| /* |
| * ==================================================================== |
| * 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.client5.http.impl.sync; |
| |
| import java.io.IOException; |
| |
| import org.apache.hc.client5.http.protocol.HttpResponseException; |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.http.ClassicHttpResponse; |
| import org.apache.hc.core5.http.HttpEntity; |
| import org.apache.hc.core5.http.HttpStatus; |
| import org.apache.hc.core5.http.io.ResponseHandler; |
| import org.apache.hc.core5.http.io.entity.EntityUtils; |
| |
| /** |
| * A generic {@link ResponseHandler} that works with the response entity |
| * for successful (2xx) responses. If the response code was >= 300, the response |
| * body is consumed and an {@link HttpResponseException} is thrown. |
| * <p> |
| * If this is used with |
| * {@link org.apache.hc.client5.http.sync.HttpClient#execute(org.apache.hc.core5.http.ClassicHttpRequest, |
| * ResponseHandler)}, |
| * HttpClient may handle redirects (3xx responses) internally. |
| * </p> |
| * |
| * @since 4.4 |
| */ |
| @Contract(threading = ThreadingBehavior.IMMUTABLE) |
| public abstract class AbstractResponseHandler<T> implements ResponseHandler<T> { |
| |
| /** |
| * Read the entity from the response body and pass it to the entity handler |
| * method 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}. |
| */ |
| @Override |
| public T handleResponse(final ClassicHttpResponse response) throws IOException { |
| final HttpEntity entity = response.getEntity(); |
| if (response.getCode() >= HttpStatus.SC_REDIRECTION) { |
| EntityUtils.consume(entity); |
| throw new HttpResponseException(response.getCode(), response.getReasonPhrase()); |
| } |
| return entity == null ? null : handleEntity(entity); |
| } |
| |
| /** |
| * Handle the response entity and transform it into the actual response |
| * object. |
| */ |
| public abstract T handleEntity(HttpEntity entity) throws IOException; |
| |
| } |