springboot2.4.1跨域设置的变化

最近手贱，把一个项目的springboot版本由2.3升级到了2.4.1，结果开发时跨域失效了。查看接口日志，报错：

java.lang.IllegalArgumentException: When allowCredentials is true, allowedOrigins cannot contain the special value "*"since that cannot be set on the "Access-Control-Allow-Origin" response header. To allow credentials to a set of origins, list them explicitly or consider using "allowedOriginPatterns" instead.
	at org.springframework.web.cors.CorsConfiguration.validateAllowCredentials(CorsConfiguration.java:453)
	at org.springframework.web.cors.CorsConfiguration.checkOrigin(CorsConfiguration.java:557)
	at org.springframework.web.cors.DefaultCorsProcessor.checkOrigin(DefaultCorsProcessor.java:174)

 

原来开发版本的跨域这样设置：

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

   开发版本为了让所有web开发人员能访问，直接config.addAllowedOrigin("*")，到spring boot 2.4.1版本（对应spring5.3），allowCredentials为true的情况下，不允许addAllowedOrigin为“*”。当然可以使用allowedOriginPatterns代替。

    @Bean
    public FilterRegistrationBean<CorsFilter> corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        config.setAllowCredentials(true);
        
        List<String> allowedOriginPatterns = new ArrayList<>();
        allowedOriginPatterns.add("*");
        config.setAllowedOriginPatterns(allowedOriginPatterns);
        // config.addAllowedOrigin("*");
        config.addAllowedHeader("*");
        config.addAllowedMethod("*");
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", config);
        FilterRegistrationBean<CorsFilter> bean = new FilterRegistrationBean<CorsFilter>(new CorsFilter(source));
        bean.setOrder(Ordered.HIGHEST_PRECEDENCE);
        
        logger.warn("======CorsFilter injection=====AllowedOrigin: *====");
        
        return bean;
    }