spring网关跨域设置

在Spring Cloud Gateway中进行跨域设置，可以通过自定义GlobalFilter来实现。下面是一个示例代码：

@Component
public class CorsFilter implements GlobalFilter, Ordered {

    private static final String ALLOWED_HEADERS = "x-requested-with, authorization, Content-Type, Authorization, credential, X-XSRF-TOKEN";
    private static final String ALLOWED_METHODS = "GET, PUT, POST, DELETE, OPTIONS";
    private static final String ALLOWED_ORIGIN = "*";
    private static final String MAX_AGE = "3600";

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        if (!CorsUtils.isCorsRequest(request)) {
            return chain.filter(exchange);
        }
        HttpHeaders headers = request.getHeaders();
        ServerHttpResponse response = exchange.getResponse();
        HttpMethod requestMethod = headers.getAccessControlRequestMethod();
        HttpHeaders responseHeaders = response.getHeaders();
        responseHeaders.add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, ALLOWED_ORIGIN);
        responseHeaders.addAll(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, Arrays.asList(ALLOWED_HEADERS.split(",")));
        if (requestMethod != null) {
            responseHeaders.add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, ALLOWED_METHODS);
        }
        responseHeaders.add(HttpHeaders.ACCESS_CONTROL_MAX_AGE, MAX_AGE);
        if (request.getMethod() == HttpMethod.OPTIONS) {
            response.setStatusCode(HttpStatus.OK);
            return Mono.empty();
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return Ordered.HIGHEST_PRECEDENCE;
    }

}

这个GlobalFilter实现了跨域设置，可以处理OPTIONS请求，并在响应中添加跨域相关的头信息。通过将该Filter注册到Spring容器中，即可实现全局的跨域设置。