package com.genersoft.iot.vmp.conf.security;
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import com.genersoft.iot.vmp.conf.UserSetting;
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import com.genersoft.iot.vmp.conf.security.dto.JwtUser;
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import org.apache.commons.lang3.StringUtils;
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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.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.util.ArrayList;
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/**
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* jwt token 过滤器
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*/
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@Component
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public class JwtAuthenticationFilter extends OncePerRequestFilter {
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@Autowired
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private UserSetting userSetting;
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@Override
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protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
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// 忽略登录请求的token验证
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String requestURI = request.getRequestURI();
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if (requestURI.equalsIgnoreCase("/api/user/login")) {
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chain.doFilter(request, response);
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return;
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}
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if (!userSetting.isInterfaceAuthentication()) {
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// 构建UsernamePasswordAuthenticationToken,这里密码为null，是因为提供了正确的JWT,实现自动登录
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UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(null, null, new ArrayList<>() );
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SecurityContextHolder.getContext().setAuthentication(token);
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chain.doFilter(request, response);
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return;
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}
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String jwt = request.getHeader(JwtUtils.getHeader());
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// 这里如果没有jwt，继续往后走，因为后面还有鉴权管理器等去判断是否拥有身份凭证，所以是可以放行的
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// 没有jwt相当于匿名访问，若有一些接口是需要权限的，则不能访问这些接口
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if (StringUtils.isBlank(jwt)) {
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jwt = request.getParameter(JwtUtils.getHeader());
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if (StringUtils.isBlank(jwt)) {
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chain.doFilter(request, response);
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return;
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}
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}
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JwtUser jwtUser = JwtUtils.verifyToken(jwt);
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String username = jwtUser.getUserName();
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// TODO 处理各个状态
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switch (jwtUser.getStatus()){
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case EXPIRED:
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response.setStatus(400);
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chain.doFilter(request, response);
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// 异常
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return;
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case EXCEPTION:
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// 过期
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response.setStatus(400);
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chain.doFilter(request, response);
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return;
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case EXPIRING_SOON:
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// 即将过期
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// return;
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default:
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}
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// 构建UsernamePasswordAuthenticationToken,这里密码为null，是因为提供了正确的JWT,实现自动登录
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UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(username, jwtUser.getPassword(), new ArrayList<>() );
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SecurityContextHolder.getContext().setAuthentication(token);
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chain.doFilter(request, response);
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}
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}
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