java - 在 Spring Cloud Gateway 中获取真实的客户端 IP 地址

Question

我在 Spring Cloud Gateway (SCG) 中实现速率限制。我使用以下代码获取客户端 IP 地址

@Component
public class RemoteAddressKeyResolver implements KeyResolver {
    @Override
    public Mono<String> resolve(ServerWebExchange exchange) {
        return Mono.just(exchange.getRequest().getRemoteAddress().getAddress().getHostAddress());
    }
}

我的 SCG 在代理后面，因此它获取代理地址而不是真实客户端地址。如何获取真实的客户地址？

Answer 1

我找到了解决办法! RemoteAddressResolver 的实现是XForwardedRemoteAddressResolver。直接使用即可，不需要再实现逻辑。

@Component
public class RemoteAddressKeyResolver implements KeyResolver {
    @Override
    public Mono<String> resolve(ServerWebExchange exchange) {
        XForwardedRemoteAddressResolver resolver = XForwardedRemoteAddressResolver.maxTrustedIndex(1);
        InetSocketAddress inetSocketAddress = resolver.resolve(exchange);
        return Mono.just(inetSocketAddress.getAddress().getHostAddress());
    }
}

就这么简单!