function Add_File_Header($bin, $file, $status, $meth, $volatile = true, $crc = 0, $zlen = 0, $len = 0, $extra = array())
{
// Strip leading slashes from file name (fixes bug in windows archive viewer)
$file = preg_replace('/^[\\/\\\\]+/', '', $file);
if ($bin === false) {
$bin = '';
} else {
if ($bin === WPONLINEBACKUP_BIN_DATABASE) {
$bin = _x('Database', 'Full backup folder name in downloadable ZIP file', 'wponlinebackup') . '/';
if (!$this->bin_database) {
$binstatus = array('mod_time' => time());
// Add the Database folder
if (true !== $this->Add_File_Header($bin, '', $binstatus, 0x0, false)) {
return $ret;
}
$this->bin_database = true;
}
} else {
if ($bin === WPONLINEBACKUP_BIN_FILESYSTEM) {
$bin = _x('FileSystem', 'Full backup folder name in downloadable ZIP file', 'wponlinebackup') . '/';
if (!$this->bin_filesystem) {
$binstatus = array('mod_time' => time());
// Add the Database folder
if (true !== $this->Add_File_Header($bin, '', $binstatus, 0x0, false)) {
return $ret;
}
$this->bin_filesystem = true;
}
}
}
}
$file = $bin . $file;
// Create dos timestamp
$dts = WPOnlineBackup_Functions::DOS_Time($status['mod_time']);
// Why don't we use general purpose bit flag bit 3 to make a streamable ZIP file?
// So that we can write CRC/ZLEN/LEN after the file data and not need to seek back and rewrite?
// Because Mac OS X Archive Utility doesn't work with them :-(
// Run this and try it: zip -X - smallfile.txt - | cat > test.zip
// Give it lots of data
// Then CTRL+D to end STIN and try to extract the test.zip - you'll get an error
// Using Windows or unzip command line will work
$genpurp = 0x0;
// Calculate extra data
$extraloc = '';
$extracdr = '';
if (in_array('rjct', $extra)) {
// The rejection header we will hide inside an extra field
$rjct = $this->disk->Get_Header();
// The extra field
$fields = array(array('v', 0x4400), array('v', strlen($rjct)));
// Pack extra field and rejection header
$extraloc .= WPOnlineBackup_Functions::Pack_Fields($fields) . $rjct;
}
if ($this->config['backwards_compat']) {
// Store the UTF-8 filename in an extra field
$fields = array(array('v', 0x7075), array('v', 5 + strlen($file)), array('C', 1), array('V', crc32($file)));
$fields = WPOnlineBackup_Functions::Pack_Fields($fields) . $file;
$extraloc .= $fields;
$extracdr .= $fields;
// ASCII filename
// We will assume valid UTF-8 was passed in, which currently it should be
// It would be a bug if we didn't - UTF8_To_ASCII only works properly with valid UTF-8 since it only modifyes UTF-8 chars
$fileloc = WPOnlineBackup_Functions::UTF8_To_ASCII($file);
} else {
// Just store UTF-8 in the local header, but user gen purpose bit flag 11
$fileloc = $file;
$genpurp |= 0x800;
}
$elenloc = strlen($extraloc);
$elencdr = strlen($extracdr);
$nlen = strlen($fileloc);
// Build file header
$fields = array(array('V', 0x4034b50), array('C', 20), array('C', 0), array('v', $genpurp), array('v', $meth), array('V', $dts), array('V', $crc), array('V', $zlen), array('V', $len), array('v', $nlen), array('v', $elenloc));
// Pack fields and calculate "total" length
$fields = WPOnlineBackup_Functions::Pack_Fields($fields) . $fileloc . $extraloc;
$record_len = strlen($fields) + $zlen;
// Write the header and filename
if ($volatile) {
// Write volatile so we can seek back and modify the CRC/ZLEN/LEN
if (true !== ($ret = $this->writer->Start_Volatile())) {
return $ret;
}
if (!is_int($pos = $this->writer->Volatile_Write($fields))) {
return $pos;
}
} else {
// No need for pos, we don't need to seek back
$pos = false;
if (true !== ($ret = $this->writer->Write($fields))) {
return $ret;
}
}
// Add to central directory record and increment offset
$record = compact('pos', 'fileloc', 'nlen', 'genpurp', 'meth', 'dts', 'crc', 'zlen', 'len', 'elencdr', 'extracdr');
// Store offset of this entry
$record['ofs'] = $this->ofs;
$this->file_count++;
// If we have a CDR already stored, write it to the CDR buffer, creating one if necessary
if ($this->last_cdr !== false) {
if ($this->cdr === false) {
if (($ret = $this->writer->Branch($this->cdr)) !== true) {
return $ret;
}
if (($ret = $this->cdr->Open('cdrbuffer')) !== true) {
return $ret;
}
}
if (($ret = $this->Add_CDR_File($this->cdr, $this->last_cdr)) !== true) {
return $ret;
}
}
// Store this CDR - if we only end up with a single CDR, we don't bother creating the CDR buffer then
$this->last_cdr = $record;
// Increase offset to be used for next entry
$this->ofs += $record_len;
return true;
}
