net.duckling.ddl.service.share.impl.ShareFileAccessServiceImpl.java Source code

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Here is the source code for net.duckling.ddl.service.share.impl.ShareFileAccessServiceImpl.java

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/*
 * Copyright (c) 2008-2016 Computer Network Information Center (CNIC), Chinese Academy of Sciences.
 * 
 * This file is part of Duckling project.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 *
 */

package net.duckling.ddl.service.share.impl;

import java.util.Calendar;
import java.util.Date;

import net.duckling.ddl.service.share.ShareFileAccess;
import net.duckling.ddl.service.share.ShareFileAccessService;
import net.duckling.ddl.util.AoneTimeUtils;
import net.duckling.ddl.util.EncodeUtil;

import org.apache.commons.codec.binary.Base64;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @date 2011-10-10
 * @author clive
 */
@Service
public class ShareFileAccessServiceImpl implements ShareFileAccessService {

    private static final int UID_LEN = 4;
    private static final int PSW_LEN = 3;

    @Autowired
    private ShareFileAccessDAOImpl shareFileAccessDao;

    @Override
    public String getRestOfVaildDays(ShareFileAccess s) {
        Calendar c = Calendar.getInstance();
        c.setTime(s.getCreateTime());
        c.add(Calendar.DATE, s.getValidOfDays());
        Date now = new Date();
        return AoneTimeUtils.getLastTime(c.getTimeInMillis() - now.getTime());
    }

    @Override
    public boolean isValidRequest(ShareFileAccess instance) {
        Calendar c = Calendar.getInstance();
        c.setTime(instance.getCreateTime());
        c.add(Calendar.DATE, instance.getValidOfDays());
        return c.getTime().after(new Date());
    }

    @Override
    public String getPublicFileURL(int tid, int clbId, int fid, int validOfDays, String fileOwner) {
        ShareFileAccess s = new ShareFileAccess();
        s.setTid(tid);
        s.setClbId(clbId);
        s.setFid(fid);
        s.setRid(fid);
        s.setUid(fileOwner);
        s.setValidOfDays(validOfDays);
        s.setPassword(getRandomPassword());
        persistentShareFileAccess(s);
        return getEncodeURL(s);
    }

    @Override
    public String getPublicFileURL(ShareFileAccess s) {
        s.setPassword(getRandomPassword());
        persistentShareFileAccess(s);
        return getEncodeURL(s);
    }

    @Override
    public ShareFileAccess parseShareAccess(String encodeURL) {
        byte[] bytes = Base64.decodeBase64(encodeURL.getBytes());
        StringBuilder rawStrBuilder = new StringBuilder();
        for (int i = 0; i < bytes.length; i++) {
            rawStrBuilder.append((char) bytes[i]);
        }
        String[] strArray = rawStrBuilder.toString().split("#");
        ShareFileAccess current = wrapShareFileAccess(strArray);
        ShareFileAccess persistence = shareFileAccessDao.find(current);
        if (isOldPassword(current.getPassword()) && persistence == null) {
            return persistentShareFileAccess(current);
        }
        return isValidPassword(current.getPassword(), persistence) ? persistence : null;
    }

    private ShareFileAccess wrapShareFileAccess(String[] array) {
        ShareFileAccess s = new ShareFileAccess();
        s.setTid(Integer.parseInt(array[0]));
        s.setClbId(Integer.parseInt(array[1]));
        s.setFid(Integer.parseInt(array[2]));
        s.setPassword(array[PSW_LEN]);
        s.setUid(array[UID_LEN]);
        return s;
    }

    private boolean isOldPassword(String password) {
        return password.equals(OLD_VALID_PASSWORD);
    }

    private boolean isValidPassword(String password, ShareFileAccess record) {
        return password.equals(OLD_VALID_PASSWORD) || password.equals(record.getPassword());
    }

    private ShareFileAccess persistentShareFileAccess(ShareFileAccess s) {
        s.setCreateTime(new Date());
        int id = shareFileAccessDao.insertRecord(s);
        s.setId(id);
        return s;
    }

    private String getEncodeURL(ShareFileAccess s) {
        String tempStr = s.getTid() + "#" + s.getClbId() + "#" + s.getRid() + "#" + s.getPassword() + "#"
                + s.getUid() + "#rid";
        byte[] tempBytes = Base64.encodeBase64(tempStr.getBytes());
        return new String(tempBytes);
    }

    private String getRandomPassword() {
        return EncodeUtil.generateEncode();
    }
}