Spring启动中的 CORS 策略冲突

Question

我是Spring启动的新手，我使用Spring启动实现了一些基本的REST api。当我尝试使用反应调用这些api时，我在调用一些CORS策略时出现错误。然后我找到了解决这个问题的方法，除了登录api调用之外，我所有的api终端都正常工作。我在调用时遇到了同样的错误：

这是我的Web安全java类。

@EnableWebSecurity
public class WebSecurity extends WebSecurityConfigurerAdapter {

    private final UserService userDetailsService;
    private final BCryptPasswordEncoder bCryptPasswordEncoder;

    public WebSecurity(UserService userDetailsService, BCryptPasswordEncoder bCryptPasswordEncoder) {
        this.userDetailsService = userDetailsService;
        this.bCryptPasswordEncoder = bCryptPasswordEncoder;
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {

        http.csrf().disable().authorizeRequests().antMatchers(HttpMethod.POST, SecurityConstants.SIGN_UP_URL)
                .permitAll().anyRequest().authenticated().and().cors().and().addFilter(getAuthenticationFilter())
                .addFilter(new AuthorizationFilter(authenticationManager())).sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS);
    }

    @Override
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder);
    }

    public AuthenticationFilter getAuthenticationFilter() throws Exception {
        final AuthenticationFilter filter = new AuthenticationFilter(authenticationManager());
        filter.setFilterProcessesUrl("/users/login");
        return filter;
    }
}

这是我的示例控制器类。

@RestController
@RequestMapping("/users")
public class UserController {

    @Autowired
    UserService userService;

    @CrossOrigin
    @GetMapping(path = "/{id}", 
            produces = { MediaType.APPLICATION_XML_VALUE, MediaType.APPLICATION_JSON_VALUE })
    public UserRest getUser(@PathVariable String id) {

        UserRest returnValue = new UserRest();

        UserDto userDto = userService.getUserByUserId(id);
        BeanUtils.copyProperties(userDto, returnValue);

        return returnValue;
    }

    @CrossOrigin
    @PostMapping(
            consumes = { MediaType.APPLICATION_XML_VALUE, MediaType.APPLICATION_JSON_VALUE }, 
            produces = {MediaType.APPLICATION_XML_VALUE, MediaType.APPLICATION_JSON_VALUE })
    public UserRest createUser(@RequestBody UserDetailsRequestModel userDetails) {

        UserRest returnValue = new UserRest();

        UserDto userDto = new UserDto();
        BeanUtils.copyProperties(userDetails, userDto);

        UserDto createUser = userService.createUser(userDto);
        BeanUtils.copyProperties(createUser, returnValue);

        return returnValue;
    }
}

我被这个问题困住了，我真的需要一些帮助。我尝试了stackoverflow中给出的一些与我的问题类似的答案。但这并没有解决我的问题。Mt Spring Boot版本为2.1.4

Answer 1

试试这个，

@Configuration
public class WebConfiguration implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedMethods("*");
    }
}

您也可以执行以下操作，

@Bean
public FilterRegistrationBean corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration config = new CorsConfiguration();
        config.setAllowCredentials(true);
        config.setAllowedOrigins(Collections.singletonList("*"));
        config.addAllowedHeader("*");
        config.addAllowedMethod("*");
        source.registerCorsConfiguration("/**", config);
        FilterRegistrationBean<CorsFilter> filterRegistration = new FilterRegistrationBean<>(new CorsFilter(source));
        filterRegistration.setOrder(Ordered.HIGHEST_PRECEDENCE);
        return filterRegistration;
}

Answer 2

您面临这个问题是因为，您已经允许cors从端口8080到您的后端，但是您的react在本地端口3000上。因此，springboot不会接受来自不同端口地址的请求。

方法一：

您可以通过使用如下注释来解决这个问题:

@CrossOrigin(origins = "http://localhost:3000", maxAge = 3600)

因为您正在使用springboot，所以您也可以使用下面的全局配置来定义哪些域可以访问您的后端。

@Configuration
public class MyConfiguration {

    @Bean
    public WebMvcConfigurer corsConfigurer() {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void addCorsMappings(CorsRegistry registry) {
            registry.addMapping("/**")
                    .allowedOrigins("http://localhost:3000")
                    .allowedMethods("PUT", "DELETE", "GET", "POST") //or allow all as you like
                    .allowedHeaders("header1", "header2", "header3")
                    .exposedHeaders("header1", "header2")
                    .allowCredentials(false).maxAge(3600);
             }
        };
    }
}

如果您仍然有问题，可能是因为spring security没有在您的响应头中添加像< code > Access-Control-Allow-Origin 这样的CORS头。在这种情况下，您可以定义一个定制的CORS过滤器，并将其添加到Spring Security中，以便为所有Spring Securityendpoint设置CORS响应头。您可以创建一个过滤bean，如下所示:

public class CorsFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        HttpServletRequest request= (HttpServletRequest) servletRequest;

        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "GET,POST,DELETE,PUT,OPTIONS");
        response.setHeader("Access-Control-Allow-Headers", "*");
        response.setHeader("Access-Control-Allow-Credentials", true);
        response.setHeader("Access-Control-Max-Age", 180);
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {

    }
}

方法2：

由于您使用的是spring security，您还可以将CORS配置与spring security一起添加，如下所示:

@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.cors().and()
            //other configurations that you want
    }

    @Bean
    CorsConfigurationSource corsConfigurationSource()
    {
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(Arrays.asList("*"));
        //or any domain that you want to restrict to 
        configuration.setAllowedMethods(Arrays.asList("GET","POST"));
        //Add the method support as you like
        UrlBasedCorsConfigurationSource source = new     UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }
} 

Spring Security将占用CORS配置，即使您按照我的knowledge.But在方法1中提供它，在Spring留档中，他们也提供了这种使用Spring Security注册CORS的方式。

在您附加的控制台日志中，据说飞行前检查失败，因为返回的http状态不正常。因此，您可以尝试注册方法2之类的COR，并添加一个过滤器，以便正确添加标头作为响应。当登录页面被访问时，Springboot正在阻止飞行前检查。您需要使用spring security正确设置cors，以允许从不同的端口访问登录页面。

确认您的登录页面/login映射允许CORS

正式文件参考文件