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.impl;

import org.apache.hc.core5.annotation.Contract;
import org.apache.hc.core5.annotation.ThreadingBehavior;
import org.apache.hc.core5.http.ContentLengthStrategy;
import org.apache.hc.core5.http.Header;
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.HttpMessage;
import org.apache.hc.core5.http.NotImplementedException;
import org.apache.hc.core5.http.ProtocolException;
import org.apache.hc.core5.util.Args;

 * The default implementation of the content length strategy. This class
 * will throw {@link ProtocolException} if it encounters an unsupported
 * transfer encoding, multiple {@code Content-Length} header
 * values or a malformed {@code Content-Length} header value.
 * <p>
 * This class recognizes "chunked" transfer-coding only.
 * @since 5.0
@Contract(threading = ThreadingBehavior.IMMUTABLE)
public class DefaultContentLengthStrategy implements ContentLengthStrategy {

    public static final DefaultContentLengthStrategy INSTANCE = new DefaultContentLengthStrategy();

     * Creates {@code DefaultContentLengthStrategy} instance. {@link ContentLengthStrategy#UNDEFINED}
     * is used per default when content length is not explicitly specified in the message.
    public DefaultContentLengthStrategy() {

    public long determineLength(final HttpMessage message) throws HttpException {
        Args.notNull(message, "HTTP message");
        // Although Transfer-Encoding is specified as a list, in practice
        // it is either missing or has the single value "chunked". So we
        // treat it as a single-valued header here.
        final Header transferEncodingHeader = message.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
        if (transferEncodingHeader != null) {
            final String headerValue = transferEncodingHeader.getValue();
            if (HeaderElements.CHUNKED_ENCODING.equalsIgnoreCase(headerValue)) {
                return CHUNKED;
            throw new NotImplementedException("Unsupported transfer encoding: " + headerValue);
        if (message.countHeaders(HttpHeaders.CONTENT_LENGTH) > 1) {
            throw new ProtocolException("Multiple Content-Length headers");
        final Header contentLengthHeader = message.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
        if (contentLengthHeader != null) {
            final String s = contentLengthHeader.getValue();
            try {
                final long len = Long.parseLong(s);
                if (len < 0) {
                    throw new ProtocolException("Negative content length: " + s);
                return len;
            } catch (final NumberFormatException e) {
                throw new ProtocolException("Invalid content length: " + s);
        return UNDEFINED;



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, 19279👍, 0💬