首先看一下单体项目配置的跨域：
这里使用全局配置，也可使用注解的方式。
package com.syj.mp.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* @Author: xiefei
* @Date: 2019/9/7 0007 15:50
* @Version 1.0
*/
@Configuration
public class CorsConfig implements WebMvcConfigurer {
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedOrigins("*")
.allowCredentials(true)
.allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
.maxAge(3600);//设置与检查最大时间
}
}
然后因为是通过gateway访问的嘛，我后端项目因为在单体项目配置，所以说没有去解决，在shiro的filter中配置了
然后后面遇到了跨域，一直在网关配置，死活报错，最后才仔细看错误发现因为配置了两次，在项目里面又配置了一次导致报错。
下面看gateway的配置：
package com.syj.gateway;
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
*
* @Author: xiefei
* @Date: 2019/9/12 0012 16:15
* @Version 1.0
*/
@Configuration
public class RouteConfiguration {
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
*
* @param discoveryClient
* @return
*/
@Bean
public RouteDefinitionLocator discoveryClientRouteDefinitionLocator(DiscoveryClient discoveryClient, DiscoveryLocatorProperties properties) {
return new DiscoveryClientRouteDefinitionLocator(discoveryClient, properties);
}
}
这样配置还不够，还需在yml配置，不然报错：
spring:
main:
allow-bean-definition-overriding: true最后一个方法可能会报错，因为版本不对，我这里用的是2.1.7的版本。
（完）
