/*
* Copyright (c) 2002-2012 Alibaba Group Holding Limited.
* All rights reserved.
*
* 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 com.alibaba.citrus.service.upload.impl.cfu;
import javax.servlet.http.HttpServletRequest;
/**
* 继承自commons-fileupload-1.2.1的同名类，改进了如下内容：
* <ul>
* <li>假如<code>request.getCharacterEncoding()</code>返回<code>null</code> ，那么返回默认值
* <code>ISO-8859-1</code>。该方法将被用来解析header，其中包括field name，file name等。原始类在
* <code>request.getCharacterEncoding()</code>返回<code>null</code>
* 时，将使用操作系统默认编码，这样将返回不确定的结果。经过修改后，就和servlet规范相一致。</li>
* </ul>
*
* @author Michael Zhou
*/
public class ServletRequestContext extends org.apache.commons.fileupload.servlet.ServletRequestContext {
public static final String DEFAULT_CHARSET = "ISO-8859-1";
public ServletRequestContext(HttpServletRequest request) {
super(request);
}
@Override
public String getCharacterEncoding() {
String charset = super.getCharacterEncoding();
if (charset == null) {
charset = DEFAULT_CHARSET;
}
return charset;
}
}