SetRequestHostHeader 過濾器

在某些情況下，可能需要覆蓋 host header。在這種情況下，SetRequestHostHeader 過濾器可以用指定的值替換現有的 host header。該過濾器接受一個 host 引數。以下列表配置了一個 SetRequestHostHeader 過濾器

application.yml
spring:
  cloud:
    gateway:
      mvc:
        routes:
        - id: set_request_host_header_route
          uri: https://:8080
          predicates:
          - Path=/headers
          filters:
          - name: SetRequestHostHeader
            args:
              host: example.org
GatewaySampleApplication.java
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("https://:8080"))
            .before(setRequestHostHeader("example.org"))
            .build();
    }
}

SetRequestHostHeader 過濾器會將 host header 的值替換為 example.org。