HttpComponents Core Source Code Files are provided in the source package file, httpcomponents-core-5.2-src.zip.

You can download httpcomponents-core-5.2-src.zip 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:

⏎ org/apache/hc/core5/http/HttpHeaders.java

/*
 * ====================================================================
 * 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
 *
 *   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.
 * ====================================================================
 *
 * 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
 * <http://www.apache.org/>.
 *
 */

package org.apache.hc.core5.http;

/**
 * Constants enumerating standard and common HTTP headers.
 *
 * @since 4.1
 */
public final class HttpHeaders {

    private HttpHeaders() {
        // Don't allow instantiation.
    }

    public static final String ACCEPT = "Accept";

    public static final String ACCEPT_CHARSET = "Accept-Charset";

    public static final String ACCEPT_ENCODING = "Accept-Encoding";

    public static final String ACCEPT_LANGUAGE = "Accept-Language";

    public static final String ACCEPT_RANGES = "Accept-Ranges";

    /**
     * The CORS {@code Access-Control-Allow-Credentials} response header field name.
     */
    public static final String ACCESS_CONTROL_ALLOW_CREDENTIALS = "Access-Control-Allow-Credentials";
    /**
     * The CORS {@code Access-Control-Allow-Headers} response header field name.
     */
    public static final String ACCESS_CONTROL_ALLOW_HEADERS = "Access-Control-Allow-Headers";
    /**
     * The CORS {@code Access-Control-Allow-Methods} response header field name.
     */
    public static final String ACCESS_CONTROL_ALLOW_METHODS = "Access-Control-Allow-Methods";
    /**
     * The CORS {@code Access-Control-Allow-Origin} response header field name.
     */
    public static final String ACCESS_CONTROL_ALLOW_ORIGIN = "Access-Control-Allow-Origin";
    /**
     * The CORS {@code Access-Control-Expose-Headers} response header field name.
     */
    public static final String ACCESS_CONTROL_EXPOSE_HEADERS = "Access-Control-Expose-Headers";
    /**
     * The CORS {@code Access-Control-Max-Age} response header field name.
     */
    public static final String ACCESS_CONTROL_MAX_AGE = "Access-Control-Max-Age";
    /**
     * The CORS {@code Access-Control-Request-Headers} request header field name.
     */
    public static final String ACCESS_CONTROL_REQUEST_HEADERS = "Access-Control-Request-Headers";
    /**
     * The CORS {@code Access-Control-Request-Method} request header field name.
     */
    public static final String ACCESS_CONTROL_REQUEST_METHOD = "Access-Control-Request-Method";

    public static final String AGE = "Age";

    public static final String ALLOW = "Allow";

    public static final String AUTHORIZATION = "Authorization";

    public static final String CACHE_CONTROL = "Cache-Control";

    public static final String CONNECTION = "Connection";

    public static final String CONTENT_ENCODING = "Content-Encoding";
    /**
     * The HTTP {@code Content-Disposition} header field name.
     */
    public static final String CONTENT_DISPOSITION = "Content-Disposition";

    public static final String CONTENT_LANGUAGE = "Content-Language";

    public static final String CONTENT_LENGTH = "Content-Length";

    public static final String CONTENT_LOCATION = "Content-Location";

    public static final String CONTENT_MD5 = "Content-MD5";

    public static final String CONTENT_RANGE = "Content-Range";

    public static final String CONTENT_TYPE = "Content-Type";

    /**
     * The HTTP {@code Cookie} header field name.
     */
    public static final String COOKIE = "Cookie";

    public static final String DATE = "Date";

    public static final String DAV = "Dav";

    public static final String DEPTH = "Depth";

    public static final String DESTINATION = "Destination";

    public static final String ETAG = "ETag";

    public static final String EXPECT = "Expect";

    public static final String EXPIRES = "Expires";

    public static final String FROM = "From";

    public static final String HOST = "Host";

    public static final String IF = "If";

    public static final String IF_MATCH = "If-Match";

    public static final String IF_MODIFIED_SINCE = "If-Modified-Since";

    public static final String IF_NONE_MATCH = "If-None-Match";

    public static final String IF_RANGE = "If-Range";

    public static final String IF_UNMODIFIED_SINCE = "If-Unmodified-Since";

    public static final String KEEP_ALIVE = "Keep-Alive";

    public static final String LAST_MODIFIED = "Last-Modified";

    /**
     * The HTTP {@code Link} header field name.
     */
    public static final String LINK = "Link";

    public static final String LOCATION = "Location";

    public static final String LOCK_TOKEN = "Lock-Token";

    public static final String MAX_FORWARDS = "Max-Forwards";

    public static final String OVERWRITE = "Overwrite";

    public static final String PRAGMA = "Pragma";

    public static final String PROXY_AUTHENTICATE = "Proxy-Authenticate";

    public static final String PROXY_AUTHORIZATION = "Proxy-Authorization";

    public static final String PROXY_CONNECTION = "Proxy-Connection";

    public static final String RANGE = "Range";

    public static final String REFERER = "Referer";

    public static final String RETRY_AFTER = "Retry-After";

    public static final String SERVER = "Server";

    public static final String STATUS_URI = "Status-URI";

    /**
     * The HTTP {@code Set-Cookie} header field name.
     */
    public static final String SET_COOKIE = "Set-Cookie";

    public static final String TE = "TE";

    public static final String TIMEOUT = "Timeout";

    public static final String TRAILER = "Trailer";

    public static final String TRANSFER_ENCODING = "Transfer-Encoding";

    public static final String UPGRADE = "Upgrade";

    public static final String USER_AGENT = "User-Agent";

    public static final String VARY = "Vary";

    public static final String VIA = "Via";

    public static final String WARNING = "Warning";

    public static final String WWW_AUTHENTICATE = "WWW-Authenticate";

}

⏎ org/apache/hc/core5/http/HttpHeaders.java

Or download all them as a single archive file:

File name: httpcore5-5.2-fyi.zip
File size: 812477 bytes
Release date: 2022-11-10
Download 

⇒ Donwload httpcomponents-client-4.5.3-bin.zip

⇐ Download and Install HttpComponents Core Source Package

⇑ Download and Review Apache HttpComponents-*.jar

⇑⇑ FAQ for Apache HttpComponents JAR Library