package doumeemes.config.shiro;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.commons.lang.SerializationUtils;
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import org.apache.shiro.session.Session;
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import org.apache.shiro.session.UnknownSessionException;
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import org.apache.shiro.session.mgt.SimpleSession;
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import org.apache.shiro.session.mgt.eis.SessionDAO;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.data.redis.core.RedisTemplate;
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import org.springframework.data.redis.core.StringRedisTemplate;
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import java.io.Serializable;
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import java.util.Collection;
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import java.util.concurrent.TimeUnit;
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//@Component
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@Slf4j
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@SuppressWarnings({ "rawtypes", "unchecked" })
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public class ShiroRedisSessionDAO implements SessionDAO {
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// Session超时时间，单位为毫秒
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private static final String KEY_PREFIX = "shiro:session:";
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private long expireTime = 120000;
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@Autowired
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private ShiroTokenManager shiroTokenManager;
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@Autowired
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private RedisTemplate redisTemplate;// Redis操作类，对这个使用不熟悉的，可以参考前面的博客
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public ShiroRedisSessionDAO() {
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super();
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}
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public ShiroRedisSessionDAO(long expireTime, StringRedisTemplate redisTemplate) {
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super();
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this.expireTime = expireTime;
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this.redisTemplate = redisTemplate;
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}
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@Override // 更新session
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public void update(Session session) throws UnknownSessionException {
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System.out.println("===============update================");
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if (session == null || session.getId() == null) {
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return;
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}
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session.setTimeout(expireTime);
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byte[] bytes = SerializationUtils.serialize((Serializable) session);
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redisTemplate.opsForValue().set(KEY_PREFIX+session.getId(), bytes, expireTime, TimeUnit.MILLISECONDS);
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}
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@Override // 删除session
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public void delete(Session session) {
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System.out.println("===============delete================");
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if (null == session) {
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return;
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}
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redisTemplate.opsForValue().getOperations().delete(KEY_PREFIX+session.getId());
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}
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@Override// 获取活跃的session，可以用来统计在线人数，如果要实现这个功能，可以在将session加入redis时指定一个session前缀，统计的时候则使用keys("session-prefix*")的方式来模糊查找redis中所有的session集合
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public Collection getActiveSessions() {
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System.out.println("==============getActiveSessions=================");
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return redisTemplate.keys("*");
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}
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@Override
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public Serializable create(Session session) {
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System.out.println("===============doCreate================");
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if (session == null) {
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log.error("session is null");
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throw new UnknownSessionException("session is null");
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}
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Serializable sessionId = shiroTokenManager.build();
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((SimpleSession)session).setId(sessionId);
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byte[] bytes = SerializationUtils.serialize((Serializable) session);
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redisTemplate.opsForValue().set(session.getId(), bytes, expireTime, TimeUnit.MILLISECONDS);
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return sessionId;
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}
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public Session readSession(Serializable sessionId) throws UnknownSessionException{
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if (sessionId == null) {
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log.warn("session id is null");
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return null;
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}
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if (sessionId instanceof String) {
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// 对SessionId进行验证（可用于防止Session捕获、暴力捕捉等一系列安全问题，最终安全性取决于check如何实现）
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shiroTokenManager.check((String) sessionId);
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}
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log.debug("read session from cache");
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SimpleSession simpleSession = (SimpleSession) SerializationUtils.deserialize((byte[])redisTemplate.opsForValue().get(KEY_PREFIX+sessionId));
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return simpleSession;
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}
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public long getExpireTime() {
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return expireTime;
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}
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public void setExpireTime(long expireTime) {
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this.expireTime = expireTime;
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}
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public RedisTemplate getRedisTemplate() {
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return redisTemplate;
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}
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public void setRedisTemplate(RedisTemplate redisTemplate) {
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this.redisTemplate = redisTemplate;
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}
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}
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