本篇文章小编给大家分享一下SpringCloud gateway跨域配置操作代码,文章代码介绍的很详细,小编觉得挺不错的,现在分享给大家供大家参考,有需要的小伙伴们可以来看看。
gateway跨域配置
gateway允许跨域的配置和zuul的不一样,记录一下。
版本
org.springframework.boot spring-boot-starter-parent 2.0.6.RELEASE UTF-8 UTF-8 1.8 Finchley.SR1
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; /** * 跨域允许 */ @Configuration public class CorsConfig { 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.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, "*"); 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(); } /** * 如果使用了注册中心(如:Eureka),进行控制则需要增加如下配置 */ @Bean public RouteDefinitionLocator discoveryClientRouteDefinitionLocator(DiscoveryClient discoveryClient, DiscoveryLocatorProperties properties) { return new DiscoveryClientRouteDefinitionLocator(discoveryClient, properties); } }
gateway解决前端跨域问题
前后端分离普遍都会遇到跨域问题,项目内用到了网关模块,所以我们可以在网关中解决。
解决
增加以下两个类既可
package com.him.gateway.config; import com.him.gateway.filter.CorsResponseHeaderFilter; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.cors.CorsConfiguration; import org.springframework.web.cors.reactive.CorsWebFilter; import org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource; /** * 配置跨域问题 * * @author liaoyuxing * @date 2021-5-20 */ @Configuration public class CorsConfig { @Bean public CorsResponseHeaderFilter corsResponseHeaderFilter() { return new CorsResponseHeaderFilter(); } @Bean public CorsWebFilter corsWebFilter() { UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); CorsConfiguration corsConfiguration = new CorsConfiguration(); corsConfiguration.addAllowedHeader("*"); corsConfiguration.addAllowedMethod("*"); corsConfiguration.addAllowedOrigin("*"); corsConfiguration.setAllowCredentials(true); corsConfiguration.setMaxAge(600L); source.registerCorsConfiguration("/**", corsConfiguration); return new CorsWebFilter(source); } }
package com.him.gateway.filter; import org.springframework.cloud.gateway.filter.GatewayFilterChain; import org.springframework.cloud.gateway.filter.GlobalFilter; import org.springframework.cloud.gateway.filter.NettyWriteResponseFilter; import org.springframework.core.Ordered; import org.springframework.http.HttpHeaders; import org.springframework.web.server.ServerWebExchange; import reactor.core.publisher.Mono; import java.util.ArrayList; /** * 跨域请求头重复处理过滤器 * * @author liaoyuxing * @date 2021-5-20 */ public class CorsResponseHeaderFilter implements GlobalFilter, Ordered { @Override public int getOrder() { // 指定此过滤器位于NettyWriteResponseFilter之后 // 即待处理完响应体后接着处理响应头 return NettyWriteResponseFilter.WRITE_RESPONSE_FILTER_ORDER + 1; } @Override @SuppressWarnings("serial") public Monofilter(ServerWebExchange exchange, GatewayFilterChain chain) { return chain.filter(exchange).then(Mono.defer(() -> { exchange.getResponse().getHeaders().entrySet().stream() .filter(kv -> (kv.getValue() != null && kv.getValue().size() > 1)) .filter(kv -> (kv.getKey().equals(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN) || kv.getKey().equals(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS))) .forEach(kv -> { kv.setValue(new ArrayList () {{ add(kv.getValue().get(0)); }}); }); return chain.filter(exchange); })); } }
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