HttpComponents Core Source Code Files

HttpComponents Core Source Code Files are provided in the source package file,

You can download as described in the previous tutorial and go to the "httpcore5/src" sub-folder to view Source Code files.

You can also browse HttpComponents Core Source Code below:



 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <>.

import java.nio.ByteBuffer;
import java.nio.charset.UnsupportedCharsetException;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;

import org.apache.hc.core5.concurrent.CallbackContribution;
import org.apache.hc.core5.concurrent.FutureCallback;
import org.apache.hc.core5.function.Supplier;
import org.apache.hc.core5.http.ContentType;
import org.apache.hc.core5.http.EntityDetails;
import org.apache.hc.core5.http.Header;
import org.apache.hc.core5.http.HttpException;
import org.apache.hc.core5.http.HttpRequest;
import org.apache.hc.core5.http.nio.AsyncEntityConsumer;
import org.apache.hc.core5.http.nio.AsyncRequestConsumer;
import org.apache.hc.core5.http.nio.CapacityChannel;
import org.apache.hc.core5.http.protocol.HttpContext;
import org.apache.hc.core5.util.Args;

 * Abstract asynchronous request consumer that makes use of {@link AsyncEntityConsumer}
 * to process request message content.
 * @param <T> request processing result representation.
 * @param <E> request entity representation.
 * @since 5.0
public abstract class AbstractAsyncRequesterConsumer<T, E> implements AsyncRequestConsumer<T> {

    private final Supplier<AsyncEntityConsumer<E>> dataConsumerSupplier;
    private final AtomicReference<AsyncEntityConsumer<E>> dataConsumerRef;

    public AbstractAsyncRequesterConsumer(final Supplier<AsyncEntityConsumer<E>> dataConsumerSupplier) {
        this.dataConsumerSupplier = Args.notNull(dataConsumerSupplier, "Data consumer supplier");
        this.dataConsumerRef = new AtomicReference<>();

    public AbstractAsyncRequesterConsumer(final AsyncEntityConsumer<E> dataConsumer) {
        this(() -> dataConsumer);

     * Triggered to generate object that represents a result of request message processing.
     * @param request the request message.
     * @param entity the request entity.
     * @param contentType the request content type.
     * @return the result of request processing.
    protected abstract T buildResult(HttpRequest request, E entity, ContentType contentType);

    public final void consumeRequest(
            final HttpRequest request,
            final EntityDetails entityDetails,
            final HttpContext httpContext, final FutureCallback<T> resultCallback) throws HttpException, IOException {
        if (entityDetails != null) {
            final AsyncEntityConsumer<E> dataConsumer = dataConsumerSupplier.get();
            if (dataConsumer == null) {
                throw new HttpException("Supplied data consumer is null");
            dataConsumer.streamStart(entityDetails, new CallbackContribution<E>(resultCallback) {

                public void completed(final E entity) {
                    final ContentType contentType;
                    try {
                        contentType = ContentType.parse(entityDetails.getContentType());
                        final T result = buildResult(request, entity, contentType);
                    } catch (final UnsupportedCharsetException ex) {

        } else {
            resultCallback.completed(buildResult(request, null, null));


    public final void updateCapacity(final CapacityChannel capacityChannel) throws IOException {
        final AsyncEntityConsumer<E> dataConsumer = dataConsumerRef.get();

    public final void consume(final ByteBuffer src) throws IOException {
        final AsyncEntityConsumer<E> dataConsumer = dataConsumerRef.get();

    public final void streamEnd(final List<? extends Header> trailers) throws HttpException, IOException {
        final AsyncEntityConsumer<E> dataConsumer = dataConsumerRef.get();

    public final void failed(final Exception cause) {

    public final void releaseResources() {
        final AsyncEntityConsumer<E> dataConsumer = dataConsumerRef.getAndSet(null);
        if (dataConsumer != null) {



Or download all them as a single archive file:

File name:
File size: 812477 bytes
Release date: 2022-11-10



Download and Install HttpComponents Core Source Package

Download and Review Apache HttpComponents-*.jar

⇑⇑ FAQ for Apache HttpComponents JAR Library

2023-03-07, 19274👍, 0💬