/**
* Read bytes.
*
* @return If the filter does request length control, this value is significant; it should be the
* number of bytes consumed from the buffer, up until the end of the current request body, or
* the buffer length, whichever is greater. If the filter does not do request body length
* control, the returned value should be -1.
*/
public int doRead(ByteChunk chunk, Request req) throws IOException {
int result = -1;
if (contentLength >= 0) {
if (remaining > 0) {
int nRead = buffer.doRead(chunk, req);
if (nRead > remaining) {
// The chunk is longer than the number of bytes remaining
// in the body; changing the chunk length to the number
// of bytes remaining
chunk.setBytes(chunk.getBytes(), chunk.getStart(), (int) remaining);
result = (int) remaining;
} else {
result = nRead;
}
if (nRead > 0) {
remaining = remaining - nRead;
}
} else {
// No more bytes left to be read : return -1 and clear the
// buffer
chunk.recycle();
result = -1;
}
}
return result;
}
public long end() throws IOException {
final int maxSwallowSize = org.apache.coyote.Constants.MAX_SWALLOW_SIZE;
final boolean maxSwallowSizeExceeded = (maxSwallowSize > -1 && remaining > maxSwallowSize);
long swallowed = 0;
// Consume extra bytes.
while (remaining > 0) {
int nread = buffer.doRead(endChunk, null);
if (nread > 0) {
swallowed += nread;
remaining = remaining - nread;
if (maxSwallowSizeExceeded && swallowed > maxSwallowSize) {
// Note: We do not fail early so the client has a chance to
// read the response before the connection is closed. See:
// http://httpd.apache.org/docs/2.0/misc/fin_wait_2.html#appendix
throw new IOException(sm.getString("inputFilter.maxSwallow"));
}
} else { // errors are handled higher up.
remaining = 0;
}
}
// If too many bytes were read, return the amount.
return -remaining;
}