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.impl.classic;

import java.util.List;
import java.util.concurrent.ConcurrentLinkedQueue;

import org.apache.hc.client5.http.ClientProtocolException;
import org.apache.hc.client5.http.HttpRoute;
import org.apache.hc.client5.http.auth.AuthSchemeFactory;
import org.apache.hc.client5.http.auth.CredentialsProvider;
import org.apache.hc.client5.http.classic.ExecChain;
import org.apache.hc.client5.http.classic.ExecRuntime;
import org.apache.hc.client5.http.config.Configurable;
import org.apache.hc.client5.http.config.RequestConfig;
import org.apache.hc.client5.http.cookie.CookieSpecFactory;
import org.apache.hc.client5.http.cookie.CookieStore;
import org.apache.hc.client5.http.impl.ExecSupport;
import org.apache.hc.client5.http.protocol.HttpClientContext;
import org.apache.hc.client5.http.routing.HttpRoutePlanner;
import org.apache.hc.client5.http.routing.RoutingSupport;
import org.apache.hc.core5.annotation.Contract;
import org.apache.hc.core5.annotation.Internal;
import org.apache.hc.core5.annotation.ThreadingBehavior;
import org.apache.hc.core5.concurrent.CancellableDependency;
import org.apache.hc.core5.http.ClassicHttpRequest;
import org.apache.hc.core5.http.ClassicHttpResponse;
import org.apache.hc.core5.http.HttpException;
import org.apache.hc.core5.http.HttpHost;
import org.apache.hc.core5.http.config.Lookup;
import org.apache.hc.core5.http.protocol.BasicHttpContext;
import org.apache.hc.core5.http.protocol.HttpContext;
import org.apache.hc.core5.util.Args;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

 * Internal implementation of {@link CloseableHttpClient}.
 * <p>
 * Concurrent message exchanges executed by this client will get assigned to
 * separate connections leased from the connection pool.
 * </p>
 * @since 4.3
@Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL)
class InternalHttpClient extends CloseableHttpClient implements Configurable {

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

    private final HttpClientConnectionManager connManager;
    private final HttpRequestExecutor requestExecutor;
    private final ExecChainElement execChain;
    private final HttpRoutePlanner routePlanner;
    private final Lookup<CookieSpecFactory> cookieSpecRegistry;
    private final Lookup<AuthSchemeFactory> authSchemeRegistry;
    private final CookieStore cookieStore;
    private final CredentialsProvider credentialsProvider;
    private final RequestConfig defaultConfig;
    private final ConcurrentLinkedQueue<Closeable> closeables;

    public InternalHttpClient(
            final HttpClientConnectionManager connManager,
            final HttpRequestExecutor requestExecutor,
            final ExecChainElement execChain,
            final HttpRoutePlanner routePlanner,
            final Lookup<CookieSpecFactory> cookieSpecRegistry,
            final Lookup<AuthSchemeFactory> authSchemeRegistry,
            final CookieStore cookieStore,
            final CredentialsProvider credentialsProvider,
            final RequestConfig defaultConfig,
            final List<Closeable> closeables) {
        this.connManager = Args.notNull(connManager, "Connection manager");
        this.requestExecutor = Args.notNull(requestExecutor, "Request executor");
        this.execChain = Args.notNull(execChain, "Execution chain");
        this.routePlanner = Args.notNull(routePlanner, "Route planner");
        this.cookieSpecRegistry = cookieSpecRegistry;
        this.authSchemeRegistry = authSchemeRegistry;
        this.cookieStore = cookieStore;
        this.credentialsProvider = credentialsProvider;
        this.defaultConfig = defaultConfig;
        this.closeables = closeables != null ?  new ConcurrentLinkedQueue<>(closeables) : null;

    private HttpRoute determineRoute(final HttpHost target, final HttpContext context) throws HttpException {
        return this.routePlanner.determineRoute(target, context);

    private void setupContext(final HttpClientContext context) {
        if (context.getAttribute(HttpClientContext.AUTHSCHEME_REGISTRY) == null) {
            context.setAttribute(HttpClientContext.AUTHSCHEME_REGISTRY, this.authSchemeRegistry);
        if (context.getAttribute(HttpClientContext.COOKIESPEC_REGISTRY) == null) {
            context.setAttribute(HttpClientContext.COOKIESPEC_REGISTRY, this.cookieSpecRegistry);
        if (context.getAttribute(HttpClientContext.COOKIE_STORE) == null) {
            context.setAttribute(HttpClientContext.COOKIE_STORE, this.cookieStore);
        if (context.getAttribute(HttpClientContext.CREDS_PROVIDER) == null) {
            context.setAttribute(HttpClientContext.CREDS_PROVIDER, this.credentialsProvider);
        if (context.getAttribute(HttpClientContext.REQUEST_CONFIG) == null) {
            context.setAttribute(HttpClientContext.REQUEST_CONFIG, this.defaultConfig);

    protected CloseableHttpResponse doExecute(
            final HttpHost target,
            final ClassicHttpRequest request,
            final HttpContext context) throws IOException {
        Args.notNull(request, "HTTP request");
        try {
            final HttpClientContext localcontext = HttpClientContext.adapt(
                    context != null ? context : new BasicHttpContext());
            RequestConfig config = null;
            if (request instanceof Configurable) {
                config = ((Configurable) request).getConfig();
            if (config != null) {
            final HttpRoute route = determineRoute(
                    target != null ? target : RoutingSupport.determineHost(request),
            final String exchangeId = ExecSupport.getNextExchangeId();
            if (LOG.isDebugEnabled()) {
                LOG.debug("{} preparing request execution", exchangeId);

            final ExecRuntime execRuntime = new InternalExecRuntime(LOG, connManager, requestExecutor,
                    request instanceof CancellableDependency ? (CancellableDependency) request : null);
            final ExecChain.Scope scope = new ExecChain.Scope(exchangeId, route, request, execRuntime, localcontext);
            final ClassicHttpResponse response = this.execChain.execute(ClassicRequestBuilder.copy(request).build(), scope);
            return CloseableHttpResponse.adapt(response);
        } catch (final HttpException httpException) {
            throw new ClientProtocolException(httpException.getMessage(), httpException);

    public RequestConfig getConfig() {
        return this.defaultConfig;

    public void close() {

    public void close(final CloseMode closeMode) {
        if (this.closeables != null) {
            Closeable closeable;
            while ((closeable = this.closeables.poll()) != null) {
                try {
                    if (closeable instanceof ModalCloseable) {
                        ((ModalCloseable) closeable).close(closeMode);
                    } else {
                } catch (final IOException ex) {
                    LOG.error(ex.getMessage(), ex);



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, 9208👍, 1💬