| java.lang.Object
 java.io.InputStream
java.io.FilterInputStream
com.knowgate.misc.Base64Decoder
| Base64Decoder | | public class Base64Decoder extends FilterInputStream (Code) | | A class to decode Base64 streams and strings.
See RFC 1521 section 5.2 for details of the Base64 algorithm.
This class can be used for decoding strings:
String encoded = "d2VibWFzdGVyOnRyeTJndWVTUw";
String decoded = Base64Decoder.decode(encoded);
or for decoding streams:
InputStream in = new Base64Decoder(System.in);
author:
Jason Hunter, Copyright © 2000
version:
1.1, 2002/11/01, added decodeToBytes() to better handle binary
version:
data (thanks to Sean Graham)
version:
1.0, 2000/06/11 |
| Constructor Summary | |
| public | Base64Decoder(InputStream in)
Constructs a new Base64 decoder that reads input from the given
InputStream. |
| Method Summary | |
| public static String | decode(String encoded)
Returns the decoded form of the given encoded string, as a String.
Note that not all binary data can be represented as a String, so this
method should only be used for encoded String data. | | public static byte[] | decodeToBytes(String encoded)
Returns the decoded form of the given encoded string, as bytes. | | public static void | main(String[] args)
| | public int | read()
Returns the next decoded character from the stream, or -1 if
end of stream was reached. | | public int | read(byte[] buf, int off, int len)
Reads decoded data into an array of bytes and returns the actual
number of bytes read, or -1 if end of stream was reached. |
| Base64Decoder | | public Base64Decoder(InputStream in)(Code) | | Constructs a new Base64 decoder that reads input from the given
InputStream.
Parameters:
in - the input stream |
| decode | | public static String decode(String encoded)(Code) | | Returns the decoded form of the given encoded string, as a String.
Note that not all binary data can be represented as a String, so this
method should only be used for encoded String data. Use decodeToBytes()
otherwise.
Parameters:
encoded - the string to decode the decoded form of the encoded string |
| decodeToBytes | | public static byte[] decodeToBytes(String encoded)(Code) | | Returns the decoded form of the given encoded string, as bytes.
Parameters:
encoded - the string to decode the decoded form of the encoded string |
| read | | public int read() throws IOException(Code) | | Returns the next decoded character from the stream, or -1 if
end of stream was reached.
the decoded character, or -1 if the end of theinput stream is reached
exception:
IOException - if an I/O error occurs |
| read | | public int read(byte[] buf, int off, int len) throws IOException(Code) | | Reads decoded data into an array of bytes and returns the actual
number of bytes read, or -1 if end of stream was reached.
Parameters:
buf - the buffer into which the data is read
Parameters:
off - the start offset of the data
Parameters:
len - the maximum number of bytes to read the actual number of bytes read, or -1 if the end of theinput stream is reached
exception:
IOException - if an I/O error occurs |
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