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/protocol/RequestExpectContinue.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.protocol;

import java.io.IOException;

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.HttpVersion;
import org.apache.hc.core5.http.ProtocolVersion;
import org.apache.hc.core5.util.Args;

/**
 * RequestExpectContinue is responsible for enabling the 'expect-continue'
 * handshake by adding {@code Expect} header. This interceptor is
 * recommended for client side protocol processors.
 *
 * @since 4.0
 */
@Contract(threading = ThreadingBehavior.IMMUTABLE)
public class RequestExpectContinue implements HttpRequestInterceptor {

    /**
     * Singleton instance.
     *
     * @since 5.2
     */
    public static final RequestExpectContinue INSTANCE = new RequestExpectContinue();

    public RequestExpectContinue() {
        super();
    }

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

        if (!request.containsHeader(HttpHeaders.EXPECT)) {
            if (entity != null) {
                final ProtocolVersion ver = context.getProtocolVersion();
                // Do not send the expect header if request body is known to be empty
                if (entity.getContentLength() != 0 && !ver.lessEquals(HttpVersion.HTTP_1_0)) {
                    request.addHeader(HttpHeaders.EXPECT, HeaderElements.CONTINUE);
                }
            }
        }
    }

}

⏎ org/apache/hc/core5/http/protocol/RequestExpectContinue.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