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 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.HttpResponse;
import org.apache.hc.core5.http.HttpResponseInterceptor;
import org.apache.hc.core5.http.HttpStatus;
import org.apache.hc.core5.http.HttpVersion;
import org.apache.hc.core5.http.ProtocolException;
import org.apache.hc.core5.http.ProtocolVersion;
import org.apache.hc.core5.http.message.MessageSupport;
import org.apache.hc.core5.util.Args;

 * ResponseContent is the most important interceptor for outgoing responses.
 * It is responsible for delimiting content length by adding
 * {@code Content-Length} or {@code Transfer-Content} headers based
 * on the properties of the enclosed entity and the protocol version.
 * This interceptor is required for correct functioning of server side protocol
 * processors.
 * @since 4.0
@Contract(threading = ThreadingBehavior.IMMUTABLE)
public class ResponseContent implements HttpResponseInterceptor {

    private final boolean overwrite;

     * Default constructor. The {@code Content-Length} or {@code Transfer-Encoding}
     * will cause the interceptor to throw {@link ProtocolException} if already present in the
     * response message.
    public ResponseContent() {

     * Constructor that can be used to fine-tune behavior of this interceptor.
     * @param overwrite If set to {@code true} the {@code Content-Length} and
     * {@code Transfer-Encoding} headers will be created or updated if already present.
     * If set to {@code false} the {@code Content-Length} and
     * {@code Transfer-Encoding} headers will cause the interceptor to throw
     * {@link ProtocolException} if already present in the response message.
     * @since 4.2
     public ResponseContent(final boolean overwrite) {
         this.overwrite = overwrite;

     * Processes the response (possibly updating or inserting) Content-Length and Transfer-Encoding headers.
     * @param response The HttpResponse to modify.
     * @param context Unused.
     * @throws ProtocolException If either the Content-Length or Transfer-Encoding headers are found.
     * @throws IllegalArgumentException If the response is null.
    public void process(final HttpResponse response, final EntityDetails entity, final HttpContext context)
            throws HttpException, IOException {
        Args.notNull(response, "HTTP response");
        if (this.overwrite) {
        } else {
            if (response.containsHeader(HttpHeaders.TRANSFER_ENCODING)) {
                throw new ProtocolException("Transfer-encoding header already present");
            if (response.containsHeader(HttpHeaders.CONTENT_LENGTH)) {
                throw new ProtocolException("Content-Length header already present");
        final ProtocolVersion ver = context.getProtocolVersion();
        if (entity != null) {
            final long len = entity.getContentLength();
            if (len >= 0 && !entity.isChunked()) {
                response.addHeader(HttpHeaders.CONTENT_LENGTH, Long.toString(entity.getContentLength()));
            } else if (ver.greaterEquals(HttpVersion.HTTP_1_1)) {
                response.addHeader(HttpHeaders.TRANSFER_ENCODING, HeaderElements.CHUNKED_ENCODING);
                MessageSupport.addTrailerHeader(response, entity);
            MessageSupport.addContentTypeHeader(response, entity);
            MessageSupport.addContentEncodingHeader(response, entity);
        } else {
            final int status = response.getCode();
            if (status != HttpStatus.SC_NO_CONTENT && status != HttpStatus.SC_NOT_MODIFIED) {
                response.addHeader(HttpHeaders.CONTENT_LENGTH, "0");



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

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