如何在ateoas中更改主机名

Question

我试图修改Hateoas中链接的主机名，但它并不是直接向前看。对于如何修改它以替换主机名，有什么想法吗？

HalModelBuilder builder = HalModelBuilder.halModelOf(resource)
        .link(linkTo(methodOn(BaseController.class).method1(...))
            .withSelfRel())
        .preview(new SummaryResource(...))
        .forLink(
            linkTo(
                methodOn(RefController.class).method2(...)
                .withRel("blah"));

更新：

我试图用以下代码替换主机名：

HalModelBuilder builder = HalModelBuilder.halModelOf(resource)
        .link(
            Link.of(
                apiGatewayUrl +
                    linkTo(methodOn(BaseController.class).method1(...)).toUri().getPath())
                .withSelfRel())
        .preview(new SummaryResource(...))
        .forLink(
            Link.of(
                apiGatewayUrl +
                    linkTo(methodOn(RefController.class).method2(...)).toUri().getPath())
                .withRel("blah"));

尝试使用.toUricomponentBuilder()替换主机名，但是url构建不正确。因此，选择将gatewayUrl与生成的hateoas连接起来。

Answer 1

似乎你在网关后面使用了Spring。如果网关正确设置x-forwarded-*头，如果使用Spring，则根据弹簧启动文件设置一个属性server.forward-headers-strategy = framework。然后ServletWebServerFactoryAutoConfiguration为您创建一个ForwardedHeaderFilter bean。

@Bean
@ConditionalOnMissingFilterBean(ForwardedHeaderFilter.class)
@ConditionalOnProperty(value = "server.forward-headers-strategy", havingValue = "framework")
public FilterRegistrationBean<ForwardedHeaderFilter> forwardedHeaderFilter() {
    ForwardedHeaderFilter filter = new ForwardedHeaderFilter();
    FilterRegistrationBean<ForwardedHeaderFilter> registration = new FilterRegistrationBean<>(filter);
    registration.setDispatcherTypes(DispatcherType.REQUEST, DispatcherType.ASYNC, DispatcherType.ERROR);
    registration.setOrder(Ordered.HIGHEST_PRECEDENCE);
    return registration;
}

然后Spring生成具有与网关外相同的基本URI (主机名、端口、路径)的链接。见Spring HATEOAS文档。