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    
015    package org.apache.tapestry5.upload.internal.services;
016    
017    import org.apache.commons.fileupload.servlet.ServletFileUpload;
018    import org.apache.tapestry5.services.HttpServletRequestFilter;
019    import org.apache.tapestry5.services.HttpServletRequestHandler;
020    import org.apache.tapestry5.upload.services.MultipartDecoder;
021    
022    import javax.servlet.http.HttpServletRequest;
023    import javax.servlet.http.HttpServletResponse;
024    import java.io.IOException;
025    
026    /**
027     * Filter that decodes an incoming multipart request.
028     */
029    public class MultipartServletRequestFilter implements HttpServletRequestFilter
030    {
031        private final MultipartDecoder decoder;
032    
033        public MultipartServletRequestFilter(MultipartDecoder multipartDecoder)
034        {
035            decoder = multipartDecoder;
036        }
037    
038        public boolean service(HttpServletRequest request, HttpServletResponse response, HttpServletRequestHandler handler)
039                throws IOException
040        {
041            HttpServletRequest newRequest = ServletFileUpload.isMultipartContent(request) ? decoder.decode(
042                    request) : request;
043    
044            return handler.service(newRequest, response);
045        }
046    
047    }