如何不花钱开发网站,网页设计作业文件,不知此网站枉做男人的网站,wordpress禁止图压缩文章目录 1、基于session的认证2、Demosession实现认证session实现授权 1、基于session的认证 流程#xff1a;
用户认证成功后#xff0c;服务端生成用户数据保存在session中服务端返回给客户端session id (sid#xff09;#xff0c;被客户端存到自己的cookie中客户端下… 文章目录 1、基于session的认证2、Demosession实现认证session实现授权 1、基于session的认证 流程
用户认证成功后服务端生成用户数据保存在session中服务端返回给客户端session id (sid被客户端存到自己的cookie中客户端下次再请求就带上sid服务端校验是否存在对应的session存在则不要求用户再登录了
2、Demo
基于Session的认证机制由Servlet制定规范Serlvet容器以实现HttpSession相关方法
方法用途HttpSession getSession(Boolean create)获取当前HttpSession对象void setAttribute(String name,Object value)向session中存放对象object getAttribute(String name)从session中获取对象void removeAttribute(String name);移除session中对象void invalidate()使HttpSession失效
准备实体类
Data
public class AuthenticationRequestDto {/*** 用户名*/private String username;/*** 密码*/private String password;
}
Data
AllArgsConstructor
public class UserVo {private String id;private String username;private String password;private String fullname;private String mobile;
}session实现认证
用Map模拟查询数据库存储用户信息
Service
public class AuthenticationServiceImpl implements AuthenticationService {private final MapString, UserVo userMap new HashMap();{userMap.put(zhangsan, new UserVo(1010, zhangsan, 123, zhangSan, 133443));userMap.put(lisi, new UserVo(1011, lisi, 456, liSi, 144553));}Overridepublic UserVo auth(AuthenticationRequestDto dto) {if (dto null|| StringUtils.isEmpty(dto.getUsername())|| StringUtils.isEmpty(dto.getPassword())) {throw new RuntimeException(账户或密码为空);}//模拟查询数据库UserVo vo getUserVo(dto.getUsername());if (null vo) {throw new RuntimeException(用户不存在);}if (!vo.getPassword().equals(dto.getPassword())) {throw new RuntimeException(密码错误);}return vo;}public UserVo getUserVo(String username) {return userMap.get(username);}}
定义三个接口登录服务端保存session登出让session失效。以及一个资源接口查看当前是登录访问资源还是未登录访问资源
RestController
public class Controller {Resourceprivate AuthenticationService authenticationService;GetMapping(value /login)public String login(AuthenticationRequestDto dto, HttpSession session) {UserVo userVo authenticationService.auth(dto);//用户信息存入sessionsession.setAttribute(sid, userVo);return userVo.getFullname() success login;}GetMapping(/logout)public String logout(HttpSession session) {//让session失效session.invalidate();return success logout;}GetMapping(/r1)public String resource(HttpSession session) {String fullName null;Object result session.getAttribute(sid);if (result ! null) {fullName ((UserVo) result).getFullname();} else {fullName no login;}return fullName access resource ... ;}}测试 登录后访问资源接口 退出登录后再访问资源接口 session实现授权
修改实体类加个权限字段存储用户权限
Data
AllArgsConstructor
public class UserVo {private String id;private String username;private String password;private String fullname;private String mobile;/*** 用户权限*/private SetString authorities;
}
实例代码块创建用户到map的代码做调整
{SetString auth1 new HashSet();auth1.add(p1); //对应/r1这个接口资源SetString auth2 new HashSet();auth2.add(p2); //对应/r2这个接口资源userMap.put(zhangsan, new UserVo(1010, zhangsan, 123, zhangSan, 133443, auth1));userMap.put(lisi, new UserVo(1011, lisi, 456, liSi, 144553, auth2));}加个测试资源接口/r2
GetMapping(/r2)public String resource2(HttpSession session) {String fullName null;Object result session.getAttribute(sid);if (result ! null) {fullName ((UserVo) result).getFullname();} else {fullName no login;}return fullName access resource ... ;}
写拦截器
ComponentScan
public class SimpleAuthInterceptor implements HandlerInterceptor {/*** 校验用户请求的url是否在权限范围中*/Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {//从http请求中获取session对象再拿当前HttpSession对象Object object request.getSession().getAttribute(sid);//没有认证if (object null) {writeContent(response, 请登录);}UserVo userVo (UserVo) object;//请求的urlString requestURI request.getRequestURI();assert userVo ! null;if (userVo.getAuthorities().contains(p1) requestURI.contains(/r1)) {return true;}if (userVo.getAuthorities().contains(p2) requestURI.contains(/r2)) {return true;}//拒绝访问writeContent(response,没有权限拒绝访问);return false;}private void writeContent(HttpServletResponse response, String msg) throws IOException {response.setContentType(text/html;charsetutf-8);PrintWriter writer response.getWriter();writer.print(msg);writer.close();}
}拦截器add并放行/login只测/r**接口
Configuration
EnableWebMvc
public class WebConfig implements WebMvcConfigurer {/*** 视图解析器*/Beanpublic InternalResourceViewResolver viewResolver(){InternalResourceViewResolver viewResolver new InternalResourceViewResolver();viewResolver.setPrefix(/static/); //前缀viewResolver.setSuffix(.jsp); //后缀return viewResolver;}Overridepublic void addViewControllers(ViewControllerRegistry registry) {registry.addViewController(/).setViewName(login);}Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new SimpleAuthInterceptor()).addPathPatterns(/r**); //新加进来的拦截器只针对r打头的接口否则login接口也会被拦截要求登录}
}测试登录zhangsan其有r1权限访问r2接口
