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Java example source code file (BasicResponseHandler.java)

This example source code file (BasicResponseHandler.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java tags/keywords

basicresponsehandler, httpentity, httpresponse, httpresponseexception, immutable, io, ioexception, statusline, string

The BasicResponseHandler.java example source code

 * ====================================================================
 * 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
 * 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.http.impl.client;

import java.io.IOException;

import org.apache.http.annotation.Immutable;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.HttpResponseException;
import org.apache.http.util.EntityUtils;

 * A {@link ResponseHandler} that returns the response body as a String
 * for successful (2xx) responses. If the response code was >= 300, the response
 * body is consumed and an {@link HttpResponseException} is thrown.
 * If this is used with
 * {@link org.apache.http.client.HttpClient#execute(
 *  org.apache.http.client.methods.HttpUriRequest, ResponseHandler)},
 * HttpClient may handle redirects (3xx responses) internally.
 * @since 4.0
public class BasicResponseHandler implements ResponseHandler<String> {

     * Returns the response body as a String if the response was successful (a
     * 2xx status code). If no response body exists, this returns null. If the
     * response was unsuccessful (>= 300 status code), throws an
     * {@link HttpResponseException}.
    public String handleResponse(final HttpResponse response)
            throws HttpResponseException, IOException {
        StatusLine statusLine = response.getStatusLine();
        if (statusLine.getStatusCode() >= 300) {
            throw new HttpResponseException(statusLine.getStatusCode(),

        HttpEntity entity = response.getEntity();
        return entity == null ? null : EntityUtils.toString(entity);


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