package com.doumee.config.cloudfilter;
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import com.alibaba.fastjson.JSONObject;
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import com.doumee.config.annotation.CloudRequiredPermission;
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import com.doumee.config.annotation.LoginNoRequired;
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import com.doumee.core.constants.ResponseStatus;
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import com.doumee.core.exception.BusinessException;
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import com.doumee.service.business.third.model.LoginUserInfo;
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import com.doumee.core.utils.Constants;
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import org.apache.commons.lang3.StringUtils;
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import org.springframework.data.redis.core.RedisTemplate;
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import org.springframework.web.method.HandlerMethod;
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import org.springframework.web.servlet.HandlerInterceptor;
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import javax.servlet.ServletInputStream;
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import javax.servlet.http.Cookie;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletRequestWrapper;
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import javax.servlet.http.HttpServletResponse;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.util.*;
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public class LoginHandlerInterceptor implements HandlerInterceptor {
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private RedisTemplate<String,Object> stringRedisTemplate;
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// 由于该类未交给spring管理，因此不能使用自动装配的方式获取RedisTemplate对象
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public LoginHandlerInterceptor(RedisTemplate<String,Object> stringRedisTemplate) {
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this.stringRedisTemplate = stringRedisTemplate;
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}
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@Override
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public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
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if(handler instanceof HandlerMethod){
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HandlerMethod handlerMethod = (HandlerMethod) handler;
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Class<?> beanType = handlerMethod.getBeanType();
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if (!beanType.isAnnotationPresent(LoginNoRequired.class) && !handlerMethod.hasMethodAnnotation(LoginNoRequired.class)) {
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//获取token
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Cookie[] cookies = request.getCookies();
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String token = request.getHeader(Constants.HEADER_USER_TOKEN); // 从 http 请求头中取出 token
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if(StringUtils.isBlank(token)){
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for(Cookie c :cookies){
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if(StringUtils.equals(c.getName(),Constants.HEADER_USER_TOKEN)){
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token = c.getValue();
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}
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}
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}
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if (StringUtils.isNotBlank(token)) {
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LoginUserInfo user = checkLogin(token);
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if (handlerMethod.hasMethodAnnotation(CloudRequiredPermission.class)) {
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CloudRequiredPermission p = handlerMethod.getMethodAnnotation(CloudRequiredPermission.class);
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if(p.value()!=null && p.value().length>0){
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boolean hasPermission = false;
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for(String s :p.value()){
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if(user.getPermissions()!=null){
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for(String t :user.getPermissions()){
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if(StringUtils.equals(t,s)){
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hasPermission = true;
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break;
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}
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}
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}
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}
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if(!hasPermission) {
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//没有操作权限
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throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(),"没有该操作权限");
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}
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}
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}
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/* try {
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CustomHttpServletRequestWrapper requestWrapper = (CustomHttpServletRequestWrapper)request;
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String body = requestWrapper.getBody();
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JSONObject object = JSONObject.parseObject(body);
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if(object!=null){
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object.put("loginUserinfo",user);
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requestWrapper.setBody( JSONObject.toJSONString(object));
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}
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}catch (Exception e){
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}*/
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} else {
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throw new BusinessException(ResponseStatus.NO_LOGIN.getCode(),request.getRequestURI()+"未登录");
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}
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}
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}else{
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throw new BusinessException(ResponseStatus.NO_LOGIN.getCode(),request.getRequestURI()+"未登录");
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}
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return true;
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}
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private String getRequestBody(HttpServletRequest request) {
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// 实现从request获取请求体的逻辑
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String body = null;
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ServletInputStream inputStream = null;
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try {
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inputStream = request.getInputStream();
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String charset = request.getCharacterEncoding(); // 可能为null
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if (charset == null) {
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charset = "UTF-8"; // 默认编码
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}
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BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, charset));
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StringBuilder stringBuilder = new StringBuilder();
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String line = null;
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while ((line = reader.readLine()) != null) {
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stringBuilder.append(line + "\n");
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}
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body = stringBuilder.toString();
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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return body;
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}
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private LoginUserInfo checkLogin(String token) {
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if (token == null || token.isEmpty()) {
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throw new BusinessException(ResponseStatus.NO_LOGIN.getCode(),"未登录");
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}
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String userinfo =(String) stringRedisTemplate.opsForValue().get(Constants.REDIS_TOKEN_KEY + token);
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if (StringUtils.isBlank(userinfo)) {
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throw new BusinessException(ResponseStatus.NO_LOGIN.getCode(),"未登录");
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}
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LoginUserInfo user = JSONObject.toJavaObject(JSONObject.parseObject(userinfo),LoginUserInfo.class );
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if(user ==null ){
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throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(),"用户登陆已失效，请重新登陆！");
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}
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//权限判断------------
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return user;
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}
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// @Override
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public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
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// UserContext.removeUser();
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}
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class RSARequestWrapper extends HttpServletRequestWrapper {
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private Map<String, String[]> params = new HashMap<>();
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/**
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* 必须要实现的构造方法
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* @param request
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*/
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public RSARequestWrapper(HttpServletRequest request) {
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super(request);
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//将参数表，赋予给当前的Map以便于持有request中的参数
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this.params.putAll(request.getParameterMap());
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}
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/**
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* 重载构造方法
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* @param request
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* @param extendParams
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*/
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public RSARequestWrapper(HttpServletRequest request, Map<String, Object> extendParams) {
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this(request);
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//这里将扩展参数写入参数表
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addAllParameters(extendParams);
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}
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/**
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* 在获取所有的参数名,必须重写此方法，否则对象中参数值映射不上
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* @return
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*/
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@SuppressWarnings({ "unchecked", "rawtypes" })
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@Override
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public Enumeration<String> getParameterNames() {
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return new Vector(params.keySet()).elements();
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}
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/**
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* 增加多个参数
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* @param otherParams 增加的多个参数
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*/
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public void addAllParameters(Map<String, Object> otherParams) {
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for (Map.Entry<String, Object> entry : otherParams.entrySet()) {
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addParameter(entry.getKey(), entry.getValue());
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}
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}
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/**
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* 增加参数
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* getParameterMap()中的类型是<String,String[]>类型的，所以这里要将其value转为String[]类型
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* @param name 参数名
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* @param value 参数值
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*/
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public void addParameter(String name, Object value) {
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if (value != null) {
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if (value instanceof String[]) {
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params.put(name, (String[]) value);
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} else if (value instanceof String) {
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params.put(name, new String[]{(String) value});
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} else {
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params.put(name, new String[]{String.valueOf(value)});
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}
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}
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}
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@Override
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public String[] getParameterValues(String name) {
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String[] access_token_user_id = params.get("access_token_user_id");
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String[] values = params.get(name);//getValue(name);
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if (values == null || access_token_user_id==null){
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return null;
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}
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return values;
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}
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@Override
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public String getParameter(String name) {
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String[] access_token_user_id = params.get("access_token_user_id");
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String[] values = params.get(name);//getValue(name);
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if (values == null || access_token_user_id==null){
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return null;
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}
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return values[0];
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}
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}
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}
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