Spring Cloud Gateway -- Cors解决跨域问题

逃离我推掉我的手 2022-04-25 10:26 186阅读 0赞

### Spring Cloud Gateway -- Cors解决跨域问题 ###

*  前言
 *  Cors

# 前言 #

由于前后端分离就会碰到跨域问题，原本我们在后端采用Cors就能解决，现在利用网关，那么就放在网关这层做好了。

# Cors #

/** * 跨域允许 */
    @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, requestHeaders.getOrigin());
                    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);
                }
            };
        }
    }