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Signed-off-by: Maxim Nesen <[email protected]>
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...ector/src/main/java/org/glassfish/jersey/netty/connector/JerseyExpectContinueHandler.java
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/* | ||
* Copyright (c) 2023 Oracle and/or its affiliates. All rights reserved. | ||
* | ||
* This program and the accompanying materials are made available under the | ||
* terms of the Eclipse Public License v. 2.0, which is available at | ||
* http://www.eclipse.org/legal/epl-2.0. | ||
* | ||
* This Source Code may also be made available under the following Secondary | ||
* Licenses when the conditions for such availability set forth in the | ||
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License, | ||
* version 2 with the GNU Classpath Exception, which is available at | ||
* https://www.gnu.org/software/classpath/license.html. | ||
* | ||
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 | ||
*/ | ||
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package org.glassfish.jersey.netty.connector; | ||
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import io.netty.channel.Channel; | ||
import io.netty.channel.ChannelFuture; | ||
import io.netty.channel.ChannelHandlerContext; | ||
import io.netty.channel.ChannelInboundHandlerAdapter; | ||
import io.netty.handler.codec.http.DefaultFullHttpRequest; | ||
import io.netty.handler.codec.http.HttpRequest; | ||
import io.netty.handler.codec.http.HttpResponse; | ||
import io.netty.handler.codec.http.HttpResponseStatus; | ||
import io.netty.handler.codec.http.HttpUtil; | ||
import org.glassfish.jersey.client.ClientRequest; | ||
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import javax.ws.rs.ProcessingException; | ||
import java.util.Arrays; | ||
import java.util.List; | ||
import java.util.concurrent.CompletableFuture; | ||
import java.util.concurrent.ExecutionException; | ||
import java.util.concurrent.TimeUnit; | ||
import java.util.concurrent.TimeoutException; | ||
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public class JerseyExpectContinueHandler extends ChannelInboundHandlerAdapter { | ||
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private boolean isExpected; | ||
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private static final List<HttpResponseStatus> statusesToBeConsidered = Arrays.asList(HttpResponseStatus.CONTINUE, | ||
HttpResponseStatus.UNAUTHORIZED, HttpResponseStatus.EXPECTATION_FAILED, | ||
HttpResponseStatus.METHOD_NOT_ALLOWED, HttpResponseStatus.REQUEST_ENTITY_TOO_LARGE); | ||
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private CompletableFuture<HttpResponseStatus> expectedFuture = new CompletableFuture<>(); | ||
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@Override | ||
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { | ||
if (isExpected && msg instanceof HttpResponse) { | ||
final HttpResponse response = (HttpResponse) msg; | ||
if (statusesToBeConsidered.contains(response.status())) { | ||
expectedFuture.complete(response.status()); | ||
} | ||
if (!HttpResponseStatus.CONTINUE.equals(response.status())) { | ||
ctx.fireChannelRead(msg); //bypass the message to the next handler in line | ||
} else { | ||
ctx.pipeline().remove(this); | ||
} | ||
} else { | ||
if (!isExpected) { | ||
ctx.pipeline().remove(this); | ||
} | ||
ctx.fireChannelRead(msg); //bypass the message to the next handler in line | ||
} | ||
} | ||
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CompletableFuture<HttpResponseStatus> processExpect100ContinueRequest(HttpRequest nettyRequest, | ||
ClientRequest jerseyRequest, | ||
Channel ch, | ||
Integer timeout) | ||
throws InterruptedException, ExecutionException, TimeoutException { | ||
//check for 100-Continue presence/availability | ||
final Expect100ContinueConnectorExtension expect100ContinueExtension | ||
= new Expect100ContinueConnectorExtension(); | ||
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final DefaultFullHttpRequest nettyRequestHeaders = | ||
new DefaultFullHttpRequest(nettyRequest.protocolVersion(), nettyRequest.method(), nettyRequest.uri()); | ||
nettyRequestHeaders.headers().setAll(nettyRequest.headers()); | ||
//If Expect:100-continue feature is enabled and client supports it, the nettyRequestHeaders will be | ||
//enriched with the 'Expect:100-continue' header. | ||
expect100ContinueExtension.invoke(jerseyRequest, nettyRequestHeaders); | ||
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final ChannelFuture expect100ContinueFuture = (HttpUtil.is100ContinueExpected(nettyRequestHeaders)) | ||
// Send only head of the HTTP request enriched with Expect:100-continue header. | ||
? ch.writeAndFlush(nettyRequestHeaders) | ||
// Expect:100-Continue either is not supported or is turned off | ||
: null; | ||
isExpected = expect100ContinueFuture != null; | ||
if (!isExpected) { | ||
ch.pipeline().remove(this); | ||
} else { | ||
final HttpResponseStatus status = expectedFuture | ||
.get(timeout, TimeUnit.MILLISECONDS); | ||
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processExpectationStatus(status); | ||
} | ||
return expectedFuture; | ||
} | ||
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private void processExpectationStatus(HttpResponseStatus status) | ||
throws TimeoutException { | ||
if (!statusesToBeConsidered.contains(status)) { | ||
throw new ProcessingException(LocalizationMessages | ||
.UNEXPECTED_VALUE_FOR_EXPECT_100_CONTINUE_STATUSES(status.code()), null); | ||
} | ||
if (!expectedFuture.isDone() || HttpResponseStatus.EXPECTATION_FAILED.equals(status)) { | ||
isExpected = false; | ||
throw new TimeoutException(); // continue without expectations | ||
} | ||
if (!HttpResponseStatus.CONTINUE.equals(status)) { | ||
throw new ProcessingException(LocalizationMessages | ||
.UNEXPECTED_VALUE_FOR_EXPECT_100_CONTINUE_STATUSES(status.code()), null); | ||
} | ||
} | ||
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boolean isExpected() { | ||
return isExpected; | ||
} | ||
} |
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