package com.ruoyi.gateway.filter;
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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.http.HttpHeaders;
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import org.springframework.http.HttpMethod;
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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.ruoyi.common.core.constant.CacheConstants;
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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.constant.TokenConstants;
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import com.ruoyi.common.core.utils.JwtUtils;
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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 io.jsonwebtoken.Claims;
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import reactor.core.publisher.Mono;
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import java.util.HashMap;
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import java.util.Map;
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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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private static final Logger log = LoggerFactory.getLogger(AuthFilter.class);
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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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@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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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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return chain.filter(exchange);
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}
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//防抖校验
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try {
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antiShake(request);
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}catch (Exception e){
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log.error("[重复提交]请求路径:{}", exchange.getRequest().getPath());
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return ServletUtils.webFluxResponseWriter(exchange.getResponse(), e.getMessage(), HttpStatus.SUCCESS);
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}
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//校验账户是否有效
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try {
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verifyToken(request);
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}catch (Exception e){
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return unauthorizedResponse(exchange, e.getMessage());
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}
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String token = getToken(request);
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Claims claims = JwtUtils.parseToken(token);
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String userkey = JwtUtils.getUserKey(claims);
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String userid = JwtUtils.getUserId(claims);
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String username = JwtUtils.getUserName(claims);
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// 设置用户信息到请求
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addHeader(mutate, SecurityConstants.USER_KEY, userkey);
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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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if (value == null) {
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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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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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log.error("[鉴权异常处理]请求路径:{}", exchange.getRequest().getPath() + "\n" + msg);
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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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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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String token = request.getHeaders().getFirst(TokenConstants.AUTHENTICATION);
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// 如果前端设置了令牌前缀，则裁剪掉前缀
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if (StringUtils.isNotEmpty(token) && token.startsWith(TokenConstants.PREFIX)) {
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token = token.replaceFirst(TokenConstants.PREFIX, StringUtils.EMPTY);
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}
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return token;
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}
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/**
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* 防抖处理
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*/
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public void antiShake(ServerHttpRequest request) throws Exception{
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HttpMethod method = request.getMethod();
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if(HttpMethod.OPTIONS == method){
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return;
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}
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HttpHeaders headers = request.getHeaders();
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String client = headers.getFirst("client");
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String timestamp = headers.getFirst("timestamp");
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if(StringUtils.isEmpty(client)){
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throw new RuntimeException("参数异常");
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}
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if(StringUtils.isEmpty(timestamp)){
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throw new RuntimeException("参数异常");
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}
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String url = request.getURI().getPath();
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Map<String, Object> cacheMap = redisService.getCacheMap(client);
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if(null == cacheMap){
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cacheMap = new HashMap<>();
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cacheMap.put(url, timestamp);
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redisService.setCacheMap(client, cacheMap, 5L);
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}else{
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Object o = cacheMap.get(url);
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if(null == o){
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cacheMap.put(url, timestamp);
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}else{
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Long old_timestamp = Long.valueOf(o.toString());
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Long new_timestamp = Long.valueOf(timestamp);
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//两个请求时间差小于1秒，判定为重复提交
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if((new_timestamp - old_timestamp) <= 1000){
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throw new RuntimeException("重复提交");
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}else{
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cacheMap.put(url, timestamp);
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}
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}
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redisService.setCacheMap(client, cacheMap, 5L);
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}
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}
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/**
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* 验证token
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* @param request
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* @throws Exception
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*/
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public void verifyToken(ServerHttpRequest request) throws Exception{
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String token = getToken(request);
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if (StringUtils.isEmpty(token)) {
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throw new RuntimeException("令牌不能为空");
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}
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Claims claims = JwtUtils.parseToken(token);
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if (claims == null) {
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throw new RuntimeException("令牌已过期或验证不正确！");
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}
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String userid = JwtUtils.getUserId(claims);
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if (StringUtils.isEmpty(userid)) {
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throw new RuntimeException("令牌验证失败");
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}
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}
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@Override
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public int getOrder() {
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return -300;
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}
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}
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