1 | <?php |
||
2 | // |
||
3 | /** |
||
4 | * package::i.tools |
||
5 | * |
||
6 | * php-downloader v1.0 - www.ipunkt.biz |
||
7 | * |
||
8 | * (c) 2002 - www.ipunkt.biz (rok) |
||
9 | * |
||
10 | * Zip file creation class. |
||
11 | * Makes zip files. |
||
12 | * |
||
13 | * Based on : |
||
14 | * |
||
15 | * https://www.zend.com/codex.php?id=535&single=1 |
||
16 | * By Eric Mueller <[email protected]> |
||
17 | * |
||
18 | * https://www.zend.com/codex.php?id=470&single=1 |
||
19 | * by Denis125 <[email protected]> |
||
20 | * |
||
21 | * a patch from Peter Listiak <[email protected]> for last modified |
||
22 | * date and time of the compressed file |
||
23 | * |
||
24 | * Official ZIP file format: http://www.pkware.com/appnote.txt |
||
25 | * |
||
26 | * @copyright (c) 2002 - www.ipunkt.biz (rok) |
||
27 | * @access public |
||
28 | * @package kernel |
||
29 | * @subpackage core |
||
30 | */ |
||
31 | class Zipfile |
||
32 | { |
||
33 | /** |
||
34 | * Array to store compressed data |
||
35 | * |
||
36 | * @var array $datasec |
||
37 | */ |
||
38 | public $datasec = array(); |
||
39 | |||
40 | /** |
||
41 | * Central directory |
||
42 | * |
||
43 | * @var array $ctrl_dir |
||
44 | */ |
||
45 | public $ctrl_dir = array(); |
||
46 | |||
47 | /** |
||
48 | * End of central directory record |
||
49 | * |
||
50 | * @var string $eof_ctrl_dir |
||
51 | */ |
||
52 | public $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00"; |
||
53 | |||
54 | /** |
||
55 | * Last offset position |
||
56 | * |
||
57 | * @var integer $old_offset |
||
58 | */ |
||
59 | public $old_offset = 0; |
||
60 | |||
61 | /** |
||
62 | * Converts an Unix timestamp to a four byte DOS date and time format (date |
||
63 | * in high two bytes, time in low two bytes allowing magnitude comparison). |
||
64 | * |
||
65 | * @param int $unixtime the current Unix timestamp |
||
66 | * |
||
67 | * @return integer the current date in a four byte DOS format |
||
68 | * @access private |
||
69 | */ |
||
70 | public function unix2DosTime($unixtime = 0) |
||
71 | { |
||
72 | $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime); |
||
73 | if ($timearray['year'] < 1980) { |
||
74 | $timearray['year'] = 1980; |
||
75 | $timearray['mon'] = 1; |
||
76 | $timearray['mday'] = 1; |
||
77 | $timearray['hours'] = 0; |
||
78 | $timearray['minutes'] = 0; |
||
79 | $timearray['seconds'] = 0; |
||
80 | } // end if |
||
81 | |||
82 | return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1); |
||
83 | } // end of the 'unix2DosTime()' method |
||
84 | |||
85 | /** |
||
86 | * Adds "file" to archive |
||
87 | * |
||
88 | * @param string $data file contents |
||
89 | * @param string $name name of the file in the archive (may contains the path) |
||
90 | * @param integer $time the current timestamp |
||
91 | * @access public |
||
92 | */ |
||
93 | public function addFile($data, $name, $time = 0) |
||
94 | { |
||
95 | $name = str_replace('\\', '/', $name); |
||
96 | |||
97 | $dtime = dechex($this->unix2DosTime($time)); |
||
98 | $hexdtime = '\x' . $dtime[6] . $dtime[7] . '\x' . $dtime[4] . $dtime[5] . '\x' . $dtime[2] . $dtime[3] . '\x' . $dtime[0] . $dtime[1]; |
||
99 | eval('$hexdtime = "' . $hexdtime . '";'); |
||
0 ignored issues
–
show
introduced
by
Loading history...
|
|||
100 | |||
101 | $fr = "\x50\x4b\x03\x04"; |
||
102 | $fr .= "\x14\x00"; // ver needed to extract |
||
103 | $fr .= "\x00\x00"; // gen purpose bit flag |
||
104 | $fr .= "\x08\x00"; // compression method |
||
105 | $fr .= $hexdtime; // last mod time and date |
||
106 | // "local file header" segment |
||
107 | $unc_len = strlen($data); |
||
108 | $crc = crc32($data); |
||
109 | $zdata = gzcompress($data); |
||
110 | $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug |
||
111 | $c_len = strlen($zdata); |
||
112 | $fr .= pack('V', $crc); // crc32 |
||
113 | $fr .= pack('V', $c_len); // compressed filesize |
||
114 | $fr .= pack('V', $unc_len); // uncompressed filesize |
||
115 | $fr .= pack('v', strlen($name)); // length of filename |
||
116 | $fr .= pack('v', 0); // extra field length |
||
117 | $fr .= $name; |
||
118 | // "file data" segment |
||
119 | $fr .= $zdata; |
||
120 | // "data descriptor" segment (optional but necessary if archive is not |
||
121 | // served as file) |
||
122 | $fr .= pack('V', $crc); // crc32 |
||
123 | $fr .= pack('V', $c_len); // compressed filesize |
||
124 | $fr .= pack('V', $unc_len); // uncompressed filesize |
||
125 | // add this entry to array |
||
126 | $this->datasec[] = $fr; |
||
127 | $new_offset = strlen(implode('', $this->datasec)); |
||
128 | // now add to central directory record |
||
129 | $cdrec = "\x50\x4b\x01\x02"; |
||
130 | $cdrec .= "\x00\x00"; // version made by |
||
131 | $cdrec .= "\x14\x00"; // version needed to extract |
||
132 | $cdrec .= "\x00\x00"; // gen purpose bit flag |
||
133 | $cdrec .= "\x08\x00"; // compression method |
||
134 | $cdrec .= $hexdtime; // last mod time & date |
||
135 | $cdrec .= pack('V', $crc); // crc32 |
||
136 | $cdrec .= pack('V', $c_len); // compressed filesize |
||
137 | $cdrec .= pack('V', $unc_len); // uncompressed filesize |
||
138 | $cdrec .= pack('v', strlen($name)); // length of filename |
||
139 | $cdrec .= pack('v', 0); // extra field length |
||
140 | $cdrec .= pack('v', 0); // file comment length |
||
141 | $cdrec .= pack('v', 0); // disk number start |
||
142 | $cdrec .= pack('v', 0); // internal file attributes |
||
143 | $cdrec .= pack('V', 32); // external file attributes - 'archive' bit set |
||
144 | $cdrec .= pack('V', $this->old_offset); // relative offset of local header |
||
145 | $this->old_offset = $new_offset; |
||
146 | $cdrec .= $name; |
||
147 | // optional extra field, file comment goes here |
||
148 | // save to central directory |
||
149 | $this->ctrl_dir[] = $cdrec; |
||
150 | } // end of the 'addFile()' method |
||
151 | |||
152 | /** |
||
153 | * Dumps out file |
||
154 | * |
||
155 | * @return string the zipped file |
||
156 | * @access public |
||
157 | */ |
||
158 | public function file() |
||
159 | { |
||
160 | $data = implode('', $this->datasec); |
||
161 | $ctrldir = implode('', $this->ctrl_dir); |
||
162 | |||
163 | return $data . $ctrldir . $this->eof_ctrl_dir . pack('v', count($this->ctrl_dir)) . // total # of entries "on this disk" |
||
164 | pack('v', count($this->ctrl_dir)) . // total # of entries overall |
||
165 | pack('V', strlen($ctrldir)) . // size of central dir |
||
166 | pack('V', strlen($data)) . // offset to start of central dir |
||
167 | "\x00\x00"; // .zip file comment length |
||
168 | } // end of the 'file()' method |
||
169 | } // end of the 'zipfile' class |
||
170 | |||
171 |