ILIAS  release_5-0 Revision 5.0.0-1144-gc4397b1f870
Public Member Functions | Data Fields
getid3_gzip Class Reference

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g // More...

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Public Member Functions

 getid3_gzip (&$fd, &$ThisFileInfo)
 
 get_os_type ($key)
 
 get_xflag_type ($key)
 

Data Fields

 $option_gzip_parse_contents = false
 

Detailed Description

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //

Definition at line 17 of file module.archive.gzip.php.

Member Function Documentation

◆ get_os_type()

getid3_gzip::get_os_type (   $key)

Definition at line 217 of file module.archive.gzip.php.

217 {
218 static $os_type = array(
219 '0' => 'FAT filesystem (MS-DOS, OS/2, NT/Win32)',
220 '1' => 'Amiga',
221 '2' => 'VMS (or OpenVMS)',
222 '3' => 'Unix',
223 '4' => 'VM/CMS',
224 '5' => 'Atari TOS',
225 '6' => 'HPFS filesystem (OS/2, NT)',
226 '7' => 'Macintosh',
227 '8' => 'Z-System',
228 '9' => 'CP/M',
229 '10' => 'TOPS-20',
230 '11' => 'NTFS filesystem (NT)',
231 '12' => 'QDOS',
232 '13' => 'Acorn RISCOS',
233 '255' => 'unknown'
234 );
235 return @$os_type[$key];
236 }

Referenced by getid3_gzip().

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◆ get_xflag_type()

getid3_gzip::get_xflag_type (   $key)

Definition at line 239 of file module.archive.gzip.php.

239 {
240 static $xflag_type = array(
241 '0' => 'unknown',
242 '2' => 'maximum compression',
243 '4' => 'fastest algorithm'
244 );
245 return @$xflag_type[$key];
246 }

Referenced by getid3_gzip().

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◆ getid3_gzip()

getid3_gzip::getid3_gzip ( &  $fd,
&  $ThisFileInfo 
)

Definition at line 22 of file module.archive.gzip.php.

22 {
23 $ThisFileInfo['fileformat'] = 'gzip';
24
25 $start_length = 10;
26 $unpack_header = 'a1id1/a1id2/a1cmethod/a1flags/a4mtime/a1xflags/a1os';
27 //+---+---+---+---+---+---+---+---+---+---+
28 //|ID1|ID2|CM |FLG| MTIME |XFL|OS |
29 //+---+---+---+---+---+---+---+---+---+---+
30 @fseek($fd, 0);
31 $buffer = @fread($fd, $ThisFileInfo['filesize']);
32
33 $arr_members = explode("\x1F\x8B\x08", $buffer);
34 while (true) {
35 $is_wrong_members = false;
36 $num_members = intval(count($arr_members));
37 for ($i = 0; $i < $num_members; $i++) {
38 if (strlen($arr_members[$i]) == 0) {
39 continue;
40 }
41 $buf = "\x1F\x8B\x08".$arr_members[$i];
42
43 $attr = unpack($unpack_header, substr($buf, 0, $start_length));
44 if (!$this->get_os_type(ord($attr['os']))) {
45 // Merge member with previous if wrong OS type
46 $arr_members[$i - 1] .= $buf;
47 $arr_members[$i] = '';
48 $is_wrong_members = true;
49 continue;
50 }
51 }
52 if (!$is_wrong_members) {
53 break;
54 }
55 }
56
57 $ThisFileInfo['gzip']['files'] = array();
58
59 $fpointer = 0;
60 $idx = 0;
61 for ($i = 0; $i < $num_members; $i++) {
62 if (strlen($arr_members[$i]) == 0) {
63 continue;
64 }
65 $thisThisFileInfo = &$ThisFileInfo['gzip']['member_header'][++$idx];
66
67 $buff = "\x1F\x8B\x08".$arr_members[$i];
68
69 $attr = unpack($unpack_header, substr($buff, 0, $start_length));
70 $thisThisFileInfo['filemtime'] = getid3_lib::LittleEndian2Int($attr['mtime']);
71 $thisThisFileInfo['raw']['id1'] = ord($attr['cmethod']);
72 $thisThisFileInfo['raw']['id2'] = ord($attr['cmethod']);
73 $thisThisFileInfo['raw']['cmethod'] = ord($attr['cmethod']);
74 $thisThisFileInfo['raw']['os'] = ord($attr['os']);
75 $thisThisFileInfo['raw']['xflags'] = ord($attr['xflags']);
76 $thisThisFileInfo['raw']['flags'] = ord($attr['flags']);
77
78 $thisThisFileInfo['flags']['crc16'] = (bool) ($thisThisFileInfo['raw']['flags'] & 0x02);
79 $thisThisFileInfo['flags']['extra'] = (bool) ($thisThisFileInfo['raw']['flags'] & 0x04);
80 $thisThisFileInfo['flags']['filename'] = (bool) ($thisThisFileInfo['raw']['flags'] & 0x08);
81 $thisThisFileInfo['flags']['comment'] = (bool) ($thisThisFileInfo['raw']['flags'] & 0x10);
82
83 $thisThisFileInfo['compression'] = $this->get_xflag_type($thisThisFileInfo['raw']['xflags']);
84
85 $thisThisFileInfo['os'] = $this->get_os_type($thisThisFileInfo['raw']['os']);
86 if (!$thisThisFileInfo['os']) {
87 $ThisFileInfo['error'][] = 'Read error on gzip file';
88 return false;
89 }
90
91 $fpointer = 10;
92 $arr_xsubfield = array();
93 // bit 2 - FLG.FEXTRA
94 //+---+---+=================================+
95 //| XLEN |...XLEN bytes of "extra field"...|
96 //+---+---+=================================+
97 if ($thisThisFileInfo['flags']['extra']) {
98 $w_xlen = substr($buff, $fpointer, 2);
99 $xlen = getid3_lib::LittleEndian2Int($w_xlen);
100 $fpointer += 2;
101
102 $thisThisFileInfo['raw']['xfield'] = substr($buff, $fpointer, $xlen);
103 // Extra SubFields
104 //+---+---+---+---+==================================+
105 //|SI1|SI2| LEN |... LEN bytes of subfield data ...|
106 //+---+---+---+---+==================================+
107 $idx = 0;
108 while (true) {
109 if ($idx >= $xlen) {
110 break;
111 }
112 $si1 = ord(substr($buff, $fpointer + $idx++, 1));
113 $si2 = ord(substr($buff, $fpointer + $idx++, 1));
114 if (($si1 == 0x41) && ($si2 == 0x70)) {
115 $w_xsublen = substr($buff, $fpointer+$idx, 2);
116 $xsublen = getid3_lib::LittleEndian2Int($w_xsublen);
117 $idx += 2;
118 $arr_xsubfield[] = substr($buff, $fpointer+$idx, $xsublen);
119 $idx += $xsublen;
120 } else {
121 break;
122 }
123 }
124 $fpointer += $xlen;
125 }
126 // bit 3 - FLG.FNAME
127 //+=========================================+
128 //|...original file name, zero-terminated...|
129 //+=========================================+
130 // GZIP files may have only one file, with no filename, so assume original filename is current filename without .gz
131 $thisThisFileInfo['filename'] = eregi_replace('.gz$', '', $ThisFileInfo['filename']);
132 if ($thisThisFileInfo['flags']['filename']) {
133 while (true) {
134 if (ord($buff[$fpointer]) == 0) {
135 $fpointer++;
136 break;
137 }
138 $thisThisFileInfo['filename'] .= $buff[$fpointer];
139 $fpointer++;
140 }
141 }
142 // bit 4 - FLG.FCOMMENT
143 //+===================================+
144 //|...file comment, zero-terminated...|
145 //+===================================+
146 if ($thisThisFileInfo['flags']['comment']) {
147 while (true) {
148 if (ord($buff[$fpointer]) == 0) {
149 $fpointer++;
150 break;
151 }
152 $thisThisFileInfo['comment'] .= $buff[$fpointer];
153 $fpointer++;
154 }
155 }
156 // bit 1 - FLG.FHCRC
157 //+---+---+
158 //| CRC16 |
159 //+---+---+
160 if ($thisThisFileInfo['flags']['crc16']) {
161 $w_crc = substr($buff, $fpointer, 2);
162 $thisThisFileInfo['crc16'] = getid3_lib::LittleEndian2Int($w_crc);
163 $fpointer += 2;
164 }
165 // bit 0 - FLG.FTEXT
166 //if ($thisThisFileInfo['raw']['flags'] & 0x01) {
167 // Ignored...
168 //}
169 // bits 5, 6, 7 - reserved
170
171 $thisThisFileInfo['crc32'] = getid3_lib::LittleEndian2Int(substr($buff, strlen($buff) - 8, 4));
172 $thisThisFileInfo['filesize'] = getid3_lib::LittleEndian2Int(substr($buff, strlen($buff) - 4));
173
174 $ThisFileInfo['gzip']['files'] = getid3_lib::array_merge_clobber($ThisFileInfo['gzip']['files'], getid3_lib::CreateDeepArray($thisThisFileInfo['filename'], '/', $thisThisFileInfo['filesize']));
175
176 if ($this->option_gzip_parse_contents) {
177 // Try to inflate GZip
178 $csize = 0;
179 $inflated = '';
180 $chkcrc32 = '';
181 if (function_exists('gzinflate')) {
182 $cdata = substr($buff, $fpointer);
183 $cdata = substr($cdata, 0, strlen($cdata) - 8);
184 $csize = strlen($cdata);
185 $inflated = gzinflate($cdata);
186
187 // Calculate CRC32 for inflated content
188 $thisThisFileInfo['crc32_valid'] = (bool) (sprintf('%u', crc32($inflated)) == $thisThisFileInfo['crc32']);
189
190 // determine format
191 $formattest = substr($inflated, 0, 32774);
192 $newgetID3 = new getID3();
193 $determined_format = $newgetID3->GetFileFormat($formattest);
194 unset($newgetID3);
195
196 // file format is determined
197 switch (@$determined_format['module']) {
198 case 'tar':
199 // view TAR-file info
200 if (file_exists(GETID3_INCLUDEPATH.$determined_format['include']) && @include_once(GETID3_INCLUDEPATH.$determined_format['include'])) {
201 getid3_tar::read_tar($inflated, $ThisFileInfo['gzip']['member_header'][$idx]);
202 }
203 break;
204
205 case '':
206 default:
207 // unknown or unhandled format
208 break;
209 }
210 }
211 }
212 }
213 return true;
214 }
getid3_gzip\get_os_type
get_os_type($key)
Definition: module.archive.gzip.php:217
getid3_gzip\get_xflag_type
get_xflag_type($key)
Definition: module.archive.gzip.php:239
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_lib\CreateDeepArray
CreateDeepArray($ArrayPath, $Separator, $Value)
Definition: getid3.lib.php:465
getid3_lib\array_merge_clobber
array_merge_clobber($array1, $array2)
Definition: getid3.lib.php:358

References getid3_lib\array_merge_clobber(), getid3_lib\CreateDeepArray(), get_os_type(), get_xflag_type(), and getid3_lib\LittleEndian2Int().

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Field Documentation

◆ $option_gzip_parse_contents

getid3_gzip::$option_gzip_parse_contents = false

Definition at line 20 of file module.archive.gzip.php.

The documentation for this class was generated from the following file: