org.springframework.http.converter.ByteArrayHttpMessageConverter Maven / Gradle / Ivy
/*
* Copyright 2002-2019 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.http.converter;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.MediaType;
import org.springframework.lang.Nullable;
import org.springframework.util.StreamUtils;
/**
* Implementation of {@link HttpMessageConverter} that can read and write byte arrays.
*
* By default, this converter supports all media types (*/*), and
* writes with a {@code Content-Type} of {@code application/octet-stream}. This can be
* overridden by setting the {@link #setSupportedMediaTypes supportedMediaTypes} property.
*
* @author Arjen Poutsma
* @author Juergen Hoeller
* @since 3.0
*/
public class ByteArrayHttpMessageConverter extends AbstractHttpMessageConverter {
/**
* Create a new instance of the {@code ByteArrayHttpMessageConverter}.
*/
public ByteArrayHttpMessageConverter() {
super(MediaType.APPLICATION_OCTET_STREAM, MediaType.ALL);
}
@Override
public boolean supports(Class clazz) {
return byte[].class == clazz;
}
@Override
public byte[] readInternal(Class clazz, HttpInputMessage inputMessage) throws IOException {
long contentLength = inputMessage.getHeaders().getContentLength();
ByteArrayOutputStream bos =
new ByteArrayOutputStream(contentLength >= 0 ? (int) contentLength : StreamUtils.BUFFER_SIZE);
StreamUtils.copy(inputMessage.getBody(), bos);
return bos.toByteArray();
}
@Override
protected Long getContentLength(byte[] bytes, @Nullable MediaType contentType) {
return (long) bytes.length;
}
@Override
protected void writeInternal(byte[] bytes, HttpOutputMessage outputMessage) throws IOException {
StreamUtils.copy(bytes, outputMessage.getBody());
}
}