`SetRequestHeader` 篩選器

SetRequestHeader 篩選器採用 name 和 value 參數。以下列表設定了 SetRequestHeader 篩選器

application.yml

spring:
  cloud:
    gateway:
      mvc:
        routes:
        - id: setrequestheader_route
          uri: https://example.org
          filters:
          - SetRequestHeader=X-Request-Red, Blue

GatewaySampleApplication.java

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> gatewayRouterFunctionsSetRequestHeader() {
		return route("add_request_parameter_route")
				.GET("/**", http("https://example.org"))
					.before(setRequestHostHeader("X-Request-Red", "Blue"))
					.build();
    }
}

此篩選器會取代（而非新增）具有指定名稱的所有標頭。因此，如果下游伺服器回應 X-Request-Red:1234，則會將其取代為 X-Request-Red:Blue，這將是下游服務收到的內容。

SetRequestHeader 知道用於比對路徑或主機的 URI 變數。URI 變數可用於值中，並在執行時展開。以下範例設定了使用變數的 SetRequestHeader 篩選器

application.yml

spring:
  cloud:
    gateway:
      routes:
      - id: setrequestheader_route
        uri: https://example.org
        predicates:
        - Host: {segment}.myhost.org
        filters:
        - SetRequestHeader=X-Request-Red, Blue-{segment}

GatewaySampleApplication.java

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;
import static import static org.springframework.cloud.gateway.server.mvc.predicate.GatewayRequestPredicates.host;

@Configuration
class RouteConfiguration {

    @Bean
    public RouterFunction<ServerResponse> gatewayRouterFunctionsSetRequestHeader() {
		return route("add_request_parameter_route")
				.route(host("{segment}.myhost.org"), http("https://example.org"))
					.before(setRequestHostHeader("X-Request-Red", "Blue-{segment}"))
					.build();
    }
}

SetRequestHeader 篩選器

`SetRequestHeader` 篩選器