The Undertow 1.2 branch supports both HTTP2 and SPDY, both of which support the concept of server push. If you are unfamiliar with server push this basically gives the server the ability to push resources cachable resources to a client before a client has requested them. For example if a client requests a HTML page and the server knows this page contains an image, the server could push the image to the client immediately...

Undertow 1.1.0.Final has been released and is available from maven central. This release brings a number of improvements, including: Websockets 1.1 SPDY support Many bug fixes More details on websocket improvements and SPDY support will be coming in new blog posts in the coming weeks.

The Undertow 1.2 branch now supports the latest draft of the HTTP2 spec. We have a demo site up and running at https://http2.undertow.io. So far, we have verified HTTP/2 interop with the following browsers: Chrome Canary (41.0.2217.0) Firefox (Nightly build of 36.01a) Internet Explorer (Windows 10 Preview) The demo site contains instructions for testing it out, including getting it running locally. The HTTP2 code is still...

Undertow is a high-performance non-blocking webserver that is the new web server in WildFly. Some notable features include: HTTP upgrade support – This enables management and EJB invocations to be multiplexed over the web port without any performance loss Websocket support, including JSR-356 Servlet 3.1 support Ability to mix non-blocking handlers with Servlet Undertow is completely standalone, starts in milliseconds, and has a fluent builder API for building deployments. This all...