springcloud gateway 跨域问题

太过爱你忘了你带给我的痛 2022-02-04 12:13 251阅读 0赞

**由于gateway使用的是webflux，而不是springmvc，所以需要先关闭webflux的cors，再从gateway的filter里边设置cors就行了。**

##### 首先gateway版本 #####

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-gateway</artifactId>
                <version>2.0.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-gateway-core</artifactId>
                <version>2.0.1.RELEASE</version>
            </dependency>

\*\* ps: 2.0.1.RELEASE 以下的版本有bug，Conten-Type 如果请求没有设置的话，会报空指针NPE 问题。  
官方在2.0.1的版本修复了\*\*

/**
     * @ClassName CorsConfig
     * @Author dlh
     * @Date 2019/5/7 0007 下午 4:55
     * @Version 1.0
     **/
    @Configuration
    public class CorsConfig {
        @Bean
        public CorsWebFilter corsFilter() {
            CorsConfiguration config = new CorsConfiguration();
            config.addAllowedMethod("*");
            config.addAllowedOrigin("*");
            config.addAllowedHeader("*");
    
            UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
            source.registerCorsConfiguration("/**", config);
    
            return new CorsWebFilter(source);
        }
    }

**网关之前设置的是全局filter**

/**
     * @ClassName CrossOriginFilter
     * @Author dlh
     * @Date 2019/5/7 0007 下午 4:50
     * @Version 1.0
     **/
    @Component
    public class CrossOriginFilter implements GlobalFilter, Ordered {
    
        private static Logger logger = LoggerFactory.getLogger(CrossOriginFilter.class);
    
        private static final String ALL = "*";
        private static final String MAX_AGE = "18000L";
    
    
        @Override
        public Mono<Void> filter(ServerWebExchange serverWebExchange, GatewayFilterChain gatewayFilterChain) {
            ServerHttpRequest request = serverWebExchange.getRequest();
            ServerHttpResponse response = serverWebExchange.getResponse();
            HttpHeaders headers = response.getHeaders();
            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, "*");
            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, "POST, GET, PUT, OPTIONS, DELETE, PATCH");
            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");
            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, "*");
            headers.add(HttpHeaders.ACCESS_CONTROL_EXPOSE_HEADERS, ALL);
            headers.add(HttpHeaders.ACCESS_CONTROL_MAX_AGE, MAX_AGE);
            if (request.getMethod() == HttpMethod.OPTIONS) {
                response.setStatusCode(HttpStatus.OK);
                return Mono.empty();
            }
            return gatewayFilterChain.filter(serverWebExchange);
        }
    
        @Override
        public int getOrder() {
            return -300;
        }
    }

**转载 https://www.jianshu.com/p/a46e62f9ad1c**