[undertow-dev] HTTP/2 Response Header in Java

[Jason Greene]

The ALPN jars are on maven central here:

https://repo1.maven.org/maven2/org/mortbay/jetty/alpn/alpn-boot/

You have to match the specific version for the JDK version that you use, which is documented on the alpa-chapter you linked.

> On Nov 10, 2015, at 11:52 AM, jorge lima <jorge.ayala2012 at gmail.com> wrote:
> 
> Hi,
> 
> thanks for the answer again, I'm using now this okhttp and looks very good for me, the problem is that I need to know how to set the proper ALPN boot jar in the bootclasspath (Jetty), I'm having troubles: 
> 
> java -Xbootclasspath/p:<path_to_alpn_boot_jar> ...
> 
> How I'm gonna put a path to alpn boot jar if I don't have any?
> 
> Here is the link:
> 
> https://www.eclipse.org/jetty/documentation/current/alpn-chapter.html <https://www.eclipse.org/jetty/documentation/current/alpn-chapter.html>
> 
> If you could help me I would appreciate.
> 
> 
> 
> 2015-11-10 7:34 GMT-03:00 Tomaž Cerar <tomaz.cerar at gmail.com <mailto:tomaz.cerar at gmail.com>>:
> First you will need client api that knows how to handle HTTP2.
> 
> java's URL/URI currently don't support http2 at all.
> There is JEP http://openjdk.java.net/jeps/110 <http://openjdk.java.net/jeps/110> to add support for it in JDK 9.
> 
> AFAK at the moment only https://github.com/square/okhttp <https://github.com/square/okhttp> client properly supports http2.
> But there is lots of development going on around this topic, best to look the internet 
> for solution that suits you best.
> 
> --
> tomaz
> 
> 
> 
> On Mon, Nov 9, 2015 at 9:12 PM, jorge lima <jorge.ayala2012 at gmail.com <mailto:jorge.ayala2012 at gmail.com>> wrote:
> Hi,
> 
> thanks for the answer. But what I really need to know is to discover if some website uses HTTP/2 or not, like how we use in URLConnection with Java:
> 
> URL url = new URL("https://developer.jboss.org/ <https://developer.jboss.org/>");
> Map<String, List<String>> map = new HashMap<>();
> URL obj = new URL(url.toString());
> URLConnection conn = obj.openConnection();
> map = conn.getHeaderFields();
> ...
> 
> 
> Thanks again!
> 
> 2015-11-09 16:51 GMT-03:00 Tomaž Cerar <tomaz.cerar at gmail.com <mailto:tomaz.cerar at gmail.com>>:
> It is not just http/2 header :)
> 
> but yes, undertow supports it, to enable it you will need to upgrade to Java 8 and do some additional setup.
> 
> see https://developer.jboss.org/message/929048 <https://developer.jboss.org/message/929048>
> http://undertow.io/blog/2015/03/26/HTTP2-In-Wildfly.html <http://undertow.io/blog/2015/03/26/HTTP2-In-Wildfly.html>
> 
> for how to setup it.
> 
> --
> tomaz
> 
> 
> On Mon, Nov 9, 2015 at 6:15 PM, jorge lima <jorge.ayala2012 at gmail.com <mailto:jorge.ayala2012 at gmail.com>> wrote:
> Hi,
> 
> Is there already a way to get the HTTP/2 response header in Java using Undertow? I really need to know. I'm using JDK 7 on my Java Project. Thank you very much!
> 
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> 
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--
Jason T. Greene
WildFly Lead / JBoss EAP Platform Architect
JBoss, a division of Red Hat

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