springsecurity如何使用application/json接收數據

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spring security 使用 application/json 接收數據

不了解 security 的請看 security 的簡單使用

https://blog.51cto.com/5013162/2404946

在使用 spring security 登錄用戶的時候 發現使用 application/josn 后臺不能獲取到數據
看 UsernamePasswordAuthenticationFilter 源碼發現

    //獲取密碼
    protected String obtainPassword(HttpServletRequest request) {
         return request.getParameter(passwordParameter);
    }
    //獲取用戶名
    protected String obtainUsername(HttpServletRequest request) {
         return request.getParameter(usernameParameter);
    }

是直接從request 獲取的  不是從 requestBody 中獲取的

那我們就只需要重寫這兩個方法從 requestBody 中獲取參數

重寫 UsernamePasswordAuthenticationFilter  類

    public class UserAuthenticationFilter extends UsernamePasswordAuthenticationFilter {

        private ThreadLocal<Map<String,String>> threadLocal = new ThreadLocal<>();

        @Override
        protected String obtainPassword(HttpServletRequest request) {
                String password = this.getBodyParams(request).get(super.SPRING_SECURITY_FORM_PASSWORD_KEY);
                if(!StringUtils.isEmpty(password)){
                        return password;
                }
                return super.obtainPassword(request);
        }

        @Override
        protected String obtainUsername(HttpServletRequest request) {
                String username = this.getBodyParams(request).get(super.SPRING_SECURITY_FORM_USERNAME_KEY);
                if(!StringUtils.isEmpty(username)){
                        return username;
                }
                return super.obtainUsername(request);
        }

        /**
         * 獲取body參數  body中的參數只能獲取一次 
         * @param request
         * @return
         */
        private Map<String,String> getBodyParams(HttpServletRequest request){
                Map<String,String> bodyParams =  threadLocal.get();
                if(bodyParams==null) {
                        ObjectMapper objectMapper = new ObjectMapper();
                        try (InputStream is = request.getInputStream()) {
                                bodyParams = objectMapper.readValue(is, Map.class);
                        } catch (IOException e) {
                        }
                        if(bodyParams==null) bodyParams = new HashMap<>();
                        threadLocal.set(bodyParams);
                }

                return bodyParams;
        }
}

自定義 SecurityConfig 類

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

        @Autowired
        UserDetailServiceImpl userDetailService;
        @Autowired
        LoginSuccessHandler loginSuccessHandler;

        @Override
        protected void configure(AuthenticationManagerBuilder auth) throws Exception {
                //自定義用戶驗證和加密方式
                auth.userDetailsService(userDetailService).passwordEncoder(new BCryptPasswordEncoder());
        }

        @Override
        protected void configure(HttpSecurity http) throws Exception {
                http.formLogin()                    //  定義當需要用戶登錄時候，轉到的登錄頁面。
        //          .loginPage("/login.html") //自定義登錄頁面
//                .loginProcessingUrl("/login") //自定義登錄接口地址
//                .successHandler(loginSuccessHandler)
                                .and()
                                // 定義哪些URL需要被保護、哪些不需要被保護
                                .authorizeRequests().antMatchers("/login").permitAll() //不需要保護的URL
                                .anyRequest()               // 任何請求,登錄后可以訪問
                                .authenticated()
                                .and()
                                .logout().logoutSuccessUrl("/login").permitAll() // 登出
                                .and()
                                .csrf().disable();
                //配置自定義過濾器 增加post json 支持
                http.addFilterAt(UserAuthenticationFilterBean(), UsernamePasswordAuthenticationFilter.class);
        }

        private UserAuthenticationFilter UserAuthenticationFilterBean() throws Exception {
                UserAuthenticationFilter userAuthenticationFilter = new UserAuthenticationFilter();
                userAuthenticationFilter.setAuthenticationManager(super.authenticationManager());
                userAuthenticationFilter.setAuthenticationSuccessHandler(loginSuccessHandler);
                return userAuthenticationFilter;
        }
}

登錄成功處理類
LoginSuccessHandler.class

@Component
public class LoginSuccessHandler implements AuthenticationSuccessHandler {
        @Override
        public void onAuthenticationSuccess(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Authentication authentication) throws IOException, ServletException {

                httpServletResponse.setContentType("application/json;charset=UTF-8");

                httpServletResponse.getWriter().write(authentication.getName());
        }
}

用戶校驗處理類

@Component
public class UserDetailServiceImpl implements UserDetailsService {
        /**
         * 用戶校驗
         * @param s
         * @return
         * @throws UsernameNotFoundException
         */
        @Override
        public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
                Collection<GrantedAuthority> collection = new ArrayList<>();//權限集合
                String password = new BCryptPasswordEncoder().encode("123456");
                User user = new User(s,password,collection);

                return user;
        }

}

改造完成 支持 post application/json  同時也支持 post form-data/x-www-form-urlencoded
都可以獲取到傳入的參數

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