Java tutorial
/* * 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.Collection; import java.util.HashMap; import java.util.Map; import java.util.concurrent.LinkedBlockingDeque; import javax.ws.rs.core.SecurityContext; import io.netty.buffer.ByteBuf; import io.netty.buffer.ByteBufInputStream; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelInboundHandlerAdapter; import io.netty.handler.codec.http.DefaultFullHttpResponse; import io.netty.handler.codec.http.HttpContent; import io.netty.handler.codec.http.HttpHeaderNames; import io.netty.handler.codec.http.HttpRequest; import io.netty.handler.codec.http.HttpResponseStatus; import io.netty.handler.codec.http.HttpUtil; import io.netty.handler.codec.http.HttpVersion; import io.netty.handler.codec.http.LastHttpContent; 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; /** * {@link io.netty.channel.ChannelInboundHandler} which servers as a bridge * between Netty and Jersey. * * @author Pavel Bucek (pavel.bucek at oracle.com) */ class JerseyServerHandler extends ChannelInboundHandlerAdapter { 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. */ public JerseyServerHandler(URI baseUri, NettyHttpContainer container) { this.baseUri = baseUri; this.container = container; } @Override public void channelRead(final ChannelHandlerContext ctx, Object msg) { if (msg instanceof HttpRequest) { final HttpRequest req = (HttpRequest) msg; if (HttpUtil.is100ContinueExpected(req)) { ctx.write(new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.CONTINUE)); } isList.clear(); // clearing the content - possible leftover from previous request processing. final ContainerRequest requestContext = createContainerRequest(ctx, req); requestContext.setWriter(new NettyResponseWriter(ctx, req, 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); } }); } if (msg instanceof HttpContent) { HttpContent httpContent = (HttpContent) msg; ByteBuf content = httpContent.content(); if (content.isReadable()) { isList.add(new ByteBufInputStream(content)); } if (msg instanceof LastHttpContent) { isList.add(NettyInputStream.END_OF_INPUT); } } } /** * Create Jersey {@link ContainerRequest} based on Netty {@link HttpRequest}. * * @param ctx Netty channel context. * @param req Netty Http request. * @return created Jersey Container Request. */ private ContainerRequest createContainerRequest(ChannelHandlerContext ctx, HttpRequest req) { String s = req.uri().startsWith("/") ? req.uri().substring(1) : req.uri(); URI requestUri = URI.create(baseUri + ContainerUtils.encodeUnsafeCharacters(s)); ContainerRequest requestContext = new ContainerRequest(baseUri, requestUri, req.method().name(), 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 ((req.headers().contains(HttpHeaderNames.CONTENT_LENGTH) && HttpUtil.getContentLength(req) > 0) || HttpUtil.isTransferEncodingChunked(req)) { 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 (String name : req.headers().names()) { requestContext.headers(name, req.headers().getAll(name)); } return requestContext; } 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; } }; } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { ctx.close(); } }