/*
* 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
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*/
/*
* @test
* @summary Tests what happens when push promise handlers and their
* response body handlers and subscribers throw unexpected exceptions.
* @library /lib/testlibrary http2/server
* @build jdk.testlibrary.SimpleSSLContext HttpServerAdapters
* ReferenceTracker AbstractThrowingPushPromises
* @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 AbstractThrowingPushPromises
*/
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.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UncheckedIOException;
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.List;
import java.util.Map;
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.atomic.AtomicLong;
import java.util.function.BiPredicate;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static java.lang.System.out;
import static java.lang.System.err;
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 abstract class AbstractThrowingPushPromises 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 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);
}
final ReferenceTracker TRACKER = ReferenceTracker.INSTANCE;
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;
out.printf(now() + "Task %s failed: %s%n", id, t);
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) {
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,
};
}
@DataProvider(name = "sanity")
public Object[][] sanity() {
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;
}
enum Where {
BODY_HANDLER, ON_SUBSCRIBE, ON_NEXT, ON_COMPLETE, ON_ERROR, GET_BODY, BODY_CF,
BEFORE_ACCEPTING, AFTER_ACCEPTING;
public Consumer<Where> select(Consumer<Where> consumer) {
return new Consumer<Where>() {
@Override
public void accept(Where where) {
if (Where.this == where) {
consumer.accept(where);
}
}
};
}
}
private Object[][] variants(List<Thrower> throwers) {
String[] uris = uris();
Object[][] result = new Object[uris.length * 2 * throwers.size()][];
int i = 0;
for (Thrower thrower : throwers) {
for (boolean sameClient : List.of(false, true)) {
for (String uri : uris()) {
result[i++] = new Object[]{uri, sameClient, thrower};
}
}
}
assert i == uris.length * 2 * throwers.size();
return result;
}
@DataProvider(name = "ioVariants")
public Object[][] ioVariants() {
return variants(List.of(
new UncheckedIOExceptionThrower()));
}
@DataProvider(name = "customVariants")
public Object[][] customVariants() {
return variants(List.of(
new UncheckedCustomExceptionThrower()));
}
private HttpClient makeNewClient() {
clientCount.incrementAndGet();
return TRACKER.track(HttpClient.newBuilder()
.proxy(HttpClient.Builder.NO_PROXY)
.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 = "sanity")
protected void testSanityImpl(String uri, boolean sameClient)
throws Exception {
HttpClient client = null;
out.printf("%ntestNoThrows(%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 ThrowingBodyHandler((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")
protected void testThrowingAsStringImpl(String uri,
boolean sameClient,
Thrower thrower)
throws Exception
{
String test = format("testThrowingAsString(%s, %b, %s)",
uri, sameClient, thrower);
testThrowing(test, uri, sameClient, BodyHandlers::ofString,
this::checkAsString, thrower);
}
//@Test(dataProvider = "variants")
protected void testThrowingAsLinesImpl(String uri,
boolean sameClient,
Thrower thrower)
throws Exception
{
String test = format("testThrowingAsLines(%s, %b, %s)",
uri, sameClient, thrower);
testThrowing(test, uri, sameClient, BodyHandlers::ofLines,
this::checkAsLines, thrower);
}
//@Test(dataProvider = "variants")
protected void testThrowingAsInputStreamImpl(String uri,
boolean sameClient,
Thrower thrower)
throws Exception
{
String test = format("testThrowingAsInputStream(%s, %b, %s)",
uri, sameClient, thrower);
testThrowing(test, uri, sameClient, BodyHandlers::ofInputStream,
this::checkAsInputStream, thrower);
}
private <T,U> void testThrowing(String name, String uri, boolean sameClient,
Supplier<BodyHandler<T>> handlers,
Finisher finisher, Thrower thrower)
throws Exception
{
out.printf("%n%s%s%n", now(), name);
try {
testThrowing(uri, sameClient, handlers, finisher, thrower);
} catch (Error | Exception x) {
FAILURES.putIfAbsent(name, x);
throw x;
}
}
private <T,U> void testThrowing(String uri, boolean sameClient,
Supplier<BodyHandler<T>> handlers,
Finisher finisher, Thrower thrower)
throws Exception
{
HttpClient client = null;
for (Where where : Where.values()) {
if (where == Where.ON_ERROR) continue;
if (!sameClient || client == null)
client = newHttpClient(sameClient);
HttpRequest req = HttpRequest.
newBuilder(URI.create(uri))
.build();
ConcurrentMap<HttpRequest, CompletableFuture<HttpResponse<T>>> promiseMap =
new ConcurrentHashMap<>();
Supplier<BodyHandler<T>> throwing = () ->
new ThrowingBodyHandler(where.select(thrower), handlers.get());
PushPromiseHandler<T> pushHandler = new ThrowingPromiseHandler<>(
where.select(thrower),
PushPromiseHandler.of((r) -> throwing.get(), promiseMap));
out.println("try throwing in " + where);
HttpResponse<T> response = null;
try {
response = client.sendAsync(req, handlers.get(), pushHandler).join();
} catch (Error | Exception x) {
throw x;
}
if (response != null) {
finisher.finish(where, req.uri(), response, thrower, promiseMap);
}
}
}
interface Thrower extends Consumer<Where>, Predicate<Throwable> {
}
interface Finisher<T,U> {
U finish(Where w, URI requestURI, HttpResponse<T> resp, Thrower thrower,
Map<HttpRequest, CompletableFuture<HttpResponse<T>>> promises);
}
final <T,U> U shouldHaveThrown(Where w, HttpResponse<T> resp, Thrower thrower) {
String msg = "Expected exception not thrown in " + w
+ "\n\tReceived: " + resp
+ "\n\tWith body: " + resp.body();
System.out.println(msg);
throw new RuntimeException(msg);
}
final List<String> checkAsString(Where w, URI reqURI,
HttpResponse<String> resp,
Thrower thrower,
Map<HttpRequest, CompletableFuture<HttpResponse<String>>> promises) {
Function<HttpResponse<String>, List<String>> extractor =
(r) -> List.of(r.body());
return check(w, reqURI, resp, thrower, promises, extractor);
}
final List<String> checkAsLines(Where w, URI reqURI,
HttpResponse<Stream<String>> resp,
Thrower thrower,
Map<HttpRequest, CompletableFuture<HttpResponse<Stream<String>>>> promises) {
Function<HttpResponse<Stream<String>>, List<String>> extractor =
(r) -> r.body().collect(Collectors.toList());
return check(w, reqURI, resp, thrower, promises, extractor);
}
final List<String> checkAsInputStream(Where w, URI reqURI,
HttpResponse<InputStream> resp,
Thrower thrower,
Map<HttpRequest, CompletableFuture<HttpResponse<InputStream>>> promises)
{
Function<HttpResponse<InputStream>, List<String>> extractor = (r) -> {
List<String> result;
try (InputStream is = r.body()) {
result = new BufferedReader(new InputStreamReader(is))
.lines().collect(Collectors.toList());
} catch (Throwable t) {
throw new CompletionException(t);
}
return result;
};
return check(w, reqURI, resp, thrower, promises, extractor);
}
private final <T> List<String> check(Where w, URI reqURI,
HttpResponse<T> resp,
Thrower thrower,
Map<HttpRequest, CompletableFuture<HttpResponse<T>>> promises,
Function<HttpResponse<T>, List<String>> extractor)
{
List<String> result = extractor.apply(resp);
for (HttpRequest req : promises.keySet()) {
switch (w) {
case BEFORE_ACCEPTING:
throw new RuntimeException("No push promise should have been received" +
" for " + reqURI + " in " + w + ": got " + promises.keySet());
default:
break;
}
HttpResponse<T> presp;
try {
presp = promises.get(req).join();
} catch (Error | Exception x) {
Throwable cause = findCause(x, thrower);
if (cause != null) {
out.println(now() + "Got expected exception in "
+ w + ": " + cause);
continue;
}
throw x;
}
switch (w) {
case BEFORE_ACCEPTING:
case AFTER_ACCEPTING:
case BODY_HANDLER:
case GET_BODY:
case BODY_CF:
return shouldHaveThrown(w, presp, thrower);
default:
break;
}
List<String> presult = null;
try {
presult = extractor.apply(presp);
} catch (Error | Exception x) {
Throwable cause = findCause(x, thrower);
if (cause != null) {
out.println(now() + "Got expected exception for "
+ req + " in " + w + ": " + cause);
continue;
}
throw x;
}
throw new RuntimeException("Expected exception not thrown for "
+ req + " in " + w);
}
final int expectedCount;
switch (w) {
case BEFORE_ACCEPTING:
expectedCount = 0;
break;
default:
expectedCount = 3;
}
assertEquals(promises.size(), expectedCount,
"bad promise count for " + reqURI + " with " + w);
assertEquals(result, List.of(reqURI.toASCIIString()));
return result;
}
private static Throwable findCause(Throwable x,
Predicate<Throwable> filter) {
while (x != null && !filter.test(x)) x = x.getCause();
return x;
}
static final class UncheckedCustomExceptionThrower implements Thrower {
@Override
public void accept(Where where) {
out.println(now() + "Throwing in " + where);
throw new UncheckedCustomException(where.name());
}
@Override
public boolean test(Throwable throwable) {
return UncheckedCustomException.class.isInstance(throwable);
}
@Override
public String toString() {
return "UncheckedCustomExceptionThrower";
}
}
static final class UncheckedIOExceptionThrower implements Thrower {
@Override
public void accept(Where where) {
out.println(now() + "Throwing in " + where);
throw new UncheckedIOException(new CustomIOException(where.name()));
}
@Override
public boolean test(Throwable throwable) {
return UncheckedIOException.class.isInstance(throwable)
&& CustomIOException.class.isInstance(throwable.getCause());
}
@Override
public String toString() {
return "UncheckedIOExceptionThrower";
}
}
static final class UncheckedCustomException extends RuntimeException {
UncheckedCustomException(String message) {
super(message);
}
UncheckedCustomException(String message, Throwable cause) {
super(message, cause);
}
}
static final class CustomIOException extends IOException {
CustomIOException(String message) {
super(message);
}
CustomIOException(String message, Throwable cause) {
super(message, cause);
}
}
static final class ThrowingPromiseHandler<T> implements PushPromiseHandler<T> {
final Consumer<Where> throwing;
final PushPromiseHandler<T> pushHandler;
ThrowingPromiseHandler(Consumer<Where> throwing, PushPromiseHandler<T> pushHandler) {
this.throwing = throwing;
this.pushHandler = pushHandler;
}
@Override
public void applyPushPromise(HttpRequest initiatingRequest,
HttpRequest pushPromiseRequest,
Function<BodyHandler<T>,
CompletableFuture<HttpResponse<T>>> acceptor) {
throwing.accept(Where.BEFORE_ACCEPTING);
pushHandler.applyPushPromise(initiatingRequest, pushPromiseRequest, acceptor);
throwing.accept(Where.AFTER_ACCEPTING);
}
}
static final class ThrowingBodyHandler<T> implements BodyHandler<T> {
final Consumer<Where> throwing;
final BodyHandler<T> bodyHandler;
ThrowingBodyHandler(Consumer<Where> throwing, BodyHandler<T> bodyHandler) {
this.throwing = throwing;
this.bodyHandler = bodyHandler;
}
@Override
public BodySubscriber<T> apply(HttpResponse.ResponseInfo rinfo) {
throwing.accept(Where.BODY_HANDLER);
BodySubscriber<T> subscriber = bodyHandler.apply(rinfo);
return new ThrowingBodySubscriber(throwing, subscriber);
}
}
static final class ThrowingBodySubscriber<T> implements BodySubscriber<T> {
private final BodySubscriber<T> subscriber;
volatile boolean onSubscribeCalled;
final Consumer<Where> throwing;
ThrowingBodySubscriber(Consumer<Where> throwing, BodySubscriber<T> subscriber) {
this.throwing = throwing;
this.subscriber = subscriber;
}
@Override
public void onSubscribe(Flow.Subscription subscription) {
//out.println("onSubscribe ");
onSubscribeCalled = true;
throwing.accept(Where.ON_SUBSCRIBE);
subscriber.onSubscribe(subscription);
}
@Override
public void onNext(List<ByteBuffer> item) {
// out.println("onNext " + item);
assertTrue(onSubscribeCalled);
throwing.accept(Where.ON_NEXT);
subscriber.onNext(item);
}
@Override
public void onError(Throwable throwable) {
//out.println("onError");
assertTrue(onSubscribeCalled);
throwing.accept(Where.ON_ERROR);
subscriber.onError(throwable);
}
@Override
public void onComplete() {
//out.println("onComplete");
assertTrue(onSubscribeCalled, "onComplete called before onSubscribe");
throwing.accept(Where.ON_COMPLETE);
subscriber.onComplete();
}
@Override
public CompletionStage<T> getBody() {
throwing.accept(Where.GET_BODY);
try {
throwing.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/x";
http2URI_chunk = "http://" + http2TestServer.serverAuthority() + "/http2/chunk/x";
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/x";
https2URI_chunk = "https://" + https2TestServer.serverAuthority() + "/https2/chunk/x";
serverCount.addAndGet(2);
http2TestServer.start();
https2TestServer.start();
}
@AfterTest
public void teardown() throws Exception {
String sharedClientName =
sharedClient == null ? null : sharedClient.toString();
sharedClient = null;
Thread.sleep(100);
AssertionError fail = TRACKER.check(500);
try {
http2TestServer.stop();
https2TestServer.stop();
} finally {
if (fail != null) {
if (sharedClientName != null) {
System.err.println("Shared client name is: " + sharedClientName);
}
throw fail;
}
}
}
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);
}
}
}
}