BAEL-3908_http2_client_in_jetty (#8981)

* BAEL-3908 http2 in jetty - initial commit

* BAEL-3908 - HTTP2 client in jetty

* BAEL-3908 - http2 in jetty - code cleanup

* BAEL-3908 - fixed indentation

libraries-server/src/main/config/jetty.xml

@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_0.dtd">
+
+<Configure id="Server" class="org.eclipse.jetty.server.Server">
+
+    <New id="sslContextFactory" class="org.eclipse.jetty.util.ssl.SslContextFactory">
+        <Set name="keyStorePath">src/main/resources/keystore.jks</Set>
+        <Set name="keyStorePassword">storepwd</Set>
+        <Set name="trustStorePath">src/main/resources/truststore.jks</Set>
+        <Set name="trustStorePassword">storepwd</Set>
+        <Set name="protocol">TLSv1.2</Set>
+    </New>
+    <New id="httpConfig" class="org.eclipse.jetty.server.HttpConfiguration"/>
+
+    <Call name="addConnector">
+        <Arg>
+            <New class="org.eclipse.jetty.server.ServerConnector">
+                <Arg name="server">
+                    <Ref id="Server"/>
+                </Arg>
+                <Arg name="factories">
+                    <Array type="org.eclipse.jetty.server.ConnectionFactory">
+                        <Item>
+                            <New class="org.eclipse.jetty.server.SslConnectionFactory">
+                                <Arg name="sslContextFactory">
+                                    <Ref id="sslContextFactory"/>
+                                </Arg>
+                                <Arg name="next">http/1.1</Arg>
+                            </New>
+                        </Item>
+                        <Item>
+                            <New class="org.eclipse.jetty.server.HttpConnectionFactory">
+                                <Arg name="config">
+                                    <Ref id="httpConfig"/>
+                                </Arg>
+                            </New>
+                        </Item>
+                    </Array>
+                </Arg>
+                <Set name="port">8443</Set>
+            </New>
+        </Arg>
+    </Call>
+
+    <Call name="addConnector">
+        <Arg>
+            <New class="org.eclipse.jetty.server.ServerConnector">
+                <Arg name="server">
+                    <Ref id="Server"/>
+                </Arg>
+                <Arg name="factories">
+                    <Array type="org.eclipse.jetty.server.ConnectionFactory">
+                        <Item>
+                            <New class="org.eclipse.jetty.server.SslConnectionFactory">
+                                <Arg name="sslContextFactory">
+                                    <Ref id="sslContextFactory"/>
+                                </Arg>
+                                <Arg name="next">alpn</Arg>
+                            </New>
+                        </Item>
+                        <Item>
+                            <New class="org.eclipse.jetty.alpn.server.ALPNServerConnectionFactory">
+                                <Arg>h2,h2-17</Arg>
+                            </New>
+                        </Item>
+                        <Item>
+                            <New class="org.eclipse.jetty.http2.server.HTTP2ServerConnectionFactory">
+                                <Arg name="config">
+                                    <Ref id="httpConfig"/>
+                                </Arg>
+                            </New>
+                        </Item>
+                    </Array>
+                </Arg>
+                <Set name="Port">8444</Set>
+            </New>
+        </Arg>
+    </Call>
+</Configure>

libraries-server/src/main/java/com/baeldung/jetty/http2/Http2JettyServlet.java

@@ -0,0 +1,29 @@
+package com.baeldung.jetty.http2;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+public class Http2JettyServlet extends HttpServlet {
+
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        response.addHeader("Cache-control", "no-store, no-cache, must-revalidate");
+        response.addDateHeader("Last-Modified", 0);
+        response.addDateHeader("Expires", 0);
+
+        String requestPath = request.getRequestURI();
+        InputStream input = getServletContext().getResourceAsStream(requestPath);
+        OutputStream output = response.getOutputStream();
+        byte[] buffer = new byte[1024];
+        int read;
+        while ((read = input.read(buffer)) >= 0) {
+            output.write(buffer, 0, read);            
+        }
+    }
+    
+}

libraries-server/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
+         version="3.1">
+
+    <servlet>
+        <servlet-name>http2Jetty</servlet-name>
+        <servlet-class>com.baeldung.jetty.http2.Http2JettyServlet</servlet-class>
+    </servlet>
+    <servlet-mapping>
+        <servlet-name>http2Jetty</servlet-name>
+        <url-pattern>/images/*</url-pattern>
+    </servlet-mapping>
+
+    <filter>
+        <filter-name>push</filter-name>
+        <filter-class>org.eclipse.jetty.servlets.PushCacheFilter</filter-class>
+        <init-param>
+            <param-name>ports</param-name>
+            <param-value>8444</param-value>
+        </init-param>
+        <init-param>
+            <param-name>maxAssociations</param-name>
+            <param-value>32</param-value>
+        </init-param>
+    </filter>
+    <filter-mapping>
+        <filter-name>push</filter-name>
+        <url-pattern>/*</url-pattern>
+    </filter-mapping>
+
+</web-app>

libraries-server/src/main/webapp/http2.html

@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Baeldung HTTP/2 Client in Jetty</title>
+</head>
+<body>
+    <h2>HTTP/2 Demo</h2>
+    <div>
+        <img src="images/homepage-latest_articles.jpg" alt="latest articles" />
+        <img src="images/homepage-rest_with_spring.jpg" alt="rest with spring" />
+        <img src="images/homepage-weekly_reviews.jpg" alt="weekly reviews" />
+    </div>
+</body>
+</html>

libraries-server/src/main/webapp/index.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Baeldung: HTTP2 Client in Jetty</title>
+</head>
+<body style="margin:100px 200px">
+    <a href="https://localhost:8443/http2.html"><h1>HTTP/1.1</h1></a>
+    <br />
+    <a href="https://localhost:8444/http2.html"><h1>HTTP/2 Push</h1></a>
+    <br />
+</body>
+</html>