spring RequestCallback 源码
spring RequestCallback 代码
文件路径：/spring-web/src/main/java/org/springframework/web/client/RequestCallback.java
/*
* Copyright 2002-2021 the original author or authors.
*
* Licensed 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
*
* https://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.
*/
package org.springframework.web.client;
import java.io.IOException;
import java.lang.reflect.Type;
import org.springframework.http.client.ClientHttpRequest;
/**
* Callback interface for code that operates on a {@link ClientHttpRequest}.
* Allows manipulating the request headers, and write to the request body.
*
* <p>Used internally by the {@link RestTemplate}, but also useful for
* application code. There several available factory methods:
* <ul>
* <li>{@link RestTemplate#acceptHeaderRequestCallback(Class)}
* <li>{@link RestTemplate#httpEntityCallback(Object)}
* <li>{@link RestTemplate#httpEntityCallback(Object, Type)}
* </ul>
*
* @author Arjen Poutsma
* @since 3.0
* @see RestTemplate#execute
*/
@FunctionalInterface
public interface RequestCallback {
/**
* Gets called by {@link RestTemplate#execute} with an opened {@code ClientHttpRequest}.
* Does not need to care about closing the request or about handling errors:
* this will all be handled by the {@code RestTemplate}.
* @param request the active HTTP request
* @throws IOException in case of I/O errors
*/
void doWithRequest(ClientHttpRequest request) throws IOException;
}
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