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package cn.wisenergy.web.shiro;
import cn.wisenergy.common.enums.RespCodeEnum;
import cn.wisenergy.model.app.User;
import cn.wisenergy.web.config.JwtConfig;
import com.alibaba.fastjson.JSON;
import io.jsonwebtoken.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.shiro.authc.IncorrectCredentialsException;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
/**
* Jwt-Token工具类
*
* @author lut
*/
@Slf4j
@Component
@EnableConfigurationProperties(JwtConfig.class)
public class JwtUtil {
@Autowired
JwtConfig jwtConfig;
/**
* 生成Jwt令牌
*
* @param jSubject
* @return
*/
private String createJWT(String jSubject) {
log.info("构建Jwt令牌-->{}", jSubject);
return Jwts.builder()
.signWith(SignatureAlgorithm.HS512, jwtConfig.getSecret())
.setSubject(jSubject)
.setIssuedAt(DateTime.now().toDate())
//.setExpiration(DateTime.now().plusSeconds(jwtConfig.getExpire() * 2).toDate())
.compact();
}
/**
* 解析令牌数据
*
* @param token
* @return
*/
public Claims getClaimsFromToken(String token) {
Claims claims;
try {
claims = Jwts.parser()
.setSigningKey(jwtConfig.getSecret())
.parseClaimsJws(token)
.getBody();
} catch (ExpiredJwtException e) {
throw new IncorrectCredentialsException(RespCodeEnum.TOKEN_IS_NOT_TIMEOUT.getMsg());
} catch (MalformedJwtException | SignatureException e) {
log.error("JWT解析异常，ex={}", e.getMessage(), e);
throw new IncorrectCredentialsException(RespCodeEnum.TOKEN_IS_NOT_ERROR.getMsg());
}
return claims;
}
/**
* 生成Jwt令牌
*
* @param userDetails 用户信息
* @return
*/
public String generateToken(User userDetails) {
return createJWT(JSON.toJSONString(userDetails));
}
/**
* 从令牌中获取用户信息
*
* @return
*/
public User getUserFromToken(Claims claims) {
return JSON.parseObject(claims.getSubject(), User.class);
}
/**
* 判断令牌是否过期
*
* @param claims
* @return 是否过期
*/
public Boolean isTokenExpired(Claims claims) {
return claims.getExpiration().before(DateTime.now().plusSeconds(jwtConfig.getExpire()).toDate());
}
/**
* 从请求头中获取token
*
* @return
*/
public String getToken() {
HttpServletRequest request = ((ServletRequestAttributes) (RequestContextHolder.currentRequestAttributes())).getRequest();
return request.getHeader("Authorization");
}
}