跨域配置

gateway-service/src/main/java/com/diagbot/config/RouteConfigurer.java

@@ -0,0 +1,70 @@
+package com.diagbot.config;
+
+import org.springframework.cloud.client.discovery.DiscoveryClient;
+import org.springframework.cloud.gateway.discovery.DiscoveryClientRouteDefinitionLocator;
+import org.springframework.cloud.gateway.discovery.DiscoveryLocatorProperties;
+import org.springframework.cloud.gateway.route.RouteDefinitionLocator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.codec.ServerCodecConfigurer;
+import org.springframework.http.codec.support.DefaultServerCodecConfigurer;
+import org.springframework.http.server.reactive.ServerHttpRequest;
+import org.springframework.http.server.reactive.ServerHttpResponse;
+import org.springframework.web.cors.reactive.CorsUtils;
+import org.springframework.web.server.ServerWebExchange;
+import org.springframework.web.server.WebFilter;
+import org.springframework.web.server.WebFilterChain;
+import reactor.core.publisher.Mono;
+
+/**
+ * @Description:
+ * @author: gaodm
+ * @time: 2018/9/28 9:39
+ */
+@Configuration
+public class RouteConfigurer {
+
+    private static final String ALL = "*";
+    private static final String MAX_AGE = "18000L";
+
+    @Bean
+    public RouteDefinitionLocator discoveryClientRouteDefinitionLocator(DiscoveryClient discoveryClient,
+                                                                        DiscoveryLocatorProperties properties) {
+        return new DiscoveryClientRouteDefinitionLocator(discoveryClient, properties);
+    }
+
+    @Bean
+    public ServerCodecConfigurer serverCodecConfigurer() {
+        return new DefaultServerCodecConfigurer();
+    }
+
+    @Bean
+    public WebFilter corsFilter() {
+        return (ServerWebExchange ctx, WebFilterChain chain) -> {
+            ServerHttpRequest request = ctx.getRequest();
+            if (!CorsUtils.isCorsRequest(request)) {
+                return chain.filter(ctx);
+            }
+            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.addAll(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, requestHeaders.getAccessControlRequestHeaders());
+            if (requestMethod != null) {
+                headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, requestMethod.name());
+            }
+            headers.add(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");
+            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 chain.filter(ctx);
+        };
+    }
+}