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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
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13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
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26   */
27  package org.apache.hc.core5.http2.examples;
28  
29  import java.util.List;
30  import java.util.concurrent.CountDownLatch;
31  import java.util.concurrent.Future;
32  
33  import javax.net.ssl.SSLContext;
34  
35  import org.apache.hc.core5.concurrent.FutureCallback;
36  import org.apache.hc.core5.http.Header;
37  import org.apache.hc.core5.http.HttpConnection;
38  import org.apache.hc.core5.http.HttpHost;
39  import org.apache.hc.core5.http.HttpResponse;
40  import org.apache.hc.core5.http.Message;
41  import org.apache.hc.core5.http.impl.bootstrap.HttpAsyncRequester;
42  import org.apache.hc.core5.http.nio.AsyncClientEndpoint;
43  import org.apache.hc.core5.http.nio.entity.StringAsyncEntityConsumer;
44  import org.apache.hc.core5.http.nio.support.AsyncRequestBuilder;
45  import org.apache.hc.core5.http.nio.support.BasicResponseConsumer;
46  import org.apache.hc.core5.http2.config.H2Config;
47  import org.apache.hc.core5.http2.frame.RawFrame;
48  import org.apache.hc.core5.http2.impl.nio.H2StreamListener;
49  import org.apache.hc.core5.http2.impl.nio.bootstrap.H2RequesterBootstrap;
50  import org.apache.hc.core5.http2.ssl.ConscryptClientTlsStrategy;
51  import org.apache.hc.core5.io.CloseMode;
52  import org.apache.hc.core5.ssl.SSLContexts;
53  import org.apache.hc.core5.util.Timeout;
54  import org.conscrypt.Conscrypt;
55  
56  /**
57   * This example demonstrates how to execute HTTP/2 requests over TLS connections
58   * with Java 1.7 or Java 1.8 and Conscrypt TLS library
59   */
60  public class H2ConscriptRequestExecutionExample {
61  
62      public final static void main(final String[] args) throws Exception {
63  
64          // Create and start requester
65          final H2Config h2Config = H2Config.custom()
66                  .setPushEnabled(false)
67                  .build();
68  
69          final SSLContext sslContext = SSLContexts.custom()
70                  .setProvider(Conscrypt.newProvider())
71                  .build();
72  
73          final HttpAsyncRequester requester = H2RequesterBootstrap.bootstrap()
74                  .setH2Config(h2Config)
75                  .setTlsStrategy(new ConscryptClientTlsStrategy(sslContext))
76                  .setStreamListener(new H2StreamListener() {
77  
78                      @Override
79                      public void onHeaderInput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) {
80                          for (int i = 0; i < headers.size(); i++) {
81                              System.out.println(connection.getRemoteAddress() + " (" + streamId + ") << " + headers.get(i));
82                          }
83                      }
84  
85                      @Override
86                      public void onHeaderOutput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) {
87                          for (int i = 0; i < headers.size(); i++) {
88                              System.out.println(connection.getRemoteAddress() + " (" + streamId + ") >> " + headers.get(i));
89                          }
90                      }
91  
92                      @Override
93                      public void onFrameInput(final HttpConnection connection, final int streamId, final RawFrame frame) {
94                      }
95  
96                      @Override
97                      public void onFrameOutput(final HttpConnection connection, final int streamId, final RawFrame frame) {
98                      }
99  
100                     @Override
101                     public void onInputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) {
102                     }
103 
104                     @Override
105                     public void onOutputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) {
106                     }
107 
108                 })
109                 .create();
110         Runtime.getRuntime().addShutdownHook(new Thread() {
111             @Override
112             public void run() {
113                 System.out.println("HTTP requester shutting down");
114                 requester.close(CloseMode.GRACEFUL);
115             }
116         });
117         requester.start();
118 
119         final HttpHost target = new HttpHost("https", "nghttp2.org", 443);
120         final String[] requestUris = new String[] {"/httpbin/ip", "/httpbin/user-agent", "/httpbin/headers"};
121 
122         final CountDownLatch latch = new CountDownLatch(requestUris.length);
123         for (final String requestUri: requestUris) {
124             final Future<AsyncClientEndpoint> future = requester.connect(target, Timeout.ofDays(5));
125             final AsyncClientEndpoint clientEndpoint = future.get();
126             clientEndpoint.execute(
127                     AsyncRequestBuilder.get()
128                             .setHttpHost(target)
129                             .setPath(requestUri)
130                             .build(),
131                     new BasicResponseConsumer<>(new StringAsyncEntityConsumer()),
132                     new FutureCallback<Message<HttpResponse, String>>() {
133 
134                         @Override
135                         public void completed(final Message<HttpResponse, String> message) {
136                             clientEndpoint.releaseAndReuse();
137                             final HttpResponse response = message.getHead();
138                             final String body = message.getBody();
139                             System.out.println(requestUri + "->" + response.getCode() + " " + response.getVersion());
140                             System.out.println(body);
141                             latch.countDown();
142                         }
143 
144                         @Override
145                         public void failed(final Exception ex) {
146                             clientEndpoint.releaseAndDiscard();
147                             System.out.println(requestUri + "->" + ex);
148                             latch.countDown();
149                         }
150 
151                         @Override
152                         public void cancelled() {
153                             clientEndpoint.releaseAndDiscard();
154                             System.out.println(requestUri + " cancelled");
155                             latch.countDown();
156                         }
157 
158                     });
159         }
160 
161         latch.await();
162         System.out.println("Shutting down I/O reactor");
163         requester.initiateShutdown();
164     }
165 
166 }