AddResponseHeader 过滤器

DeepSeek V3 中英对照 AddResponseHeader Filter AddResponseHeader Filter

AddResponseHeader 过滤器接收 name 和 value 参数。以下示例配置了一个 AddResponseHeader 过滤器：

spring:
  cloud:
    gateway:
      server:
        webmvc:
          routes:
            - id: add_response_header_route
              uri: https://example.org
              predicates:
              - Path=/anything/addresheader
              filters:
              - AddResponseHeader=X-Response-Red, Blue

import static org.springframework.cloud.gateway.server.mvc.filter.BeforeFilterFunctions.uri;
import static org.springframework.cloud.gateway.server.mvc.filter.AfterFilterFunctions.addResponseHeader;
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> gatewayRouterFunctionsAddRespHeader() {
        return route("add_response_header_route")
            .GET("/anything/addresheader", http())
            .before(uri("https://example.org"))
            .after(addResponseHeader("X-Response-Red", "Blue"))
            .build();
    }
}

这为所有匹配的请求，在下游响应的头部添加了 X-Response-Red:Blue 标头。

AddResponseHeader 能够识别用于匹配路径或主机的 URI 变量。URI 变量可以在值中使用，并在运行时展开。以下示例配置了一个使用变量的 AddResponseHeader 过滤器：

import static org.springframework.cloud.gateway.server.mvc.filter.BeforeFilterFunctions.uri;
import static org.springframework.cloud.gateway.server.mvc.filter.AfterFilterFunctions.addResponseHeader;
import static org.springframework.cloud.gateway.server.mvc.handler.GatewayRouterFunctions.route;
import static org.springframework.cloud.gateway.server.mvc.handler.HandlerFunctions.http;
import static org.springframework.cloud.gateway.server.mvc.predicate.GatewayRequestPredicates.host;

@Configuration
class RouteConfiguration {

    @Bean
    public RouterFunction<ServerResponse> gatewayRouterFunctionsAddRespHeader() {
        return route("add_response_header_route")
            .route(host("{segment}.myhost.org"), http())
            .before(uri("https://example.org"))
            .after(addResponseHeader("foo", "bar-{segment}"))
            .build();
    }
}