如何自定义实现基于域名前缀的环境路由隔离

实现基于域名前缀的环境路由隔离的功能，需要继承RouteFilter，例如，在Spring Cloud Gateway上继承DefaultGatewayStrategyRouteFilter

public class MyGatewayStrategyRouteFilter extends DefaultGatewayStrategyRouteFilter {
    private static final Logger LOG = LoggerFactory.getLogger(MyGatewayStrategyRouteFilter.class);

    // 自定义根据域名全链路环境隔离
    @Override
    public String getRouteEnvironment() {
        String host = gatewayStrategyContextHolder.getURI().getHost();
        if (host.contains("nepxion.com")) {
            LOG.info("自定义根据域名全链路环境隔离, URL={}", host);

            String environment = host.substring(0, host.indexOf("."));

            LOG.info("执行全链路环境隔离={}", environment);

            return environment;
        }

        return super.getRouteEnvironment();
    }
}

在配置类里@Bean方式进行过滤类创建，覆盖框架内置的过滤类

@Bean
public GatewayStrategyRouteFilter gatewayStrategyRouteFilter() {
    return new MyGatewayStrategyRouteFilter();
}

本地测试，为验证结果，请事先在hosts文件中配置如下

127.0.0.1 common.nepxion.com
127.0.0.1 env1.nepxion.com
127.0.0.1 env2.nepxion.com

• 根据env1.nepxion.com域名路由到env1环境

• 根据common.nepxion.com域名路由到common环境

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