This version is still in development and is not considered stable yet. For the latest stable version, please use Spring Cloud Gateway 4.2.0!

PreserveHostHeader Filter

The PreserveHostHeader filter has no parameters. This filter sets a request attribute that the HandlerFunction inspects to determine if the original host header should be sent rather than the host header determined by the HTTP client. The following example configures a PreserveHostHeader filter:

application.yml
spring:
  cloud:
    gateway:
      mvc:
        routes:
        - id: preserve_host_route
          uri: https://example.org
          filters:
          - PreserveHostHeader
GatewaySampleApplication.java
import static org.springframework.cloud.gateway.server.mvc.filter.BeforeFilterFunctions.preserveHostHeader;
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> gatewayRouterFunctionsPreserveHostHeader() {
		return route("preserve_host_route")
				.GET("/**", http("https://example.org"))
					.before(preserveHostHeader())
					.build();
    }
}