/
JettyHttpClient.java
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/
JettyHttpClient.java
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/**
* Copyright (C) 2015 Red Hat, Inc.
*
* 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 io.fabric8.kubernetes.client.jetty;
import io.fabric8.kubernetes.client.KubernetesClientException;
import io.fabric8.kubernetes.client.http.HttpRequest;
import io.fabric8.kubernetes.client.http.HttpResponse;
import io.fabric8.kubernetes.client.http.Interceptor;
import io.fabric8.kubernetes.client.http.StandardHttpRequest;
import io.fabric8.kubernetes.client.http.WebSocket;
import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.client.api.Request;
import org.eclipse.jetty.client.api.Response;
import org.eclipse.jetty.client.api.Result;
import org.eclipse.jetty.client.util.BufferingResponseListener;
import org.eclipse.jetty.client.util.InputStreamRequestContent;
import org.eclipse.jetty.client.util.StringRequestContent;
import org.eclipse.jetty.websocket.client.WebSocketClient;
import java.nio.ByteBuffer;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;
import static io.fabric8.kubernetes.client.http.StandardMediaTypes.APPLICATION_OCTET_STREAM;
import static io.fabric8.kubernetes.client.http.StandardMediaTypes.TEXT_PLAIN;
import static org.eclipse.jetty.util.BufferUtil.toArray;
public class JettyHttpClient implements io.fabric8.kubernetes.client.http.HttpClient {
private final HttpClient jetty;
private final WebSocketClient jettyWs;
private final Collection<Interceptor> interceptors;
private final JettyHttpClientBuilder builder;
private final JettyHttpClientFactory factory;
public JettyHttpClient(JettyHttpClientBuilder builder, HttpClient httpClient, WebSocketClient webSocketClient,
Collection<Interceptor> interceptors, JettyHttpClientFactory jettyHttpClientFactory) {
this.builder = builder;
this.jetty = httpClient;
this.jettyWs = webSocketClient;
this.interceptors = interceptors;
this.factory = jettyHttpClientFactory;
}
@Override
public void close() {
try {
jetty.stop();
jettyWs.stop();
} catch (Exception e) {
throw KubernetesClientException.launderThrowable(e);
}
}
@Override
public DerivedClientBuilder newBuilder() {
return builder.copy();
}
@Override
public <T> CompletableFuture<HttpResponse<T>> sendAsync(HttpRequest originalRequest, Class<T> type) {
final var supportedResponse = JettyHttpResponse.SupportedResponse.from(type);
final var request = toStandardHttpRequest(originalRequest);
final CompletableFuture<HttpResponse<T>> future = new CompletableFuture<>();
newRequest(request).send(new BufferingResponseListener() {
// TODO: Long Term Refactor - This Listener blocks until the full response is read and keeps it in memory.
// Find a way to stream the response body without completing the future
// We need two signals, one when the response is received, and one when the body is completely
// read.
// Should this method be completely replaced by consumeXxx()?
@Override
public void onComplete(Result result) {
future.complete(new JettyHttpResponse<>(
request, result.getResponse(), supportedResponse.process(result.getResponse(), getContent(), type)));
}
});
return interceptResponse(request.toBuilder(), future, r -> sendAsync(r, type));
}
@Override
public CompletableFuture<HttpResponse<AsyncBody>> consumeLines(
HttpRequest originalRequest, BodyConsumer<String> consumer) {
final var request = toStandardHttpRequest(originalRequest);
final var future = new JettyAsyncResponseListener<>(request, consumer) {
@Override
protected String process(Response response, ByteBuffer content) {
return JettyHttpResponse.SupportedResponse.TEXT.process(response, toArray(content), String.class);
}
}.listen(newRequest(request));
return interceptResponse(request.toBuilder(), future, r -> consumeLines(r, consumer));
}
@Override
public CompletableFuture<HttpResponse<AsyncBody>> consumeBytes(
HttpRequest originalRequest, BodyConsumer<List<ByteBuffer>> consumer) {
final var request = toStandardHttpRequest(originalRequest);
final var future = new JettyAsyncResponseListener<>(request, consumer) {
@Override
protected List<ByteBuffer> process(Response response, ByteBuffer content) {
return Collections.singletonList(content);
}
}.listen(newRequest(request));
return interceptResponse(request.toBuilder(), future, r -> consumeBytes(r, consumer));
}
@Override
public WebSocket.Builder newWebSocketBuilder() {
return new JettyWebSocketBuilder(jettyWs, builder.readTimeout);
}
@Override
public HttpRequest.Builder newHttpRequestBuilder() {
return new StandardHttpRequest.Builder();
}
@Override
public Factory getFactory() {
return factory;
}
private Request newRequest(StandardHttpRequest originalRequest) {
try {
jetty.start();
} catch (Exception e) {
throw KubernetesClientException.launderThrowable(e);
}
final var requestBuilder = originalRequest.toBuilder();
interceptors.forEach(i -> i.before(requestBuilder, originalRequest));
final var request = requestBuilder.build();
var jettyRequest = jetty.newRequest(request.uri()).method(request.method());
jettyRequest.timeout(builder.readTimeout.toMillis() + builder.writeTimeout.toMillis(), TimeUnit.MILLISECONDS);
jettyRequest.headers(m -> request.headers().forEach((k, l) -> l.forEach(v -> m.add(k, v))));
final var contentType = request.headers("Content-Type").stream().findAny();
if (request.bodyString() != null) {
jettyRequest.body(new StringRequestContent(contentType.orElse(TEXT_PLAIN), request.bodyString()));
} else if (request.bodyStream() != null) {
jettyRequest.body(new InputStreamRequestContent(contentType.orElse(APPLICATION_OCTET_STREAM), request.bodyStream()));
}
return jettyRequest;
}
private <T> CompletableFuture<HttpResponse<T>> interceptResponse(
StandardHttpRequest.Builder builder, CompletableFuture<HttpResponse<T>> originalResponse,
Function<HttpRequest, CompletableFuture<HttpResponse<T>>> function) {
for (var interceptor : interceptors) {
originalResponse = originalResponse.thenCompose(r -> {
if (!r.isSuccessful()) {
return interceptor.afterFailure(builder, r)
.thenCompose(b -> {
if (Boolean.TRUE.equals(b)) {
return function.apply(builder.build());
}
return CompletableFuture.completedFuture(r);
});
}
return CompletableFuture.completedFuture(r);
});
}
return originalResponse;
}
private static StandardHttpRequest toStandardHttpRequest(HttpRequest request) {
if (!(request instanceof StandardHttpRequest)) {
throw new IllegalArgumentException("Only StandardHttpRequest is supported");
}
return (StandardHttpRequest) request;
}
HttpClient getJetty() {
return jetty;
}
WebSocketClient getJettyWs() {
return jettyWs;
}
}