package com.ruoyi.gateway.filter;
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import javax.annotation.Resource;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.cloud.gateway.filter.GatewayFilterChain;
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import org.springframework.cloud.gateway.filter.GlobalFilter;
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import org.springframework.core.Ordered;
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import org.springframework.data.redis.core.ValueOperations;
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import org.springframework.http.server.reactive.ServerHttpRequest;
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import org.springframework.stereotype.Component;
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import org.springframework.web.server.ServerWebExchange;
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import com.alibaba.fastjson.JSONObject;
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import com.ruoyi.common.core.constant.CacheConstants;
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import com.ruoyi.common.core.constant.Constants;
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import com.ruoyi.common.core.constant.HttpStatus;
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import com.ruoyi.common.core.constant.SecurityConstants;
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import com.ruoyi.common.core.utils.SecurityUtils;
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import com.ruoyi.common.core.utils.ServletUtils;
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import com.ruoyi.common.core.utils.StringUtils;
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import com.ruoyi.common.redis.service.RedisService;
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import com.ruoyi.gateway.config.properties.IgnoreWhiteProperties;
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import reactor.core.publisher.Mono;
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/**
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* 网关鉴权
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*
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* @author ruoyi
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*/
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@Component
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public class AuthFilter implements GlobalFilter, Ordered
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{
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private static final Logger log = LoggerFactory.getLogger(AuthFilter.class);
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private final static long EXPIRE_TIME = Constants.TOKEN_EXPIRE * 60;
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// 排除过滤的 uri 地址，nacos自行添加
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@Autowired
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private IgnoreWhiteProperties ignoreWhite;
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@Resource(name = "stringRedisTemplate")
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private ValueOperations<String, String> sops;
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@Autowired
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private RedisService redisService;
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@Override
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public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain)
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{
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ServerHttpRequest request = exchange.getRequest();
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ServerHttpRequest.Builder mutate = request.mutate();
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String url = request.getURI().getPath();
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// 跳过不需要验证的路径
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if (StringUtils.matches(url, ignoreWhite.getWhites()))
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{
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return chain.filter(exchange);
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}
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String token = getToken(request);
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if (StringUtils.isEmpty(token))
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{
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return unauthorizedResponse(exchange, "令牌不能为空");
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}
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String userStr = sops.get(getTokenKey(token));
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if (StringUtils.isEmpty(userStr))
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{
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return unauthorizedResponse(exchange, "登录状态已过期");
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}
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JSONObject cacheObj = JSONObject.parseObject(userStr);
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String userid = cacheObj.getString("userid");
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String username = cacheObj.getString("username");
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if (StringUtils.isEmpty(userid) || StringUtils.isEmpty(username))
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{
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return unauthorizedResponse(exchange, "令牌验证失败");
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}
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// 设置过期时间
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redisService.expire(getTokenKey(token), EXPIRE_TIME);
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// 设置用户信息到请求
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addHeader(mutate, SecurityConstants.DETAILS_USER_ID, userid);
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addHeader(mutate, SecurityConstants.DETAILS_USERNAME, username);
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// 内部请求来源参数清除
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removeHeader(mutate, SecurityConstants.FROM_SOURCE);
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return chain.filter(exchange.mutate().request(mutate.build()).build());
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}
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private void addHeader(ServerHttpRequest.Builder mutate, String name, Object value)
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{
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if (value == null)
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{
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return;
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}
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String valueStr = value.toString();
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String valueEncode = ServletUtils.urlEncode(valueStr);
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mutate.header(name, valueEncode);
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}
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private void removeHeader(ServerHttpRequest.Builder mutate, String name)
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{
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mutate.headers(httpHeaders -> httpHeaders.remove(name)).build();
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}
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private Mono<Void> unauthorizedResponse(ServerWebExchange exchange, String msg)
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{
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log.error("[鉴权异常处理]请求路径:{}", exchange.getRequest().getPath());
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return ServletUtils.webFluxResponseWriter(exchange.getResponse(), msg, HttpStatus.UNAUTHORIZED);
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}
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/**
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* 获取缓存key
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*/
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private String getTokenKey(String token)
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{
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return CacheConstants.LOGIN_TOKEN_KEY + token;
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}
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/**
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* 获取请求token
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*/
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private String getToken(ServerHttpRequest request)
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{
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String token = request.getHeaders().getFirst(SecurityConstants.TOKEN_AUTHENTICATION);
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return SecurityUtils.replaceTokenPrefix(token);
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}
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@Override
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public int getOrder()
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{
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return -200;
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}
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}
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