Re: [jetty-users] Continuation Frame

[Muhui Jiang <jiangmuhui@xxxxxxxxx>]

Hi

I want to send an HTTP/2 request (header frame) to a HTTP/2 server without
setting the END_HEADERS flag and then keep sending CONTINUATION frames
periodically. Then to check whether it can degrade the server performance(a kind of DDos attack).

I still do not know how to use the HeadersGenerator in the http/2 protocol because I didn't use the Class for my whole test, I don't where should I insert the construct method to build a test I mentioned above.

It seems my code like this can not work

session.newStream(new HeadersFrame(metaDataA, null, false),

new Promise.Adapter<>(), new Stream.Listener.Adapter() {

@Override

public void onHeaders(Stream stream, HeadersFrame frame) {

// TODO Auto-generated method stub

System.err.println(frame + childpath.get(0));

}

@Override

public Stream.Listener onPush(Stream stream,

PushPromiseFrame frame) {

// TODO Auto-generated method stub

System.err.println(frame + childpath.get(0));

return this;

}

@Override

public void onData(Stream stream, DataFrame frame,

Callback callback) {

// TODO Auto-generated method stub

System.err.println(frame + childpath.get(0));

callback.succeeded();

}

});

      ByteBufferPool.Lease lease = new ByteBufferPool.Lease(null);

HeadersGenerator headersGenerator = new HeadersGenerator(new HeaderGenerator(), new HpackEncoder(),100);

headersGenerator.generateHeaders(  lease, 1, metaDataA, null, false);

Best Regards

Muhui Jiang

2015-09-25 19:07 GMT+08:00 Simone Bordet <sbordet@xxxxxxxxxxx>:

Hi,

On Fri, Sep 25, 2015 at 10:23 AM, Muhui Jiang <jiangmuhui@xxxxxxxxx> wrote:
> Hi
>
> Did you mean this
>
> generate(ByteBufferPool.Lease lease, FrameType frameType, int capacity, int
> length, int flags, int streamId)

I mean this:

http://git.eclipse.org/c/jetty/org.eclipse.jetty.project.git/tree/jetty-http2/http2-common/src/main/java/org/eclipse/jetty/http2/generator/HeadersGenerator.java#n84

As you can see, the behavior of the HeadersGenerator can be changed by
changing the "maxHeaderBlockFragment" configuration parameter.
By changing that, you can send continuation frames.

--
Simone Bordet
----
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