add large response test (#2051)

Author: sullis

client/src/test/java/org/asynchttpclient/LargeResponseTest.java

@@ -0,0 +1,158 @@
+/*
+ *    Copyright (c) 2015-2025 AsyncHttpClient Project. All rights reserved.
+ *
+ *    Licensed 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.
+ */
+package org.asynchttpclient;
+
+import com.sun.net.httpserver.HttpExchange;
+import com.sun.net.httpserver.HttpHandler;
+import com.sun.net.httpserver.HttpServer;
+import io.github.nettyplus.leakdetector.junit.NettyLeakDetectorExtension;
+import io.netty.handler.codec.http.HttpHeaders;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.InetSocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.time.Duration;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+import org.apache.commons.io.FileUtils;
+import org.jetbrains.annotations.Nullable;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+
+@ExtendWith(NettyLeakDetectorExtension.class)
+public class LargeResponseTest {
+    private static final Logger LOG = LoggerFactory.getLogger(LargeResponseTest.class);
+    private static final int textSize = 4 * 1024;
+    private static final byte[] textBytes = "z".repeat(textSize).getBytes(StandardCharsets.UTF_8);
+
+    private static final long responseSize = ((long)textSize) * (1_500_000L);
+
+    private static HttpServer HTTP_SERVER;
+
+    private static AsyncHttpClient createClient() {
+        AsyncHttpClientConfig config = new DefaultAsyncHttpClientConfig.Builder()
+                .setEnableAutomaticDecompression(true)
+                .setCompressionEnforced(true)
+                .setReadTimeout(Duration.ofMinutes(15))
+                .setRequestTimeout(Duration.ofMinutes(15))
+                .setConnectTimeout(Duration.ofSeconds(1))
+                .build();
+        return new DefaultAsyncHttpClient(config);
+    }
+
+    @BeforeAll
+    static void setupServer() throws Exception {
+        HTTP_SERVER = HttpServer.create(new InetSocketAddress(0), 0);
+
+        HTTP_SERVER.createContext("/large").setHandler(new HttpHandler() {
+            @Override
+            public void handle(HttpExchange exchange)
+                    throws IOException {
+                exchange.sendResponseHeaders(200, 0);
+                long bytesWritten = 0;
+                OutputStream out = exchange.getResponseBody();
+                while (bytesWritten < responseSize) {
+                    out.write(textBytes);
+                    out.flush();
+                    bytesWritten += textBytes.length;
+                }
+                out.close();
+            }
+        });
+
+        HTTP_SERVER.start();
+    }
+
+    @AfterAll
+    static void stopServer() {
+        if (HTTP_SERVER != null) {
+            HTTP_SERVER.stop(0);
+        }
+    }
+
+    @Test
+    void handleLargeResponse() throws Throwable {
+        AtomicInteger status = new AtomicInteger(-1);
+        AtomicInteger throwableCount = new AtomicInteger();
+        AtomicLong bytesReceived = new AtomicLong();
+        AtomicLong bodyPartCount = new AtomicLong();
+
+        try (AsyncHttpClient client = createClient()) {
+            Request request = new RequestBuilder("GET")
+                    .setUrl("http://localhost:" + HTTP_SERVER.getAddress().getPort() + "/large")
+                    .build();
+            var future = client.executeRequest(request, new AsyncHandler<Object>() {
+                    @Override
+                    public State onStatusReceived(HttpResponseStatus responseStatus)
+                        throws Exception {
+                        status.set(responseStatus.getStatusCode());
+                        return State.CONTINUE;
+                    }
+
+                    @Override
+                    public State onHeadersReceived(HttpHeaders headers)
+                        throws Exception {
+                        return State.CONTINUE;
+                    }
+
+                    @Override
+                    public State onBodyPartReceived(HttpResponseBodyPart bodyPart)
+                        throws Exception {
+                        bodyPartCount.incrementAndGet();
+                        bytesReceived.addAndGet(bodyPart.length());
+
+                        /*
+                        LOG.info("onBodyPartReceived: "
+                            + "bodyPartCount=" + bodyPartCount.get()
+                            + " bodyPartLength: "
+                            + FileUtils.byteCountToDisplaySize(bodyPart.length()));
+                         */
+
+                        return State.CONTINUE;
+                    }
+
+                    @Override
+                    public void onThrowable(Throwable t) {
+                        throwableCount.incrementAndGet();
+                    }
+
+                    @Override
+                    public @Nullable Object onCompleted()
+                        throws Exception {
+                        return null;
+                    }
+                });
+
+                future.get(1, TimeUnit.MINUTES);
+
+                assertEquals(200, status.get());
+                assertEquals(0, throwableCount.get());
+                assertEquals(responseSize, bytesReceived.get());
+
+                LOG.info("Body part count: " + bodyPartCount);
+                LOG.info("Body part average size: " + FileUtils.byteCountToDisplaySize(responseSize / bodyPartCount.get()));
+                LOG.info("Response size: " + FileUtils.byteCountToDisplaySize(responseSize));
+        }
+    }
+}