 0, the current time will be used.
313 * @param string $fileComment (Optional) Comment to be added to the archive for this file. To use fileComment, timestamp must be given.
314 * @param int $extFileAttr (Optional) The external file reference, use generateExtAttr to generate this.
315 * @return bool $success
316 */
317 public function addLargeFile($dataFile, $filePath, $timestamp = 0, $fileComment = NULL, $extFileAttr = self::EXT_FILE_ATTR_FILE) {
318 if ($this->isFinalized) {
319 return FALSE;
320 }
321
322 if (is_string($dataFile) && is_file($dataFile)) {
323 $this->processFile($dataFile, $filePath, $timestamp, $fileComment, $extFileAttr);
324 } else if (is_resource($dataFile) && get_resource_type($dataFile) == "stream") {
325 $fh = $dataFile;
326 $this->openStream($filePath, $timestamp, $fileComment, $extFileAttr);
327
328 while (!feof($fh)) {
329 $this->addStreamData(fread($fh, $this->streamChunkSize));
330 }
331 $this->closeStream($this->addExtraField);
332 }
333 return TRUE;
334 }
335
336 /**
337 * Create a stream to be used for large entries.
338 *
339 * @param string $filePath Filepath and name to be used in the archive.
340 * @param int $timestamp (Optional) Timestamp for the added file, if omitted or set to 0, the current time will be used.
341 * @param string $fileComment (Optional) Comment to be added to the archive for this file. To use fileComment, timestamp must be given.
342 * @param int $extFileAttr (Optional) The external file reference, use generateExtAttr to generate this.
343 * @return bool $success
344 */
345 public function openStream($filePath, $timestamp = 0, $fileComment = null, $extFileAttr = self::EXT_FILE_ATTR_FILE) {
346 if (!function_exists('sys_get_temp_dir')) {
347 die ("ERROR: Zip " . self::VERSION . " requires PHP version 5.2.1 or above if large files are used.");
348 }
349
350 if ($this->isFinalized) {
351 return FALSE;
352 }
353
354 $this->zipflush();
355
356 if (strlen($this->streamFilePath) > 0) {
357 $this->closeStream();
358 }
359
360 $this->streamFile = tempnam(sys_get_temp_dir(), 'Zip');
361 $this->streamData = fopen($this->streamFile, "wb");
362 $this->streamFilePath = $filePath;
363 $this->streamTimestamp = $timestamp;
364 $this->streamFileComment = $fileComment;
365 $this->streamFileLength = 0;
366 $this->streamExtFileAttr = $extFileAttr;
367
368 return TRUE;
369 }
370
371 /**
372 * Add data to the open stream.
373 *
374 * @param string $data
375 * @return mixed length in bytes added or FALSE if the archive is finalized or there are no open stream.
376 */
377 public function addStreamData($data) {
378 if ($this->isFinalized || strlen($this->streamFilePath) == 0) {
379 return FALSE;
380 }
381
382 $length = fwrite($this->streamData, $data, strlen($data));
383 if ($length != strlen($data)) {
384 die ("<p>Length mismatch</p>\n");
385 }
386 $this->streamFileLength += $length;
387
388 return $length;
389 }
390
391 /**
392 * Close the current stream.
393 *
394 * @return bool $success
395 */
396 public function closeStream() {
397 if ($this->isFinalized || strlen($this->streamFilePath) == 0) {
398 return FALSE;
399 }
400
401 fflush($this->streamData);
402 fclose($this->streamData);
403
404 $this->processFile($this->streamFile, $this->streamFilePath, $this->streamTimestamp, $this->streamFileComment, $this->streamExtFileAttr);
405
406 $this->streamData = null;
407 $this->streamFilePath = null;
408 $this->streamTimestamp = null;
409 $this->streamFileComment = null;
410 $this->streamFileLength = 0;
411 $this->streamExtFileAttr = null;
412
413 // Windows is a little slow at times, so a millisecond later, we can unlink this.
414 unlink($this->streamFile);
415
416 $this->streamFile = null;
417
418 return TRUE;
419 }
420
421 private function processFile($dataFile, $filePath, $timestamp = 0, $fileComment = null, $extFileAttr = self::EXT_FILE_ATTR_FILE) {
422 if ($this->isFinalized) {
423 return FALSE;
424 }
425
426 $tempzip = tempnam(sys_get_temp_dir(), 'ZipStream');
427
428 $zip = new ZipArchive;
429 if ($zip->open($tempzip) === TRUE) {
430 $zip->addFile($dataFile, 'file');
431 $zip->close();
432 }
433
434 $file_handle = fopen($tempzip, "rb");
435 $stats = fstat($file_handle);
436 $eof = $stats['size']-72;
437
438 fseek($file_handle, 6);
439
440 $gpFlags = fread($file_handle, 2);
441 $gzType = fread($file_handle, 2);
442 fread($file_handle, 4);
443 $fileCRC32 = fread($file_handle, 4);
444 $v = unpack("Vval", fread($file_handle, 4));
445 $gzLength = $v['val'];
446 $v = unpack("Vval", fread($file_handle, 4));
447 $dataLength = $v['val'];
448
449 $this->buildZipEntry($filePath, $fileComment, $gpFlags, $gzType, $timestamp, $fileCRC32, $gzLength, $dataLength, $extFileAttr);
450
451 fseek($file_handle, 34);
452 $pos = 34;
453
454 while (!feof($file_handle) && $pos < $eof) {
455 $datalen = $this->streamChunkSize;
456 if ($pos + $this->streamChunkSize > $eof) {
457 $datalen = $eof-$pos;
458 }
459 $data = fread($file_handle, $datalen);
460 $pos += $datalen;
461
462 $this->zipwrite($data);
463 }
464
465 fclose($file_handle);
466
467 unlink($tempzip);
468 }
469
470 /**
471 * Close the archive.
472 * A closed archive can no longer have new files added to it.
473 *
474 * @return bool $success
475 */
476 public function finalize() {
477 if (!$this->isFinalized) {
478 if (strlen($this->streamFilePath) > 0) {
479 $this->closeStream();
480 }
481 $cd = implode("", $this->cdRec);
482
483 $cdRecSize = pack("v", sizeof($this->cdRec));
484 $cdRec = $cd . self::ZIP_END_OF_CENTRAL_DIRECTORY
485 . $cdRecSize . $cdRecSize
486 . pack("VV", strlen($cd), $this->offset);
487 if (!empty($this->zipComment)) {
488 $cdRec .= pack("v", strlen($this->zipComment)) . $this->zipComment;
489 } else {
490 $cdRec .= "\x00\x00";
491 }
492
493 $this->zipwrite($cdRec);
494
495 $this->isFinalized = TRUE;
496 $this->cdRec = NULL;
497
498 return TRUE;
499 }
500 return FALSE;
501 }
502
503 /**
504 * Get the handle ressource for the archive zip file.
505 * If the zip haven't been finalized yet, this will cause it to become finalized
506 *
507 * @return zip file handle
508 */
509 public function getZipFile() {
510 if (!$this->isFinalized) {
511 $this->finalize();
512 }
513
514 $this->zipflush();
515
516 rewind($this->zipFile);
517
518 return $this->zipFile;
519 }
520
521 /**
522 * Get the zip file contents
523 * If the zip haven't been finalized yet, this will cause it to become finalized
524 *
525 * @return zip data
526 */
527 public function getZipData() {
528 if (!$this->isFinalized) {
529 $this->finalize();
530 }
531 if (!is_resource($this->zipFile)) {
532 return $this->zipData;
533 } else {
534 rewind($this->zipFile);
535 $filestat = fstat($this->zipFile);
536 return fread($this->zipFile, $filestat['size']);
537 }
538 }
539
540 /**
541 * Send the archive as a zip download
542 *
543 * @param String $fileName The name of the Zip archive, in ISO-8859-1 (or ASCII) encoding, ie. "archive.zip". Optional, defaults to NULL, which means that no ISO-8859-1 encoded file name will be specified.
544 * @param String $contentType Content mime type. Optional, defaults to "application/zip".
545 * @param String $utf8FileName The name of the Zip archive, in UTF-8 encoding. Optional, defaults to NULL, which means that no UTF-8 encoded file name will be specified.
546 * @param bool $inline Use Content-Disposition with "inline" instead of "attached". Optional, defaults to FALSE.
547 * @return bool $success
548 */
549 function sendZip($fileName = null, $contentType = "application/zip", $utf8FileName = null, $inline = false) {
550 if (!$this->isFinalized) {
551 $this->finalize();
552 }
553
554 $headerFile = null;
555 $headerLine = null;
556 if (!headers_sent($headerFile, $headerLine) or die("<p><strong>Error:</strong> Unable to send file $fileName. HTML Headers have already been sent from <strong>$headerFile</strong> in line <strong>$headerLine</strong></p>")) {
557 if ((ob_get_contents() === FALSE || ob_get_contents() == '') or die("\n<p><strong>Error:</strong> Unable to send file <strong>$fileName</strong>. Output buffer contains the following text (typically warnings or errors):<br>" . htmlentities(ob_get_contents()) . "</p>")) {
558 if (ini_get('zlib.output_compression')) {
559 ini_set('zlib.output_compression', 'Off');
560 }
561
562 header("Pragma: public");
563 header("Last-Modified: " . gmdate("D, d M Y H:i:s T"));
564 header("Expires: 0");
565 header("Accept-Ranges: bytes");
566 header("Connection: close");
567 header("Content-Type: " . $contentType);
568 $cd = "Content-Disposition: ";
569 if ($inline) {
570 $cd .= "inline";
571 } else{
572 $cd .= "attached";
573 }
574 if ($fileName) {
575 $cd .= '; filename="' . $fileName . '"';
576 }
577 if ($utf8FileName) {
578 $cd .= "; filename*=UTF-8''" . rawurlencode($utf8FileName);
579 }
580 header($cd);
581 header("Content-Length: ". $this->getArchiveSize());
582
583 if (!is_resource($this->zipFile)) {
584 echo $this->zipData;
585 } else {
586 rewind($this->zipFile);
587
588 while (!feof($this->zipFile)) {
589 echo fread($this->zipFile, $this->streamChunkSize);
590 }
591 }
592 }
593 return TRUE;
594 }
595 return FALSE;
596 }
597
598 /**
599 * Return the current size of the archive
600 *
601 * @return $size Size of the archive
602 */
603 public function getArchiveSize() {
604 if (!is_resource($this->zipFile)) {
605 return strlen($this->zipData);
606 }
607 $filestat = fstat($this->zipFile);
608
609 return $filestat['size'];
610 }
611
612 /**
613 * Calculate the 2 byte dostime used in the zip entries.
614 *
615 * @param int $timestamp
616 * @return 2-byte encoded DOS Date
617 */
618 private function getDosTime($timestamp = 0) {
619 $timestamp = (int)$timestamp;
620 $oldTZ = @date_default_timezone_get();
621 date_default_timezone_set('UTC');
622 $date = ($timestamp == 0 ? getdate() : getdate($timestamp));
623 date_default_timezone_set($oldTZ);
624 if ($date["year"] >= 1980) {
625 return pack("V", (($date["mday"] + ($date["mon"] << 5) + (($date["year"]-1980) << 9)) << 16) |
626 (($date["seconds"] >> 1) + ($date["minutes"] << 5) + ($date["hours"] << 11)));
627 }
628 return "\x00\x00\x00\x00";
629 }
630
631 /**
632 * Build the Zip file structures
633 *
634 * @param string $filePath
635 * @param string $fileComment
636 * @param string $gpFlags
637 * @param string $gzType
638 * @param int $timestamp
639 * @param string $fileCRC32
640 * @param int $gzLength
641 * @param int $dataLength
642 * @param int $extFileAttr Use self::EXT_FILE_ATTR_FILE for files, self::EXT_FILE_ATTR_DIR for Directories.
643 */
644 private function buildZipEntry($filePath, $fileComment, $gpFlags, $gzType, $timestamp, $fileCRC32, $gzLength, $dataLength, $extFileAttr) {
645 $filePath = str_replace("\\", "/", $filePath);
646 $fileCommentLength = (empty($fileComment) ? 0 : strlen($fileComment));
647 $timestamp = (int)$timestamp;
648 $timestamp = ($timestamp == 0 ? time() : $timestamp);
649
650 $dosTime = $this->getDosTime($timestamp);
651 $tsPack = pack("V", $timestamp);
652
653 $ux = "\x75\x78\x0B\x00\x01\x04\xE8\x03\x00\x00\x04\x00\x00\x00\x00";
654
655 if (!isset($gpFlags) || strlen($gpFlags) != 2) {
656 $gpFlags = "\x00\x00";
657 }
658
659 $isFileUTF8 = mb_check_encoding($filePath, "UTF-8") && !mb_check_encoding($filePath, "ASCII");
660 $isCommentUTF8 = !empty($fileComment) && mb_check_encoding($fileComment, "UTF-8") && !mb_check_encoding($fileComment, "ASCII");
661 if ($isFileUTF8 || $isCommentUTF8) {
662 $flag = 0;
663 $gpFlagsV = unpack("vflags", $gpFlags);
664 if (isset($gpFlagsV['flags'])) {
665 $flag = $gpFlagsV['flags'];
666 }
667 $gpFlags = pack("v", $flag | (1 << 11));
668 }
669
670 $header = $gpFlags . $gzType . $dosTime. $fileCRC32
671 . pack("VVv", $gzLength, $dataLength, strlen($filePath)); // File name length
672
673 $zipEntry = self::ZIP_LOCAL_FILE_HEADER;
674 $zipEntry .= self::ATTR_VERSION_TO_EXTRACT;
675 $zipEntry .= $header;
676 $zipEntry .= pack("v", ($this->addExtraField ? 28 : 0)); // Extra field length
677 $zipEntry .= $filePath; // FileName
678 // Extra fields
679 if ($this->addExtraField) {
680 $zipEntry .= "\x55\x54\x09\x00\x03" . $tsPack . $tsPack . $ux;
681 }
682 $this->zipwrite($zipEntry);
683
684 $cdEntry = self::ZIP_CENTRAL_FILE_HEADER;
685 $cdEntry .= self::ATTR_MADE_BY_VERSION;
686 $cdEntry .= ($dataLength === 0 ? "\x0A\x00" : self::ATTR_VERSION_TO_EXTRACT);
687 $cdEntry .= $header;
688 $cdEntry .= pack("v", ($this->addExtraField ? 24 : 0)); // Extra field length
689 $cdEntry .= pack("v", $fileCommentLength); // File comment length
690 $cdEntry .= "\x00\x00"; // Disk number start
691 $cdEntry .= "\x00\x00"; // internal file attributes
692 $cdEntry .= pack("V", $extFileAttr); // External file attributes
693 $cdEntry .= pack("V", $this->offset); // Relative offset of local header
694 $cdEntry .= $filePath; // FileName
695 // Extra fields
696 if ($this->addExtraField) {
697 $cdEntry .= "\x55\x54\x05\x00\x03" . $tsPack . $ux;
698 }
699 if (!empty($fileComment)) {
700 $cdEntry .= $fileComment; // Comment
701 }
702
703 $this->cdRec[] = $cdEntry;
704 $this->offset += strlen($zipEntry) + $gzLength;
705 }
706
707 private function zipwrite($data) {
708 if (!is_resource($this->zipFile)) {
709 $this->zipData .= $data;
710 } else {
711 fwrite($this->zipFile, $data);
712 fflush($this->zipFile);
713 }
714 }
715
716 private function zipflush() {
717 if (!is_resource($this->zipFile)) {
718 $this->zipFile = tmpfile();
719 fwrite($this->zipFile, $this->zipData);
720 $this->zipData = NULL;
721 }
722 }
723
724 /**
725 * Join $file to $dir path, and clean up any excess slashes.
726 *
727 * @param string $dir
728 * @param string $file
729 */
730 public static function pathJoin($dir, $file) {
731 if (empty($dir) || empty($file)) {
732 return self::getRelativePath($dir . $file);
733 }
734 return self::getRelativePath($dir . '/' . $file);
735 }
736
737 /**
738 * Clean up a path, removing any unnecessary elements such as /./, // or redundant ../ segments.
739 * If the path starts with a "/", it is deemed an absolute path and any /../ in the beginning is stripped off.
740 * The returned path will not end in a "/".
741 *
742 * Sometimes, when a path is generated from multiple fragments,
743 * you can get something like "../data/html/../images/image.jpeg"
744 * This will normalize that example path to "../data/images/image.jpeg"
745 *
746 * @param string $path The path to clean up
747 * @return string the clean path
748 */
749 public static function getRelativePath($path) {
750 $path = preg_replace("#/+\.?/+#", "/", str_replace("\\", "/", $path));
751 $dirs = explode("/", rtrim(preg_replace('#^(?:\./)+#', '', $path), '/'));
752
753 $offset = 0;
754 $sub = 0;
755 $subOffset = 0;
756 $root = "";
757
758 if (empty($dirs[0])) {
759 $root = "/";
760 $dirs = array_splice($dirs, 1);
761 } else if (preg_match("#[A-Za-z]:#", $dirs[0])) {
762 $root = strtoupper($dirs[0]) . "/";
763 $dirs = array_splice($dirs, 1);
764 }
765
766 $newDirs = array();
767 foreach ($dirs as $dir) {
768 if ($dir !== "..") {
769 $subOffset--;
770 $newDirs[++$offset] = $dir;
771 } else {
772 $subOffset++;
773 if (--$offset < 0) {
774 $offset = 0;
775 if ($subOffset > $sub) {
776 $sub++;
777 }
778 }
779 }
780 }
781
782 if (empty($root)) {
783 $root = str_repeat("../", $sub);
784 }
785 return $root . implode("/", array_slice($newDirs, 0, $offset));
786 }
787
788 /**
789 * Create the file permissions for a file or directory, for use in the extFileAttr parameters.
790 *
791 * @param int $owner Unix permisions for owner (octal from 00 to 07)
792 * @param int $group Unix permisions for group (octal from 00 to 07)
793 * @param int $other Unix permisions for others (octal from 00 to 07)
794 * @param bool $isFile
795 * @return EXTRERNAL_REF field.
796 */
797 public static function generateExtAttr($owner = 07, $group = 05, $other = 05, $isFile = true) {
798 $fp = $isFile ? self::S_IFREG : self::S_IFDIR;
799 $fp |= (($owner & 07) << 6) | (($group & 07) << 3) | ($other & 07);
800
801 return ($fp << 16) | ($isFile ? self::S_DOS_A : self::S_DOS_D);
802 }
803
804 /**
805 * Get the file permissions for a file or directory, for use in the extFileAttr parameters.
806 *
807 * @param string $filename
808 * @return external ref field, or FALSE if the file is not found.
809 */
810 public static function getFileExtAttr($filename) {
811 if (file_exists($filename)) {
812 $fp = fileperms($filename) << 16;
813 return $fp | (is_dir($filename) ? self::S_DOS_D : self::S_DOS_A);
814 }
815 return FALSE;
816 }
817}
818?>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 22:25:38 +0000