Converts a quoted-printable string to a byte array.
ByteArrayOutputStream out = new ByteArrayOutputStream();
ByteArrayOutputStream whitespaceAccumulator =
new ByteArrayOutputStream();
char[] data = sdata.toCharArray();
byte[] linebreak = Configuration.getProperty("file.linebreak").
getBytes();
boolean followingEqualsSign = false;
for (int i = 0; i < data.length; i++) {
char currSym = data[i];
if (followingEqualsSign) {
switch (currSym) {
case '\r":
// RFC 2045: check for soft break (=CRLF)
if (i + 1 < data.length) {
if (data[i + 1] == '\n") {
// concatenate lines
i++;
break;
}
}
default: {
// inlined byte
if (i < data.length - 1) {
String charCode = sdata.substring(i, i + 2);
i ++;
try {
out.write(Integer.parseInt(charCode, 16));
break;
} catch (NumberFormatException nfe) {
// illegal data. write the data as is
out.write('=");
out.write(charCode.charAt(0));
out.write(charCode.charAt(1));
}
} else {
// '=' is the penultimate character, which is also
// illegal. write the data as is
out.write('=");
out.write(currSym);
}
}
}
followingEqualsSign = false;
} else {
try {
/**
* RFC 2045: Control characters other than TAB, or CR and LF
* as parts of CRLF pairs, must not appear. The same is true
* for octets with decimal values greater than 126. If
* found in incoming quoted-printable data by a decoder, a
* robust implementation might exclude them from the
* decoded data.
*/
if (((currSym < ' ") &&
(currSym != '\t") &&
(currSym != '\r")) ||
(currSym > 126)) { // ignore
continue;
}
switch (currSym) {
case '=": {
out.write(whitespaceAccumulator.toByteArray());
whitespaceAccumulator.reset();
followingEqualsSign = true;
break;
}
case '\t":
case ' ":
whitespaceAccumulator.write(currSym);
break;
case '\r": // must be a part of CRLF (RFC 2045)
if (i + 1 < data.length) {
if (data[i + 1] == '\n") {
whitespaceAccumulator.reset();
out.write(linebreak, 0, linebreak.length);
i ++; // skip LF
}
}
break;
default: {
out.write(whitespaceAccumulator.toByteArray());
whitespaceAccumulator.reset();
out.write(currSym);
}
}
} catch (IOException e) {
// the compiler claims that an IOException can occur
// on a call to toByteArray(). The javadocs and
// the ByteArrayOutputStream class file claim otherwise.
}
}
}
try {
out.write(whitespaceAccumulator.toByteArray());
} catch (IOException e) {
// same story as above.
}
return out.toByteArray();
