Method encodeFromFile

java/src/cx/fbn/encrypt/Base64.java:1524–1559

Convenience method for reading a binary file and base64-encoding it. As of v 2.3, if there is a error, the method will throw an java.io.IOException. This is new to v2.3! In earlier versions, it just returned false, but in retrospect that's a pretty poor way to handle it. @param filen

( String filename )

     * @since 2.1
     */
    public static String encodeFromFile( String filename )
    throws java.io.IOException {
        
        String encodedData = null;
        Base64.InputStream bis = null;
        try
        {
            // Set up some useful variables
            java.io.File file = new java.io.File( filename );
            byte[] buffer = new byte[ Math.max((int)(file.length() * 1.4),40) ]; // Need max() for math on small files (v2.2.1)
            int length   = 0;
            int numBytes = 0;
            
            // Open a stream
            bis = new Base64.InputStream( 
                      new java.io.BufferedInputStream( 
                      new java.io.FileInputStream( file ) ), Base64.ENCODE );
            
            // Read until done
            while( ( numBytes = bis.read( buffer, length, 4096 ) ) >= 0 ) {
                length += numBytes;
            }   // end while
            
            // Save in a variable to return
            encodedData = new String( buffer, 0, length, Base64.PREFERRED_ENCODING );
                
        }   // end try
        catch( java.io.IOException e ) {
            throw e; // Catch and release to execute finally{}
        }   // end catch: java.io.IOException
        finally {
            try{ bis.close(); } catch( Exception e) {}
        }   // end finally
        
        return encodedData;
        }   // end encodeFromFile
    
    /**
     * Reads <tt>infile</tt> and encodes it to <tt>outfile</tt>.