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
 * <>.

package org.apache.hc.core5.http.protocol;

import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.util.TimeZone;

import org.apache.hc.core5.annotation.Contract;
import org.apache.hc.core5.annotation.ThreadingBehavior;

 * Generates a date in the format required by the HTTP protocol.
 * @since 4.0
@Contract(threading = ThreadingBehavior.SAFE)
public class HttpDateGenerator {

    private static final int GRANULARITY_MILLIS = 1000;

    /** Date format pattern used to generate the header in RFC 1123 format. */
    public static final String PATTERN_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz";

     * @deprecated This attribute is no longer supported as a part of the public API.
     * The time zone to use in the date header.
    public static final TimeZone GMT = TimeZone.getTimeZone("GMT");

    public static final ZoneId GMT_ID = ZoneId.of("GMT");

    /** Singleton instance. */
    public static final HttpDateGenerator INSTANCE = new HttpDateGenerator(PATTERN_RFC1123, GMT_ID);

    private final DateTimeFormatter dateTimeFormatter;
    private long dateAsMillis;
    private String dateAsText;
    private ZoneId zoneId;

    HttpDateGenerator() {
        dateTimeFormatter =new DateTimeFormatterBuilder()
        zoneId = GMT_ID;


    private HttpDateGenerator(final String pattern, final ZoneId zoneId) {
        dateTimeFormatter = new DateTimeFormatterBuilder()
        this.zoneId =  zoneId;

    public synchronized String getCurrentDate() {
        final long now = System.currentTimeMillis();
        if (now - this.dateAsMillis > GRANULARITY_MILLIS) {
            // Generate new date string
            dateAsText = dateTimeFormatter.format(;
            dateAsMillis = now;
        return dateAsText;



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, 18929👍, 0💬