I was wondering the same thing, and set out to solve the problem.
I just subclassed FilePart and overrode the sendData method. It
notifies a Dialog of the uploaded chunk, which in turn, updates the
progress meter. Here's the complete code for the subclass:
import
java.io.File;
import
java.io.FileNotFoundException;
import
java.io.IOException;
import
java.io.InputStream;
import
java.io.OutputStream;
import
org.apache.commons.httpclient.methods.multipart.*;
/**
* A FilePart
that notifies the calling dialog when a chunk of data has been
* uploaded.
*
* @author Cole
Kelley
*/
public class
NewFilePart extends FilePart
{
private
UploadDialog dialog;
public static
final double NANO = 1000000000.0;
public
NewFilePart(String name, File file, UploadDialog d)
throws
FileNotFoundException
{
super(name,
file);
dialog = d;
}
@Override
protected void
sendData(OutputStream out) throws IOException
{
//LOG.trace("enter sendData(OutputStream out)");
if
(lengthOfData() == 0)
{
// this
file contains no data, so there is nothing to send.
// we
don't want to create a zero length buffer as this will
// cause
an infinite loop when reading.
//LOG.debug("No data to send.");
return;
}
byte[] tmp
= new byte[4096];
InputStream
instream = super.getSource().createInputStream();
try
{
int len;
while
((len = instream.read(tmp)) >= 0)
{
long
start_time = System.nanoTime();
out.write(tmp, 0, len);
//
Get nanoseconds since upload started and finished.
long
complete_in = System.nanoTime() - start_time;
//
Grab the transfer bitrate.
long
Bps = Math.round(len/(complete_in/NANO));
//
Let the dialog know a chunk is done
dialog.notifyChunk(len, Bps);
}
} finally
{
// we're
done with the stream, close it
instream.close();
}
}
}
Hope that helps!
Cole Kelley
Stephen More wrote:
commons-FileUpload has a ProgressListener to display bytes transferred.
Utilities like wget provide a progress bar as well.
Can httpclient provide similiar information ( either now or in the future ) ?
-Thanks
Stephen More
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