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org.asynchttpclient.shaded.netty.handler.HttpHandler Maven / Gradle / Ivy
/*
* Copyright (c) 2014 AsyncHttpClient Project. All rights reserved.
*
* This program is licensed to you under the Apache License Version 2.0,
* and you may not use this file except in compliance with the Apache License Version 2.0.
* You may obtain a copy of the Apache License Version 2.0 at
* http://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the Apache License Version 2.0 is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
*/
package org.asynchttpclient.shaded.netty.handler;
import org.asynchttpclient.shaded.io.netty.buffer.ByteBuf;
import org.asynchttpclient.shaded.io.netty.channel.Channel;
import org.asynchttpclient.shaded.io.netty.channel.ChannelHandler.Sharable;
import org.asynchttpclient.shaded.io.netty.handler.codec.DecoderResultProvider;
import org.asynchttpclient.shaded.io.netty.handler.codec.http.*;
import org.asynchttpclient.shaded.AsyncHandler;
import org.asynchttpclient.shaded.AsyncHandler.State;
import org.asynchttpclient.shaded.AsyncHttpClientConfig;
import org.asynchttpclient.shaded.HttpResponseBodyPart;
import org.asynchttpclient.shaded.handler.StreamedAsyncHandler;
import org.asynchttpclient.shaded.netty.NettyResponseFuture;
import org.asynchttpclient.shaded.netty.NettyResponseStatus;
import org.asynchttpclient.shaded.netty.channel.ChannelManager;
import org.asynchttpclient.shaded.netty.channel.Channels;
import org.asynchttpclient.shaded.netty.request.NettyRequestSender;
import java.io.IOException;
import java.net.InetSocketAddress;
@Sharable
public final class HttpHandler extends AsyncHttpClientHandler {
public HttpHandler(AsyncHttpClientConfig config, ChannelManager channelManager, NettyRequestSender requestSender) {
super(config, channelManager, requestSender);
}
private boolean abortAfterHandlingStatus(//
AsyncHandler handler,
NettyResponseStatus status) throws Exception {
return handler.onStatusReceived(status) == State.ABORT;
}
private boolean abortAfterHandlingHeaders(AsyncHandler handler,
HttpHeaders responseHeaders) throws Exception {
return !responseHeaders.isEmpty() && handler.onHeadersReceived(responseHeaders) == State.ABORT;
}
private boolean abortAfterHandlingReactiveStreams(Channel channel,
NettyResponseFuture future,
AsyncHandler handler) {
if (handler instanceof StreamedAsyncHandler) {
StreamedAsyncHandler streamedAsyncHandler = (StreamedAsyncHandler) handler;
StreamedResponsePublisher publisher = new StreamedResponsePublisher(channel.eventLoop(), channelManager, future, channel);
// FIXME do we really need to pass the event loop?
// FIXME move this to ChannelManager
channel.pipeline().addLast(channel.eventLoop(), "streamedAsyncHandler", publisher);
Channels.setAttribute(channel, publisher);
return streamedAsyncHandler.onStream(publisher) == State.ABORT;
}
return false;
}
private void handleHttpResponse(final HttpResponse response, final Channel channel, final NettyResponseFuture future, AsyncHandler handler) throws Exception {
HttpRequest httpRequest = future.getNettyRequest().getHttpRequest();
logger.debug("\n\nRequest {}\n\nResponse {}\n", httpRequest, response);
future.setKeepAlive(config.getKeepAliveStrategy().keepAlive((InetSocketAddress) channel.remoteAddress(), future.getTargetRequest(), httpRequest, response));
NettyResponseStatus status = new NettyResponseStatus(future.getUri(), response, channel);
HttpHeaders responseHeaders = response.headers();
if (!interceptors.exitAfterIntercept(channel, future, handler, response, status, responseHeaders)) {
boolean abort = abortAfterHandlingStatus(handler, status) || //
abortAfterHandlingHeaders(handler, responseHeaders) || //
abortAfterHandlingReactiveStreams(channel, future, handler);
if (abort) {
finishUpdate(future, channel, true);
}
}
}
private void handleChunk(HttpContent chunk,
final Channel channel,
final NettyResponseFuture future,
AsyncHandler handler) throws Exception {
boolean abort = false;
boolean last = chunk instanceof LastHttpContent;
// Netty 4: the last chunk is not empty
if (last) {
LastHttpContent lastChunk = (LastHttpContent) chunk;
HttpHeaders trailingHeaders = lastChunk.trailingHeaders();
if (!trailingHeaders.isEmpty()) {
abort = handler.onTrailingHeadersReceived(trailingHeaders) == State.ABORT;
}
}
ByteBuf buf = chunk.content();
if (!abort && !(handler instanceof StreamedAsyncHandler) && (buf.isReadable() || last)) {
HttpResponseBodyPart bodyPart = config.getResponseBodyPartFactory().newResponseBodyPart(buf, last);
abort = handler.onBodyPartReceived(bodyPart) == State.ABORT;
}
if (abort || last) {
boolean close = abort || !future.isKeepAlive();
finishUpdate(future, channel, close);
}
}
@Override
public void handleRead(final Channel channel, final NettyResponseFuture future, final Object e) throws Exception {
// future is already done because of an exception or a timeout
if (future.isDone()) {
// FIXME isn't the channel already properly closed?
channelManager.closeChannel(channel);
return;
}
AsyncHandler handler = future.getAsyncHandler();
try {
if (e instanceof DecoderResultProvider) {
DecoderResultProvider object = (DecoderResultProvider) e;
Throwable t = object.decoderResult().cause();
if (t != null) {
readFailed(channel, future, t);
return;
}
}
if (e instanceof HttpResponse) {
handleHttpResponse((HttpResponse) e, channel, future, handler);
} else if (e instanceof HttpContent) {
handleChunk((HttpContent) e, channel, future, handler);
}
} catch (Exception t) {
// e.g. an IOException when trying to open a connection and send the
// next request
if (hasIOExceptionFilters//
&& t instanceof IOException//
&& requestSender.applyIoExceptionFiltersAndReplayRequest(future, (IOException) t, channel)) {
return;
}
readFailed(channel, future, t);
throw t;
}
}
private void readFailed(Channel channel, NettyResponseFuture future, Throwable t) {
try {
requestSender.abort(channel, future, t);
} catch (Exception abortException) {
logger.debug("Abort failed", abortException);
} finally {
finishUpdate(future, channel, true);
}
}
@Override
public void handleException(NettyResponseFuture future, Throwable error) {
}
@Override
public void handleChannelInactive(NettyResponseFuture future) {
}
}
