package com.gkhy.safePlatform.config.security;
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import com.alibaba.fastjson.JSONArray;
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import com.alibaba.fastjson.JSONObject;
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import com.gkhy.safePlatform.account.rpc.apimodel.AccountAuthService;
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import com.gkhy.safePlatform.account.rpc.apimodel.AccountAuthService;
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import com.gkhy.safePlatform.commons.co.ContextCacheAuthority;
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import com.gkhy.safePlatform.commons.co.ContextCacheUser;
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import com.gkhy.safePlatform.commons.enums.RedisKeyEnum;
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import com.gkhy.safePlatform.commons.enums.ResultCodes;
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import com.gkhy.safePlatform.commons.exception.BusinessException;
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import com.gkhy.safePlatform.commons.utils.RPCUtils;
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import com.gkhy.safePlatform.commons.utils.RequestContextHolder;
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import com.gkhy.safePlatform.commons.utils.StringUtils;
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import com.gkhy.safePlatform.commons.vo.ResultVO;
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import com.gkhy.safePlatform.config.redis.RedisUtils;
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import org.apache.dubbo.config.annotation.DubboReference;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
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import org.springframework.security.core.GrantedAuthority;
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import org.springframework.security.core.authority.SimpleGrantedAuthority;
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import org.springframework.security.core.context.SecurityContextHolder;
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import org.springframework.stereotype.Component;
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import org.springframework.web.filter.OncePerRequestFilter;
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import javax.servlet.FilterChain;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/**
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* @Description: token登录过滤器
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*/
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@Component
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public class TokenAuthenticationFilter extends OncePerRequestFilter {
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@Autowired
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private TokenConfig tokenConfig;
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@DubboReference(check = false)
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private AccountAuthService userAccountService;
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@Autowired
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private RedisUtils redisUtils;
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@Override
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protected void doFilterInternal(HttpServletRequest req, HttpServletResponse resp, FilterChain chain) throws IOException, ServletException {
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try {
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//获取当前认证成功用户权限信息
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UsernamePasswordAuthenticationToken authRequest = getAuthentication(req, resp);
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if (authRequest != null) {
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SecurityContextHolder.getContext().setAuthentication(authRequest);
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}
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// 执行下一个 filter 过滤器链
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chain.doFilter(req, resp);
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} catch (BusinessException e) {
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// 返回异常
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this.writeJSON(req, resp, new ResultVO<>(e.getCode(),e.getMessage()));
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}
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}
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private UsernamePasswordAuthenticationToken getAuthentication(HttpServletRequest req,HttpServletResponse resp) {
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// header获取token
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String authToken = req.getHeader(tokenConfig.getHeader());
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if(authToken != null) {
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// 登录成功时，会将权限数据存入redis
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// 这里是验证获取权限信息
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// 1.从redis中获取对应该用户的权限信息
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String accessTokenKey = RedisKeyEnum.authKey(RedisKeyEnum.AUTH_TOKEN, authToken);
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Object o = redisUtils.get(accessTokenKey);
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// 2.token是否存在
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if (o == null) {
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// 是否存在 uid未登录
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throw new BusinessException(ResultCodes.CLIENT_CREDENTIALS_TOKEN_INVALID);
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}else{
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// todo 可以不转换，建议rpc传入string
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String uid = o.toString();
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Long userId = Long.valueOf(uid);
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String accessUserKey = RedisKeyEnum.authKey(RedisKeyEnum.AUTH_USER, userId);
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// 这里不做用户信息的token判断 放入登录
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Long expireSecondsLeft = redisUtils.getExpireTime(accessTokenKey);
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// 60m 内请求则续期 时长为原本的有效时间
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if (expireSecondsLeft != null && 0L < expireSecondsLeft && expireSecondsLeft < 60 * 60) {
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// 重置token:uid
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redisUtils.resetKeyExpireTime(accessTokenKey, tokenConfig.getExpiration());
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// 重置uid:userInfo
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redisUtils.resetKeyExpireTime(accessUserKey, tokenConfig.getExpiration());
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}
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// 获取用户信息
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Object oo = redisUtils.get(accessUserKey);
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// 初始化
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ContextCacheUser contextCacheUser = null;
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if (oo == null) {
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// 业务逻辑上是不会空的
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// 实际操作可能会手动清空
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ResultVO<ContextCacheUser> rpcResultVo = userAccountService.getCacheUserDetailByUid(userId);
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// 调用rpc返回的数据 没有token 所以得至少续上这次token
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contextCacheUser = this.getRpcResult(rpcResultVo);
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// 因为手动清空等原因，可能会丢失其他token数据，就不去一一搜索这个uid的token了
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contextCacheUser.setAccessToken(Collections.singletonList(authToken));
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}else{
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// 正常的实际场景必定会走这里
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// 推荐用jackson
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contextCacheUser = JSONObject.parseObject(oo.toString(), ContextCacheUser.class);
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}
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// threadLocal存入用户信息
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RequestContextHolder.contextUserLocal.set(contextCacheUser);
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// security对象中存入登陆者信息
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return new UsernamePasswordAuthenticationToken(contextCacheUser, authToken, contextCacheUser.getAuthorities());
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}
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}
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return null;
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}
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/**
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* 获取rpc 返回的用户数据
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*
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* @param rpcResultVo rpc返回数据
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* @return 用户准备缓存的数据
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*/
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private ContextCacheUser getRpcResult(ResultVO<ContextCacheUser> rpcResultVo) {
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if (!rpcResultVo.getCode().equals(ResultCodes.OK.getCode())) {
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throw new BusinessException(rpcResultVo.getCode(), rpcResultVo.getMsg());
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}
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if (rpcResultVo.getData() == null) {
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throw new BusinessException(ResultCodes.RPC_DATA_NULL);
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}
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if (rpcResultVo.getData() instanceof ContextCacheUser) {
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return (ContextCacheUser) rpcResultVo.getData();
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} else {
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throw new BusinessException(ResultCodes.RPC_DATA_TYPE_NOT_MATCH);
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}
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}
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protected void writeJSON(HttpServletRequest req,
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HttpServletResponse resp,
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ResultVO resultVO) throws IOException {
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// 设置编码格式
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resp.setContentType("text/json;charset=utf-8");
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// 处理跨域问题
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resp.setHeader("Access-Control-Allow-Origin", "*");
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resp.setHeader("Access-Control-Allow-Methods", "POST, GET");
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//输出JSON
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PrintWriter out = resp.getWriter();
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out.write(JSONObject.toJSONString(resultVO));
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out.flush();
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out.close();
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}
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}
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