ratpack.http.client.internal.ContentAggregatingRequestAction.java Source code

Introduction

Here is the source code for ratpack.http.client.internal.ContentAggregatingRequestAction.java

Source

/*
 * Copyright 2014 the original author or authors.
 *
 * 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 ratpack.http.client.internal;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpObjectAggregator;
import ratpack.exec.Execution;
import ratpack.exec.Fulfiller;
import ratpack.func.Action;
import ratpack.http.Headers;
import ratpack.http.Status;
import ratpack.http.client.ReceivedResponse;
import ratpack.http.client.RequestSpec;
import ratpack.http.internal.*;

import java.net.URI;

class ContentAggregatingRequestAction extends RequestActionSupport<ReceivedResponse> {

    private final int maxContentLengthBytes;

    public ContentAggregatingRequestAction(Action<? super RequestSpec> requestConfigurer, URI uri,
            Execution execution, ByteBufAllocator byteBufAllocator, int maxContentLengthBytes) {
        super(requestConfigurer, uri, execution, byteBufAllocator);
        this.maxContentLengthBytes = maxContentLengthBytes;
    }

    @Override
    protected void addResponseHandlers(ChannelPipeline p, Fulfiller<? super ReceivedResponse> fulfiller) {
        p.addLast("aggregator", new HttpObjectAggregator(maxContentLengthBytes));
        p.addLast("httpResponseHandler", new SimpleChannelInboundHandler<FullHttpResponse>(false) {
            @Override
            public void channelRead0(ChannelHandlerContext ctx, FullHttpResponse msg) throws Exception {
                final Headers headers = new NettyHeadersBackedHeaders(msg.headers());
                String contentType = headers.get(HttpHeaderConstants.CONTENT_TYPE.toString());
                ByteBuf responseBuffer = initBufferReleaseOnExecutionClose(msg.content(), execution);
                final ByteBufBackedTypedData typedData = new ByteBufBackedTypedData(responseBuffer,
                        DefaultMediaType.get(contentType));
                final Status status = new DefaultStatus(msg.status());

                success(fulfiller, new DefaultReceivedResponse(status, headers, typedData));
            }

            @Override
            public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
                ctx.close();
                error(fulfiller, cause);
            }
        });
    }

    @Override
    protected RequestActionSupport<ReceivedResponse> buildRedirectRequestAction(
            Action<? super RequestSpec> redirectRequestConfig, URI locationUrl) {
        return new ContentAggregatingRequestAction(redirectRequestConfig, locationUrl, execution, byteBufAllocator,
                maxContentLengthBytes);
    }

    private static ByteBuf initBufferReleaseOnExecutionClose(final ByteBuf responseBuffer, Execution execution) {
        execution.onCleanup(responseBuffer::release);
        return responseBuffer;
    }

}