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27 package org.apache.hc.core5.http2.examples;
28
29 import java.io.IOException;
30 import java.net.URI;
31 import java.nio.ByteBuffer;
32 import java.util.List;
33 import java.util.concurrent.CountDownLatch;
34 import java.util.concurrent.TimeUnit;
35
36 import org.apache.hc.core5.http.EntityDetails;
37 import org.apache.hc.core5.http.Header;
38 import org.apache.hc.core5.http.HttpConnection;
39 import org.apache.hc.core5.http.HttpException;
40 import org.apache.hc.core5.http.HttpResponse;
41 import org.apache.hc.core5.http.impl.bootstrap.HttpAsyncRequester;
42 import org.apache.hc.core5.http.nio.AsyncClientExchangeHandler;
43 import org.apache.hc.core5.http.nio.AsyncRequestProducer;
44 import org.apache.hc.core5.http.nio.CapacityChannel;
45 import org.apache.hc.core5.http.nio.DataStreamChannel;
46 import org.apache.hc.core5.http.nio.RequestChannel;
47 import org.apache.hc.core5.http.nio.entity.StringAsyncEntityConsumer;
48 import org.apache.hc.core5.http.nio.support.AsyncRequestBuilder;
49 import org.apache.hc.core5.http.nio.support.BasicResponseConsumer;
50 import org.apache.hc.core5.http.protocol.HttpContext;
51 import org.apache.hc.core5.http.protocol.HttpCoreContext;
52 import org.apache.hc.core5.http2.HttpVersionPolicy;
53 import org.apache.hc.core5.http2.config.H2Config;
54 import org.apache.hc.core5.http2.frame.RawFrame;
55 import org.apache.hc.core5.http2.impl.nio.H2StreamListener;
56 import org.apache.hc.core5.http2.impl.nio.bootstrap.H2RequesterBootstrap;
57 import org.apache.hc.core5.io.CloseMode;
58 import org.apache.hc.core5.reactor.IOReactorConfig;
59 import org.apache.hc.core5.util.Timeout;
60
61
62
63
64 public class H2FullDuplexClientExample {
65
66 public static void main(final String[] args) throws Exception {
67
68 final IOReactorConfig ioReactorConfig = IOReactorConfig.custom()
69 .setSoTimeout(5, TimeUnit.SECONDS)
70 .build();
71
72
73 final H2Config h2Config = H2Config.custom()
74 .setPushEnabled(false)
75 .setMaxConcurrentStreams(100)
76 .build();
77 final HttpAsyncRequester requester = H2RequesterBootstrap.bootstrap()
78 .setIOReactorConfig(ioReactorConfig)
79 .setH2Config(h2Config)
80 .setVersionPolicy(HttpVersionPolicy.FORCE_HTTP_2)
81 .setStreamListener(new H2StreamListener() {
82
83 @Override
84 public void onHeaderInput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) {
85 for (int i = 0; i < headers.size(); i++) {
86 System.out.println(connection.getRemoteAddress() + " (" + streamId + ") << " + headers.get(i));
87 }
88 }
89
90 @Override
91 public void onHeaderOutput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) {
92 for (int i = 0; i < headers.size(); i++) {
93 System.out.println(connection.getRemoteAddress() + " (" + streamId + ") >> " + headers.get(i));
94 }
95 }
96
97 @Override
98 public void onFrameInput(final HttpConnection connection, final int streamId, final RawFrame frame) {
99 }
100
101 @Override
102 public void onFrameOutput(final HttpConnection connection, final int streamId, final RawFrame frame) {
103 }
104
105 @Override
106 public void onInputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) {
107 }
108
109 @Override
110 public void onOutputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) {
111 }
112
113 })
114 .create();
115
116 Runtime.getRuntime().addShutdownHook(new Thread(() -> {
117 System.out.println("HTTP requester shutting down");
118 requester.close(CloseMode.GRACEFUL);
119 }));
120 requester.start();
121
122 final URI requestUri = new URI("http://nghttp2.org/httpbin/post");
123 final AsyncRequestProducer requestProducer = AsyncRequestBuilder.post(requestUri)
124 .setEntity("stuff")
125 .build();
126 final BasicResponseConsumer<String> responseConsumer = new BasicResponseConsumer<>(
127 new StringAsyncEntityConsumer());
128
129 final CountDownLatch latch = new CountDownLatch(1);
130 requester.execute(new AsyncClientExchangeHandler() {
131
132 @Override
133 public void releaseResources() {
134 requestProducer.releaseResources();
135 responseConsumer.releaseResources();
136 latch.countDown();
137 }
138
139 @Override
140 public void cancel() {
141 System.out.println(requestUri + " cancelled");
142 }
143
144 @Override
145 public void failed(final Exception cause) {
146 System.out.println(requestUri + "->" + cause);
147 }
148
149 @Override
150 public void produceRequest(final RequestChannel channel, final HttpContext httpContext) throws HttpException, IOException {
151 requestProducer.sendRequest(channel, httpContext);
152 }
153
154 @Override
155 public int available() {
156 return requestProducer.available();
157 }
158
159 @Override
160 public void produce(final DataStreamChannel channel) throws IOException {
161 requestProducer.produce(channel);
162 }
163
164 @Override
165 public void consumeInformation(final HttpResponse response, final HttpContext httpContext) throws HttpException, IOException {
166 System.out.println(requestUri + "->" + response.getCode());
167 }
168
169 @Override
170 public void consumeResponse(final HttpResponse response, final EntityDetails entityDetails, final HttpContext httpContext) throws HttpException, IOException {
171 System.out.println(requestUri + "->" + response.getCode());
172 responseConsumer.consumeResponse(response, entityDetails, httpContext, null);
173 }
174
175 @Override
176 public void updateCapacity(final CapacityChannel capacityChannel) throws IOException {
177 responseConsumer.updateCapacity(capacityChannel);
178 }
179
180 @Override
181 public void consume(final ByteBuffer src) throws IOException {
182 responseConsumer.consume(src);
183 }
184
185 @Override
186 public void streamEnd(final List<? extends Header> trailers) throws HttpException, IOException {
187 responseConsumer.streamEnd(trailers);
188 }
189
190 }, Timeout.ofSeconds(30), HttpCoreContext.create());
191
192 latch.await();
193 System.out.println("Shutting down I/O reactor");
194 requester.initiateShutdown();
195 }
196
197 }