Java
wrap MultipartRequestEntity
26-Jan-2010 15:46:07
To check progress using HttpClient, wrap the MultipartRequestEntity around one that counts the bytes being sent.
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.commons.httpclient.methods.RequestEntity;
public class CountingMultipartRequestEntity implements RequestEntity {
private final RequestEntity delegate;
private final ProgressListener listener;
public CountingMultipartRequestEntity(final RequestEntity entity,
final ProgressListener listener) {
super();
this.delegate = entity;
this.listener = listener;
}
public long getContentLength() {
return this.delegate.getContentLength();
}
public String getContentType() {
return this.delegate.getContentType();
}
public boolean isRepeatable() {
return this.delegate.isRepeatable();
}
public void writeRequest(final OutputStream out) throws IOException {
this.delegate.writeRequest(new CountingOutputStream(out, this.listener));
}
public static interface ProgressListener {
void transferred(long num);
}
public static class CountingOutputStream extends FilterOutputStream {
private final ProgressListener listener;
private long transferred;
public CountingOutputStream(final OutputStream out,
final ProgressListener listener) {
super(out);
this.listener = listener;
this.transferred = 0;
}
public void write(byte[] b, int off, int len) throws IOException {
super.write(b, off, len);
this.transferred += len;
this.listener.transferred(this.transferred);
}
public void write(int b) throws IOException {
super.write(b);
this.transferred++;
this.listener.transferred(this.transferred);
}
}
}
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