AddRequestHeader 篩選器

AddRequestHeader 是一個 "before" 篩選器，它接受 name 和 value 參數。以下範例設定 AddRequestHeader 篩選器

application.yml
spring:
  cloud:
    gateway:
      mvc:
        routes:
        - id: add_request_header_route
          uri: https://example.org
          filters:
          - AddRequestHeader=X-Request-red, blue
GatewaySampleApplication.java
import static org.springframework.cloud.gateway.server.mvc.filter.BeforeFilterFunctions.addRequestHeader;
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> gatewayRouterFunctionsAddReqHeader() {
        return route(GET("/red"), http("https://example.org"))
                .before(addRequestHeader("X-Request-red", "blue"));
    }
}

此列表將 X-Request-red:blue 標頭新增至下游請求的標頭，適用於所有符合的請求。

AddRequestHeader 知道用於比對路徑或主機的 URI 變數。URI 變數可以用在值中，並在執行時展開。以下範例設定使用變數的 AddRequestHeader 篩選器

GatewaySampleApplication.java
@Configuration
class RouteConfiguration {

    @Bean
    public RouterFunction<ServerResponse> gatewayRouterFunctionsAddReqHeader() {
        return route(GET("/red/{segment}"), http("https://example.org"))
                .before(addRequestHeader("X-Request-red", "blue-{segment}"));
    }
}