QEncoderStreampublic class QEncoderStream extends QPEncoderStream This class implements a Q Encoder as defined by RFC 2047 for
encoding MIME headers. It subclasses the QPEncoderStream class. |
Fields Summary |
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private String | specials | private static String | WORD_SPECIALS | private static String | TEXT_SPECIALS |
Constructors Summary |
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public QEncoderStream(OutputStream out, boolean encodingWord)Create a Q encoder that encodes the specified input stream
super(out, Integer.MAX_VALUE); // MAX_VALUE is 2^31, should
// suffice (!) to indicate that
// CRLFs should not be inserted
// when encoding rfc822 headers
// a RFC822 "word" token has more restrictions than a
// RFC822 "text" token.
specials = encodingWord ? WORD_SPECIALS : TEXT_SPECIALS;
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Methods Summary |
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public static int | encodedLength(byte[] b, boolean encodingWord)Returns the length of the encoded version of this byte array.
int len = 0;
String specials = encodingWord ? WORD_SPECIALS: TEXT_SPECIALS;
for (int i = 0; i < b.length; i++) {
int c = b[i] & 0xff; // Mask off MSB
if (c < 040 || c >= 0177 || specials.indexOf(c) >= 0)
// needs encoding
len += 3; // Q-encoding is 1 -> 3 conversion
else
len++;
}
return len;
| public void | write(int c)Encodes the specified byte to this output stream.
c = c & 0xff; // Turn off the MSB.
if (c == ' ")
output('_", false);
else if (c < 040 || c >= 0177 || specials.indexOf(c) >= 0)
// Encoding required.
output(c, true);
else // No encoding required
output(c, false);
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