On Sun, 2010-03-21 at 14:36 +0100, Oleg Kalnichevski wrote:
> Folks
>
> Please DO try to find a few minutes to review the release notes and
> release packages for the coming HttpCore 4.1-beta1
>
> Release notes:
> http://people.apache.org/~olegk/httpcore-4.1-beta1-preview/RELEASE_NOTES.txt
>
> Release packages:
> http://people.apache.org/~olegk/httpcore-4.1-beta1-preview/
>
> If I hear no complaints I will proceed with building the official
> release packages in a few days.
>
> Oleg
>
Oleg, can you check on LengthDelimitedDecoder logic for Content-Length:
0? Looking at the code below (from the preview release) I don't think it
will ever change the status to complete.
On the line 95 dst.limit(newLimit), the limit is set to zero, so the
next read operation returns zero. This causes a perpetual read of zero
bytes and never completes. Perhaps it should have another condition to
complete immediately if the content length is zero?
Normally, I would create a bug for this, but because of the timing I
wanted to bring this up for discussion right away.
--
Thanks,
James
public class LengthDelimitedDecoder extends AbstractContentDecoder
implements FileContentDecoder {
private final long contentLength;
private long len;
public LengthDelimitedDecoder(
final ReadableByteChannel channel,
final SessionInputBuffer buffer,
final HttpTransportMetricsImpl metrics,
long contentLength) {
super(channel, buffer, metrics);
if (contentLength < 0) {
throw new IllegalArgumentException("Content length may not be
negative");
}
this.contentLength = contentLength;
}
public int read(final ByteBuffer dst) throws IOException {
if (dst == null) {
throw new IllegalArgumentException("Byte buffer may not be null");
}
if (this.completed) {
return -1;
}
int lenRemaining = (int) (this.contentLength - this.len);
int bytesRead;
if (this.buffer.hasData()) {
int maxLen = Math.min(lenRemaining, this.buffer.length());
bytesRead = this.buffer.read(dst, maxLen);
} else {
if (dst.remaining() > lenRemaining) {
int oldLimit = dst.limit();
int newLimit = oldLimit - (dst.remaining() - lenRemaining);
dst.limit(newLimit);
bytesRead = this.channel.read(dst);
dst.limit(oldLimit);
} else {
bytesRead = this.channel.read(dst);
}
if (bytesRead > 0) {
this.metrics.incrementBytesTransferred(bytesRead);
}
}
if (bytesRead == -1) {
this.completed = true;
return -1;
}
this.len += bytesRead;
if (this.len >= this.contentLength) {
this.completed = true;
}
return bytesRead;
}
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