六.SpringSecurity基础-认证授权结果处理

小灰灰 2022-12-01 15:42 204阅读 0赞

### 1.认证结果处理 ###

#### 1.1.认证成功处理 ####

在传统的应用中，认证成功后页面需要跳转到认证成功页面或者跳转到个人中心页，但是在前后端分离的项目通常是使用Ajax请求完成认证，这时候我们需要返回一个JSON结果告知前端认证结果，然后前端自行跳转页面。

要做到上述功能，我们需要自定义认证成功处理器实现`AuthenticationSuccessHandler`接口复写 `onAuthenticationSuccess`方法，该方法其中一个参数是Authentication ，他里面封装了认证信息,用户信息UserDetails等，我们需要在这个方法中使用Response写出json数据即可

**1.导入JSON依赖**

<dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.50</version>
    </dependency>

**2.定义AuthenticationSuccessHandler**

定义类实现AuthenticationSuccessHandler接口复写onAuthenticationSuccess方法，实现自己的认证成功结果处理

public class MyAuthenticationSuccessHandler implements AuthenticationSuccessHandler { 
        @Override
    	public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) 
    throws IOException, ServletException { 
            response.setContentType("application/json;charset=utf-8");
            Map map = new HashMap<>();
            map.put("success",true);
            map.put("message","认证成功");
            map.put("data",authentication);
            response.getWriter().print(JSON.toJSONString(map));
            response.getWriter().flush();
            response.getWriter().close();
        }
    }

**3.配置AuthenticationSuccessHandler**

在SpringSecurity配置定义的AuthenticationSuccessHandler

http.formLogin()
    //.successForwardUrl("/loginSuccess") // 设置登陆成功页
    .successHandler(new MyAuthenticationSuccessHandler)
    ...

#### 1.2.认证失败结果处理 ####

自定义登录失败的处理，需要实现AuthenticationFailureHandler接口，复写onAuthenticationFailure方法实现自己的认证失败结果处理

**1.定义认证失败处理器**

public class MyAuthenticationFailureHandler implements AuthenticationFailureHandler { 
        @Override
        public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException { 
    	    response.setContentType("application/json;charset=utf-8");
            Map map = new HashMap<>();
            map.put("success",false);
            map.put("message","认证失败");
            response.setStatus(HttpStatus.UNAUTHORIZED.value());
            response.getWriter().print(JSON.toJSONString(map));
            response.getWriter().flush();
            response.getWriter().close();
        }
    }

**2.配置处理器**

http.formLogin()
    .failureHandler(new MyAuthenticationFailureHandler)
    ...

### 2.授权结果处理 ###

#### 1.授权失败处理 ####

当用户请求资源服务的资源时，需要进行用户的认证和授权检查，当认证或授权检查失败，我们需要要返回自己的失败结果信息，可以通过HttpSecurity设置授权失败结果处理器,内部通过 ExceptionTranslationFilter 调用AuthenticationEntryPoint实现匿名用户授权失败结果处理， ExceptionTranslationFilter 通过 AccessDeniedHandler来处理授权失败结果处理。

**1.定义认证检查失败处理**

定义AccessDeineHandler 用来解决认证过的用户访问无权限资源时的异常

public class DefaultAccessDeniedHandler implements AccessDeniedHandler { 
    
        @Override
        public void handle(HttpServletRequest request, HttpServletResponse response, AccessDeniedException accessDeniedException) throws IOException, ServletException { 
            String result = JSON.toJSONString(AjaxResult.me().setSuccess(false).setMessage("无访问权限"));
            response.setContentType("text/html;charset=utf-8");
            PrintWriter writer = response.getWriter();
            writer.print(result);
            writer.flush();
            writer.close();
        }
    }

**2.定义AuthenticationEntryPoint**

AuthenticationEntryPoint 用来解决匿名用户访问无权限资源时的异常

public class MyAuthenticationEntryPoint implements AuthenticationEntryPoint { 
        @Override
        public void commence(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, AuthenticationException e) throws IOException, ServletException { 
            e.printStackTrace();
            httpServletResponse.setContentType("application/json;charset=utf-8");
            Map<String,Object> result = new HashMap<>();
            result.put("success",false);
            result.put("message","登录失败，用户名或密码错误["+e.getMessage()+"]");
            httpServletResponse.getWriter().print(JSONUtils.toJSONString(result));
        }
    }

**3.配置异常处理器**

配置异常处理器

httpSecurity.exceptionHandling()
     .accessDeniedHandler(new DefaultAccessDeniedHandler ())
    .authenticationEntryPoint(new MyAuthenticationEntryPoint()) //身份认证验证失败配置