跳至主要内容

Servlet 4.0: HTTP/2 Server PUSH

Server Push

One highlight feature of HTTP/2 is Server Push. Servlet 4.0 add PushBuilder to handle push.
An exmaple of enable Servlet Push.
@WebServlet(urlPatterns="")
@ServletSecurity(httpMethodConstraints={
        @HttpMethodConstraint(value="GET", transportGuarantee=CONFIDENTIAL) })
public class PushServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse res)
            throws IOException, ServletException {
        PushBuilder pushBuilder = req.newPushBuilder().
            path("main.css");
        pushBuilder.push();
        res.getWriter().println("<html><head><title>HTTP2 Test</title><link rel=\"stylesheet\" href=\"main.css\"></head><body>Hello Servlet Push!!!</body></html>");
    }
}
Run this application on Glassfish v5 in NetBeans IDE, it will open https://localhost:8181/servlet-push/ in browser instead of http://localhost:8080/servlet-push/.
Server push
There is a warning flag on the https icon of address bar, the SSL certificate in Glassfish v5 is not recognised by Firefox. Click it and add localhost to the exception and make Firefox trust it.
Server push
In the Network tab of developer tools, you will the main.css is initialized by Push.
Server Push
Grab the source codes from my github account, and have a try.

标签：

评论

发表评论

此博客中的热门博文

Create a restful application with AngularJS and Zend 2 framework

Create a restful application with AngularJS and Zend 2 framework This example application uses AngularJS/Bootstrap as frontend and Zend2 Framework as REST API producer. The backend code This backend code reuses the database scheme and codes of the official Zend Tutorial, and REST API support is also from the Zend community. Getting Started with Zend Framework 2 Getting Started with REST and Zend Framework 2 Zend2 provides a   AbstractRestfulController   for RESR API producing. class AlbumController extends AbstractRestfulController { public function getList() { $results = $this->getAlbumTable()->fetchAll(); $data = array(); foreach ($results as $result) { $data[] = $result; } return new JsonModel(array( 'data' => $data) ); } public function get($id) { $album = $this->getAlbumTable()->getAlbum($id); return new JsonModel(array("data" =...
发表评论
阅读全文

JPA 2.1: Attribute Converter

JPA 2.1: Attribute Converter If you are using Hibernate, and want a customized type is supported in your Entity class, you could have to write a custom Hibernate Type. JPA 2.1 brings a new feature named attribute converter, which can help you convert your custom class type to JPA supported type. Create an Entity Reuse the   Post   entity class as example. @Entity @Table(name="POSTS") public class Post implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name="ID") private Long id; @Column(name="TITLE") private String title; @Column(name="BODY") private String body; @Temporal(javax.persistence.TemporalType.DATE) @Column(name="CREATED") private Date created; @Column(name="TAGS") private List<String> tags=new ArrayList<>(); } Create an attribute convert...
发表评论
阅读全文

Auditing with Hibernate Envers

Auditing with Hibernate Envers The approaches provided in JPA lifecyle hook and Spring Data auditing only track the creation and last modification info of an Entity, but all the modification history are not tracked. Hibernate Envers fills the blank table. Since Hibernate 3.5, Envers is part of Hibernate core project. Configuration Configure Hibernate Envers in your project is very simple, just need to add   hibernate-envers   as project dependency. <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-envers</artifactId> </dependency> Done. No need extra Event listeners configuration as the early version. Basic Usage Hibernate Envers provides a simple   @Audited   annotation, you can place it on an Entity class or property of an Entity. @Audited private String description; If   @Audited   annotation is placed on a property, this property can be tracked. @Entity @Audited public clas...
1 条评论
阅读全文