private function _readEndCentralDir(&$arCentralDir)
{
$res = 1;
//going to the end of the file
$size = filesize($this->io->GetPhysicalName($this->zipname));
@fseek($this->zipfile, $size);
if (@ftell($this->zipfile) != $size) {
$this->_errorLog("ERR_ARC_END", str_replace("#FILE_NAME#", removeDocRoot($this->zipname), GetMessage("MAIN_ZIP_ERR_ARC_END")));
return $this->arErrors;
}
//if archive is without comments (usually), the end of central dir is at 22 bytes of the file end
$isFound = 0;
$pos = 0;
if ($size > 26) {
@fseek($this->zipfile, $size - 22);
if (($pos = @ftell($this->zipfile)) != $size - 22) {
$this->_errorLog("ERR_ARC_MID", str_replace("#FILE_NAME#", removeDocRoot($this->zipname), GetMessage("MAIN_ZIP_ERR_ARC_MID")));
return $this->arErrors;
}
//read 4 bytes
$binary_data = @fread($this->zipfile, 4);
$data = unpack('Vid', $binary_data);
//signature check
if ($data['id'] == 0x6054b50) {
$isFound = 1;
}
$pos = ftell($this->zipfile);
}
//going back to the max possible size of the Central Dir End Record
if (!$isFound) {
$maxSize = 65557;
// 0xFFFF + 22;
if ($maxSize > $size) {
$maxSize = $size;
}
@fseek($this->zipfile, $size - $maxSize);
if (@ftell($this->zipfile) != $size - $maxSize) {
$this->_errorLog("ERR_ARC_MID", str_replace("#FILE_NAME#", removeDocRoot($this->zipname), GetMessage("MAIN_ZIP_ERR_ARC_MID")));
return $this->arErrors;
}
//reading byte per byte to find the signature
$pos = ftell($this->zipfile);
$bytes = 0x0;
while ($pos < $size) {
//reading 1 byte
$byte = @fread($this->zipfile, 1);
//adding the byte
$bytes = $bytes << 8 | ord($byte);
//compare bytes
if ($bytes == 0x504b0506) {
$pos++;
break;
}
$pos++;
}
//if end of the central dir is not found
if ($pos == $size) {
$this->_errorLog("ERR_ARC_MID_END", GetMessage("MAIN_ZIP_ERR_ARC_MID_END"));
return $this->arErrors;
}
}
//reading first 18 bytes of the header
$binary_data = fread($this->zipfile, 18);
//if block size is not valid
if ((self::$bMbstring ? mb_strlen($binary_data, "latin1") : strlen($binary_data)) != 18) {
$this->_errorLog("ERR_ARC_END_SIZE", str_replace("#SIZE#", strlen($binary_data), GetMessage("MAIN_ZIP_ERR_ARC_END_SIZE")));
return $this->arErrors;
}
//extracting values
$data = unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size', $binary_data);
//checking global size
if ($pos + $data['comment_size'] + 18 != $size) {
$this->_errorLog("ERR_SIGNATURE", GetMessage("MAIN_ZIP_ERR_SIGNATURE"));
return $this->arErrors;
}
//reading comments
if ($data['comment_size'] != 0) {
$arCentralDir['comment'] = fread($this->zipfile, $data['comment_size']);
} else {
$arCentralDir['comment'] = '';
}
$arCentralDir['entries'] = $data['entries'];
$arCentralDir['disk_entries'] = $data['disk_entries'];
$arCentralDir['offset'] = $data['offset'];
$arCentralDir['size'] = $data['size'];
$arCentralDir['disk'] = $data['disk'];
$arCentralDir['disk_start'] = $data['disk_start'];
return $res;
}
private function _openRead()
{
if ($this->_bCompress) {
$this->_dFile = @gzopen($this->io->GetPhysicalName($this->_strArchiveName), "rb");
} else {
$this->_dFile = @fopen($this->io->GetPhysicalName($this->_strArchiveName), "rb");
}
if (!$this->_dFile) {
$this->_arErrors[] = array("ERR_OPEN", str_replace("#FILE_NAME#", removeDocRoot($this->_strArchiveName), GetMessage("MAIN_ARCHIVE_ERR_OPEN")));
return false;
}
return true;
}
/**
* Return path without $_SERVER['DOCUMENT_ROOT']
* @param string $path
* @return string
*/
protected static function removeDocumentRoot($path)
{
$path = removeDocRoot($path);
return $path;
}
/**
* Checks if current user has access to the file or folder according to Bitrix permissions
* @static
* @param string $strFilename full path to the file
* @param boolean $isFile true if we check file permissions, false if folder permissions should be checked
* @return boolean
*/
public static function HasAccess($strFilename, $isFile)
{
$result = false;
$path = removeDocRoot($strFilename);
global $USER;
if (!$isFile) {
if ($USER->CanDoFileOperation("fm_view_listing", array(SITE_ID, $path))) {
$result = true;
}
} else {
if ($USER->CanDoFileOperation('fm_view_file', array(SITE_ID, $path)) && ($USER->CanDoOperation('edit_php') || $USER->CanDoFileOperation('fm_lpa', array(SITE_ID, $path)) || !(HasScriptExtension($path) || substr(GetFileName($path), 0, 1) == "."))) {
$result = true;
}
}
return $result;
}
