gateway搭配nacos进行路由转发并配置跨域

先上nacos和gateway需要的POM

<!--SpringCloud ailibaba nacos -->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

<!--gateway-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.retry</groupId>
    <artifactId>spring-retry</artifactId>
</dependency>

yml配置

跨域配置类

@Configuration
public class Cors {
          
   

    private static final String MAX_AGE = "18000L";

    @Bean
    public WebFilter corsFilter() {
          
   
        return (ServerWebExchange ctx, WebFilterChain chain) -> {
          
   
            ServerHttpRequest request = ctx.getRequest();
            if (CorsUtils.isCorsRequest(request)) {
          
   
                HttpHeaders requestHeaders = request.getHeaders();
                ServerHttpResponse response = ctx.getResponse();
                HttpMethod requestMethod = requestHeaders.getAccessControlRequestMethod();
                HttpHeaders headers = response.getHeaders();
                headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, "*");
                headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, "PUT,POST,GET,DELETE,OPTIONS");

                headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS,"Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token");
                headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");
                headers.add(HttpHeaders.ACCESS_CONTROL_EXPOSE_HEADERS, "*");
                headers.add(HttpHeaders.ACCESS_CONTROL_MAX_AGE, MAX_AGE);
                if (request.getMethod() == HttpMethod.OPTIONS) {
          
   
                    response.setStatusCode(HttpStatus.OK);
                    return Mono.empty();
                }
            }

            return chain.filter(ctx);
        };
    }

    @Bean
    public ServerCodecConfigurer serverCodecConfigurer() {
          
   
        return new DefaultServerCodecConfigurer();
    }

    @Bean
    public HiddenHttpMethodFilter hiddenHttpMethodFilter() {
          
   
        return new HiddenHttpMethodFilter() {
          
   
            @Override
            public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
          
   
                return chain.filter(exchange);
            }
        };
    }
}