/**
* Recupera o Mime-type de um arquivo
* @param File $file
* @return string
*/
public function getMimeType( File $file ) {
$ret = false;
$iterator = $this->getIterator();
$parser = new MagicParser( $file , $this );
if ( !$file->isOpened() ) $file->open( 'r' );
for ( $iterator->rewind() ; $iterator->valid() ; $iterator->next() ) {
if ( ( $ret = $parser->parse( $iterator ) ) !== false ) {
break;
}
}
return $ret;
}
/**
* Interpreta a linha do arquivo magic e compara com o arquivo passado para descobrir
* o Content-Type do arquivo
* @param Iterator $iterator
*/
public function parse( Iterator $iterator ) {
$ret = false;
$match = array();
$line = preg_replace( array( "/\r\n|\r|\n/" , '/\s{2,}/' ) , array( null , "\t" ) , $iterator->current() );
if ( preg_match( "/^(?<d>\\>)?(?<b>\\d+)\\s*(?<t>(byte|string|(be|le)?(short|long|date)))\\s+(?<c>[^\t]+)(\\s*(?<mt>[^\t]+)(\\s*(?<me>[^\t]+))?)?$/s" , $line , $match ) ) {
$byteNumber = (int) $match[ 'b' ];
switch ( $match[ 't' ] ) {
case 'string' :
$match[ 'c' ] = stripcslashes( $match[ 'c' ] );
case 'byte' :
$dataContents = $match[ 'c' ];
break;
case 'short' :
$dataContents = pack( 'S' , $this->numberConvert( $match[ 'c' ] ) );
break;
case 'beshort' :
$dataContents = pack( 'n' , $this->numberConvert( $match[ 'c' ] ) );
break;
case 'leshort' :
$dataContents = pack( 'v' , $this->numberConvert( $match[ 'c' ] ) );
break;
case 'long' :
$dataContents = pack( 'L' , $this->numberConvert( $match[ 'c' ] ) );
break;
case 'belong' :
$dataContents = pack( 'N' , $this->numberConvert( $match[ 'c' ] ) );
break;
case 'lelong' :
$dataContents = pack( 'V' , $this->numberConvert( $match[ 'c' ] ) );
break;
// TODO: implementar os tipos date, ledate e bedate
case 'date' :
case 'ledate' :
case 'bedate' :
default :
return false;
}
if ( $this->compare( $byteNumber , $dataContents ) ) {
$ret = $match[ 'mt' ];
if ( !empty( $match[ 'me' ] ) ) {
$ret = sprintf( '%s; charset=%s' , $ret , $match[ 'me' ] );
}
if ( empty( $match[ 'd' ] ) ) {
$offset = $this->magic->tell();
$magic = new MagicParser( $this->file , $this->magic );
do {
$iterator->next();
$current = $iterator->current();
if ( substr( $current , 1 , 1 ) != '>' ) {
$this->magic->seek( $offset );
break;
} else {
$offset = $this->magic->tell();
if ( ( $newRet = $magic->parse( $iterator ) ) !== false ) {
$ret = & $newRet;
for (; $iterator->valid() ; $iterator->next() ) {
if ( substr( $iterator->current() , 1 , 1 ) == '>' ) {
$this->magic->seek( $offset );
break 2;
} else {
$offset = $this->magic->tell();
}
}
}
}
} while ( $iterator->valid() && ( substr( $current , 1 , 1 ) == '>' ) );
}
}
}
return $ret;
}
