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source: extensions/charlies_content/getid3/getid3/module.archive.zip.php @ 3318

Last change on this file since 3318 was 3318, checked in by vdigital, 15 years ago
+ Add Charlies' content to depository
Property svn:eol-style set to `LF` Property svn:keywords set to `Author Date Id Revision`
File size: 21.8 KB

Line
1	<?php
2	// +----------------------------------------------------------------------+
3	// \| PHP version 5 \|
4	// +----------------------------------------------------------------------+
5	// \| Copyright (c) 2002-2006 James Heinrich, Allan Hansen \|
6	// +----------------------------------------------------------------------+
7	// \| This source file is subject to version 2 of the GPL license, \|
8	// \| that is bundled with this package in the file license.txt and is \|
9	// \| available through the world-wide-web at the following url: \|
10	// \| http://www.gnu.org/copyleft/gpl.html \|
11	// +----------------------------------------------------------------------+
12	// \| getID3() - http://getid3.sourceforge.net or http://www.getid3.org \|
13	// +----------------------------------------------------------------------+
14	// \| Authors: James Heinrich <infoØgetid3*org> \|
15	// \| Allan Hansen <ahØartemis*dk> \|
16	// +----------------------------------------------------------------------+
17	// \| module.archive.zip.php \|
18	// \| Module for analyzing pkZip files \|
19	// \| dependencies: NONE \|
20	// +----------------------------------------------------------------------+
21	//
22	// $Id: module.archive.zip.php 3318 2009-05-20 21:54:10Z vdigital $
23
24
25
26	class getid3_zip extends getid3_handler
27	{
28
29	public function Analyze() {
30
31	$getid3 = $this->getid3;
32
33	$getid3->info['zip'] = array ();
34	$info_zip = &$getid3->info['zip'];
35
36	$getid3->info['fileformat'] = 'zip';
37
38	$info_zip['encoding'] = 'ISO-8859-1';
39	$info_zip['files'] = array ();
40	$info_zip['compressed_size'] = $info_zip['uncompressed_size'] = $info_zip['entries_count'] = 0;
41
42	$eocd_search_data = '';
43	$eocd_search_counter = 0;
44	while ($eocd_search_counter++ < 512) {
45
46	fseek($getid3->fp, -128 * $eocd_search_counter, SEEK_END);
47	$eocd_search_data = fread($getid3->fp, 128).$eocd_search_data;
48
49	if (strstr($eocd_search_data, 'PK'."\x05\x06")) {
50
51	$eocd_position = strpos($eocd_search_data, 'PK'."\x05\x06");
52	fseek($getid3->fp, (-128 * $eocd_search_counter) + $eocd_position, SEEK_END);
53	$info_zip['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory();
54
55	fseek($getid3->fp, $info_zip['end_central_directory']['directory_offset'], SEEK_SET);
56	$info_zip['entries_count'] = 0;
57	while ($central_directoryentry = $this->ZIPparseCentralDirectory($getid3->fp)) {
58	$info_zip['central_directory'][] = $central_directoryentry;
59	$info_zip['entries_count']++;
60	$info_zip['compressed_size'] += $central_directoryentry['compressed_size'];
61	$info_zip['uncompressed_size'] += $central_directoryentry['uncompressed_size'];
62
63	if ($central_directoryentry['uncompressed_size'] > 0) {
64	$info_zip['files'] = getid3_zip::array_merge_clobber($info_zip['files'], getid3_zip::CreateDeepArray($central_directoryentry['filename'], '/', $central_directoryentry['uncompressed_size']));
65	}
66	}
67
68	if ($info_zip['entries_count'] == 0) {
69	throw new getid3_exception('No Central Directory entries found (truncated file?)');
70	}
71
72	if (!empty($info_zip['end_central_directory']['comment'])) {
73	$info_zip['comments']['comment'][] = $info_zip['end_central_directory']['comment'];
74	}
75
76	if (isset($info_zip['central_directory'][0]['compression_method'])) {
77	$info_zip['compression_method'] = $info_zip['central_directory'][0]['compression_method'];
78	}
79	if (isset($info_zip['central_directory'][0]['flags']['compression_speed'])) {
80	$info_zip['compression_speed'] = $info_zip['central_directory'][0]['flags']['compression_speed'];
81	}
82	if (isset($info_zip['compression_method']) && ($info_zip['compression_method'] == 'store') && !isset($info_zip['compression_speed'])) {
83	$info_zip['compression_speed'] = 'store';
84	}
85
86	return true;
87	}
88	}
89
90	if ($this->getZIPentriesFilepointer()) {
91
92	// central directory couldn't be found and/or parsed
93	// scan through actual file data entries, recover as much as possible from probable trucated file
94	if (@$info_zip['compressed_size'] > ($getid3->info['filesize'] - 46 - 22)) {
95	throw new getid3_exception('Warning: Truncated file! - Total compressed file sizes ('.$info_zip['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($getid3->info['filesize'] - 46 - 22).' bytes)');
96	}
97	throw new getid3_exception('Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete');
98	}
99
100	//throw new getid3_exception('Cannot find End Of Central Directory (truncated file?)');
101	}
102
103
104
105	private function getZIPHeaderFilepointerTopDown() {
106
107	// shortcut
108	$getid3 = $this->getid3;
109
110	$getid3->info['fileformat'] = 'zip';
111
112	$getid3->info['zip'] = array ();
113	$info_zip['compressed_size'] = $info_zip['uncompressed_size'] = $info_zip['entries_count'] = 0;
114
115	rewind($getid3->fp);
116	while ($fileentry = $this->ZIPparseLocalFileHeader()) {
117	$info_zip['entries'][] = $fileentry;
118	$info_zip['entries_count']++;
119	}
120	if ($info_zip['entries_count'] == 0) {
121	throw new getid3_exception('No Local File Header entries found');
122	}
123
124	$info_zip['entries_count'] = 0;
125	while ($central_directoryentry = $this->ZIPparseCentralDirectory($getid3->fp)) {
126	$info_zip['central_directory'][] = $central_directoryentry;
127	$info_zip['entries_count']++;
128	$info_zip['compressed_size'] += $central_directoryentry['compressed_size'];
129	$info_zip['uncompressed_size'] += $central_directoryentry['uncompressed_size'];
130	}
131	if ($info_zip['entries_count'] == 0) {
132	throw new getid3_exception('No Central Directory entries found (truncated file?)');
133	}
134
135	if ($eocd = $this->ZIPparseEndOfCentralDirectory()) {
136	$info_zip['end_central_directory'] = $eocd;
137	} else {
138	throw new getid3_exception('No End Of Central Directory entry found (truncated file?)');
139	}
140
141	if (!@$info_zip['end_central_directory']['comment']) {
142	$info_zip['comments']['comment'][] = $info_zip['end_central_directory']['comment'];
143	}
144
145	return true;
146	}
147
148
149
150	private function getZIPentriesFilepointer() {
151
152	// shortcut
153	$getid3 = $this->getid3;
154
155	$getid3->info['zip'] = array ();
156	$info_zip['compressed_size'] = $info_zip['uncompressed_size'] = $info_zip['entries_count'] = 0;
157
158	rewind($getid3->fp);
159	while ($fileentry = $this->ZIPparseLocalFileHeader($getid3->fp)) {
160	$info_zip['entries'][] = $fileentry;
161	$info_zip['entries_count']++;
162	$info_zip['compressed_size'] += $fileentry['compressed_size'];
163	$info_zip['uncompressed_size'] += $fileentry['uncompressed_size'];
164	}
165	if ($info_zip['entries_count'] == 0) {
166	throw new getid3_exception('No Local File Header entries found');
167	}
168
169	return true;
170	}
171
172
173
174	private function ZIPparseLocalFileHeader() {
175
176	// shortcut
177	$getid3 = $this->getid3;
178
179	$local_file_header['offset'] = ftell($getid3->fp);
180
181	$zip_local_file_header = fread($getid3->fp, 30);
182
183	$local_file_header['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($zip_local_file_header, 0, 4));
184
185	// Invalid Local File Header Signature
186	if ($local_file_header['raw']['signature'] != 0x04034B50) {
187	fseek($getid3->fp, $local_file_header['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
188	return false;
189	}
190
191	getid3_lib::ReadSequence('LittleEndian2Int', $local_file_header['raw'], $zip_local_file_header, 4,
192	array (
193	'extract_version' => 2,
194	'general_flags' => 2,
195	'compression_method' => 2,
196	'last_mod_file_time' => 2,
197	'last_mod_file_date' => 2,
198	'crc_32' => 2,
199	'compressed_size' => 2,
200	'uncompressed_size' => 2,
201	'filename_length' => 2,
202	'extra_field_length' => 2
203	)
204	);
205
206	$local_file_header['extract_version'] = sprintf('%1.1f', $local_file_header['raw']['extract_version'] / 10);
207	$local_file_header['host_os'] = $this->ZIPversionOSLookup(($local_file_header['raw']['extract_version'] & 0xFF00) >> 8);
208	$local_file_header['compression_method'] = $this->ZIPcompressionMethodLookup($local_file_header['raw']['compression_method']);
209	$local_file_header['compressed_size'] = $local_file_header['raw']['compressed_size'];
210	$local_file_header['uncompressed_size'] = $local_file_header['raw']['uncompressed_size'];
211	$local_file_header['flags'] = $this->ZIPparseGeneralPurposeFlags($local_file_header['raw']['general_flags'], $local_file_header['raw']['compression_method']);
212	$local_file_header['last_modified_timestamp'] = $this->DOStime2UNIXtime($local_file_header['raw']['last_mod_file_date'], $local_file_header['raw']['last_mod_file_time']);
213
214	$filename_extra_field_length = $local_file_header['raw']['filename_length'] + $local_file_header['raw']['extra_field_length'];
215	if ($filename_extra_field_length > 0) {
216	$zip_local_file_header .= fread($getid3->fp, $filename_extra_field_length);
217
218	if ($local_file_header['raw']['filename_length'] > 0) {
219	$local_file_header['filename'] = substr($zip_local_file_header, 30, $local_file_header['raw']['filename_length']);
220	}
221	if ($local_file_header['raw']['extra_field_length'] > 0) {
222	$local_file_header['raw']['extra_field_data'] = substr($zip_local_file_header, 30 + $local_file_header['raw']['filename_length'], $local_file_header['raw']['extra_field_length']);
223	}
224	}
225
226	$local_file_header['data_offset'] = ftell($getid3->fp);
227	fseek($getid3->fp, $local_file_header['raw']['compressed_size'], SEEK_CUR);
228
229	if ($local_file_header['flags']['data_descriptor_used']) {
230	$data_descriptor = fread($getid3->fp, 12);
231
232	getid3_lib::ReadSequence('LittleEndian2Int', $local_file_header['data_descriptor'], $data_descriptor, 0,
233	array (
234	'crc_32' => 4,
235	'compressed_size' => 4,
236	'uncompressed_size' => 4
237	)
238	);
239	}
240
241	return $local_file_header;
242	}
243
244
245
246	private function ZIPparseCentralDirectory() {
247
248	// shortcut
249	$getid3 = $this->getid3;
250
251	$central_directory['offset'] = ftell($getid3->fp);
252
253	$zip_central_directory = fread($getid3->fp, 46);
254
255	$central_directory['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($zip_central_directory, 0, 4));
256
257	// invalid Central Directory Signature
258	if ($central_directory['raw']['signature'] != 0x02014B50) {
259	fseek($getid3->fp, $central_directory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
260	return false;
261	}
262
263	getid3_lib::ReadSequence('LittleEndian2Int', $central_directory['raw'], $zip_central_directory, 4,
264	array (
265	'create_version' => 2,
266	'extract_version' => 2,
267	'general_flags' => 2,
268	'compression_method' => 2,
269	'last_mod_file_time' => 2,
270	'last_mod_file_date' => 2,
271	'crc_32' => 4,
272	'compressed_size' => 4,
273	'uncompressed_size' => 4,
274	'filename_length' => 2,
275	'extra_field_length' => 2,
276	'file_comment_length' => 2,
277	'disk_number_start' => 2,
278	'internal_file_attrib' => 2,
279	'external_file_attrib' => 4,
280	'local_header_offset' => 4
281	)
282	);
283
284	$central_directory['entry_offset'] = $central_directory['raw']['local_header_offset'];
285	$central_directory['create_version'] = sprintf('%1.1f', $central_directory['raw']['create_version'] / 10);
286	$central_directory['extract_version'] = sprintf('%1.1f', $central_directory['raw']['extract_version'] / 10);
287	$central_directory['host_os'] = $this->ZIPversionOSLookup(($central_directory['raw']['extract_version'] & 0xFF00) >> 8);
288	$central_directory['compression_method'] = $this->ZIPcompressionMethodLookup($central_directory['raw']['compression_method']);
289	$central_directory['compressed_size'] = $central_directory['raw']['compressed_size'];
290	$central_directory['uncompressed_size'] = $central_directory['raw']['uncompressed_size'];
291	$central_directory['flags'] = $this->ZIPparseGeneralPurposeFlags($central_directory['raw']['general_flags'], $central_directory['raw']['compression_method']);
292	$central_directory['last_modified_timestamp'] = $this->DOStime2UNIXtime($central_directory['raw']['last_mod_file_date'], $central_directory['raw']['last_mod_file_time']);
293
294	$filename_extra_field_comment_length = $central_directory['raw']['filename_length'] + $central_directory['raw']['extra_field_length'] + $central_directory['raw']['file_comment_length'];
295	if ($filename_extra_field_comment_length > 0) {
296	$filename_extra_field_comment = fread($getid3->fp, $filename_extra_field_comment_length);
297
298	if ($central_directory['raw']['filename_length'] > 0) {
299	$central_directory['filename']= substr($filename_extra_field_comment, 0, $central_directory['raw']['filename_length']);
300	}
301	if ($central_directory['raw']['extra_field_length'] > 0) {
302	$central_directory['raw']['extra_field_data'] = substr($filename_extra_field_comment, $central_directory['raw']['filename_length'], $central_directory['raw']['extra_field_length']);
303	}
304	if ($central_directory['raw']['file_comment_length'] > 0) {
305	$central_directory['file_comment'] = substr($filename_extra_field_comment, $central_directory['raw']['filename_length'] + $central_directory['raw']['extra_field_length'], $central_directory['raw']['file_comment_length']);
306	}
307	}
308
309	return $central_directory;
310	}
311
312
313
314	private function ZIPparseEndOfCentralDirectory() {
315
316	// shortcut
317	$getid3 = $this->getid3;
318
319	$end_of_central_directory['offset'] = ftell($getid3->fp);
320
321	$zip_end_of_central_directory = fread($getid3->fp, 22);
322
323	$end_of_central_directory['signature'] = getid3_lib::LittleEndian2Int(substr($zip_end_of_central_directory, 0, 4));
324
325	// invalid End Of Central Directory Signature
326	if ($end_of_central_directory['signature'] != 0x06054B50) {
327	fseek($getid3->fp, $end_of_central_directory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
328	return false;
329	}
330
331	getid3_lib::ReadSequence('LittleEndian2Int', $end_of_central_directory, $zip_end_of_central_directory, 4,
332	array (
333	'disk_number_current' => 2,
334	'disk_number_start_directory' => 2,
335	'directory_entries_this_disk' => 2,
336	'directory_entries_total' => 2,
337	'directory_size' => 4,
338	'directory_offset' => 4,
339	'comment_length' => 2
340	)
341	);
342
343	if ($end_of_central_directory['comment_length'] > 0) {
344	$end_of_central_directory['comment'] = fread($getid3->fp, $end_of_central_directory['comment_length']);
345	}
346
347	return $end_of_central_directory;
348	}
349
350
351
352	public static function ZIPparseGeneralPurposeFlags($flag_bytes, $compression_method) {
353
354	$parsed_flags['encrypted'] = (bool)($flag_bytes & 0x0001);
355
356	switch ($compression_method) {
357	case 6:
358	$parsed_flags['dictionary_size'] = (($flag_bytes & 0x0002) ? 8192 : 4096);
359	$parsed_flags['shannon_fano_trees'] = (($flag_bytes & 0x0004) ? 3 : 2);
360	break;
361
362	case 8:
363	case 9:
364	switch (($flag_bytes & 0x0006) >> 1) {
365	case 0:
366	$parsed_flags['compression_speed'] = 'normal';
367	break;
368	case 1:
369	$parsed_flags['compression_speed'] = 'maximum';
370	break;
371	case 2:
372	$parsed_flags['compression_speed'] = 'fast';
373	break;
374	case 3:
375	$parsed_flags['compression_speed'] = 'superfast';
376	break;
377	}
378	break;
379	}
380	$parsed_flags['data_descriptor_used'] = (bool)($flag_bytes & 0x0008);
381
382	return $parsed_flags;
383	}
384
385
386
387	public static function ZIPversionOSLookup($index) {
388
389	static $lookup = array (
390	0 => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)',
391	1 => 'Amiga',
392	2 => 'OpenVMS',
393	3 => 'Unix',
394	4 => 'VM/CMS',
395	5 => 'Atari ST',
396	6 => 'OS/2 H.P.F.S.',
397	7 => 'Macintosh',
398	8 => 'Z-System',
399	9 => 'CP/M',
400	10 => 'Windows NTFS',
401	11 => 'MVS',
402	12 => 'VSE',
403	13 => 'Acorn Risc',
404	14 => 'VFAT',
405	15 => 'Alternate MVS',
406	16 => 'BeOS',
407	17 => 'Tandem'
408	);
409	return (isset($lookup[$index]) ? $lookup[$index] : '[unknown]');
410	}
411
412
413
414	public static function ZIPcompressionMethodLookup($index) {
415
416	static $lookup = array (
417	0 => 'store',
418	1 => 'shrink',
419	2 => 'reduce-1',
420	3 => 'reduce-2',
421	4 => 'reduce-3',
422	5 => 'reduce-4',
423	6 => 'implode',
424	7 => 'tokenize',
425	8 => 'deflate',
426	9 => 'deflate64',
427	10 => 'PKWARE Date Compression Library Imploding'
428	);
429	return (isset($lookup[$index]) ? $lookup[$index] : '[unknown]');
430	}
431
432
433
434	public static function DOStime2UNIXtime($DOSdate, $DOStime) {
435
436	/*
437	// wFatDate
438	// Specifies the MS-DOS date. The date is a packed 16-bit value with the following format:
439	// Bits Contents
440	// 0-4 Day of the month (1-31)
441	// 5-8 Month (1 = January, 2 = February, and so on)
442	// 9-15 Year offset from 1980 (add 1980 to get actual year)
443
444	$UNIXday = ($DOSdate & 0x001F);
445	$UNIXmonth = (($DOSdate & 0x01E0) >> 5);
446	$UNIXyear = (($DOSdate & 0xFE00) >> 9) + 1980;
447
448	// wFatTime
449	// Specifies the MS-DOS time. The time is a packed 16-bit value with the following format:
450	// Bits Contents
451	// 0-4 Second divided by 2
452	// 5-10 Minute (0-59)
453	// 11-15 Hour (0-23 on a 24-hour clock)
454
455	$UNIXsecond = ($DOStime & 0x001F) * 2;
456	$UNIXminute = (($DOStime & 0x07E0) >> 5);
457	$UNIXhour = (($DOStime & 0xF800) >> 11);
458
459	return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);
460	*/
461	return gmmktime(($DOStime & 0xF800) >> 11, ($DOStime & 0x07E0) >> 5, ($DOStime & 0x001F) * 2, ($DOSdate & 0x01E0) >> 5, $DOSdate & 0x001F, (($DOSdate & 0xFE00) >> 9) + 1980);
462	}
463
464
465
466	public static function array_merge_clobber($array1, $array2) {
467
468	// written by kcØhireability*com
469	// taken from http://www.php.net/manual/en/function.array-merge-recursive.php
470
471	if (!is_array($array1) \|\| !is_array($array2)) {
472	return false;
473	}
474
475	$newarray = $array1;
476	foreach ($array2 as $key => $val) {
477	if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
478	$newarray[$key] = getid3_zip::array_merge_clobber($newarray[$key], $val);
479	} else {
480	$newarray[$key] = $val;
481	}
482	}
483	return $newarray;
484	}
485
486
487
488	public static function CreateDeepArray($array_path, $separator, $value) {
489
490	// assigns $value to a nested array path:
491	// $foo = getid3_lib::CreateDeepArray('/path/to/my', '/', 'file.txt')
492	// is the same as:
493	// $foo = array ('path'=>array('to'=>'array('my'=>array('file.txt'))));
494	// or
495	// $foo['path']['to']['my'] = 'file.txt';
496
497	while ($array_path{0} == $separator) {
498	$array_path = substr($array_path, 1);
499	}
500	if (($pos = strpos($array_path, $separator)) !== false) {
501	return array (substr($array_path, 0, $pos) => getid3_zip::CreateDeepArray(substr($array_path, $pos + 1), $separator, $value));
502	}
503
504	return array ($array_path => $value);
505	}
506
507	}
508
509
510	?>

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