报错java.lang.UnsupportedOperationException，就是在请求头那块报错不支持

2022-08-26 16:12:11.334 ERROR 20032 --- [ctor-http-nio-2] o.s.w.s.adapter.HttpWebHandlerAdapter    : [7e7b8a68-1] Error [java.lang.UnsupportedOperationException] for HTTP GET "/plat/approveabc/websocket/1123213", but ServerHttpResponse already committed (200 OK)
2022-08-26 16:12:11.338 ERROR 20032 --- [ctor-http-nio-2] r.n.http.server.HttpServerOperations     : [id: 0x7e7b8a68, L:/127.0.0.1:8081 - R:/127.0.0.1:56941] Error finishing response. Closing connection
java.lang.UnsupportedOperationException: null
	at org.springframework.http.ReadOnlyHttpHeaders.set(ReadOnlyHttpHeaders.java:106) ~[spring-web-5.2.12.RELEASE.jar:5.2.12.RELEASE]
	Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
	|_ checkpoint ⇢ org.springframework.web.cors.reactive.CorsWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ HTTP GET "/plat/approveabc/websocket/1123213" [ExceptionHandlingWebHandler]
查看代码，发现是gateway处理跨域时使用的
 
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        final CorsConfiguration config = new CorsConfiguration();
        // 允许cookies跨域
        config.setAllowCredentials(true);
        // #允许向该服务器提交请求的URI，*表示全部允许，在SpringMVC中，如果设成*，会自动转成当前请求头中的Origin
        config.addAllowedOrigin("*");
        // #允许访问的头信息,*表示全部
        config.addAllowedHeader("*");
  return (exchange, chain) -> {
            ServerHttpRequest request = exchange.getRequest();
            if (!CorsUtils.isCorsRequest(request)) {
                return chain.filter(exchange);
            ServerHttpResponse response = exchange.getResponse();
            HttpHeaders headers = response.getHeaders();
            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, "*");
            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, "*");
            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, "*");
            headers.add(HttpHeaders.ACCESS_CONTROL_MAX_AGE, "3628800");
            return chain.filter(exchange);
就可以解决问题,后面那种解决跨域是reactive，在网关最好使用这种响应式编程，不然问题可能会很多