/*
* 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
* @summary Verify that dependent synchronous actions added before the promise CF
* completes are executed either asynchronously in an executor when the
* CF later completes, or in the user thread that joins.
* @library /lib/testlibrary http2/server
* @build jdk.testlibrary.SimpleSSLContext HttpServerAdapters DependentPromiseActionsTest
* @modules java.base/sun.net.www.http
* java.net.http/jdk.internal.net.http.common
* java.net.http/jdk.internal.net.http.frame
* java.net.http/jdk.internal.net.http.hpack
* @run testng/othervm -Djdk.internal.httpclient.debug=true DependentPromiseActionsTest
* @run testng/othervm/java.security.policy=dependent.policy
* -Djdk.internal.httpclient.debug=true DependentPromiseActionsTest
*/
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.StackWalker.StackFrame;
import jdk.testlibrary.SimpleSSLContext;
import org.testng.annotations.AfterTest;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import javax.net.ssl.SSLContext;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.http.HttpClient;
import java.net.http.HttpHeaders;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpResponse.BodyHandler;
import java.net.http.HttpResponse.BodyHandlers;
import java.net.http.HttpResponse.BodySubscriber;
import java.net.http.HttpResponse.PushPromiseHandler;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.util.EnumSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.Flow;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.BiPredicate;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static java.lang.System.err;
import static java.lang.System.out;
import static java.lang.String.format;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
public class DependentPromiseActionsTest implements HttpServerAdapters {
SSLContext sslContext;
HttpTestServer http2TestServer; // HTTP/2 ( h2c )
HttpTestServer https2TestServer; // HTTP/2 ( h2 )
String http2URI_fixed;
String http2URI_chunk;
String https2URI_fixed;
String https2URI_chunk;
static final StackWalker WALKER =
StackWalker.getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE);
static final int ITERATION_COUNT = 1;
// a shared executor helps reduce the amount of threads created by the test
static final Executor executor = new TestExecutor(Executors.newCachedThreadPool());
static final ConcurrentMap<String, Throwable> FAILURES = new ConcurrentHashMap<>();
static volatile boolean tasksFailed;
static final AtomicLong serverCount = new AtomicLong();
static final AtomicLong clientCount = new AtomicLong();
static final long start = System.nanoTime();
public static String now() {
long now = System.nanoTime() - start;
long secs = now / 1000_000_000;
long mill = (now % 1000_000_000) / 1000_000;
long nan = now % 1000_000;
return String.format("[%d s, %d ms, %d ns] ", secs, mill, nan);
}
private volatile HttpClient sharedClient;
static class TestExecutor implements Executor {
final AtomicLong tasks = new AtomicLong();
Executor executor;
TestExecutor(Executor executor) {
this.executor = executor;
}
@Override
public void execute(Runnable command) {
long id = tasks.incrementAndGet();
executor.execute(() -> {
try {
command.run();
} catch (Throwable t) {
tasksFailed = true;
System.out.printf(now() + "Task %s failed: %s%n", id, t);
System.err.printf(now() + "Task %s failed: %s%n", id, t);
FAILURES.putIfAbsent("Task " + id, t);
throw t;
}
});
}
}
@AfterClass
static final void printFailedTests() {
out.println("\n=========================");
try {
out.printf("%n%sCreated %d servers and %d clients%n",
now(), serverCount.get(), clientCount.get());
if (FAILURES.isEmpty()) return;
out.println("Failed tests: ");
FAILURES.entrySet().forEach((e) -> {
out.printf("\t%s: %s%n", e.getKey(), e.getValue());
e.getValue().printStackTrace(out);
e.getValue().printStackTrace();
});
if (tasksFailed) {
System.out.println("WARNING: Some tasks failed");
}
} finally {
out.println("\n=========================\n");
}
}
private String[] uris() {
return new String[] {
http2URI_fixed,
http2URI_chunk,
https2URI_fixed,
https2URI_chunk,
};
}
enum SubscriberType {EAGER, LAZZY}
static final class SemaphoreStallerSupplier
implements Supplier<SemaphoreStaller> {
@Override
public SemaphoreStaller get() {
return new SemaphoreStaller();
}
@Override
public String toString() {
return "SemaphoreStaller";
}
}
@DataProvider(name = "noStalls")
public Object[][] noThrows() {
String[] uris = uris();
Object[][] result = new Object[uris.length * 2][];
int i = 0;
for (boolean sameClient : List.of(false, true)) {
for (String uri: uris()) {
result[i++] = new Object[] {uri, sameClient};
}
}
assert i == uris.length * 2;
return result;
}
@DataProvider(name = "variants")
public Object[][] variants() {
String[] uris = uris();
Object[][] result = new Object[uris.length * 2][];
int i = 0;
Supplier<? extends Staller> s = new SemaphoreStallerSupplier();
for (Supplier<? extends Staller> staller : List.of(s)) {
for (boolean sameClient : List.of(false, true)) {
for (String uri : uris()) {
result[i++] = new Object[]{uri, sameClient, staller};
}
}
}
assert i == uris.length * 2;
return result;
}
private HttpClient makeNewClient() {
clientCount.incrementAndGet();
return HttpClient.newBuilder()
.executor(executor)
.sslContext(sslContext)
.build();
}
HttpClient newHttpClient(boolean share) {
if (!share) return makeNewClient();
HttpClient shared = sharedClient;
if (shared != null) return shared;
synchronized (this) {
shared = sharedClient;
if (shared == null) {
shared = sharedClient = makeNewClient();
}
return shared;
}
}
@Test(dataProvider = "noStalls")
public void testNoStalls(String uri, boolean sameClient)
throws Exception {
HttpClient client = null;
out.printf("%ntestNoStalls(%s, %b)%n", uri, sameClient);
for (int i=0; i< ITERATION_COUNT; i++) {
if (!sameClient || client == null)
client = newHttpClient(sameClient);
HttpRequest req = HttpRequest.newBuilder(URI.create(uri))
.build();
BodyHandler<Stream<String>> handler =
new StallingBodyHandler((w) -> {},
BodyHandlers.ofLines());
Map<HttpRequest, CompletableFuture<HttpResponse<Stream<String>>>> pushPromises =
new ConcurrentHashMap<>();
PushPromiseHandler<Stream<String>> pushHandler = new PushPromiseHandler<>() {
@Override
public void applyPushPromise(HttpRequest initiatingRequest,
HttpRequest pushPromiseRequest,
Function<BodyHandler<Stream<String>>,
CompletableFuture<HttpResponse<Stream<String>>>>
acceptor) {
pushPromises.putIfAbsent(pushPromiseRequest, acceptor.apply(handler));
}
};
HttpResponse<Stream<String>> response =
client.sendAsync(req, BodyHandlers.ofLines(), pushHandler).get();
String body = response.body().collect(Collectors.joining("|"));
assertEquals(URI.create(body).getPath(), URI.create(uri).getPath());
for (HttpRequest promised : pushPromises.keySet()) {
out.printf("%s Received promise: %s%n\tresponse: %s%n",
now(), promised, pushPromises.get(promised).get());
String promisedBody = pushPromises.get(promised).get().body()
.collect(Collectors.joining("|"));
assertEquals(promisedBody, promised.uri().toASCIIString());
}
assertEquals(3, pushPromises.size());
}
}
@Test(dataProvider = "variants")
public void testAsStringAsync(String uri,
boolean sameClient,
Supplier<Staller> stallers)
throws Exception
{
String test = format("testAsStringAsync(%s, %b, %s)",
uri, sameClient, stallers);
testDependent(test, uri, sameClient, BodyHandlers::ofString,
this::finish, this::extractString, stallers,
SubscriberType.EAGER);
}
@Test(dataProvider = "variants")
public void testAsLinesAsync(String uri,
boolean sameClient,
Supplier<Staller> stallers)
throws Exception
{
String test = format("testAsLinesAsync(%s, %b, %s)",
uri, sameClient, stallers);
testDependent(test, uri, sameClient, BodyHandlers::ofLines,
this::finish, this::extractStream, stallers,
SubscriberType.LAZZY);
}
@Test(dataProvider = "variants")
public void testAsInputStreamAsync(String uri,
boolean sameClient,
Supplier<Staller> stallers)
throws Exception
{
String test = format("testAsInputStreamAsync(%s, %b, %s)",
uri, sameClient, stallers);
testDependent(test, uri, sameClient, BodyHandlers::ofInputStream,
this::finish, this::extractInputStream, stallers,
SubscriberType.LAZZY);
}
private <T,U> void testDependent(String name, String uri, boolean sameClient,
Supplier<BodyHandler<T>> handlers,
Finisher finisher,
Extractor<T> extractor,
Supplier<Staller> stallers,
SubscriberType subscriberType)
throws Exception
{
out.printf("%n%s%s%n", now(), name);
try {
testDependent(uri, sameClient, handlers, finisher,
extractor, stallers, subscriberType);
} catch (Error | Exception x) {
FAILURES.putIfAbsent(name, x);
throw x;
}
}
private <T,U> void testDependent(String uri, boolean sameClient,
Supplier<BodyHandler<T>> handlers,
Finisher finisher,
Extractor<T> extractor,
Supplier<Staller> stallers,
SubscriberType subscriberType)
throws Exception
{
HttpClient client = null;
for (Where where : EnumSet.of(Where.BODY_HANDLER)) {
if (!sameClient || client == null)
client = newHttpClient(sameClient);
HttpRequest req = HttpRequest.
newBuilder(URI.create(uri))
.build();
StallingPushPromiseHandler<T> promiseHandler =
new StallingPushPromiseHandler<>(where, handlers, stallers);
BodyHandler<T> handler = handlers.get();
System.out.println("try stalling in " + where);
CompletableFuture<HttpResponse<T>> responseCF =
client.sendAsync(req, handler, promiseHandler);
assert subscriberType == SubscriberType.LAZZY || !responseCF.isDone();
finisher.finish(where, responseCF, promiseHandler, extractor);
}
}
enum Where {
ON_PUSH_PROMISE, BODY_HANDLER, ON_SUBSCRIBE, ON_NEXT, ON_COMPLETE, ON_ERROR, GET_BODY, BODY_CF;
public Consumer<Where> select(Consumer<Where> consumer) {
return new Consumer<Where>() {
@Override
public void accept(Where where) {
if (Where.this == where) {
consumer.accept(where);
}
}
};
}
}
static final class StallingPushPromiseHandler<T> implements PushPromiseHandler<T> {
static final class Tuple<U> {
public final CompletableFuture<HttpResponse<U>> response;
public final Staller staller;
public final AtomicReference<RuntimeException> failed;
Tuple(AtomicReference<RuntimeException> failed,
CompletableFuture<HttpResponse<U>> response,
Staller staller) {
this.response = response;
this.staller = staller;
this.failed = failed;
}
}
public final ConcurrentMap<HttpRequest, Tuple<T>> promiseMap =
new ConcurrentHashMap<>();
private final Supplier<Staller> stallers;
private final Supplier<BodyHandler<T>> handlers;
private final Where where;
private final Thread thread = Thread.currentThread(); // main thread
StallingPushPromiseHandler(Where where,
Supplier<BodyHandler<T>> handlers,
Supplier<Staller> stallers) {
this.where = where;
this.handlers = handlers;
this.stallers = stallers;
}
@Override
public void applyPushPromise(HttpRequest initiatingRequest,
HttpRequest pushPromiseRequest,
Function<BodyHandler<T>,
CompletableFuture<HttpResponse<T>>> acceptor) {
AtomicReference<RuntimeException> failed = new AtomicReference<>();
Staller staller = stallers.get();
staller.acquire();
assert staller.willStall();
try {
BodyHandler handler = new StallingBodyHandler<>(
where.select(staller), handlers.get());
CompletableFuture<HttpResponse<T>> cf = acceptor.apply(handler);
Tuple<T> tuple = new Tuple(failed, cf, staller);
promiseMap.putIfAbsent(pushPromiseRequest, tuple);
CompletableFuture<?> done = cf.whenComplete(
(r, t) -> checkThreadAndStack(thread, failed, r, t));
assert !cf.isDone();
} finally {
staller.release();
}
}
}
interface Extractor<T> {
public List<String> extract(HttpResponse<T> resp);
}
final List<String> extractString(HttpResponse<String> resp) {
return List.of(resp.body());
}
final List<String> extractStream(HttpResponse<Stream<String>> resp) {
return resp.body().collect(Collectors.toList());
}
final List<String> extractInputStream(HttpResponse<InputStream> resp) {
try (InputStream is = resp.body()) {
return new BufferedReader(new InputStreamReader(is))
.lines().collect(Collectors.toList());
} catch (IOException x) {
throw new CompletionException(x);
}
}
interface Finisher<T> {
public void finish(Where w,
CompletableFuture<HttpResponse<T>> cf,
StallingPushPromiseHandler<T> ph,
Extractor<T> extractor);
}
static Optional<StackFrame> findFrame(Stream<StackFrame> s, String name) {
return s.filter((f) -> f.getClassName().contains(name))
.filter((f) -> f.getDeclaringClass().getModule().equals(HttpClient.class.getModule()))
.findFirst();
}
static <T> void checkThreadAndStack(Thread thread,
AtomicReference<RuntimeException> failed,
T result,
Throwable error) {
if (Thread.currentThread() == thread) {
//failed.set(new RuntimeException("Dependant action was executed in " + thread));
List<StackFrame> httpStack = WALKER.walk(s -> s.filter(f -> f.getDeclaringClass()
.getModule().equals(HttpClient.class.getModule()))
.collect(Collectors.toList()));
if (!httpStack.isEmpty()) {
System.out.println("Found unexpected trace: ");
httpStack.forEach(f -> System.out.printf("\t%s%n", f));
failed.set(new RuntimeException("Dependant action has unexpected frame in " +
Thread.currentThread() + ": " + httpStack.get(0)));
} return;
} else if (System.getSecurityManager() != null) {
Optional<StackFrame> sf = WALKER.walk(s -> findFrame(s, "PrivilegedRunnable"));
if (!sf.isPresent()) {
failed.set(new RuntimeException("Dependant action does not have expected frame in "
+ Thread.currentThread()));
return;
} else {
System.out.println("Found expected frame: " + sf.get());
}
} else {
List<StackFrame> httpStack = WALKER.walk(s -> s.filter(f -> f.getDeclaringClass()
.getModule().equals(HttpClient.class.getModule()))
.collect(Collectors.toList()));
if (!httpStack.isEmpty()) {
System.out.println("Found unexpected trace: ");
httpStack.forEach(f -> System.out.printf("\t%s%n", f));
failed.set(new RuntimeException("Dependant action has unexpected frame in " +
Thread.currentThread() + ": " + httpStack.get(0)));
}
}
}
<T> void finish(Where w,
StallingPushPromiseHandler.Tuple<T> tuple,
Extractor<T> extractor) {
AtomicReference<RuntimeException> failed = tuple.failed;
CompletableFuture<HttpResponse<T>> done = tuple.response;
Staller staller = tuple.staller;
try {
HttpResponse<T> response = done.join();
List<String> result = extractor.extract(response);
URI uri = response.uri();
RuntimeException error = failed.get();
if (error != null) {
throw new RuntimeException("Test failed in "
+ w + ": " + uri, error);
}
assertEquals(result, List.of(response.request().uri().toASCIIString()));
} finally {
staller.reset();
}
}
<T> void finish(Where w,
CompletableFuture<HttpResponse<T>> cf,
StallingPushPromiseHandler<T> ph,
Extractor<T> extractor) {
HttpResponse<T> response = cf.join();
List<String> result = extractor.extract(response);
for (HttpRequest req : ph.promiseMap.keySet()) {
finish(w, ph.promiseMap.get(req), extractor);
}
assertEquals(ph.promiseMap.size(), 3,
"Expected 3 push promises for " + w + " in "
+ response.request().uri());
assertEquals(result, List.of(response.request().uri().toASCIIString()));
}
interface Staller extends Consumer<Where> {
void release();
void acquire();
void reset();
boolean willStall();
}
static final class SemaphoreStaller implements Staller {
final Semaphore sem = new Semaphore(1);
@Override
public void accept(Where where) {
sem.acquireUninterruptibly();
}
@Override
public void release() {
sem.release();
}
@Override
public void acquire() {
sem.acquireUninterruptibly();
}
@Override
public void reset() {
sem.drainPermits();
sem.release();
}
@Override
public boolean willStall() {
return sem.availablePermits() <= 0;
}
@Override
public String toString() {
return "SemaphoreStaller";
}
}
static final class StallingBodyHandler<T> implements BodyHandler<T> {
final Consumer<Where> stalling;
final BodyHandler<T> bodyHandler;
StallingBodyHandler(Consumer<Where> stalling, BodyHandler<T> bodyHandler) {
this.stalling = stalling;
this.bodyHandler = bodyHandler;
}
@Override
public BodySubscriber<T> apply(HttpResponse.ResponseInfo rinfo) {
stalling.accept(Where.BODY_HANDLER);
BodySubscriber<T> subscriber = bodyHandler.apply(rinfo);
return new StallingBodySubscriber(stalling, subscriber);
}
}
static final class StallingBodySubscriber<T> implements BodySubscriber<T> {
private final BodySubscriber<T> subscriber;
volatile boolean onSubscribeCalled;
final Consumer<Where> stalling;
StallingBodySubscriber(Consumer<Where> stalling, BodySubscriber<T> subscriber) {
this.stalling = stalling;
this.subscriber = subscriber;
}
@Override
public void onSubscribe(Flow.Subscription subscription) {
//out.println("onSubscribe ");
onSubscribeCalled = true;
stalling.accept(Where.ON_SUBSCRIBE);
subscriber.onSubscribe(subscription);
}
@Override
public void onNext(List<ByteBuffer> item) {
// out.println("onNext " + item);
assertTrue(onSubscribeCalled);
stalling.accept(Where.ON_NEXT);
subscriber.onNext(item);
}
@Override
public void onError(Throwable throwable) {
//out.println("onError");
assertTrue(onSubscribeCalled);
stalling.accept(Where.ON_ERROR);
subscriber.onError(throwable);
}
@Override
public void onComplete() {
//out.println("onComplete");
assertTrue(onSubscribeCalled, "onComplete called before onSubscribe");
stalling.accept(Where.ON_COMPLETE);
subscriber.onComplete();
}
@Override
public CompletionStage<T> getBody() {
stalling.accept(Where.GET_BODY);
try {
stalling.accept(Where.BODY_CF);
} catch (Throwable t) {
return CompletableFuture.failedFuture(t);
}
return subscriber.getBody();
}
}
@BeforeTest
public void setup() throws Exception {
sslContext = new SimpleSSLContext().get();
if (sslContext == null)
throw new AssertionError("Unexpected null sslContext");
// HTTP/2
HttpTestHandler h2_fixedLengthHandler = new HTTP_FixedLengthHandler();
HttpTestHandler h2_chunkedHandler = new HTTP_ChunkedHandler();
http2TestServer = HttpTestServer.of(new Http2TestServer("localhost", false, 0));
http2TestServer.addHandler(h2_fixedLengthHandler, "/http2/fixed");
http2TestServer.addHandler(h2_chunkedHandler, "/http2/chunk");
http2URI_fixed = "http://" + http2TestServer.serverAuthority() + "/http2/fixed/y";
http2URI_chunk = "http://" + http2TestServer.serverAuthority() + "/http2/chunk/y";
https2TestServer = HttpTestServer.of(new Http2TestServer("localhost", true, sslContext));
https2TestServer.addHandler(h2_fixedLengthHandler, "/https2/fixed");
https2TestServer.addHandler(h2_chunkedHandler, "/https2/chunk");
https2URI_fixed = "https://" + https2TestServer.serverAuthority() + "/https2/fixed/y";
https2URI_chunk = "https://" + https2TestServer.serverAuthority() + "/https2/chunk/y";
serverCount.addAndGet(4);
http2TestServer.start();
https2TestServer.start();
}
@AfterTest
public void teardown() throws Exception {
sharedClient = null;
http2TestServer.stop();
https2TestServer.stop();
}
static final BiPredicate<String,String> ACCEPT_ALL = (x, y) -> true;
private static void pushPromiseFor(HttpTestExchange t,
URI requestURI,
String pushPath,
boolean fixed)
throws IOException
{
try {
URI promise = new URI(requestURI.getScheme(),
requestURI.getAuthority(),
pushPath, null, null);
byte[] promiseBytes = promise.toASCIIString().getBytes(UTF_8);
out.printf("TestServer: %s Pushing promise: %s%n", now(), promise);
err.printf("TestServer: %s Pushing promise: %s%n", now(), promise);
HttpHeaders headers;
if (fixed) {
String length = String.valueOf(promiseBytes.length);
headers = HttpHeaders.of(Map.of("Content-Length", List.of(length)),
ACCEPT_ALL);
} else {
headers = HttpHeaders.of(Map.of(), ACCEPT_ALL); // empty
}
t.serverPush(promise, headers, promiseBytes);
} catch (URISyntaxException x) {
throw new IOException(x.getMessage(), x);
}
}
static class HTTP_FixedLengthHandler implements HttpTestHandler {
@Override
public void handle(HttpTestExchange t) throws IOException {
out.println("HTTP_FixedLengthHandler received request to " + t.getRequestURI());
try (InputStream is = t.getRequestBody()) {
is.readAllBytes();
}
URI requestURI = t.getRequestURI();
for (int i = 1; i<2; i++) {
String path = requestURI.getPath() + "/before/promise-" + i;
pushPromiseFor(t, requestURI, path, true);
}
byte[] resp = t.getRequestURI().toString().getBytes(StandardCharsets.UTF_8);
t.sendResponseHeaders(200, resp.length); //fixed content length
try (OutputStream os = t.getResponseBody()) {
int bytes = resp.length/3;
for (int i = 0; i<2; i++) {
String path = requestURI.getPath() + "/after/promise-" + (i + 2);
os.write(resp, i * bytes, bytes);
os.flush();
pushPromiseFor(t, requestURI, path, true);
}
os.write(resp, 2*bytes, resp.length - 2*bytes);
}
}
}
static class HTTP_ChunkedHandler implements HttpTestHandler {
@Override
public void handle(HttpTestExchange t) throws IOException {
out.println("HTTP_ChunkedHandler received request to " + t.getRequestURI());
byte[] resp = t.getRequestURI().toString().getBytes(StandardCharsets.UTF_8);
try (InputStream is = t.getRequestBody()) {
is.readAllBytes();
}
URI requestURI = t.getRequestURI();
for (int i = 1; i<2; i++) {
String path = requestURI.getPath() + "/before/promise-" + i;
pushPromiseFor(t, requestURI, path, false);
}
t.sendResponseHeaders(200, -1); // chunked/variable
try (OutputStream os = t.getResponseBody()) {
int bytes = resp.length/3;
for (int i = 0; i<2; i++) {
String path = requestURI.getPath() + "/after/promise-" + (i + 2);
os.write(resp, i * bytes, bytes);
os.flush();
pushPromiseFor(t, requestURI, path, false);
}
os.write(resp, 2*bytes, resp.length - 2*bytes);
}
}
}
}