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Nom du fichier : OMzip.php
Taille du fichier : 11 Ko (348 lignes)
Language : PHP
  1. span style="color: #808080; font-style: italic;">/**
  2.  * On-the-fly Zip file creation class.
  3.  * Makes and sends zip files without loading any file in RAM.
  4.  * 2 possibilities (mixable) :
  5.  *   - Use compression : the file will be sent after being gzcompressed
  6.  *     BUT file must be able to fit in RAM for a GZ+CRC32+substr run
  7.  *   - No compression : the file is directly sent : little RAM usage !
  8.  *     Time saving, and best reactivity
  9.  *     ZIP is not bigger when including photos or movies
  10.  * + High level API to calculate the size of the ZIP, create & send it on the fly
  11.  *   The download starts almost immediately, as there is no need to create the ZIP in advance
  12.  *
  13.  * Author/Copyright : Olivier MATHERET
  14.  *   matheret@free.fr  http://matheret.free.fr
  15.  * Licenced under CeCILL2
  16.  *
  17.  * Based on :
  18.  *
  19.  *  http://www.zend.com/codex.php?id=535&single=1
  20.  *  By Eric Mueller <eric@themepark.com>
  21.  *
  22.  *  http://www.zend.com/codex.php?id=470&single=1
  23.  *  by Denis125 <webmaster@atlant.ru>
  24.  *
  25.  *  a patch from Peter Listiak <mlady@users.sourceforge.net> for last modified
  26.  *  date and time of the compressed file
  27.  *
  28.  *  ConvertCharset.class.php from Mikolaj Jedrzejak <mikolajj@op.pl> + unicode.org tables
  29.  *  http://www.unicode.org  Unicode Homepage
  30.  *  http://www.mikkom.pl    Mikolaj Jedrzejak Homepage
  31.  *
  32.  *  Reverse CRC adapted from "Reversing CRC � Theory and Practice"
  33.  *  HU Berlin Public Report
  34.  *  Martin Stigge, Henryk Plotz, Wolf Muller, Jens-Peter Redlich
  35.  *
  36.  * Official ZIP file format: http://www.pkware.com/appnote.txt
  37.  *
  38.  * @access  public
  39. */'OMzip/OMcrc32.php''OMzip/ConvertCharset.class.php' );
  40.  
  41.  
  42.  
  43. /**
  44.  * Creates and sends a ZIP on the fly, with no compression (just great for Jpeg/Gif/Movies)
  45.  * VERY little RAM consumption, as the files never get loaded in RAM
  46.  * The download starts almost immediately, as the ZIP is not created before sending
  47.  *
  48.  * @param  name     name to give to the ZIP file
  49.  * @param  array    array of files to include
  50.  *
  51.  * @return integer  the size of the zip in bytes
  52.  *
  53.  * @access public
  54.  */'Content-length: '/**
  55.      * Size of compressed data
  56.      *
  57.      * @var  integer    $datalen
  58.      *//**
  59.      * Central directory
  60.      *
  61.      * @var  array    $ctrl_dir
  62.      *//**
  63.      * End of central directory record
  64.      *
  65.      * @var  string   $eof_ctrl_dir
  66.      */"\x50\x4b\x05\x06\x00\x00\x00\x00";
  67.  
  68.  
  69.     /**
  70.      * Constructor : send ZIP headers
  71.      *
  72.      * @param  string   archive name
  73.      * @param  integer  actually send the data ?
  74.      *
  75.      * @access private
  76.      */"archive.zip"// If you're having a problem with a file download script not working with IE
  77.             // if you call session_start() before sending the file, then try adding a
  78.             // session_cache_limiter() call before session_start().
  79. "Pragma: public"'Content-Description: File Transfer'"Cache-Control: must-revalidate, post-check=0, pre-check=0""Content-Transfer-Encoding: binary""Expires: 0""Last-Modified: ""D, d M Y H:i:s") . " GMT""Cache-Control: private"//header('Content-Type: application/force-download');
  80. "Content-type: application/zip""Content-disposition: attachment; filename=\"$name\""/**
  81.      * Converts an Unix timestamp to a four byte DOS date and time format (date
  82.      * in high two bytes, time in low two bytes allowing magnitude comparison).
  83.      *
  84.      * @param  integer  the current Unix timestamp
  85.      *
  86.      * @return integer  the current date in a four byte DOS format
  87.      *
  88.      * @access private
  89.      */'year''year''mon''mday''hours''minutes''seconds'] = 0;
  90.         } // end if
  91. 'year''mon''mday''hours''minutes''seconds'] >> 1);
  92.     } // end of the 'unix2DosTime()' method
  93.  
  94.  
  95.     /**
  96.      * Sends a file to stdout, using output control, megabyte per megabyte.
  97.      * Useful when readfile or passthru corrupt data, and supposed to be more efficient, but
  98.      * consumes PHP execution time.
  99.      *
  100.      * @param  string  file path
  101.      *
  102.      * @return boolean     success
  103.      *
  104.      * @access private
  105.      */// how many bytes per chunk
  106.         $buffer = '''rb'/**
  107.      * Adds file to archive
  108.      *
  109.      * @param  filename content file to add
  110.      * @param  string   name of the file in the archive (may contains the path)
  111.      * @param  boolean  whether or not to compress the data  CAUTION: file must fit in RAM if "true" !
  112.      * @param  integer  the current timestamp
  113.      *
  114.      * @return boolean  success of operations
  115.      *
  116.      * @access public
  117.      */'./', '''\\', '/', $name)) , "CP1252", "CP437"'./', '''\\', '/''\x''\x''\x''\x''$hexdtime = "''";');
  118.  
  119.         $fr1  = "\x50\x4b\x03\x04";
  120.         $fr1 .= "\x14\x00";    // ver needed to extract
  121.         $fr1 .= "\x00\x00";    // gen purpose bit flag
  122. "\x08\x00";                // compression method
  123. "\x00\x00";                // compression method
  124. // last mod time and date
  125. // "local file header" segment
  126. // fix crc bug
  127. // crc32 that reads byte per byte the file
  128. 'V', $crc);             // crc32
  129. 'V'// compressed filesize
  130. 'V'// uncompressed filesize
  131. 'v'// length of filename
  132. 'v', 0);                // extra field length
  133. // send this !
  134. // "file data" segment
  135. // now add to central directory record
  136.         $cdrec  ="\x50\x4b\x01\x02";
  137.         $cdrec .= "\x00\x00";                // version made by
  138.         $cdrec .= "\x14\x00";                // version needed to extract
  139.         $cdrec .= "\x00\x00";                // gen purpose bit flag
  140. "\x08\x00";                // compression method
  141. "\x00\x00";                // compression method
  142. // last mod time & date
  143. 'V', $crc);           // crc32
  144. 'V'// compressed filesize
  145. 'V'// uncompressed filesize
  146. 'v'// length of filename
  147. 'v', 0 );             // extra field length
  148. 'v', 0 );             // file comment length
  149. 'v', 0 );             // disk number start
  150. 'v', 0 );             // internal file attributes
  151. 'V', 32 );            // external file attributes - 'archive' bit set
  152. 'V'// optional extra field, file comment goes here
  153.         // save to central directory
  154. // end of the 'addFile()' method
  155.  
  156.  
  157.     /**
  158.      * Dumps out end of ZIP
  159.      *
  160.      * @access public
  161.      */'''v'// total # of entries "on this disk"
  162. 'v'// total # of entries overall
  163. 'V'// size of central dir
  164. 'V', $this -> datalen) .           // offset to start of central dir
  165.             "\x00\x00";                             // .zip file comment length
  166. // end of the 'file()' method
  167.  
  168. } // end of the 'zipfile' class
  169.  

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