Experimental container support for HTTP/2.

Change-Id: Ieaa5926c23720fe86cdbfd9e469aa744de94291a
(cherry picked from commit f7f10e9)

Author: pavelbucek

containers/netty-http/src/main/java/org/glassfish/jersey/netty/httpserver/HttpVersionChooser.java

@@ -0,0 +1,85 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright (c) 2016 Oracle and/or its affiliates. All rights reserved.
+ *
+ * The contents of this file are subject to the terms of either the GNU
+ * General Public License Version 2 only ("GPL") or the Common Development
+ * and Distribution License("CDDL") (collectively, the "License").  You
+ * may not use this file except in compliance with the License.  You can
+ * obtain a copy of the License at
+ * http://glassfish.java.net/public/CDDL+GPL_1_1.html
+ * or packager/legal/LICENSE.txt.  See the License for the specific
+ * language governing permissions and limitations under the License.
+ *
+ * When distributing the software, include this License Header Notice in each
+ * file and include the License file at packager/legal/LICENSE.txt.
+ *
+ * GPL Classpath Exception:
+ * Oracle designates this particular file as subject to the "Classpath"
+ * exception as provided by Oracle in the GPL Version 2 section of the License
+ * file that accompanied this code.
+ *
+ * Modifications:
+ * If applicable, add the following below the License Header, with the fields
+ * enclosed by brackets [] replaced by your own identifying information:
+ * "Portions Copyright [year] [name of copyright owner]"
+ *
+ * Contributor(s):
+ * If you wish your version of this file to be governed by only the CDDL or
+ * only the GPL Version 2, indicate your decision by adding "[Contributor]
+ * elects to include this software in this distribution under the [CDDL or GPL
+ * Version 2] license."  If you don't indicate a single choice of license, a
+ * recipient has the option to distribute your version of this file under
+ * either the CDDL, the GPL Version 2 or to extend the choice of license to
+ * its licensees as provided above.  However, if you add GPL Version 2 code
+ * and therefore, elected the GPL Version 2 license, then the option applies
+ * only if the new code is made subject to such option by the copyright
+ * holder.
+ */
+
+package org.glassfish.jersey.netty.httpserver;
+
+import java.net.URI;
+
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.http.HttpServerCodec;
+import io.netty.handler.codec.http2.Http2Codec;
+import io.netty.handler.ssl.ApplicationProtocolNames;
+import io.netty.handler.ssl.ApplicationProtocolNegotiationHandler;
+import io.netty.handler.stream.ChunkedWriteHandler;
+
+/**
+ * Choose the handler implementation based on Http protocol.
+ *
+ * @author Pavel Bucek (pavel.bucek at oracle.com)
+ */
+class HttpVersionChooser extends ApplicationProtocolNegotiationHandler {
+
+    private final URI baseUri;
+    private final NettyHttpContainer container;
+
+    HttpVersionChooser(URI baseUri, NettyHttpContainer container) {
+        super(ApplicationProtocolNames.HTTP_1_1);
+
+        this.baseUri = baseUri;
+        this.container = container;
+    }
+
+    @Override
+    protected void configurePipeline(ChannelHandlerContext ctx, String protocol) throws Exception {
+        if (ApplicationProtocolNames.HTTP_2.equals(protocol)) {
+            ctx.pipeline().addLast(new Http2Codec(true, new JerseyHttp2ServerHandler(baseUri, container)));
+            return;
+        }
+
+        if (ApplicationProtocolNames.HTTP_1_1.equals(protocol)) {
+            ctx.pipeline().addLast(new HttpServerCodec(),
+                                   new ChunkedWriteHandler(),
+                                   new JerseyServerHandler(baseUri, container));
+            return;
+        }
+
+        throw new IllegalStateException("Unknown protocol: " + protocol);
+    }
+}

containers/netty-http/src/main/java/org/glassfish/jersey/netty/httpserver/JerseyHttp2ServerHandler.java

@@ -0,0 +1,242 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright (c) 2016 Oracle and/or its affiliates. All rights reserved.
+ *
+ * The contents of this file are subject to the terms of either the GNU
+ * General Public License Version 2 only ("GPL") or the Common Development
+ * and Distribution License("CDDL") (collectively, the "License").  You
+ * may not use this file except in compliance with the License.  You can
+ * obtain a copy of the License at
+ * http://glassfish.java.net/public/CDDL+GPL_1_1.html
+ * or packager/legal/LICENSE.txt.  See the License for the specific
+ * language governing permissions and limitations under the License.
+ *
+ * When distributing the software, include this License Header Notice in each
+ * file and include the License file at packager/legal/LICENSE.txt.
+ *
+ * GPL Classpath Exception:
+ * Oracle designates this particular file as subject to the "Classpath"
+ * exception as provided by Oracle in the GPL Version 2 section of the License
+ * file that accompanied this code.
+ *
+ * Modifications:
+ * If applicable, add the following below the License Header, with the fields
+ * enclosed by brackets [] replaced by your own identifying information:
+ * "Portions Copyright [year] [name of copyright owner]"
+ *
+ * Contributor(s):
+ * If you wish your version of this file to be governed by only the CDDL or
+ * only the GPL Version 2, indicate your decision by adding "[Contributor]
+ * elects to include this software in this distribution under the [CDDL or GPL
+ * Version 2] license."  If you don't indicate a single choice of license, a
+ * recipient has the option to distribute your version of this file under
+ * either the CDDL, the GPL Version 2 or to extend the choice of license to
+ * its licensees as provided above.  However, if you add GPL Version 2 code
+ * and therefore, elected the GPL Version 2 license, then the option applies
+ * only if the new code is made subject to such option by the copyright
+ * holder.
+ */
+
+package org.glassfish.jersey.netty.httpserver;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.security.Principal;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.LinkedBlockingDeque;
+
+import javax.ws.rs.core.SecurityContext;
+
+import io.netty.buffer.ByteBufInputStream;
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.http.HttpRequest;
+import io.netty.handler.codec.http2.Http2DataFrame;
+import io.netty.handler.codec.http2.Http2HeadersFrame;
+import io.netty.util.concurrent.Future;
+import io.netty.util.concurrent.GenericFutureListener;
+import org.glassfish.jersey.internal.PropertiesDelegate;
+import org.glassfish.jersey.netty.connector.internal.NettyInputStream;
+import org.glassfish.jersey.server.ContainerRequest;
+import org.glassfish.jersey.server.internal.ContainerUtils;
+
+/**
+ * Jersey Netty HTTP/2 handler.
+ * <p>
+ * Note that this implementation cannot be more experimental. Any contributions / feedback is welcomed.
+ *
+ * @author Pavel Bucek (pavel.bucek at oracle.com)
+ */
+@ChannelHandler.Sharable
+class JerseyHttp2ServerHandler extends ChannelDuplexHandler {
+
+    private final URI baseUri;
+    private final LinkedBlockingDeque<InputStream> isList = new LinkedBlockingDeque<>();
+    private final NettyHttpContainer container;
+
+    /**
+     * Constructor.
+     *
+     * @param baseUri   base {@link URI} of the container (includes context path, if any).
+     * @param container Netty container implementation.
+     */
+    JerseyHttp2ServerHandler(URI baseUri, NettyHttpContainer container) {
+        this.baseUri = baseUri;
+        this.container = container;
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+        ctx.close();
+    }
+
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+        if (msg instanceof Http2HeadersFrame) {
+            onHeadersRead(ctx, (Http2HeadersFrame) msg);
+        } else if (msg instanceof Http2DataFrame) {
+            onDataRead(ctx, (Http2DataFrame) msg);
+        } else {
+            super.channelRead(ctx, msg);
+        }
+    }
+
+    /**
+     * Process incoming data.
+     */
+    private void onDataRead(ChannelHandlerContext ctx, Http2DataFrame data) throws Exception {
+        isList.add(new ByteBufInputStream(data.content()));
+        if (data.isEndStream()) {
+            isList.add(NettyInputStream.END_OF_INPUT);
+        }
+    }
+
+    /**
+     * Process incoming request (just a headers in this case, entity is processed separately).
+     */
+    private void onHeadersRead(ChannelHandlerContext ctx, Http2HeadersFrame headers) throws Exception {
+
+        final ContainerRequest requestContext = createContainerRequest(ctx, headers);
+
+        requestContext.setWriter(new NettyHttp2ResponseWriter(ctx, headers, container));
+
+        // must be like this, since there is a blocking read from Jersey
+        container.getExecutorService().execute(new Runnable() {
+            @Override
+            public void run() {
+                container.getApplicationHandler().handle(requestContext);
+            }
+        });
+    }
+
+    /**
+     * Create Jersey {@link ContainerRequest} based on Netty {@link HttpRequest}.
+     *
+     * @param ctx          Netty channel context.
+     * @param http2Headers Netty Http/2 headers.
+     * @return created Jersey Container Request.
+     */
+    private ContainerRequest createContainerRequest(ChannelHandlerContext ctx, Http2HeadersFrame http2Headers) {
+
+        String path = http2Headers.headers().path().toString();
+
+        String s = path.startsWith("/") ? path.substring(1) : path;
+        URI requestUri = URI.create(baseUri + ContainerUtils.encodeUnsafeCharacters(s));
+
+        ContainerRequest requestContext = new ContainerRequest(
+                baseUri, requestUri, http2Headers.headers().method().toString(), getSecurityContext(),
+                new PropertiesDelegate() {
+
+                    private final Map<String, Object> properties = new HashMap<>();
+
+                    @Override
+                    public Object getProperty(String name) {
+                        return properties.get(name);
+                    }
+
+                    @Override
+                    public Collection<String> getPropertyNames() {
+                        return properties.keySet();
+                    }
+
+                    @Override
+                    public void setProperty(String name, Object object) {
+                        properties.put(name, object);
+                    }
+
+                    @Override
+                    public void removeProperty(String name) {
+                        properties.remove(name);
+                    }
+                });
+
+        // request entity handling.
+        if (!http2Headers.isEndStream()) {
+
+            ctx.channel().closeFuture().addListener(new GenericFutureListener<Future<? super Void>>() {
+                @Override
+                public void operationComplete(Future<? super Void> future) throws Exception {
+                    isList.add(NettyInputStream.END_OF_INPUT_ERROR);
+                }
+            });
+
+            requestContext.setEntityStream(new NettyInputStream(isList));
+        } else {
+            requestContext.setEntityStream(new InputStream() {
+                @Override
+                public int read() throws IOException {
+                    return -1;
+                }
+            });
+        }
+
+        // copying headers from netty request to jersey container request context.
+        for (CharSequence name : http2Headers.headers().names()) {
+            requestContext.headers(name.toString(), mapToString(http2Headers.headers().getAll(name)));
+        }
+
+        return requestContext;
+    }
+
+    private List<String> mapToString(List<CharSequence> list) {
+        ArrayList<String> result = new ArrayList<>(list.size());
+
+        for (CharSequence sequence : list) {
+            result.add(sequence.toString());
+        }
+
+        return result;
+    }
+
+    private SecurityContext getSecurityContext() {
+        return new SecurityContext() {
+
+            @Override
+            public boolean isUserInRole(final String role) {
+                return false;
+            }
+
+            @Override
+            public boolean isSecure() {
+                return false;
+            }
+
+            @Override
+            public Principal getUserPrincipal() {
+                return null;
+            }
+
+            @Override
+            public String getAuthenticationScheme() {
+                return null;
+            }
+        };
+    }
+}