package jnpf.config;
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import org.springframework.cloud.client.discovery.ReactiveDiscoveryClient;
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import org.springframework.cloud.gateway.discovery.DiscoveryClientRouteDefinitionLocator;
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import org.springframework.cloud.gateway.discovery.DiscoveryLocatorProperties;
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import org.springframework.cloud.gateway.route.RouteDefinitionLocator;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.core.annotation.Order;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.HttpMethod;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.codec.ServerCodecConfigurer;
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import org.springframework.http.codec.support.DefaultServerCodecConfigurer;
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import org.springframework.http.server.reactive.ServerHttpRequest;
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import org.springframework.http.server.reactive.ServerHttpResponse;
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import org.springframework.web.cors.reactive.CorsUtils;
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import org.springframework.web.server.WebFilter;
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import reactor.core.publisher.Mono;
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/**
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* 跨域问题
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*
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* @author JNPF开发平台组
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* @version V3.1.0
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* @copyright 引迈信息技术有限公司（https://www.jnpfsoft.com）
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* @date 2021-03-24
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*/
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@Configuration
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public class CorsConfig {
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private static final String ALL = "*";
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private static final String MAX_AGE = "18000L";
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@Bean
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public RouteDefinitionLocator discoveryClientRouteDefinitionLocator(ReactiveDiscoveryClient discoveryClient, DiscoveryLocatorProperties properties) {
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return new DiscoveryClientRouteDefinitionLocator(discoveryClient, properties);
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}
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//AuthFilter的默认顺序是-100 跨域配置在认证之前执行
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// @Bean
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// @Order(-200)
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public WebFilter corsFilter() {
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return (ctx, chain) -> {
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ServerHttpRequest request = ctx.getRequest();
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if (!CorsUtils.isCorsRequest(request)) {
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return chain.filter(ctx);
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}
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HttpHeaders requestHeaders = request.getHeaders();
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ServerHttpResponse response = ctx.getResponse();
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HttpMethod requestMethod = requestHeaders.getAccessControlRequestMethod();
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HttpHeaders headers = response.getHeaders();
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headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, requestHeaders.getOrigin());
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headers.addAll(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, requestHeaders.getAccessControlRequestHeaders());
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if (requestMethod != null) {
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headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, requestMethod.name());
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}
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headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");
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headers.add(HttpHeaders.ACCESS_CONTROL_EXPOSE_HEADERS, ALL);
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headers.add(HttpHeaders.ACCESS_CONTROL_MAX_AGE, MAX_AGE);
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if (request.getMethod() == HttpMethod.OPTIONS) {
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response.setStatusCode(HttpStatus.OK);
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return Mono.empty();
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}
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return chain.filter(ctx);
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};
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}
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@Bean
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public ServerCodecConfigurer serverCodecConfigurer() {
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return new DefaultServerCodecConfigurer();
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}
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}
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