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| 1 | +/* |
| 2 | + * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"). |
| 5 | + * You may not use this file except in compliance with the License. |
| 6 | + * A copy of the License is located at |
| 7 | + * |
| 8 | + * http://aws.amazon.com/apache2.0 |
| 9 | + * |
| 10 | + * or in the "license" file accompanying this file. This file is distributed |
| 11 | + * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
| 12 | + * express or implied. See the License for the specific language governing |
| 13 | + * permissions and limitations under the License. |
| 14 | + */ |
| 15 | + |
| 16 | +package software.amazon.awssdk.http.nio.netty.fault; |
| 17 | + |
| 18 | +import static org.assertj.core.api.Assertions.assertThatThrownBy; |
| 19 | +import static software.amazon.awssdk.http.SdkHttpConfigurationOption.TRUST_ALL_CERTIFICATES; |
| 20 | + |
| 21 | +import io.netty.bootstrap.ServerBootstrap; |
| 22 | +import io.netty.channel.Channel; |
| 23 | +import io.netty.channel.ChannelInitializer; |
| 24 | +import io.netty.channel.ChannelPipeline; |
| 25 | +import io.netty.channel.nio.NioEventLoopGroup; |
| 26 | +import io.netty.channel.socket.ServerSocketChannel; |
| 27 | +import io.netty.channel.socket.nio.NioServerSocketChannel; |
| 28 | +import io.netty.handler.ssl.SslContext; |
| 29 | +import io.netty.handler.ssl.SslContextBuilder; |
| 30 | +import io.netty.handler.ssl.util.SelfSignedCertificate; |
| 31 | +import java.io.IOException; |
| 32 | +import java.nio.ByteBuffer; |
| 33 | +import java.time.Duration; |
| 34 | +import java.util.Optional; |
| 35 | +import java.util.concurrent.CompletableFuture; |
| 36 | +import java.util.concurrent.ExecutionException; |
| 37 | +import java.util.concurrent.TimeUnit; |
| 38 | +import java.util.concurrent.TimeoutException; |
| 39 | +import org.junit.jupiter.api.AfterEach; |
| 40 | +import org.junit.jupiter.api.BeforeEach; |
| 41 | +import org.junit.jupiter.api.Test; |
| 42 | +import org.reactivestreams.Publisher; |
| 43 | +import org.reactivestreams.Subscriber; |
| 44 | +import org.reactivestreams.Subscription; |
| 45 | +import software.amazon.awssdk.http.Protocol; |
| 46 | +import software.amazon.awssdk.http.SdkHttpFullRequest; |
| 47 | +import software.amazon.awssdk.http.SdkHttpMethod; |
| 48 | +import software.amazon.awssdk.http.SdkHttpResponse; |
| 49 | +import software.amazon.awssdk.http.async.AsyncExecuteRequest; |
| 50 | +import software.amazon.awssdk.http.async.SdkAsyncHttpClient; |
| 51 | +import software.amazon.awssdk.http.async.SdkAsyncHttpResponseHandler; |
| 52 | +import software.amazon.awssdk.http.async.SdkHttpContentPublisher; |
| 53 | +import software.amazon.awssdk.http.nio.netty.NettyNioAsyncHttpClient; |
| 54 | +import software.amazon.awssdk.http.nio.netty.SdkEventLoopGroup; |
| 55 | +import software.amazon.awssdk.utils.AttributeMap; |
| 56 | + |
| 57 | +/** |
| 58 | + * Tests that the write idle timeout handler detects when no request body data is written |
| 59 | + * and proactively closes the connection. |
| 60 | + */ |
| 61 | +public class WriteIdleTimeoutTest { |
| 62 | + |
| 63 | + private SdkAsyncHttpClient netty; |
| 64 | + private Server server; |
| 65 | + |
| 66 | + @BeforeEach |
| 67 | + public void setup() throws Exception { |
| 68 | + server = new Server(); |
| 69 | + server.init(); |
| 70 | + |
| 71 | + netty = NettyNioAsyncHttpClient.builder() |
| 72 | + .writeTimeout(Duration.ofMillis(500)) |
| 73 | + .readTimeout(Duration.ofSeconds(5)) |
| 74 | + .eventLoopGroup(SdkEventLoopGroup.builder().numberOfThreads(2).build()) |
| 75 | + .protocol(Protocol.HTTP1_1) |
| 76 | + .buildWithDefaults(AttributeMap.builder() |
| 77 | + .put(TRUST_ALL_CERTIFICATES, true) |
| 78 | + .build()); |
| 79 | + } |
| 80 | + |
| 81 | + @AfterEach |
| 82 | + public void teardown() throws InterruptedException { |
| 83 | + if (server != null) { |
| 84 | + server.shutdown(); |
| 85 | + } |
| 86 | + if (netty != null) { |
| 87 | + netty.close(); |
| 88 | + } |
| 89 | + } |
| 90 | + |
| 91 | + /** |
| 92 | + * A request body publisher that subscribes but never produces any data, simulating |
| 93 | + * the thread starvation scenario from the customer issue. |
| 94 | + */ |
| 95 | + @Test |
| 96 | + public void stalledBodyPublisher_shouldTriggerWriteIdleTimeout() throws InterruptedException, TimeoutException { |
| 97 | + SdkHttpFullRequest request = SdkHttpFullRequest.builder() |
| 98 | + .method(SdkHttpMethod.PUT) |
| 99 | + .protocol("https") |
| 100 | + .host("localhost") |
| 101 | + .port(server.port()) |
| 102 | + .putHeader("Content-Length", "1024") |
| 103 | + .build(); |
| 104 | + |
| 105 | + CompletableFuture<Void> future = sendRequest(request, new NeverWritesContentPublisher(1024)); |
| 106 | + |
| 107 | + assertThatThrownBy(() -> future.get(5, TimeUnit.SECONDS)) |
| 108 | + .hasCauseInstanceOf(IOException.class) |
| 109 | + .hasStackTraceContaining("No data was written to the request body within 500ms"); |
| 110 | + } |
| 111 | + |
| 112 | + private CompletableFuture<Void> sendRequest(SdkHttpFullRequest request, SdkHttpContentPublisher contentPublisher) { |
| 113 | + return netty.execute(AsyncExecuteRequest.builder() |
| 114 | + .responseHandler(new SdkAsyncHttpResponseHandler() { |
| 115 | + @Override |
| 116 | + public void onHeaders(SdkHttpResponse headers) { |
| 117 | + } |
| 118 | + |
| 119 | + @Override |
| 120 | + public void onStream(Publisher<ByteBuffer> stream) { |
| 121 | + } |
| 122 | + |
| 123 | + @Override |
| 124 | + public void onError(Throwable error) { |
| 125 | + } |
| 126 | + }) |
| 127 | + .request(request) |
| 128 | + .requestContentPublisher(contentPublisher) |
| 129 | + .build()); |
| 130 | + } |
| 131 | + |
| 132 | + /** |
| 133 | + * A content publisher that accepts a subscription but never calls onNext/onComplete, |
| 134 | + * simulating a stalled body write. |
| 135 | + */ |
| 136 | + private static class NeverWritesContentPublisher implements SdkHttpContentPublisher { |
| 137 | + private final long contentLength; |
| 138 | + |
| 139 | + NeverWritesContentPublisher(long contentLength) { |
| 140 | + this.contentLength = contentLength; |
| 141 | + } |
| 142 | + |
| 143 | + @Override |
| 144 | + public Optional<Long> contentLength() { |
| 145 | + return Optional.of(contentLength); |
| 146 | + } |
| 147 | + |
| 148 | + @Override |
| 149 | + public void subscribe(Subscriber<? super ByteBuffer> s) { |
| 150 | + // Request subscription but never produce data |
| 151 | + s.onSubscribe(new Subscription() { |
| 152 | + @Override |
| 153 | + public void request(long n) { |
| 154 | + // intentionally do nothing |
| 155 | + } |
| 156 | + |
| 157 | + @Override |
| 158 | + public void cancel() { |
| 159 | + } |
| 160 | + }); |
| 161 | + } |
| 162 | + } |
| 163 | + |
| 164 | + private static class Server extends ChannelInitializer<Channel> { |
| 165 | + private ServerBootstrap bootstrap; |
| 166 | + private ServerSocketChannel serverSock; |
| 167 | + private final NioEventLoopGroup group = new NioEventLoopGroup(); |
| 168 | + private SslContext sslCtx; |
| 169 | + |
| 170 | + void init() throws Exception { |
| 171 | + SelfSignedCertificate ssc = new SelfSignedCertificate(); |
| 172 | + sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey()).build(); |
| 173 | + |
| 174 | + bootstrap = new ServerBootstrap() |
| 175 | + .channel(NioServerSocketChannel.class) |
| 176 | + .group(group) |
| 177 | + .childHandler(this); |
| 178 | + |
| 179 | + serverSock = (ServerSocketChannel) bootstrap.bind(0).sync().channel(); |
| 180 | + } |
| 181 | + |
| 182 | + @Override |
| 183 | + protected void initChannel(Channel ch) { |
| 184 | + ChannelPipeline pipeline = ch.pipeline(); |
| 185 | + pipeline.addLast(sslCtx.newHandler(ch.alloc())); |
| 186 | + } |
| 187 | + |
| 188 | + void shutdown() throws InterruptedException { |
| 189 | + group.shutdownGracefully().await(); |
| 190 | + serverSock.close(); |
| 191 | + } |
| 192 | + |
| 193 | + int port() { |
| 194 | + return serverSock.localAddress().getPort(); |
| 195 | + } |
| 196 | + |
| 197 | + } |
| 198 | +} |
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