| /* |
| * ==================================================================== |
| * 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.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.hc.core5.http.EntityDetails; |
| 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.Message; |
| import org.apache.hc.core5.http.URIScheme; |
| import org.apache.hc.core5.http.impl.bootstrap.AsyncServerBootstrap; |
| import org.apache.hc.core5.http.impl.bootstrap.HttpAsyncServer; |
| import org.apache.hc.core5.http.impl.bootstrap.StandardFilter; |
| import org.apache.hc.core5.http.message.BasicHttpResponse; |
| import org.apache.hc.core5.http.nio.AsyncEntityProducer; |
| import org.apache.hc.core5.http.nio.AsyncFilterChain; |
| import org.apache.hc.core5.http.nio.AsyncPushProducer; |
| import org.apache.hc.core5.http.nio.AsyncRequestConsumer; |
| import org.apache.hc.core5.http.nio.AsyncServerRequestHandler; |
| import org.apache.hc.core5.http.nio.entity.AsyncEntityProducers; |
| import org.apache.hc.core5.http.nio.entity.StringAsyncEntityConsumer; |
| import org.apache.hc.core5.http.nio.support.AbstractAsyncServerAuthFilter; |
| import org.apache.hc.core5.http.nio.support.AsyncResponseBuilder; |
| import org.apache.hc.core5.http.nio.support.BasicRequestConsumer; |
| import org.apache.hc.core5.http.protocol.HttpContext; |
| import org.apache.hc.core5.io.CloseMode; |
| import org.apache.hc.core5.net.URIAuthority; |
| import org.apache.hc.core5.reactor.IOReactorConfig; |
| import org.apache.hc.core5.reactor.ListenerEndpoint; |
| import org.apache.hc.core5.util.TimeValue; |
| |
| /** |
| * Example of using asynchronous I/O request filters with an embedded HTTP/1.1 server. |
| */ |
| public class AsyncServerFilterExample { |
| |
| 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) |
| |
| // Replace standard expect-continue handling with a custom auth filter |
| |
| .replaceFilter(StandardFilter.EXPECT_CONTINUE.name(), new AbstractAsyncServerAuthFilter<String>(true) { |
| |
| @Override |
| protected String parseChallengeResponse( |
| final String authorizationValue, final HttpContext context) throws HttpException { |
| return authorizationValue; |
| } |
| |
| @Override |
| protected boolean authenticate( |
| final String challengeResponse, |
| final URIAuthority authority, |
| final String requestUri, |
| final HttpContext context) { |
| return "let me pass".equals(challengeResponse); |
| } |
| |
| @Override |
| protected String generateChallenge( |
| final String challengeResponse, |
| final URIAuthority authority, |
| final String requestUri, |
| final HttpContext context) { |
| return "who goes there?"; |
| } |
| |
| }) |
| |
| // Add a custom request filter at the beginning of the processing pipeline |
| |
| .addFilterFirst("my-filter", (request, entityDetails, context, responseTrigger, chain) -> { |
| if (request.getRequestUri().equals("/back-door")) { |
| responseTrigger.submitResponse( |
| new BasicHttpResponse(HttpStatus.SC_OK), |
| AsyncEntityProducers.create("Welcome")); |
| return null; |
| } |
| return chain.proceed(request, entityDetails, context, new AsyncFilterChain.ResponseTrigger() { |
| |
| @Override |
| public void sendInformation( |
| final HttpResponse response) throws HttpException, IOException { |
| responseTrigger.sendInformation(response); |
| } |
| |
| @Override |
| public void submitResponse( |
| final HttpResponse response, final AsyncEntityProducer entityProducer) throws HttpException, IOException { |
| response.addHeader("X-Filter", "My-Filter"); |
| responseTrigger.submitResponse(response, entityProducer); |
| } |
| |
| @Override |
| public void pushPromise( |
| final HttpRequest promise, final AsyncPushProducer responseProducer) throws HttpException, IOException { |
| responseTrigger.pushPromise(promise, responseProducer); |
| } |
| |
| }); |
| }) |
| |
| // Application request handler |
| |
| .register("*", new AsyncServerRequestHandler<Message<HttpRequest, String>>() { |
| |
| @Override |
| public AsyncRequestConsumer<Message<HttpRequest, String>> prepare( |
| final HttpRequest request, |
| final EntityDetails entityDetails, |
| final HttpContext context) throws HttpException { |
| return new BasicRequestConsumer<>(entityDetails != null ? new StringAsyncEntityConsumer() : null); |
| } |
| |
| @Override |
| public void handle( |
| final Message<HttpRequest, String> requestMessage, |
| final ResponseTrigger responseTrigger, |
| final HttpContext context) throws HttpException, IOException { |
| // do something useful |
| responseTrigger.submitResponse( |
| AsyncResponseBuilder.create(HttpStatus.SC_OK) |
| .setEntity("Hello") |
| .build(), |
| context); |
| } |
| }) |
| .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); |
| } |
| |
| } |