libraries/zip_extension.lib.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Interface for the zip extension
   5  *
   6  * @package PhpMyAdmin
   7  */
   8 if (! defined('PHPMYADMIN')) {
   9     exit;
  10 }
  11
  12 /**
  13  * Gets zip file contents
  14  *
  15  * @param string $file           zip file
  16  * @param string $specific_entry regular expression to match a file
  17  *
  18  * @return array ($error_message, $file_data); $error_message
  19  *                  is empty if no error
  20  */
  21 function PMA_getZipContents($file, $specific_entry = null)
  22 {
  23     $error_message = '';
  24     $file_data = '';
  25     $zip_handle = zip_open($file);
  26     if (!is_resource($zip_handle)) {
  27         $error_message = __('Error in ZIP archive:')
  28             . ' ' . PMA_getZipError($zip_handle);
  29         return (array('error' => $error_message, 'data' => $file_data));
  30     }
  31
  32     $first_zip_entry = zip_read($zip_handle);
  33     if (false === $first_zip_entry) {
  34         $error_message = __('No files found inside ZIP archive!');
  35         zip_close($zip_handle);
  36         return (array('error' => $error_message, 'data' => $file_data));
  37     }
  38
  39     /* Is the the zip really an ODS file? */
  40     $read = zip_entry_read($first_zip_entry);
  41     $ods_mime = 'application/vnd.oasis.opendocument.spreadsheet';
  42     if (!strcmp($ods_mime, $read)) {
  43         $specific_entry = '/^content\.xml$/';
  44     }
  45
  46     if (!isset($specific_entry)) {
  47         zip_entry_open($zip_handle, $first_zip_entry, 'r');
  48         /* File pointer has already been moved,
  49          * so include what was read above */
  50         $file_data = $read;
  51         $file_data .= zip_entry_read(
  52             $first_zip_entry,
  53             zip_entry_filesize($first_zip_entry)
  54         );
  55         zip_entry_close($first_zip_entry);
  56         zip_close($zip_handle);
  57         return (array('error' => $error_message, 'data' => $file_data));
  58     }
  59
  60     /* Return the correct contents, not just the first entry */
  61     for ( ; ; ) {
  62         $entry = zip_read($zip_handle);
  63         if (is_resource($entry)) {
  64             if (preg_match($specific_entry, zip_entry_name($entry))) {
  65                 zip_entry_open($zip_handle, $entry, 'r');
  66                 $file_data = zip_entry_read(
  67                     $entry,
  68                     zip_entry_filesize($entry)
  69                 );
  70                 zip_entry_close($entry);
  71                 break;
  72             }
  73         } else {
  74             /**
  75              * Either we have reached the end of the zip and still
  76              * haven't found $specific_entry or there was a parsing
  77              * error that we must display
  78              */
  79             if ($entry === false) {
  80                 $error_message = __('Error in ZIP archive:')
  81                     . ' Could not find "' . $specific_entry . '"';
  82             } else {
  83                 $error_message = __('Error in ZIP archive:')
  84                     . ' ' . PMA_getZipError($zip_handle);
  85             }
  86
  87             break;
  88         }
  89     }
  90
  91     zip_close($zip_handle);
  92     return (array('error' => $error_message, 'data' => $file_data));
  93 }
  94
  95 /**
  96  * Returns the file name of the first file that matches the given $file_regexp.
  97  *
  98  * @param string $file_regexp regular expression for the file name to match
  99  * @param string $file        zip archive
 100  *
 101  * @return string the file name of the first file that matches the given regexp
 102  */
 103 function PMA_findFileFromZipArchive($file_regexp, $file)
 104 {
 105     $zip_handle = zip_open($file);
 106     if (is_resource($zip_handle)) {
 107         $entry = zip_read($zip_handle);
 108         while (is_resource($entry)) {
 109             if (preg_match($file_regexp, zip_entry_name($entry))) {
 110                 $file_name = zip_entry_name($entry);
 111                 zip_close($zip_handle);
 112                 return $file_name;
 113             }
 114             $entry = zip_read($zip_handle);
 115         }
 116     }
 117     zip_close($zip_handle);
 118     return false;
 119 }
 120
 121 /**
 122  * Returns the number of files in the zip archive.
 123  *
 124  * @param string $file zip archive
 125  *
 126  * @return int the number of files in the zip archive
 127  */
 128 function PMA_getNoOfFilesInZip($file)
 129 {
 130     $count = 0;
 131     $zip_handle = zip_open($file);
 132     if (is_resource($zip_handle)) {
 133         $entry = zip_read($zip_handle);
 134         while (is_resource($entry)) {
 135             $count++;
 136             $entry = zip_read($zip_handle);
 137         }
 138         zip_close($zip_handle);
 139     }
 140     return $count;
 141 }
 142
 143 /**
 144  * Extracts a set of files from the given zip archive to a given destinations.
 145  *
 146  * @param string $zip_path path to the zip archive
 147  * @param string $entry    file in the archive that should be extracted
 148  *
 149  * @return string|bool data on sucess, false otherwise
 150  */
 151 function PMA_zipExtract($zip_path, $entry)
 152 {
 153     $zip = new ZipArchive;
 154     if ($zip->open($zip_path) === true) {
 155         $result = $zip->getFromName($entry);
 156         $zip->close();
 157         return $result;
 158     }
 159     return false;
 160 }
 161
 162 /**
 163   * Gets zip error message
 164   *
 165   * @param resource $code error code
 166   *
 167   * @return string error message
 168  */
 169 function PMA_getZipError($code)
 170 {
 171     // I don't think this needs translation
 172     switch ($code) {
 173     case ZIPARCHIVE::ER_MULTIDISK:
 174         $message = 'Multi-disk zip archives not supported';
 175         break;
 176     case ZIPARCHIVE::ER_READ:
 177         $message = 'Read error';
 178         break;
 179     case ZIPARCHIVE::ER_CRC:
 180         $message = 'CRC error';
 181         break;
 182     case ZIPARCHIVE::ER_NOZIP:
 183         $message = 'Not a zip archive';
 184         break;
 185     case ZIPARCHIVE::ER_INCONS:
 186         $message = 'Zip archive inconsistent';
 187         break;
 188     default:
 189         $message = $code;
 190     }
 191     return $message;
 192 }