| /* |
| * 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. |
| */ |
| |
| import java.io.IOException; |
| import java.io.UncheckedIOException; |
| import java.nio.ByteBuffer; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.Flow; |
| import java.util.concurrent.SubmissionPublisher; |
| 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.BodySubscriber; |
| import java.net.http.HttpResponse.PushPromiseHandler; |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| import static java.nio.ByteBuffer.wrap; |
| |
| /** |
| * An HttpClient that returns a given fixed response. |
| * Suitable for testing where network connections are to be avoided. |
| */ |
| public class FixedResponseHttpClient extends DelegatingHttpClient { |
| private final ByteBuffer responseBodyBytes; |
| private final int responseStatusCode; |
| private final HttpHeaders responseHeaders; |
| private final HttpClient.Version responseVersion; |
| private final HttpResponse.ResponseInfo responseInfo; |
| |
| private FixedResponseHttpClient(HttpClient.Builder builder, |
| int responseStatusCode, |
| HttpHeaders responseHeaders, |
| ByteBuffer responseBodyBytes) { |
| super(builder.build()); |
| this.responseStatusCode = responseStatusCode; |
| this.responseHeaders = responseHeaders; |
| this.responseBodyBytes = responseBodyBytes; |
| this.responseVersion = HttpClient.Version.HTTP_1_1; // should be added to constructor |
| this.responseInfo = new FixedResponseInfo(); |
| } |
| |
| /** |
| * Creates a new HttpClient that returns a fixed response, |
| * constructed from the given values, for every request sent. |
| */ |
| public static HttpClient createClientFrom(HttpClient.Builder builder, |
| int responseStatusCode, |
| HttpHeaders responseHeaders, |
| String responseBody) { |
| return new FixedResponseHttpClient(builder, |
| responseStatusCode, |
| responseHeaders, |
| wrap(responseBody.getBytes(UTF_8))); |
| } |
| |
| /** |
| * Creates a new HttpClient that returns a fixed response, |
| * constructed from the given values, for every request sent. |
| */ |
| public static HttpClient createClientFrom(HttpClient.Builder builder, |
| int responseStatusCode, |
| HttpHeaders responseHeaders, |
| Path path) { |
| try { |
| return new FixedResponseHttpClient(builder, |
| responseStatusCode, |
| responseHeaders, |
| wrap(Files.readAllBytes(path))); |
| } catch (IOException ioe) { |
| throw new UncheckedIOException(ioe); |
| } |
| } |
| |
| /** |
| * Creates a new HttpClient that returns a fixed response, |
| * constructed from the given values, for every request sent. |
| */ |
| public static HttpClient createClientFrom(HttpClient.Builder builder, |
| int responseStatusCode, |
| HttpHeaders responseHeaders, |
| byte[] responseBody) { |
| return new FixedResponseHttpClient(builder, |
| responseStatusCode, |
| responseHeaders, |
| wrap(responseBody)); |
| } |
| |
| private static final ByteBuffer ECHO_SENTINAL = ByteBuffer.wrap(new byte[] {}); |
| |
| /** |
| * Creates a new HttpClient that returns a fixed response, |
| * constructed from the given values, for every request sent. |
| */ |
| public static HttpClient createEchoClient(HttpClient.Builder builder, |
| int responseStatusCode, |
| HttpHeaders responseHeaders) { |
| return new FixedResponseHttpClient(builder, |
| responseStatusCode, |
| responseHeaders, |
| ECHO_SENTINAL); |
| } |
| |
| @Override |
| public <T> CompletableFuture<HttpResponse<T>> |
| sendAsync(HttpRequest request, BodyHandler<T> responseBodyHandler) { |
| return sendAsync(request, responseBodyHandler, null); |
| } |
| |
| @Override |
| public <T> HttpResponse<T> send(HttpRequest request, |
| BodyHandler<T> responseBodyHandler) |
| throws IOException, InterruptedException { |
| return sendAsync(request, responseBodyHandler).join(); // unwrap exceptions if needed |
| } |
| |
| class FixedResponseInfo implements HttpResponse.ResponseInfo { |
| private final int statusCode; |
| private final HttpHeaders headers; |
| private final HttpClient.Version version; |
| |
| FixedResponseInfo() { |
| this.statusCode = responseStatusCode; |
| this.headers = responseHeaders; |
| this.version = HttpClient.Version.HTTP_1_1; |
| } |
| |
| /** |
| * Provides the response status code |
| * @return the response status code |
| */ |
| public int statusCode() { |
| return statusCode; |
| } |
| |
| /** |
| * Provides the response headers |
| * @return the response headers |
| */ |
| public HttpHeaders headers() { |
| return headers; |
| } |
| |
| /** |
| * provides the response protocol version |
| * @return the response protocol version |
| */ |
| public HttpClient.Version version() { |
| return version; |
| } |
| } |
| |
| @Override |
| public <T> CompletableFuture<HttpResponse<T>> |
| sendAsync(HttpRequest request, |
| BodyHandler<T> responseBodyHandler, |
| PushPromiseHandler<T> pushPromiseHandler) { |
| List<ByteBuffer> responseBody = List.of(responseBodyBytes.duplicate()); |
| |
| // Push promises can be mocked too, if needed |
| |
| Optional<HttpRequest.BodyPublisher> obp = request.bodyPublisher(); |
| if (obp.isPresent()) { |
| ConsumingSubscriber subscriber = new ConsumingSubscriber(); |
| obp.get().subscribe(subscriber); |
| if (responseBodyBytes == ECHO_SENTINAL) { |
| responseBody = subscriber.buffers; |
| } |
| } |
| |
| BodySubscriber<T> bodySubscriber = |
| responseBodyHandler.apply(responseInfo); |
| SubmissionPublisher<List<ByteBuffer>> publisher = new SubmissionPublisher<>(); |
| publisher.subscribe(bodySubscriber); |
| publisher.submit(responseBody); |
| publisher.close(); |
| |
| CompletableFuture<HttpResponse<T>> cf = new CompletableFuture<>(); |
| bodySubscriber.getBody().whenComplete((body, throwable) -> { |
| if (body != null) |
| cf.complete(new FixedHttpResponse<>( |
| responseStatusCode, |
| request, |
| responseHeaders, |
| body, |
| null, |
| request.uri(), |
| request.version().orElse(Version.HTTP_2))); |
| else |
| cf.completeExceptionally(throwable); |
| } |
| ); |
| |
| return cf; |
| } |
| |
| /** |
| * A Subscriber that demands and consumes all the Publishers data, |
| * after which makes it directly available. |
| */ |
| private static class ConsumingSubscriber implements Flow.Subscriber<ByteBuffer> { |
| final List<ByteBuffer> buffers = Collections.synchronizedList(new ArrayList<>()); |
| |
| @Override |
| public void onSubscribe(Flow.Subscription subscription) { |
| subscription.request(Long.MAX_VALUE); |
| } |
| |
| @Override public void onNext(ByteBuffer item) { |
| buffers.add(item.duplicate()); |
| } |
| |
| @Override public void onError(Throwable throwable) { assert false : "Unexpected"; } |
| |
| @Override public void onComplete() { /* do nothing */ } |
| } |
| } |