1: <?php
2: /**
3: * PHPExcel
4: *
5: * Copyright (c) 2006 - 2014 PHPExcel
6: *
7: * This library is free software; you can redistribute it and/or
8: * modify it under the terms of the GNU Lesser General Public
9: * License as published by the Free Software Foundation; either
10: * version 2.1 of the License, or (at your option) any later version.
11: *
12: * This library is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15: * Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public
18: * License along with this library; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20: *
21: * @category PHPExcel
22: * @package PHPExcel_Shared
23: * @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
24: * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
25: * @version 1.8.0, 2014-03-02
26: */
27:
28:
29: /**
30: * PHPExcel_Shared_ZipStreamWrapper
31: *
32: * @category PHPExcel
33: * @package PHPExcel_Shared
34: * @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
35: */
36: class PHPExcel_Shared_ZipStreamWrapper {
37: /**
38: * Internal ZipAcrhive
39: *
40: * @var ZipAcrhive
41: */
42: private $_archive;
43:
44: /**
45: * Filename in ZipAcrhive
46: *
47: * @var string
48: */
49: private $_fileNameInArchive = '';
50:
51: /**
52: * Position in file
53: *
54: * @var int
55: */
56: private $_position = 0;
57:
58: /**
59: * Data
60: *
61: * @var mixed
62: */
63: private $_data = '';
64:
65: /**
66: * Register wrapper
67: */
68: public static function register() {
69: @stream_wrapper_unregister("zip");
70: @stream_wrapper_register("zip", __CLASS__);
71: }
72:
73: /**
74: * Implements support for fopen().
75: *
76: * @param string $path resource name including scheme, e.g.
77: * @param string $mode only "r" is supported
78: * @param int $options mask of STREAM_REPORT_ERRORS and STREAM_USE_PATH
79: * @param string &$openedPath absolute path of the opened stream (out parameter)
80: * @return bool true on success
81: */
82: public function stream_open($path, $mode, $options, &$opened_path) {
83: // Check for mode
84: if ($mode{0} != 'r') {
85: throw new PHPExcel_Reader_Exception('Mode ' . $mode . ' is not supported. Only read mode is supported.');
86: }
87:
88: $pos = strrpos($path, '#');
89: $url['host'] = substr($path, 6, $pos - 6); // 6: strlen('zip://')
90: $url['fragment'] = substr($path, $pos + 1);
91:
92: // Open archive
93: $this->_archive = new ZipArchive();
94: $this->_archive->open($url['host']);
95:
96: $this->_fileNameInArchive = $url['fragment'];
97: $this->_position = 0;
98: $this->_data = $this->_archive->getFromName( $this->_fileNameInArchive );
99:
100: return true;
101: }
102:
103: /**
104: * Implements support for fstat().
105: *
106: * @return boolean
107: */
108: public function statName() {
109: return $this->_fileNameInArchive;
110: }
111:
112: /**
113: * Implements support for fstat().
114: *
115: * @return boolean
116: */
117: public function url_stat() {
118: return $this->statName( $this->_fileNameInArchive );
119: }
120:
121: /**
122: * Implements support for fstat().
123: *
124: * @return boolean
125: */
126: public function stream_stat() {
127: return $this->_archive->statName( $this->_fileNameInArchive );
128: }
129:
130: /**
131: * Implements support for fread(), fgets() etc.
132: *
133: * @param int $count maximum number of bytes to read
134: * @return string
135: */
136: function stream_read($count) {
137: $ret = substr($this->_data, $this->_position, $count);
138: $this->_position += strlen($ret);
139: return $ret;
140: }
141:
142: /**
143: * Returns the position of the file pointer, i.e. its offset into the file
144: * stream. Implements support for ftell().
145: *
146: * @return int
147: */
148: public function stream_tell() {
149: return $this->_position;
150: }
151:
152: /**
153: * EOF stream
154: *
155: * @return bool
156: */
157: public function stream_eof() {
158: return $this->_position >= strlen($this->_data);
159: }
160:
161: /**
162: * Seek stream
163: *
164: * @param int $offset byte offset
165: * @param int $whence SEEK_SET, SEEK_CUR or SEEK_END
166: * @return bool
167: */
168: public function stream_seek($offset, $whence) {
169: switch ($whence) {
170: case SEEK_SET:
171: if ($offset < strlen($this->_data) && $offset >= 0) {
172: $this->_position = $offset;
173: return true;
174: } else {
175: return false;
176: }
177: break;
178:
179: case SEEK_CUR:
180: if ($offset >= 0) {
181: $this->_position += $offset;
182: return true;
183: } else {
184: return false;
185: }
186: break;
187:
188: case SEEK_END:
189: if (strlen($this->_data) + $offset >= 0) {
190: $this->_position = strlen($this->_data) + $offset;
191: return true;
192: } else {
193: return false;
194: }
195: break;
196:
197: default:
198: return false;
199: }
200: }
201: }
202: