001// Copyright 2007, 2008 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.upload.internal.services;
016
017import org.apache.commons.fileupload.servlet.ServletFileUpload;
018import org.apache.tapestry5.http.services.HttpServletRequestFilter;
019import org.apache.tapestry5.http.services.HttpServletRequestHandler;
020import org.apache.tapestry5.upload.services.MultipartDecoder;
021
022import javax.servlet.http.HttpServletRequest;
023import javax.servlet.http.HttpServletResponse;
024import java.io.IOException;
025
026/**
027 * Filter that decodes an incoming multipart request.
028 */
029public class MultipartServletRequestFilter implements HttpServletRequestFilter
030{
031    private final MultipartDecoder decoder;
032
033    public MultipartServletRequestFilter(MultipartDecoder multipartDecoder)
034    {
035        decoder = multipartDecoder;
036    }
037
038    @Override
039    public boolean service(HttpServletRequest request, HttpServletResponse response, HttpServletRequestHandler handler)
040            throws IOException
041    {
042        HttpServletRequest newRequest = ServletFileUpload.isMultipartContent(request) ? decoder.decode(
043                request) : request;
044
045        return handler.service(newRequest, response);
046    }
047
048}