protected function warning($text)
{
return $this->getid3->warning($text);
}
public function __construct(getID3 $getid3, $algorithm)
{
$this->getid3 = $getid3;
// Check algorithm
if (!preg_match('/^(md5|sha1)$/', $algorithm)) {
throw new getid3_exception('Unsupported algorithm, "' . $algorithm . '", in GetHashdata()');
}
//// Handle ogg vorbis files
if (@$getid3->info['fileformat'] == 'ogg' && @$getid3->info['audio']['dataformat'] == 'vorbis') {
// We cannot get an identical md5_data value for Ogg files where the comments
// span more than 1 Ogg page (compared to the same audio data with smaller
// comments) using the normal getID3() method of MD5'ing the data between the
// end of the comments and the end of the file (minus any trailing tags),
// because the page sequence numbers of the pages that the audio data is on
// do not match. Under normal circumstances, where comments are smaller than
// the nominal 4-8kB page size, then this is not a problem, but if there are
// very large comments, the only way around it is to strip off the comment
// tags with vorbiscomment and MD5 that file.
// This procedure must be applied to ALL Ogg files, not just the ones with
// comments larger than 1 page, because the below method simply MD5's the
// whole file with the comments stripped, not just the portion after the
// comments block (which is the standard getID3() method.
// The above-mentioned problem of comments spanning multiple pages and changing
// page sequence numbers likely happens for OggSpeex and OggFLAC as well, but
// currently vorbiscomment only works on OggVorbis files.
if ((bool) ini_get('safe_mode')) {
throw new getid3_exception('PHP running in Safe Mode - cannot make system call to vorbiscomment[.exe] needed for ' . $algorithm . '_data.');
}
if (!preg_match('/^Vorbiscomment /', `vorbiscomment --version 2>&1`)) {
throw new getid3_exception('vorbiscomment[.exe] binary not found in path. UNIX: typically /usr/bin. Windows: typically c:\\windows\\system32.');
}
// Prevent user from aborting script
$old_abort = ignore_user_abort(true);
// Create empty file
$empty = tempnam('*', 'getID3');
touch($empty);
// Use vorbiscomment to make temp file without comments
$temp = tempnam('*', 'getID3');
$command_line = 'vorbiscomment -w -c ' . escapeshellarg($empty) . ' ' . escapeshellarg(realpath($getid3->filename)) . ' ' . escapeshellarg($temp) . ' 2>&1';
// Error from vorbiscomment
if ($vorbis_comment_error = `{$command_line}`) {
throw new getid3_exception('System call to vorbiscomment[.exe] failed.');
}
// Get hash of newly created file
$hash_function = $algorithm . '_file';
$getid3->info[$algorithm . '_data'] = $hash_function($temp);
// Clean up
unlink($empty);
unlink($temp);
// Reset abort setting
ignore_user_abort($old_abort);
// Return success
return true;
}
//// Handle other file formats
// Get hash from part of file
if (@$getid3->info['avdataoffset'] || @$getid3->info['avdataend'] && @$getid3->info['avdataend'] < $getid3->info['filesize']) {
if ((bool) ini_get('safe_mode')) {
$getid3->warning('PHP running in Safe Mode - backtick operator not available, using slower non-system-call ' . $algorithm . ' algorithm.');
$hash_function = 'hash_file_partial_safe_mode';
} else {
$hash_function = 'hash_file_partial';
}
$getid3->info[$algorithm . '_data'] = $this->{$hash_function}($getid3->filename, $getid3->info['avdataoffset'], $getid3->info['avdataend'], $algorithm);
} else {
$hash_function = $algorithm . '_file';
$getid3->info[$algorithm . '_data'] = $hash_function($getid3->filename);
}
}
