/**
* Obtain the byte array for this part of the request.
*
* <p>It may be necessary to modify this code to handle additional encoding types such as Base64.
*
* @param input Object from which data is read
* @param thisPage Object containing information for this request
* @param encoding type of character encoding to be used
* @return Byte array for this part of request
* @throws IOException if io errors
*/
protected byte[] readPart(ServletInputStream input, ThisPage thisPage, String encoding)
throws IOException {
HttpServletRequest req = thisPage.getRequest();
String boundary = extractBoundary(req);
byte buffer[] = new byte[4096];
int bytesRead = -1;
ByteArrayOutputStream working = null;
boolean pendingRN = false;
working = new ByteArrayOutputStream();
/*
* Read body of part
*/
while (true) {
bytesRead = input.readLine(buffer, 0, buffer.length);
if (bytesRead < 0) {
thisPage.addMessage("readPart method - Section of form not properly ended");
thisPage.errorMessage();
return null;
} else if (bytesRead == 0) {
thisPage.addMessage("readPart method - Read yielded 0 characters");
thisPage.errorMessage();
return null;
} else if (bytesRead == 1 && buffer[0] == '\n') {
if (pendingRN) {
working.write('\r');
working.write('\n');
pendingRN = false;
}
working.write(buffer[0]);
} else if (new String(buffer, 0, bytesRead).equals("--" + boundary + "\r\n")) {
if (!pendingRN) {
thisPage.addMessage("readPart method - Boundary reached without preceding end of line");
thisPage.errorMessage();
return null;
}
if (working.size() == 0) {
return null;
}
return working.toByteArray();
} else if (new String(buffer, 0, bytesRead).equals("--" + boundary + "--\r\n")) {
thisPage.setEndOfPacket(true);
if (!pendingRN) {
thisPage.addMessage(
"readPart method - Final boundary reached with preceding end of line");
thisPage.errorMessage();
return null;
}
if (working.size() == 0) {
return null;
}
return working.toByteArray();
} else if (buffer[bytesRead - 2] == '\r' && buffer[bytesRead - 1] == '\n') {
if (pendingRN) {
working.write('\r');
working.write('\n');
}
if (bytesRead > 2) {
working.write(buffer, 0, bytesRead - 2);
}
pendingRN = true;
} else if (buffer[bytesRead - 1] == '\r') {
if (pendingRN) {
working.write('\r');
working.write('\n');
pendingRN = false;
}
if (bytesRead > 1) {
working.write(buffer, 0, bytesRead - 1);
}
int nextChar = input.read();
if (nextChar == '\n') {
pendingRN = true;
} else {
working.write('\r');
working.write(nextChar);
}
} else {
if (pendingRN) {
working.write('\r');
working.write('\n');
pendingRN = false;
}
working.write(buffer, 0, bytesRead);
}
}
}
