/*
* Copyright 2002-2016 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
*
* 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.
*/
package org.springframework.integration.http.multipart;
import java.io.IOException;
import java.nio.charset.Charset;
import org.springframework.http.MediaType;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.util.WebUtils;
/**
* {@link MultipartFileReader} implementation that does not maintain metadata from
* the original {@link MultipartFile} instance. Instead this simply reads the file
* content directly as either a String or byte array depending on the Content-Type.
*
* @author Mark Fisher
* @since 2.0
*/
public class SimpleMultipartFileReader implements MultipartFileReader<Object> {
private volatile Charset defaultCharset = Charset.forName(WebUtils.DEFAULT_CHARACTER_ENCODING);
/**
* Specify the default charset name to use when converting multipart file
* content into Strings if the multipart itself does not provide a charset.
*
* @param defaultCharset The default charset.
*/
public void setDefaultMultipartCharset(String defaultCharset) {
this.defaultCharset = Charset.forName(
defaultCharset != null ? defaultCharset : WebUtils.DEFAULT_CHARACTER_ENCODING);
}
@Override
public Object readMultipartFile(MultipartFile multipartFile) throws IOException {
if (multipartFile.getContentType() != null && multipartFile.getContentType().startsWith("text")) {
MediaType contentType = MediaType.parseMediaType(multipartFile.getContentType());
Charset charset = contentType.getCharset();
if (charset == null) {
charset = this.defaultCharset;
}
return new String(multipartFile.getBytes(), charset.name());
}
else {
return multipartFile.getBytes();
}
}
}