Hi Denis, Indeed, -1 is used as a marker for the end of an input stream by Restlets and actually by the JDK, see: http://java.sun.com/j2se/1.5.0/docs/api/java/io/InputStream.html#read()
The other important point is that bytes are handled by streams as ints within the 0 to 255 range. I'm not too familiar with POI, but from what I've seen in the Javadocs, you do something like this: - prepare your POI's POIFSDocument or DocumentEntry instance - create a new org.apache.poi.poifs.filesystem.DocumentInputStream - create a new org.restlet.resource.InputRepresentation, passing the DocumentInputStream created before - set the InputRepresentation instance as the entity of your Restlet response. - the rest (actual writing of the document will transparently by handled by the InputRepresentation class) Let me know if it doesn't work! Best regards, Jerome > -----Message d'origine----- > De : Denis Haskin [mailto:[EMAIL PROTECTED] > Envoyé : jeudi 1 mars 2007 05:39 > À : [email protected] > Objet : OutputRepresentation, binary, and -1 > > I'm wondering if I'm misunderstanding something about > OutputRepresentation and binary content. > > I've got a test where I write the contents of a byte array in > my OutputRepresentation.write() method. It appears that this > output is getting truncated when it hits a -1 in the binary content. > > For example, with this test: > > OutputRepresentation r = new > OutputRepresentation(MediaType.APPLICATION_EXCEL) { > public void write(OutputStream stream) throws > IOException { > byte[] bytes = new byte[] { 1, 2, 3, 4, 5, 6, > 7, 8, 9, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9}; > stream.write(bytes); > } > }; > > I get 20 bytes when I read the stream later. > > If I do this: > > OutputRepresentation r = new > OutputRepresentation(MediaType.APPLICATION_EXCEL) { > public void write(OutputStream stream) throws > IOException { > byte[] bytes = new byte[] { 1, 2, 3, 4, 5, 6, > 7, 8, 9, -1, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9}; > stream.write(bytes); > } > }; > > I only get 9 bytes when I read it. Inspecting > ByteUtils.getStream indicates this might be true, that -1 is > being used as a flag byte to indicate the end of the stream. > > Is that correct? > > As you can see fromm this example, what I'm really trying to > do is deliver Excel content to the browser... in this case > it's an in-memory workbook (generated with Poi) and I'm just > sending the bytes down. I'm actually not sure if I need some > encoding or whether just writing the byte stream is sufficient. > > Thoughts? > > Thanks, > > Denis haskin > > >
