public static String encodeToSafeAsciiFileNameString ( String str , Charset strCharset ) { if ( str == null ) { return str ; } if ( ! SAFE_ASCII_PATTERN . matcher ( str ) . matches ( ) ) { return calcSHA1Digest ( str , strCharset ) ; } // encode again since if str is SHA1 digest // it can easily conflict with the other encoded string if ( SHA1_DIGEST_PATTERN . matcher ( str ) . matches ( ) ) { return calcSHA1Digest ( str , strCharset ) ; } return str ; }
- character which will be encoded by URL encoding