| /* |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.hc.core5.http.examples; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.SocketException; |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.hc.core5.http.EntityDetails; |
| import org.apache.hc.core5.http.Header; |
| import org.apache.hc.core5.http.HttpConnection; |
| import org.apache.hc.core5.http.HttpException; |
| import org.apache.hc.core5.http.HttpRequest; |
| import org.apache.hc.core5.http.HttpResponse; |
| import org.apache.hc.core5.http.HttpStatus; |
| import org.apache.hc.core5.http.URIScheme; |
| import org.apache.hc.core5.http.impl.Http1StreamListener; |
| import org.apache.hc.core5.http.impl.bootstrap.AsyncServerBootstrap; |
| import org.apache.hc.core5.http.impl.bootstrap.HttpAsyncServer; |
| import org.apache.hc.core5.http.message.BasicHttpResponse; |
| import org.apache.hc.core5.http.message.RequestLine; |
| import org.apache.hc.core5.http.message.StatusLine; |
| import org.apache.hc.core5.http.nio.AsyncServerExchangeHandler; |
| import org.apache.hc.core5.http.nio.CapacityChannel; |
| import org.apache.hc.core5.http.nio.DataStreamChannel; |
| import org.apache.hc.core5.http.nio.ResponseChannel; |
| import org.apache.hc.core5.http.protocol.HttpContext; |
| import org.apache.hc.core5.io.CloseMode; |
| import org.apache.hc.core5.reactor.IOReactorConfig; |
| import org.apache.hc.core5.reactor.ListenerEndpoint; |
| import org.apache.hc.core5.util.TimeValue; |
| |
| /** |
| * Example of full-duplex, streaming HTTP message exchanges with an asynchronous embedded HTTP/1.1 server. |
| */ |
| public class AsyncFullDuplexServerExample { |
| |
| public static void main(final String[] args) throws Exception { |
| int port = 8080; |
| if (args.length >= 1) { |
| port = Integer.parseInt(args[0]); |
| } |
| |
| final IOReactorConfig config = IOReactorConfig.custom() |
| .setSoTimeout(15, TimeUnit.SECONDS) |
| .setTcpNoDelay(true) |
| .build(); |
| |
| final HttpAsyncServer server = AsyncServerBootstrap.bootstrap() |
| .setIOReactorConfig(config) |
| .setStreamListener(new Http1StreamListener() { |
| |
| @Override |
| public void onRequestHead(final HttpConnection connection, final HttpRequest request) { |
| System.out.println(connection.getRemoteAddress() + " " + new RequestLine(request)); |
| } |
| |
| @Override |
| public void onResponseHead(final HttpConnection connection, final HttpResponse response) { |
| System.out.println(connection.getRemoteAddress() + " " + new StatusLine(response)); |
| } |
| |
| @Override |
| public void onExchangeComplete(final HttpConnection connection, final boolean keepAlive) { |
| if (keepAlive) { |
| System.out.println(connection.getRemoteAddress() + " exchange completed (connection kept alive)"); |
| } else { |
| System.out.println(connection.getRemoteAddress() + " exchange completed (connection closed)"); |
| } |
| } |
| |
| }) |
| .register("/echo", () -> new AsyncServerExchangeHandler() { |
| |
| ByteBuffer buffer = ByteBuffer.allocate(2048); |
| CapacityChannel inputCapacityChannel; |
| DataStreamChannel outputDataChannel; |
| boolean endStream; |
| |
| private void ensureCapacity(final int chunk) { |
| if (buffer.remaining() < chunk) { |
| final ByteBuffer oldBuffer = buffer; |
| oldBuffer.flip(); |
| buffer = ByteBuffer.allocate(oldBuffer.remaining() + (chunk > 2048 ? chunk : 2048)); |
| buffer.put(oldBuffer); |
| } |
| } |
| |
| @Override |
| public void handleRequest( |
| final HttpRequest request, |
| final EntityDetails entityDetails, |
| final ResponseChannel responseChannel, |
| final HttpContext context) throws HttpException, IOException { |
| final HttpResponse response = new BasicHttpResponse(HttpStatus.SC_OK); |
| responseChannel.sendResponse(response, entityDetails, context); |
| } |
| |
| @Override |
| public void consume(final ByteBuffer src) throws IOException { |
| if (buffer.position() == 0) { |
| if (outputDataChannel != null) { |
| outputDataChannel.write(src); |
| } |
| } |
| if (src.hasRemaining()) { |
| ensureCapacity(src.remaining()); |
| buffer.put(src); |
| if (outputDataChannel != null) { |
| outputDataChannel.requestOutput(); |
| } |
| } |
| } |
| |
| @Override |
| public void updateCapacity(final CapacityChannel capacityChannel) throws IOException { |
| if (buffer.hasRemaining()) { |
| capacityChannel.update(buffer.remaining()); |
| inputCapacityChannel = null; |
| } else { |
| inputCapacityChannel = capacityChannel; |
| } |
| } |
| |
| @Override |
| public void streamEnd(final List<? extends Header> trailers) throws IOException { |
| endStream = true; |
| if (buffer.position() == 0) { |
| if (outputDataChannel != null) { |
| outputDataChannel.endStream(); |
| } |
| } else { |
| if (outputDataChannel != null) { |
| outputDataChannel.requestOutput(); |
| } |
| } |
| } |
| |
| @Override |
| public int available() { |
| return buffer.position(); |
| } |
| |
| @Override |
| public void produce(final DataStreamChannel channel) throws IOException { |
| outputDataChannel = channel; |
| buffer.flip(); |
| if (buffer.hasRemaining()) { |
| channel.write(buffer); |
| } |
| buffer.compact(); |
| if (buffer.position() == 0 && endStream) { |
| channel.endStream(); |
| } |
| final CapacityChannel capacityChannel = inputCapacityChannel; |
| if (capacityChannel != null && buffer.hasRemaining()) { |
| capacityChannel.update(buffer.remaining()); |
| } |
| } |
| |
| @Override |
| public void failed(final Exception cause) { |
| if (!(cause instanceof SocketException)) { |
| cause.printStackTrace(System.out); |
| } |
| } |
| |
| @Override |
| public void releaseResources() { |
| } |
| |
| }) |
| .create(); |
| |
| Runtime.getRuntime().addShutdownHook(new Thread(() -> { |
| System.out.println("HTTP server shutting down"); |
| server.close(CloseMode.GRACEFUL); |
| })); |
| |
| server.start(); |
| final Future<ListenerEndpoint> future = server.listen(new InetSocketAddress(port), URIScheme.HTTP); |
| final ListenerEndpoint listenerEndpoint = future.get(); |
| System.out.print("Listening on " + listenerEndpoint.getAddress()); |
| server.awaitShutdown(TimeValue.MAX_VALUE); |
| } |
| |
| } |