The documentation for InputStream.read() says that it returns
-1 on EOF, but the simple program below that reads from a network
subclass of InputStream returns 0 when the end of the stream is reached.

Save the following in Grab.oak and compile with oakc.
Invoke it with "oaki grab http://www/~csw/"
and notice that at the end of the stream the read() returns 0, not -1.

import oak.io.*;
import net.www.http.HttpClient;
import net.www.html.URL;
 
public class Grab extends HttpClient {
    public Grab(String url) {
        super(new URL(null, url));
    }
 
    protected void processRequest(String name) {
        InputStream dis = serverInput;
        int n;
        byte buf[] = new byte[1024];
 
        while ((n = dis.read(buf)) != -1) {
            System.err.println("n="+n);
            System.out.write(buf, 0, n);
        }
        System.out.flush();
        dis.close();
    }
 
    public static void main(String args[]) {
        try {
            Grab grab = new Grab(args[0]);
        } catch (Exception e) {
            System.err.println("err");
            System.err.println(e);
            e.printStackTrace();
        }
    }
 
}