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.Internal;
import org.apache.hc.core5.http.EntityDetails;
import org.apache.hc.core5.http.HttpException;
import org.apache.hc.core5.http.HttpResponse;
import org.apache.hc.core5.http.HttpStatus;
import org.apache.hc.core5.http.MethodNotSupportedException;
import org.apache.hc.core5.http.MisdirectedRequestException;
import org.apache.hc.core5.http.NotImplementedException;
import org.apache.hc.core5.http.ProtocolException;
import org.apache.hc.core5.http.RequestHeaderFieldsTooLargeException;
import org.apache.hc.core5.http.UnsupportedHttpVersionException;

 * HTTP Server support methods.
 * @since 5.0
public class ServerSupport {

    public static void validateResponse(
            final HttpResponse response,
            final EntityDetails responseEntityDetails) throws HttpException {
        final int status = response.getCode();
        switch (status) {
            case HttpStatus.SC_NO_CONTENT:
            case HttpStatus.SC_NOT_MODIFIED:
                if (responseEntityDetails != null) {
                    throw new HttpException("Response " + status + " must not enclose an entity");

    public static String toErrorMessage(final Exception ex) {
        final String message = ex.getMessage();
        return message != null ? message : ex.toString();

    public static int toStatusCode(final Exception ex) {
        final int code;
        if (ex instanceof MethodNotSupportedException) {
            code = HttpStatus.SC_NOT_IMPLEMENTED;
        } else if (ex instanceof UnsupportedHttpVersionException) {
            code = HttpStatus.SC_HTTP_VERSION_NOT_SUPPORTED;
        } else if (ex instanceof NotImplementedException) {
            code = HttpStatus.SC_NOT_IMPLEMENTED;
        } else if (ex instanceof RequestHeaderFieldsTooLargeException) {
            code = HttpStatus.SC_REQUEST_HEADER_FIELDS_TOO_LARGE;
        } else if (ex instanceof MisdirectedRequestException) {
            code = HttpStatus.SC_MISDIRECTED_REQUEST;
        } else if (ex instanceof ProtocolException) {
            code = HttpStatus.SC_BAD_REQUEST;
        } else {
            code = HttpStatus.SC_INTERNAL_SERVER_ERROR;
        return code;



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, 18774👍, 0💬