question: @ Nullable public static byte [ ] decode ( String s ) { byte [ ] bytes ; try { bytes = s . getBytes ( PREFERRED_ENCODING ) ; } catch ( java . io . UnsupportedEncodingException uee ) { bytes = s . getBytes ( ) ; } bytes = decode ( bytes , 0 , bytes . length ) ; if ( bytes != null && bytes . length >= 4 ) { int head = ( ( int ) bytes [ 0 ] & 0xff ) | ( ( bytes [ 1 ] << 8 ) & 0xff00 ) ; if ( java . util . zip . GZIPInputStream . GZIP_MAGIC == head ) { java . io . ByteArrayInputStream bais = null ; java . util . zip . GZIPInputStream gzis = null ; java . io . ByteArrayOutputStream baos = null ; byte [ ] buffer = new byte [ 2048 ] ; int length = 0 ; try { baos = new java . io . ByteArrayOutputStream ( ) ; bais = new java . io . ByteArrayInputStream ( bytes ) ; gzis = new java . util . zip . GZIPInputStream ( bais ) ; while ( ( length = gzis . read ( buffer ) ) >= 0 ) { baos . write ( buffer , 0 , length ) ; } bytes = baos . toByteArray ( ) ; } catch ( java . io . IOException e ) { } finally { try { baos . close ( ) ; } catch ( Exception e ) { } try { gzis . close ( ) ; } catch ( Exception e ) { } try { bais . close ( ) ; } catch ( Exception e ) { } } } } return bytes ; }
target:  Decodes data from Base64 notation, automatically detecting gzip-compressed data and decompressing it.