001/*
002 * (C) Copyright 2006-2016 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Thierry Delprat
018 *     Florent Guillaume
019 *     Estelle Giuly <egiuly@nuxeo.com>
020 */
021package org.nuxeo.ecm.platform.ui.web.download;
022
023import java.io.File;
024import java.io.IOException;
025import java.net.URI;
026import java.net.URISyntaxException;
027
028import javax.servlet.http.HttpServlet;
029import javax.servlet.http.HttpServletRequest;
030import javax.servlet.http.HttpServletResponse;
031
032import org.nuxeo.common.Environment;
033import org.nuxeo.ecm.core.api.Blob;
034import org.nuxeo.ecm.core.api.Blobs;
035import org.nuxeo.ecm.core.io.download.DownloadHelper;
036import org.nuxeo.ecm.core.io.download.DownloadService;
037import org.nuxeo.ecm.core.io.download.DownloadService.DownloadContext;
038import org.nuxeo.ecm.platform.web.common.vh.VirtualHostHelper;
039import org.nuxeo.runtime.api.Framework;
040
041/**
042 * Simple download servlet used for big files that can not be downloaded from within the JSF context (because of
043 * buffered ResponseWrapper).
044 */
045public class DownloadServlet extends HttpServlet {
046
047    private static final long serialVersionUID = 1L;
048
049    /** @deprecated since 7.4, use nxfile instead */
050    @Deprecated
051    public static final String NXBIGFILE = DownloadService.NXBIGFILE;
052
053    @Override
054    public void doHead(HttpServletRequest req, HttpServletResponse resp) throws IOException {
055        doGet(req, resp); // downstream methods will deal with HEAD and avoid sending a body
056    }
057
058    @Override
059    public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
060        try {
061            handleDownload(req, resp);
062        } catch (IOException ioe) {
063            DownloadHelper.handleClientDisconnect(ioe);
064        }
065    }
066
067    protected void handleDownload(HttpServletRequest req, HttpServletResponse resp) throws IOException {
068        String requestURI;
069        try {
070            requestURI = new URI(req.getRequestURI()).getPath();
071        } catch (URISyntaxException e) {
072            requestURI = req.getRequestURI();
073        }
074        // remove context
075        String context = VirtualHostHelper.getContextPath(req) + "/";
076        if (!requestURI.startsWith(context)) {
077            resp.sendError(HttpServletResponse.SC_NOT_FOUND, "Invalid URL syntax");
078            return;
079        }
080        String baseUrl = VirtualHostHelper.getBaseURL(req);
081        String path = requestURI.substring(context.length());
082        DownloadService downloadService = Framework.getService(DownloadService.class);
083        downloadService.handleDownload(req, resp, baseUrl, path);
084    }
085
086    /**
087     * @deprecated since 9.1. It was defined for ClipboardActionsBean but it seems not to be used anymore.
088     */
089    @Deprecated
090    protected void handleDownloadTemporaryZip(HttpServletRequest req, HttpServletResponse resp, String filePath)
091            throws IOException {
092        String[] pathParts = filePath.split("/");
093        String tmpFileName = pathParts[0];
094        File tmpZip = new File(Environment.getDefault().getTemp(), tmpFileName);
095        try {
096            Blob zipBlob = Blobs.createBlob(tmpZip);
097            DownloadContext context = DownloadContext.builder(req, resp)
098                                                     .blob(zipBlob)
099                                                     .filename("clipboard.zip")
100                                                     .reason("clipboardZip")
101                                                     .build();
102            Framework.getService(DownloadService.class).downloadBlob(context);
103        } finally {
104            tmpZip.delete();
105        }
106    }
107
108}