HttpComponents Client Source Code Files

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

You can download as described in the previous tutorial and go to the "httpclient5/src" sub-folder to view Source Code files.

You can also browse HttpComponents Client 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
 * <>.

package org.apache.hc.client5.http.protocol;


import org.apache.hc.client5.http.RouteInfo;
import org.apache.hc.core5.annotation.Contract;
import org.apache.hc.core5.annotation.ThreadingBehavior;
import org.apache.hc.core5.http.EntityDetails;
import org.apache.hc.core5.http.HeaderElements;
import org.apache.hc.core5.http.HttpException;
import org.apache.hc.core5.http.HttpHeaders;
import org.apache.hc.core5.http.HttpRequest;
import org.apache.hc.core5.http.HttpRequestInterceptor;
import org.apache.hc.core5.http.Method;
import org.apache.hc.core5.http.protocol.HttpContext;
import org.apache.hc.core5.util.Args;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

 * This protocol interceptor is responsible for adding the {@code Connection}
 * header to the outgoing requests, which is essential for managing persistence
 * of {@code HTTP/1.0} connections.
 * @since 4.0
@Contract(threading = ThreadingBehavior.STATELESS)
public class RequestClientConnControl implements HttpRequestInterceptor {

    private static final Logger LOG = LoggerFactory.getLogger(RequestClientConnControl.class);

    public RequestClientConnControl() {

    public void process(final HttpRequest request, final EntityDetails entity, final HttpContext context)
            throws HttpException, IOException {
        Args.notNull(request, "HTTP request");

        final String method = request.getMethod();
        if (Method.CONNECT.isSame(method)) {

        final HttpClientContext clientContext = HttpClientContext.adapt(context);
        final String exchangeId = clientContext.getExchangeId();

        // Obtain the client connection (required)
        final RouteInfo route = clientContext.getHttpRoute();
        if (route == null) {
            if (LOG.isDebugEnabled()) {
                LOG.debug("{} Connection route not set in the context", exchangeId);

        if (route.getHopCount() == 1 || route.isTunnelled()) {
            if (!request.containsHeader(HttpHeaders.CONNECTION)) {
                request.addHeader(HttpHeaders.CONNECTION, HeaderElements.KEEP_ALIVE);



Or download all them as a single archive file:

File name:
File size: 625318 bytes
Release date: 2022-11-10


Download and Install HttpComponents Core Binary Package

Download and Install HttpComponents Client Source Package

Download and Review Apache HttpComponents-*.jar

⇑⇑ FAQ for Apache HttpComponents JAR Library

2023-03-26, 9667👍, 1💬