SetRequestHostHeader 过滤器

DeepSeek V3 中英对照 SetRequestHostHeader Filter SetRequestHostHeader Filter

在某些情况下，可能需要覆盖主机头。在这种情况下，SetRequestHostHeader 过滤器可以用指定的值替换现有的主机头。该过滤器接受一个 host 参数。以下配置示例展示了如何配置 SetRequestHostHeader 过滤器：

spring:
  cloud:
    gateway:
      server:
        webmvc:
          routes:
            - id: set_request_host_header_route
              uri: http://localhost:8080
              predicates:
              - Path=/headers
              filters:
              - name: SetRequestHostHeader
                args:
                  host: example.org

import static org.springframework.cloud.gateway.server.mvc.filter.BeforeFilterFunctions.uri;
import static org.springframework.cloud.gateway.server.mvc.filter.BeforeFilterFunctions.setRequestHostHeader;
import static org.springframework.cloud.gateway.server.mvc.handler.GatewayRouterFunctions.route;
import static org.springframework.cloud.gateway.server.mvc.handler.HandlerFunctions.http;

@Configuration
class RouteConfiguration {

    @Bean
    public RouterFunction<ServerResponse> gatewayRouterFunctionsSetRequestHostHeader() {
        return route("set_request_host_header_route")
            .GET("/headers", http())
            .before(uri("http://localhost:8080"))
            .before(setRequestHostHeader("example.org"))
            .build();
    }
}

SetRequestHostHeader 过滤器将主机头的值替换为 example.org。