function PclZip::privReadCentralFileHeader in Quiz 6.5

Same name and namespace in other branches

1. 6.6 includes/moodle/lib/pclzip/pclzip.lib.php \PclZip::privReadCentralFileHeader()

3 calls to PclZip::privReadCentralFileHeader()

PclZip::privDeleteByRule in includes/moodle/lib/pclzip/pclzip.lib.php

PclZip::privExtractByRule in includes/moodle/lib/pclzip/pclzip.lib.php

PclZip::privList in includes/moodle/lib/pclzip/pclzip.lib.php

File

includes/moodle/lib/pclzip/pclzip.lib.php, line 4207

Class

PclZip

Code

function privReadCentralFileHeader(&$p_header) {

  //--(MAGIC-PclTrace)--//PclTraceFctStart(__FILE__, __LINE__, "PclZip::privReadCentralFileHeader", "");
  $v_result = 1;

  // ----- Read the 4 bytes signature
  $v_binary_data = @fread($this->zip_fd, 4);

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 3, "Binary data is : '".sprintf("%08x", $v_binary_data)."'");
  $v_data = unpack('Vid', $v_binary_data);

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 3, "Binary signature is : '".sprintf("0x%08x", $v_data['id'])."'");

  // ----- Check signature
  if ($v_data['id'] != 0x2014b50) {

    //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 3, "Invalid Central Dir File signature");

    // ----- Error log
    PclZip::privErrorLog(PCLZIP_ERR_BAD_FORMAT, 'Invalid archive structure');

    // ----- Return

    //--(MAGIC-PclTrace)--//PclTraceFctEnd(__FILE__, __LINE__, PclZip::errorCode(), PclZip::errorInfo());
    return PclZip::errorCode();
  }

  // ----- Read the first 42 bytes of the header
  $v_binary_data = fread($this->zip_fd, 42);

  // ----- Look for invalid block size
  if (strlen($v_binary_data) != 42) {
    $p_header['filename'] = "";
    $p_header['status'] = "invalid_header";

    //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 2, "Invalid block size : ".strlen($v_binary_data));

    // ----- Error log
    PclZip::privErrorLog(PCLZIP_ERR_BAD_FORMAT, "Invalid block size : " . strlen($v_binary_data));

    // ----- Return

    //--(MAGIC-PclTrace)--//PclTraceFctEnd(__FILE__, __LINE__, PclZip::errorCode(), PclZip::errorInfo());
    return PclZip::errorCode();
  }

  // ----- Extract the values

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 5, "Header : '".$v_binary_data."'");

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 5, "Header (Hex) : '".bin2hex($v_binary_data)."'");
  $p_header = unpack('vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $v_binary_data);

  // ----- Get filename

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, "File name length : ".$p_header['filename_len']);
  if ($p_header['filename_len'] != 0) {
    $p_header['filename'] = fread($this->zip_fd, $p_header['filename_len']);
  }
  else {
    $p_header['filename'] = '';
  }

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Filename : \''.$p_header['filename'].'\'');

  // ----- Get extra

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, "Extra length : ".$p_header['extra_len']);
  if ($p_header['extra_len'] != 0) {
    $p_header['extra'] = fread($this->zip_fd, $p_header['extra_len']);
  }
  else {
    $p_header['extra'] = '';
  }

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Extra : \''.$p_header['extra'].'\'');

  // ----- Get comment

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, "Comment length : ".$p_header['comment_len']);
  if ($p_header['comment_len'] != 0) {
    $p_header['comment'] = fread($this->zip_fd, $p_header['comment_len']);
  }
  else {
    $p_header['comment'] = '';
  }

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Comment : \''.$p_header['comment'].'\'');

  // ----- Extract properties

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Version : \''.($p_header['version']/10).'.'.($p_header['version']%10).'\'');

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Version need to extract : \''.($p_header['version_extracted']/10).'.'.($p_header['version_extracted']%10).'\'');

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Size : \''.$p_header['size'].'\'');

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Compressed Size : \''.$p_header['compressed_size'].'\'');

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'CRC : \''.sprintf("0x%X", $p_header['crc']).'\'');

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Flag : \''.$p_header['flag'].'\'');

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Offset : \''.$p_header['offset'].'\'');

  // ----- Recuperate date in UNIX format
  if ($p_header['mdate'] && $p_header['mtime']) {

    // ----- Extract time
    $v_hour = ($p_header['mtime'] & 0xf800) >> 11;
    $v_minute = ($p_header['mtime'] & 0x7e0) >> 5;
    $v_seconde = ($p_header['mtime'] & 0x1f) * 2;

    // ----- Extract date
    $v_year = (($p_header['mdate'] & 0xfe00) >> 9) + 1980;
    $v_month = ($p_header['mdate'] & 0x1e0) >> 5;
    $v_day = $p_header['mdate'] & 0x1f;

    // ----- Get UNIX date format
    $p_header['mtime'] = mktime($v_hour, $v_minute, $v_seconde, $v_month, $v_day, $v_year);

    //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Date : \''.date("d/m/y H:i:s", $p_header['mtime']).'\'');
  }
  else {
    $p_header['mtime'] = time();

    //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Date is actual : \''.date("d/m/y H:i:s", $p_header['mtime']).'\'');
  }

  // ----- Set the stored filename
  $p_header['stored_filename'] = $p_header['filename'];

  // ----- Set default status to ok
  $p_header['status'] = 'ok';

  // ----- Look if it is a directory

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 5, "Internal (Hex) : '".sprintf("Ox%04X", $p_header['internal'])."'");

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, "External (Hex) : '".sprintf("Ox%04X", $p_header['external'])."' (".(($p_header['external']&0x00000010)==0x00000010?'is a folder':'is a file').')');
  if (substr($p_header['filename'], -1) == '/') {

    //$p_header['external'] = 0x41FF0010;
    $p_header['external'] = 0x10;

    //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 4, 'Force folder external : \''.sprintf("Ox%04X", $p_header['external']).'\'');
  }

  //--(MAGIC-PclTrace)--//PclTraceFctMessage(__FILE__, __LINE__, 3, 'Header of filename : \''.$p_header['filename'].'\'');

  // ----- Return

  //--(MAGIC-PclTrace)--//PclTraceFctEnd(__FILE__, __LINE__, $v_result);
  return $v_result;
}