Question

访问Spring引导服务器时，显示以下错误： Access to XMLHttpRequest at 'http://localhost:8080/oauth/token' from origin 'http://localhost:4200' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: It does not have HTTP ok status.

我的配置是 http.cors();

    CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(Arrays.asList("http://localhost:4200"));
        configuration.setAllowedMethods(Arrays.asList("GET","POST","OPTIONS"));
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }```

Answer 1

如果您这样提供，Springboot基本上会处理cors配置，但在这种情况下，可能是因为spring安全未在响应标头中添加Access-Control-Allow-Origin之类的CORS标头。当您进行ajax请求时，<最初会向服务器发出strong> flight 检查请求，然后服务器会使用一组标头进行响应，这些标头用于确定服务器是否支持cors请求。当您添加cors配置时，Spring MVC现在将处理来自浏览器的飞行前检查，但是我们需要告知Spring Security允许它通过，您可以通过添加像您这样的cors配置bean来完成提供，但您需要将http.cors设置为：

http.cors().and().authorizeRequests()
  .anyRequest().authenticated();

以便对飞行前请求进行身份验证。

如果问题仍然存在（通过添加自定义过滤器）： 因此，尝试添加一个过滤器以正确设置CORS标头（例如，根据需要从端点返回正确设置标头）：

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() {

    }
}

在配置中设置http.cors()时，它将从弹簧安全性中排除飞行前检查。

Spring Boot OAuth2 CORS在2.2.1版中不起作用

1 个答案: