package com.moon.server.interceptor;
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import com.alibaba.fastjson.JSON;
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import com.moon.server.entity.all.HttpStatus;
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import com.moon.server.entity.all.ResponseMsg;
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import com.moon.server.entity.all.StaticData;
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import com.moon.server.entity.sys.ResEntity;
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import com.moon.server.entity.sys.ResLogEntity;
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import com.moon.server.entity.sys.TokenEntity;
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import com.moon.server.entity.sys.UserEntity;
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import com.moon.server.helper.AsyncHelper;
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import com.moon.server.helper.HttpHelper;
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import com.moon.server.helper.StringHelper;
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import com.moon.server.helper.WebHelper;
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import com.moon.server.service.all.PermsService;
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import com.moon.server.service.all.SysService;
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import com.moon.server.service.sys.ResLogService;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import javax.annotation.Resource;
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import javax.servlet.*;
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import javax.servlet.annotation.WebFilter;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.util.List;
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import java.util.TimerTask;
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/**
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* 代理过滤器
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* @author WWW
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* @date 2023-07-04
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*/
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@WebFilter(urlPatterns = {"/proxy/*"})
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public class ProxyFilter implements Filter {
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@Resource
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private SysService sysService;
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@Resource
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private PermsService permsService;
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@Resource
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private ResLogService resLogService;
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private final static int LEN = "/proxy/".length();
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private static final Log log = LogFactory.getLog(ProxyFilter.class);
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public static final String ILLEGAL_RESOURCE = JSON.toJSONString(new ResponseMsg<String>(HttpStatus.UNAUTHORIZED, "没有资源访问权限"));
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@Override
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public void init(FilterConfig filterConfig) {
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}
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@Override
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public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) {
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try {
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HttpServletRequest req = (HttpServletRequest) request;
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HttpServletResponse res = (HttpServletResponse) response;
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// 2.获取令牌
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String token = getToken(req);
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// 3.获取用户
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UserEntity ue = getUser(res, token);
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if (null == ue) {
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return;
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}
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int resId = getResId(req.getRequestURI(), LEN + token.length() + 1);
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if (!check(req, res, ue, token)) {
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return;
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}
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// 9.获取资源实体
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ResEntity entity = getResEntity(ue, resId);
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if (null == entity) {
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WebHelper.writeStr2Page(res, ILLEGAL_RESOURCE);
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return;
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}
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insertLog(req, ue, resId);
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String url = getSourceUrl(req, entity);
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proxy(req, res, url);
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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}
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}
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@Override
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public void destroy() {
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}
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/**
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* 获取令牌
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*/
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private String getToken(HttpServletRequest req) {
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return req.getRequestURI().substring(LEN, req.getRequestURI().indexOf("/", LEN));
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}
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/**
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* 获取用户
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*/
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private UserEntity getUser(HttpServletResponse res, String token) {
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UserEntity ue = sysService.tokenService.getUserByToken(token);
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if (ue == null) {
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WebHelper.writeStr2Page(res, AuthInterceptor.NO_LOGIN);
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return null;
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}
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return ue;
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}
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/**
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* 获取资源ID
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*/
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private int getResId(String uri, int start) {
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int end = uri.indexOf("/", start);
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String str = -1 == end ? uri.substring(start) : uri.substring(start, end);
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return Integer.parseInt(str);
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}
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/**
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* 检查
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*/
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private boolean check(HttpServletRequest req, HttpServletResponse res, UserEntity ue, String token) {
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// 4.获取IP
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String ip = WebHelper.getIpAddress(req);
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if (StringHelper.isEmpty(ip)) {
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return WebHelper.writeStr2Page(res, AuthInterceptor.IP_NULL);
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}
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// 5.检查黑名单
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if (!checkBlackList(ip, req)) {
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return WebHelper.writeStr2Page(res, AuthInterceptor.BLACK_LIST);
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}
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// 6.admin跳过权限检测
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if (StaticData.ADMIN.equals(ue.getUid())) {
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return true;
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}
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// 7.检查白名单
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if (!checkWhiteList(ip, req)) {
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// 检查IP一致性
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if (!checkIpSource(ip, token)) {
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return WebHelper.writeStr2Page(res, AuthInterceptor.ILLEGAL_TOKEN);
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}
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}
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// 8.检查用户ID是否禁用
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if (sysService.tokenService.isUidDisable(ue)) {
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return WebHelper.writeStr2Page(res, AuthInterceptor.USER_LOCK);
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}
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return true;
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}
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/**
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* 检查黑名单
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*/
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private boolean checkBlackList(String ip, HttpServletRequest request) {
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List<String> blackList = sysService.blacklistService.selectIpList(1);
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if (blackList == null || blackList.isEmpty()) {
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return true;
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}
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if (blackList.contains(ip)) {
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return false;
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}
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return true;
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}
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/**
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* 检查白名单
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*/
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private boolean checkWhiteList(String ip, HttpServletRequest request) {
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List<String> whiteList = sysService.blacklistService.selectIpList(2);
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if (whiteList == null || whiteList.isEmpty()) {
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return false;
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}
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return whiteList.contains(ip);
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}
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/**
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* 检查IP一致性
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*/
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private boolean checkIpSource(String ip, String token) {
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TokenEntity te = sysService.tokenService.getEntityByToken(token);
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return te.getIp().equals(ip);
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}
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/**
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* 检查资源权限
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*/
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private ResEntity getResEntity(UserEntity ue, int resId) {
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String uid = StaticData.ADMIN.equals(ue.getUid()) ? null : ue.getUid();
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List<ResEntity> rs = permsService.selectResList(uid);
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if (null == rs || rs.isEmpty()) {
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return null;
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}
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// List<ResEntity> list = rs.stream().filter(resEntity -> resEntity.getId() == resId).collect(Collectors.toList());
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for (ResEntity entity : rs) {
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if (resId == entity.getId()) {
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return entity;
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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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* 插入日志
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*/
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private void insertLog(HttpServletRequest req, UserEntity ue, int resId) {
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AsyncHelper helper = new AsyncHelper();
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helper.execute(new TimerTask() {
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@Override
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public void run() {
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String ip = WebHelper.getIpAddress(req);
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ResLogEntity entity = new ResLogEntity();
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entity.setResid(resId);
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entity.setType(getRequestType(req.getMethod()));
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entity.setIp(ip);
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entity.setUrl(req.getRequestURL().toString());
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entity.setCreateUser(ue.getId());
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resLogService.insert(entity);
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}
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});
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}
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/**
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* 获取请求类别
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*/
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private int getRequestType(String method) {
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// 请求类：1-GET，2-POST，3-PUT，4-DELETE，5-TRACE，6-HEAD，7-OPTIONS，8-CONNECT';
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switch (method) {
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case "GET":
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return 1;
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case "POST":
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return 2;
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case "PUT":
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return 3;
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case "DELETE":
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return 4;
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case "TRACE":
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return 5;
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case "HEAD":
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return 6;
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case "OPTIONS":
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return 7;
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case "CONNECT":
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return 8;
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default:
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return -1;
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}
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}
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/**
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* 获取原始Url
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*/
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private String getSourceUrl(HttpServletRequest req, ResEntity entity) {
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return "";
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}
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/**
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* 代理服务
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*/
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private void proxy(HttpServletRequest request, HttpServletResponse response, String url) throws Exception {
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HttpHelper httpHelper = new HttpHelper();
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httpHelper.service(request, response, url, null);
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}
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}
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