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Re: [jetty-users] Cannot get org.eclipse.jetty.server.Request instance


On Tue, Sep 10, 2019 at 1:41 PM John Jiang <john.sha.jiang@xxxxxxxxx> wrote:
> I wanted to test the HTTP/2 feature server push with Jetty 9.4.20, and made a simple servlet like the below,
> public class ServerPushServlet extends HttpServlet {
>     protected void doGet(HttpServletRequest request,
>             HttpServletResponse response) throws ServletException, IOException {
>             Request req = Request.getBaseRequest(request);
>             System.out.println("req: " + req);
>             PushBuilder pushBuilder = req.getPushBuilder();
>             pushBuilder.path("/res").push();
>     }
> }
> When tried to access http://localhost:port/push with FireFox, the following error raised,
> req: null
> 2019-09-10 16:21:58.906:WARN:oejs.HttpChannel:qtp1793329556-11: /push
> java.lang.NullPointerException
> at httptest.ServerPushServlet.push(Unknown Source)

The problem is that


return null if push is not supported.

This happens because you are making the request using HTTP/1.1 as
browsers don't support HTTP/2 if it's not encrypted.
You should try https instead of http.

Simone Bordet
Developer advice, training, services and support
from the Jetty & CometD experts.

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