package net.sourceforge.fenixedu.presentationTier.Action;

import java.io.IOException;
import java.io.InputStream;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sourceforge.fenixedu.presentationTier.Action.base.FenixDispatchAction;
import net.sourceforge.fenixedu.util.StreamUtils;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import pt.ist.fenixWebFramework.struts.annotations.Mapping;
import pt.ist.fenixframework.plugins.fileSupport.domain.GenericFile;

@Mapping(path = "/fileDownload")
public class FileDownloadAction extends FenixDispatchAction {
    public ActionForward download(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) throws IOException {
	ServletOutputStream outputStream = null;
	GenericFile file = getDomainObject(request, "fileId");
	InputStream stream = file.getStream();
	try {
	    outputStream = response.getOutputStream();
	    response.setContentType(file.getContentType());
	    response.setHeader("Content-disposition", "attachment; filename=\"" + file.getFilename() + "\"");
	    int byteCount = StreamUtils.copyStream(stream, outputStream);
	    response.setContentLength(byteCount);
	    outputStream.flush();
	} finally {
	    outputStream.close();
	    stream.close();

	}
	return null;
    }
}