SetResponseHeader GatewayFilter Factory

SetResponseHeader GatewayFilter 工厂采用 name 和 value 参数。以下清单配置了 SetResponseHeader GatewayFilter：

The SetResponseHeader GatewayFilter factory takes name and value parameters. The following listing configures a SetResponseHeader GatewayFilter:

application.yml
spring:
  cloud:
    gateway:
      routes:
      - id: setresponseheader_route
        uri: https://example.org
        filters:
        - SetResponseHeader=X-Response-Red, Blue

此 GatewayFilter 替换（而不是添加）所有具有给定名称的标头。因此，如果下游服务器用 X-Response-Red:1234 响应，它将被替换为 X-Response-Red:Blue，这是网关客户端将收到的内容。

This GatewayFilter replaces (rather than adding) all headers with the given name. So, if the downstream server responded with X-Response-Red:1234, it will be replaced with X-Response-Red:Blue, which is what the gateway client would receive.

SetResponseHeader 了解用于匹配路径或主机的 URI 变量。URI 变量可以用于该值，并将是运行时展开的。以下示例配置了使用变量的 SetResponseHeader GatewayFilter：

SetResponseHeader is aware of URI variables used to match a path or host. URI variables may be used in the value and will be expanded at runtime. The following example configures an SetResponseHeader GatewayFilter that uses a variable:

application.yml
spring:
  cloud:
    gateway:
      routes:
      - id: setresponseheader_route
        uri: https://example.org
        predicates:
        - Host: {segment}.myhost.org
        filters:
        - SetResponseHeader=foo, bar-{segment}