001// Copyright 2007, 2008, 2009, 2010 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.internal.services;
016
017import java.io.BufferedInputStream;
018import java.io.IOException;
019import java.io.InputStream;
020import java.io.OutputStream;
021
022import org.apache.tapestry5.StreamResponse;
023import org.apache.tapestry5.http.services.Response;
024import org.apache.tapestry5.internal.TapestryInternalUtils;
025import org.apache.tapestry5.ioc.internal.util.InternalUtils;
026import org.apache.tapestry5.services.ComponentEventResultProcessor;
027
028public class StreamResponseResultProcessor implements ComponentEventResultProcessor<StreamResponse>
029{
030    private final Response response;
031
032    public StreamResponseResultProcessor(Response response)
033    {
034        this.response = response;
035    }
036
037    public void processResultValue(StreamResponse streamResponse) throws IOException
038    {
039        OutputStream os = null;
040        InputStream is = null;
041
042        // The whole point is that the response is in the hands of the StreamResponse;
043        // if they want to compress the result, they can add their own GZIPOutputStream to
044        // their pipeline.
045
046        response.disableCompression();
047
048        streamResponse.prepareResponse(response);
049
050        try
051        {
052            is = new BufferedInputStream(streamResponse.getStream());
053
054            os = response.getOutputStream(streamResponse.getContentType());
055
056            TapestryInternalUtils.copy(is, os);
057
058            os.close();
059            os = null;
060
061            is.close();
062            is = null;
063        }
064        finally
065        {
066            InternalUtils.close(is);
067            InternalUtils.close(os);
068        }
069    }
070}