/*
 * Copyright 2002-2018 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.
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package org.springframework.http;

import java.io.File;
import java.nio.file.Path;

import reactor.core.publisher.Mono;

Sub-interface of ReactiveOutputMessage that has support for "zero-copy" file transfers.
Author:Arjen Poutsma, Juergen Hoeller
See Also:
Since:5.0
/** * Sub-interface of {@code ReactiveOutputMessage} that has support for "zero-copy" * file transfers. * * @author Arjen Poutsma * @author Juergen Hoeller * @since 5.0 * @see <a href="https://en.wikipedia.org/wiki/Zero-copy">Zero-copy</a> */
public interface ZeroCopyHttpOutputMessage extends ReactiveHttpOutputMessage {
Use the given File to write the body of the message to the underlying HTTP layer.
Params:
  • file – the file to transfer
  • position – the position within the file from which the transfer is to begin
  • count – the number of bytes to be transferred
Returns:a publisher that indicates completion or error.
/** * Use the given {@link File} to write the body of the message to the underlying * HTTP layer. * @param file the file to transfer * @param position the position within the file from which the transfer is to begin * @param count the number of bytes to be transferred * @return a publisher that indicates completion or error. */
default Mono<Void> writeWith(File file, long position, long count) { return writeWith(file.toPath(), position, count); }
Use the given Path to write the body of the message to the underlying HTTP layer.
Params:
  • file – the file to transfer
  • position – the position within the file from which the transfer is to begin
  • count – the number of bytes to be transferred
Returns:a publisher that indicates completion or error.
Since:5.1
/** * Use the given {@link Path} to write the body of the message to the underlying * HTTP layer. * @param file the file to transfer * @param position the position within the file from which the transfer is to begin * @param count the number of bytes to be transferred * @return a publisher that indicates completion or error. * @since 5.1 */
Mono<Void> writeWith(Path file, long position, long count); }