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   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    ##VERSION##, ##DATE##
  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  }