Hey there,
I am trying to output large files and with support for Content-Range
header. It seems like I need to use
org.restlet.representation.OutputRepresentation. From what I've read online and
in the book, I expect this to work, however inefficiently, "out of the box",
but I did this:
this.getRangeService().setEnabled(true);
in my top-level restlet, just to be sure. Unfortunately, I've found the server
hangs after serving the required amount of data. I have experimented with just
supplying the amount of data actually requested, but that causes problems as
well.
My code looks something like this the code below. Any help appreciated, as I'm
a bit baffled and not really sure how to proceed. So far most of my data has
been automagically converted to XML without much thought, and I'm not really
sure how this part of the process actually works.
List<Range> ranges = getRequest().getRanges();
Range ranget;
if( ranges.size() == 0 )
ranget = null;
else if( ranges.size() == 1 )
ranget = ranges.get(0);
else
return // error not supported!!!
final Range range = ranget;
if( range != null && range.getSize() + range.getIndex()
> ms.getTotalSize() )
return // error: requested out of range
//Note: I'm not actually using the range found above,
but I've been playing with it, so I thought I'd include it.
OutputRepresentation os = new OutputRepresentation( new
MediaType(m.getMimeType()), ms.getTotalSize()) {
@Override
public void write(OutputStream outputStream)
throws IOException {
Iterator<MediaChunk> curChunk =
ms.getChunks().iterator();
byte[] b = new byte[10240];
long cur = 0;
long amt = 0;
try {
while( curChunk.hasNext() ) {
MediaChunk mc =
curChunk.next();
InputStream is =
mc.openStream();
try {
while( true ) {
int r;
r=is.read(b);
if( r
== -1 )
break;
cur +=
r;
amt +=
r;
outputStream.write(b, 0, r); //HANGS HERE!
}
} finally {
is.close();
}
}
} finally {
outputStream.close();
long s = ms.getTotalSize() ;
if( amt != s )
throw new IOException(
"Error reading requested data: " + amt + " : " + s );
}
}
}
-----------------------------
Bjorn Roche
http://www.xonami.com
Audio Collaboration
http://blog.bjornroche.com
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