/*
 * Copyright 2002-2011 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.web.multipart;

import javax.servlet.http.HttpServletRequest;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.lang.Nullable;

Provides additional methods for dealing with multipart content within a servlet request, allowing to access uploaded files. Implementations also need to override the standard ServletRequest methods for parameter access, making multipart parameters available. 
A concrete implementation is DefaultMultipartHttpServletRequest. As an intermediate step, AbstractMultipartHttpServletRequest can be subclassed. 
Author:
Juergen Hoeller, Trevor D. Cook
See Also:
MultipartResolver
MultipartFile
ServletRequest.getParameter
ServletRequest.getParameterNames
ServletRequest.getParameterMap
DefaultMultipartHttpServletRequest
AbstractMultipartHttpServletRequest
Since:
29.09.2003/**
 * Provides additional methods for dealing with multipart content within a
 * servlet request, allowing to access uploaded files.
 * Implementations also need to override the standard
 * {@link javax.servlet.ServletRequest} methods for parameter access, making
 * multipart parameters available.
 *
 * <p>A concrete implementation is
 * {@link org.springframework.web.multipart.support.DefaultMultipartHttpServletRequest}.
 * As an intermediate step,
 * {@link org.springframework.web.multipart.support.AbstractMultipartHttpServletRequest}
 * can be subclassed.
 *
 * @author Juergen Hoeller
 * @author Trevor D. Cook
 * @since 29.09.2003
 * @see MultipartResolver
 * @see MultipartFile
 * @see javax.servlet.http.HttpServletRequest#getParameter
 * @see javax.servlet.http.HttpServletRequest#getParameterNames
 * @see javax.servlet.http.HttpServletRequest#getParameterMap
 * @see org.springframework.web.multipart.support.DefaultMultipartHttpServletRequest
 * @see org.springframework.web.multipart.support.AbstractMultipartHttpServletRequest
 */
public interface MultipartHttpServletRequest extends HttpServletRequest, MultipartRequest {

	
Return this request's method as a convenient HttpMethod instance.
/**
	 * Return this request's method as a convenient HttpMethod instance.
	 */
	@Nullable
	HttpMethod getRequestMethod();

	
Return this request's headers as a convenient HttpHeaders instance.
/**
	 * Return this request's headers as a convenient HttpHeaders instance.
	 */
	HttpHeaders getRequestHeaders();

	
Return the headers associated with the specified part of the multipart request.
If the underlying implementation supports access to headers, then all headers are returned.
Otherwise, the returned headers will include a 'Content-Type' header at the very least.
/**
	 * Return the headers associated with the specified part of the multipart request.
	 * <p>If the underlying implementation supports access to headers, then all headers are returned.
	 * Otherwise, the returned headers will include a 'Content-Type' header at the very least.
	 */
	@Nullable
	HttpHeaders getMultipartHeaders(String paramOrFileName);

}