http-client-branch: Import of 8195823: Buffers given to response body subscribers should not contain unprocessed HTTP data
--- a/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/ResponseContent.java Mon Jan 22 17:29:07 2018 +0000
+++ b/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/ResponseContent.java Tue Jan 23 13:21:59 2018 +0000
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -307,7 +307,7 @@
int bytes2return = Math.min(bytesread, unfulfilled);
debug.log(Level.DEBUG, "Returning chunk bytes: %d", bytes2return);
- returnBuffer = Utils.slice(chunk, bytes2return);
+ returnBuffer = Utils.sliceWithLimitedCapacity(chunk, bytes2return);
unfulfilled = bytesremaining -= bytes2return;
if (unfulfilled == 0) bytesToConsume = 2;
}
@@ -439,7 +439,7 @@
assert hasDemand;
int amount = Math.min(b.remaining(), unfulfilled);
unfulfilled = remaining -= amount;
- ByteBuffer buffer = Utils.slice(b, amount);
+ ByteBuffer buffer = Utils.sliceWithLimitedCapacity(b, amount);
pusher.onNext(List.of(buffer));
}
if (unfulfilled == 0) {
--- a/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/Stream.java Mon Jan 22 17:29:07 2018 +0000
+++ b/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/Stream.java Tue Jan 23 13:21:59 2018 +0000
@@ -765,7 +765,7 @@
// blocks waiting for stream send window, if exhausted
int actualAmount = windowController.tryAcquire(requestAmount, streamid, this);
if (actualAmount <= 0) return null;
- ByteBuffer outBuf = Utils.slice(buffer, actualAmount);
+ ByteBuffer outBuf = Utils.sliceWithLimitedCapacity(buffer, actualAmount);
DataFrame df = new DataFrame(streamid, 0 , outBuf);
return df;
}
--- a/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/common/Utils.java Mon Jan 22 17:29:07 2018 +0000
+++ b/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/common/Utils.java Tue Jan 23 13:21:59 2018 +0000
@@ -475,10 +475,28 @@
public static final List<ByteBuffer> EMPTY_BB_LIST = List.of();
public static final ByteBufferReference[] EMPTY_BBR_ARRAY = new ByteBufferReference[0];
- public static ByteBuffer slice(ByteBuffer buffer, int amount) {
+ /**
+ * Returns a slice of size {@code amount} from the given buffer. If the
+ * buffer contains more data than {@code amount}, then the slice's capacity
+ * ( and, but not just, its limit ) is set to {@code amount}. If the buffer
+ * does not contain more data than {@code amount}, then the slice's capacity
+ * will be the same as the given buffer's capacity.
+ */
+ public static ByteBuffer sliceWithLimitedCapacity(ByteBuffer buffer, int amount) {
+ final int index = buffer.position() + amount;
+ final int limit = buffer.limit();
+ if (index != limit) {
+ // additional data in the buffer
+ buffer.limit(index); // ensures that the slice does not go beyond
+ } else {
+ // no additional data in the buffer
+ buffer.limit(buffer.capacity()); // allows the slice full capacity
+ }
+
ByteBuffer newb = buffer.slice();
- newb.limit(amount);
- buffer.position(buffer.position() + amount);
+ buffer.position(index);
+ buffer.limit(limit); // restore the original buffer's limit
+ newb.limit(amount); // slices limit to amount (capacity may be greater)
return newb;
}
--- a/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/frame/FramesDecoder.java Mon Jan 22 17:29:07 2018 +0000
+++ b/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/frame/FramesDecoder.java Tue Jan 23 13:21:59 2018 +0000
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -281,14 +281,14 @@
int extract = Math.min(remaining, bytecount);
ByteBuffer extractedBuf;
if (isDataFrame) {
- extractedBuf = Utils.slice(currentBuffer, extract);
+ extractedBuf = Utils.sliceWithLimitedCapacity(currentBuffer, extract);
slicedToDataFrame = true;
} else {
// Header frames here
// HPACK decoding should performed under lock and immediately after frame decoding.
// in that case it is safe to release original buffer,
// because of sliced buffer has a very short life
- extractedBuf = Utils.slice(currentBuffer, extract);
+ extractedBuf = Utils.sliceWithLimitedCapacity(currentBuffer, extract);
}
res.add(extractedBuf);
bytecount -= extract;
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/net/httpclient/ConcurrentResponses.java Tue Jan 23 13:21:59 2018 +0000
@@ -0,0 +1,377 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8195823
+ * @summary Buffers given to response body subscribers should not contain
+ * unprocessed HTTP data
+ * @modules java.base/sun.net.www.http
+ * jdk.incubator.httpclient/jdk.incubator.http.internal.common
+ * jdk.incubator.httpclient/jdk.incubator.http.internal.frame
+ * jdk.incubator.httpclient/jdk.incubator.http.internal.hpack
+ * java.logging
+ * jdk.httpserver
+ * @library /lib/testlibrary http2/server
+ * @build Http2TestServer
+ * @build jdk.testlibrary.SimpleSSLContext
+ * @run testng/othervm -Djdk.internal.httpclient.debug=true ConcurrentResponses
+ */
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.InetSocketAddress;
+import java.net.URI;
+import java.nio.ByteBuffer;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Flow;
+import java.util.stream.IntStream;
+import javax.net.ssl.SSLContext;
+import com.sun.net.httpserver.HttpExchange;
+import com.sun.net.httpserver.HttpHandler;
+import com.sun.net.httpserver.HttpServer;
+import com.sun.net.httpserver.HttpsConfigurator;
+import com.sun.net.httpserver.HttpsServer;
+import jdk.incubator.http.HttpClient;
+import jdk.incubator.http.HttpRequest;
+import jdk.incubator.http.HttpResponse;
+import jdk.incubator.http.HttpResponse.BodyHandler;
+import jdk.incubator.http.HttpResponse.BodySubscriber;
+import jdk.testlibrary.SimpleSSLContext;
+import org.testng.annotations.AfterTest;
+import org.testng.annotations.BeforeTest;
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static jdk.incubator.http.HttpResponse.BodyHandler.asString;
+import static jdk.incubator.http.HttpResponse.BodyHandler.discard;
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.fail;
+
+public class ConcurrentResponses {
+
+ SSLContext sslContext;
+ HttpServer httpTestServer; // HTTP/1.1 [ 4 servers ]
+ HttpsServer httpsTestServer; // HTTPS/1.1
+ Http2TestServer http2TestServer; // HTTP/2 ( h2c )
+ Http2TestServer https2TestServer; // HTTP/2 ( h2 )
+ String httpFixedURI, httpsFixedURI, httpChunkedURI, httpsChunkedURI;
+ String http2FixedURI, https2FixedURI, http2VariableURI, https2VariableURI;
+
+ static final int CONCURRENT_REQUESTS = 13;
+
+ static final String ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+ static final int ALPHABET_LENGTH = ALPHABET.length();
+
+ static final String stringOfLength(int requiredLength) {
+ StringBuilder sb = new StringBuilder(requiredLength);
+ IntStream.range(0, requiredLength)
+ .mapToObj(i -> ALPHABET.charAt(i % ALPHABET_LENGTH))
+ .forEach(c -> sb.append(c));
+ return sb.toString();
+ }
+
+ /** An array of different Strings, to be used as bodies. */
+ static final String[] BODIES = bodies();
+
+ static String[] bodies() {
+ String[] bodies = new String[CONCURRENT_REQUESTS];
+ for (int i=0;i<CONCURRENT_REQUESTS; i++) {
+ // slightly, but still, different bodies
+ bodies[i] = "Request-" + i + "-body-" + stringOfLength((1024) + i);
+ }
+ return bodies;
+ }
+
+ /**
+ * Asserts the given response's status code is 200.
+ * Returns a CF that completes with the given response.
+ */
+ static final <T> CompletionStage<HttpResponse<T>>
+ assert200ResponseCode(HttpResponse<T> response) {
+ assertEquals(response.statusCode(), 200);
+ return CompletableFuture.completedFuture(response);
+ }
+
+ /**
+ * Asserts that the given response's body is equal to the given body.
+ * Returns a CF that completes with the given response.
+ */
+ static final <T> CompletionStage<HttpResponse<T>>
+ assertbody(HttpResponse<T> response, T body) {
+ assertEquals(response.body(), body);
+ return CompletableFuture.completedFuture(response);
+ }
+
+ @DataProvider(name = "uris")
+ public Object[][] variants() {
+ return new Object[][]{
+ { httpFixedURI },
+ { httpsFixedURI },
+ { httpChunkedURI },
+ { httpsChunkedURI },
+ { http2FixedURI },
+ { https2FixedURI },
+ { http2VariableURI },
+ { https2VariableURI }
+ };
+ }
+
+
+ // The asString implementation accumulates data, below a certain threshold
+ // into the byte buffers it is given.
+ @Test(dataProvider = "uris")
+ void testAsString(String uri) throws Exception {
+ HttpClient client = HttpClient.newBuilder().sslContext(sslContext).build();
+
+ Map<HttpRequest, String> requests = new HashMap<>();
+ for (int i=0;i<CONCURRENT_REQUESTS; i++) {
+ HttpRequest request = HttpRequest.newBuilder(URI.create(uri + "?" + i))
+ .build();
+ requests.put(request, BODIES[i]);
+ }
+
+ // initial connection to seed the cache so next parallel connections reuse it
+ client.sendAsync(HttpRequest.newBuilder(URI.create(uri)).build(), discard(null)).join();
+
+ // will reuse connection cached from the previous request ( when HTTP/2 )
+ CompletableFuture.allOf(requests.keySet().parallelStream()
+ .map(request -> client.sendAsync(request, asString()))
+ .map(cf -> cf.thenCompose(ConcurrentResponses::assert200ResponseCode))
+ .map(cf -> cf.thenCompose(response -> assertbody(response, requests.get(response.request()))))
+ .toArray(CompletableFuture<?>[]::new))
+ .join();
+ }
+
+ // The custom subscriber aggressively attacks any area, between the limit
+ // and the capacity, in the byte buffers it is given, by writing 'X' into it.
+ @Test(dataProvider = "uris")
+ void testWithCustomSubscriber(String uri) throws Exception {
+ HttpClient client = HttpClient.newBuilder().sslContext(sslContext).build();
+
+ Map<HttpRequest, String> requests = new HashMap<>();
+ for (int i=0;i<CONCURRENT_REQUESTS; i++) {
+ HttpRequest request = HttpRequest.newBuilder(URI.create(uri + "?" + i))
+ .build();
+ requests.put(request, BODIES[i]);
+ }
+
+ // initial connection to seed the cache so next parallel connections reuse it
+ client.sendAsync(HttpRequest.newBuilder(URI.create(uri)).build(), discard(null)).join();
+
+ // will reuse connection cached from the previous request ( when HTTP/2 )
+ CompletableFuture.allOf(requests.keySet().parallelStream()
+ .map(request -> client.sendAsync(request, CustomSubscriber.handler))
+ .map(cf -> cf.thenCompose(ConcurrentResponses::assert200ResponseCode))
+ .map(cf -> cf.thenCompose(response -> assertbody(response, requests.get(response.request()))))
+ .toArray(CompletableFuture<?>[]::new))
+ .join();
+ }
+
+ /**
+ * A subscriber that wraps asString, but mucks with any data between limit
+ * and capacity, if the client mistakenly passes it any that is should not.
+ */
+ static class CustomSubscriber implements BodySubscriber<String> {
+ static final BodyHandler<String> handler = (r,h) -> new CustomSubscriber();
+ private final BodySubscriber<String> asString = BodySubscriber.asString(UTF_8);
+
+ @Override
+ public CompletionStage<String> getBody() {
+ return asString.getBody();
+ }
+
+ @Override
+ public void onSubscribe(Flow.Subscription subscription) {
+ asString.onSubscribe(subscription);
+ }
+
+ @Override
+ public void onNext(List<ByteBuffer> buffers) {
+ // Muck any data beyond the give limit, since there shouldn't
+ // be any of interest to the HTTP Client.
+ for (ByteBuffer buffer : buffers) {
+ if (buffer.limit() != buffer.capacity()) {
+ final int limit = buffer.limit();
+ final int position = buffer.position();
+ buffer.position(buffer.limit());
+ buffer.limit(buffer.capacity());
+ while (buffer.hasRemaining())
+ buffer.put((byte)'X');
+ buffer.position(position); // restore original position
+ buffer.limit(limit); // restore original limit
+ }
+ }
+ asString.onNext(buffers);
+ }
+
+ @Override
+ public void onError(Throwable throwable) {
+ asString.onError(throwable);
+ throwable.printStackTrace();
+ fail("UNEXPECTED:" + throwable);
+ }
+
+ @Override
+ public void onComplete() {
+ asString.onComplete();
+ }
+ }
+
+
+ @BeforeTest
+ public void setup() throws Exception {
+ sslContext = new SimpleSSLContext().get();
+ if (sslContext == null)
+ throw new AssertionError("Unexpected null sslContext");
+
+ InetSocketAddress sa = new InetSocketAddress("localhost", 0);
+ httpTestServer = HttpServer.create(sa, 0);
+ httpTestServer.createContext("/http1/fixed", new Http1FixedHandler());
+ httpFixedURI = "http://127.0.0.1:" + httpTestServer.getAddress().getPort() + "/http1/fixed";
+ httpTestServer.createContext("/http1/chunked", new Http1ChunkedHandler());
+ httpChunkedURI = "http://127.0.0.1:" + httpTestServer.getAddress().getPort() + "/http1/chunked";
+
+ httpsTestServer = HttpsServer.create(sa, 0);
+ httpsTestServer.setHttpsConfigurator(new HttpsConfigurator(sslContext));
+ httpsTestServer.createContext("/https1/fixed", new Http1FixedHandler());
+ httpsFixedURI = "https://127.0.0.1:" + httpsTestServer.getAddress().getPort() + "/https1/fixed";
+ httpsTestServer.createContext("/https1/chunked", new Http1ChunkedHandler());
+ httpsChunkedURI = "https://127.0.0.1:" + httpsTestServer.getAddress().getPort() + "/https1/chunked";
+
+ http2TestServer = new Http2TestServer("127.0.0.1", false, 0);
+ http2TestServer.addHandler(new Http2FixedHandler(), "/http2/fixed");
+ http2FixedURI = "http://127.0.0.1:" + http2TestServer.getAddress().getPort() + "/http2/fixed";
+ http2TestServer.addHandler(new Http2VariableHandler(), "/http2/variable");
+ http2VariableURI = "http://127.0.0.1:" + http2TestServer.getAddress().getPort() + "/http2/variable";
+
+ https2TestServer = new Http2TestServer("127.0.0.1", true, 0);
+ https2TestServer.addHandler(new Http2FixedHandler(), "/https2/fixed");
+ https2FixedURI = "https://127.0.0.1:" + https2TestServer.getAddress().getPort() + "/https2/fixed";
+ https2TestServer.addHandler(new Http2VariableHandler(), "/https2/variable");
+ https2VariableURI = "https://127.0.0.1:" + https2TestServer.getAddress().getPort() + "/https2/variable";
+
+ httpTestServer.start();
+ httpsTestServer.start();
+ http2TestServer.start();
+ https2TestServer.start();
+ }
+
+ @AfterTest
+ public void teardown() throws Exception {
+ httpTestServer.stop(0);
+ httpsTestServer.stop(0);
+ http2TestServer.stop();
+ https2TestServer.stop();
+ }
+
+ interface SendResponseHeadersFunction {
+ void apply(int responseCode, long responseLength) throws IOException;
+ }
+
+ // A handler implementation that replies with 200 OK. If the exchange's uri
+ // has a query, then it must be an integer, which is used as an index to
+ // select the particular response body, e.g. /http2/x?5 -> BODIES[5]
+ static void serverHandlerImpl(InputStream inputStream,
+ OutputStream outputStream,
+ URI uri,
+ SendResponseHeadersFunction sendResponseHeadersFunction)
+ throws IOException
+ {
+ try (InputStream is = inputStream;
+ OutputStream os = outputStream) {
+ is.readAllBytes();
+
+ String magicQuery = uri.getQuery();
+ if (magicQuery != null) {
+ int bodyIndex = Integer.valueOf(magicQuery);
+ String body = BODIES[bodyIndex];
+ byte[] bytes = body.getBytes(UTF_8);
+ sendResponseHeadersFunction.apply(200, bytes.length);
+ int offset = 0;
+ // Deliberately attempt to reply with several relatively
+ // small data frames ( each write corresponds to its own
+ // data frame ). Additionally, yield, to encourage other
+ // handlers to execute, therefore increasing the likelihood
+ // of multiple different-stream related frames in the
+ // client's read buffer.
+ while (offset < bytes.length) {
+ int length = Math.min(bytes.length - offset, 64);
+ os.write(bytes, offset, length);
+ os.flush();
+ offset += length;
+ Thread.yield();
+ }
+ } else {
+ sendResponseHeadersFunction.apply(200, 1);
+ os.write('A');
+ }
+ }
+ }
+
+ static class Http1FixedHandler implements HttpHandler {
+ @Override
+ public void handle(HttpExchange t) throws IOException {
+ serverHandlerImpl(t.getRequestBody(),
+ t.getResponseBody(),
+ t.getRequestURI(),
+ (rcode, length) -> t.sendResponseHeaders(rcode, length));
+ }
+ }
+
+ static class Http1ChunkedHandler implements HttpHandler {
+ @Override
+ public void handle(HttpExchange t) throws IOException {
+ serverHandlerImpl(t.getRequestBody(),
+ t.getResponseBody(),
+ t.getRequestURI(),
+ (rcode, ignored) -> t.sendResponseHeaders(rcode, 0 /*chunked*/));
+ }
+ }
+
+ static class Http2FixedHandler implements Http2Handler {
+ @Override
+ public void handle(Http2TestExchange t) throws IOException {
+ serverHandlerImpl(t.getRequestBody(),
+ t.getResponseBody(),
+ t.getRequestURI(),
+ (rcode, length) -> t.sendResponseHeaders(rcode, length));
+ }
+ }
+
+ static class Http2VariableHandler implements Http2Handler {
+ @Override
+ public void handle(Http2TestExchange t) throws IOException {
+ serverHandlerImpl(t.getRequestBody(),
+ t.getResponseBody(),
+ t.getRequestURI(),
+ (rcode, ignored) -> t.sendResponseHeaders(rcode, 0 /* no Content-Length */));
+ }
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/net/httpclient/whitebox/FramesDecoderTestDriver.java Tue Jan 23 13:21:59 2018 +0000
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8195823
+ * @modules jdk.incubator.httpclient/jdk.incubator.http.internal.frame
+ * @run testng/othervm -Djdk.internal.httpclient.debug=true jdk.incubator.httpclient/jdk.incubator.http.internal.frame.FramesDecoderTest
+ */
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/net/httpclient/whitebox/jdk.incubator.httpclient/jdk/incubator/http/internal/frame/FramesDecoderTest.java Tue Jan 23 13:21:59 2018 +0000
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.incubator.http.internal.frame;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
+import org.testng.Assert;
+import org.testng.annotations.Test;
+import static java.lang.System.out;
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.testng.Assert.*;
+
+public class FramesDecoderTest {
+
+ abstract class TestFrameProcessor implements FramesDecoder.FrameProcessor {
+ protected volatile int count;
+ public int numberOfFramesDecoded() { return count; }
+ }
+
+ /**
+ * Verifies that a ByteBuffer containing more that one frame, destined
+ * to be returned to the user's subscriber, i.e. a data frame, does not
+ * inadvertently expose the following frame ( between its limit and
+ * capacity ).
+ */
+ @Test
+ public void decodeDataFrameFollowedByAnother() throws Exception {
+ // input frames for to the decoder
+ List<ByteBuffer> data1 = List.of(ByteBuffer.wrap("XXXX".getBytes(UTF_8)));
+ DataFrame dataFrame1 = new DataFrame(1, 0, data1);
+ List<ByteBuffer> data2 = List.of(ByteBuffer.wrap("YYYY".getBytes(UTF_8)));
+ DataFrame dataFrame2 = new DataFrame(1, 0, data2);
+
+ List<ByteBuffer> buffers = new ArrayList<>();
+ FramesEncoder encoder = new FramesEncoder();
+ buffers.addAll(encoder.encodeFrame(dataFrame1));
+ buffers.addAll(encoder.encodeFrame(dataFrame2));
+
+ ByteBuffer combined = ByteBuffer.allocate(1024);
+ buffers.stream().forEach(combined::put);
+ combined.flip();
+
+ TestFrameProcessor testFrameProcessor = new TestFrameProcessor() {
+ @Override
+ public void processFrame(Http2Frame frame) throws IOException {
+ assertTrue(frame instanceof DataFrame);
+ DataFrame dataFrame = (DataFrame) frame;
+ List<ByteBuffer> list = dataFrame.getData();
+ assertEquals(list.size(), 1);
+ ByteBuffer data = list.get(0);
+ byte[] bytes = new byte[data.remaining()];
+ data.get(bytes);
+ if (count == 0) {
+ assertEquals(new String(bytes, UTF_8), "XXXX");
+ out.println("First data received:" + data);
+ assertEquals(data.position(), data.limit()); // since bytes read
+ assertEquals(data.limit(), data.capacity());
+ } else {
+ assertEquals(new String(bytes, UTF_8), "YYYY");
+ out.println("Second data received:" + data);
+ }
+ count++;
+ }
+ };
+ FramesDecoder decoder = new FramesDecoder(testFrameProcessor);
+
+ out.println("Sending " + combined + " to decoder: ");
+ decoder.decode(combined);
+ Assert.assertEquals(testFrameProcessor.numberOfFramesDecoded(), 2);
+ }
+
+
+ /**
+ * Verifies that a ByteBuffer containing ONLY data one frame, destined
+ * to be returned to the user's subscriber, does not restrict the capacity.
+ * The complete buffer ( all its capacity ), since no longer used by the
+ * HTTP Client, should be returned to the user.
+ */
+ @Test
+ public void decodeDataFrameEnsureNotCapped() throws Exception {
+ // input frames for to the decoder
+ List<ByteBuffer> data1 = List.of(ByteBuffer.wrap("XXXX".getBytes(UTF_8)));
+ DataFrame dataFrame1 = new DataFrame(1, 0, data1);
+
+ List<ByteBuffer> buffers = new ArrayList<>();
+ FramesEncoder encoder = new FramesEncoder();
+ buffers.addAll(encoder.encodeFrame(dataFrame1));
+
+ ByteBuffer combined = ByteBuffer.allocate(1024);
+ buffers.stream().forEach(combined::put);
+ combined.flip();
+
+ TestFrameProcessor testFrameProcessor = new TestFrameProcessor() {
+ @Override
+ public void processFrame(Http2Frame frame) throws IOException {
+ assertTrue(frame instanceof DataFrame);
+ DataFrame dataFrame = (DataFrame) frame;
+ List<ByteBuffer> list = dataFrame.getData();
+ assertEquals(list.size(), 1);
+ ByteBuffer data = list.get(0);
+ byte[] bytes = new byte[data.remaining()];
+ data.get(bytes);
+ assertEquals(new String(bytes, UTF_8), "XXXX");
+ out.println("First data received:" + data);
+ assertEquals(data.position(), data.limit()); // since bytes read
+ //assertNotEquals(data.limit(), data.capacity());
+ assertEquals(data.capacity(), 1024 - 9 /*frame header*/);
+ count++;
+ }
+ };
+ FramesDecoder decoder = new FramesDecoder(testFrameProcessor);
+
+ out.println("Sending " + combined + " to decoder: ");
+ decoder.decode(combined);
+ Assert.assertEquals(testFrameProcessor.numberOfFramesDecoded(), 1);
+ }
+}