SpringCloudGateWay之网关跨域问题解决

应用场景:
所有的微服务是通过网关这个入口,在和前端对接口时,必然设计到有关跨域的问题。关于服务端跨域有很多方案,可以加注解(指定具体的路径允许跨域),也可以统一配置。

另外如果不在网关入口这配置,势必会造成一个很大的影响,那就是前端通过网关入口调用其它微服务,通常会出现如下错误:

1
Access to XMLHttpRequest at 'xxx' from origin 'xxx' has been been blocked by CORS policy

核心代码(解决方案):

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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;
import org.springframework.web.util.pattern.PathPatternParser;

@Configuration
public class CorsConfig {

@Bean
public CorsWebFilter corsFilter() {
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
source.registerCorsConfiguration("/**", buildConfig());
return new CorsWebFilter(source);
}

private CorsConfiguration buildConfig() {
CorsConfiguration corsConfiguration = new CorsConfiguration();
//在生产环境上最好指定域名,以免产生跨域安全问题
corsConfiguration.addAllowedOrigin("*");
corsConfiguration.addAllowedHeader("*");
corsConfiguration.addAllowedMethod("*");
return corsConfiguration;
}
}

SpirngCloud GateWay解决方案:
Spring Cloud Gateway – Cors解决跨域问题

注解解决方案:
java后端解决跨域问题(过滤器或者注解)

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