SetRequestHeader
过滤器
SetRequestHeader
过滤器接受 name
和 value
参数。以下列表配置了一个 SetRequestHeader
过滤器
application.yml
spring:
cloud:
gateway:
mvc:
routes:
- id: setrequestheader_route
uri: https://example.org
predicates:
- Path=/**
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.filter.BeforeFilterFunctions.uri;
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("setrequestheader_route")
.GET("/**", http())
.before(uri("https://example.org"))
.before(setRequestHostHeader("X-Request-Red", "Blue"))
.build();
}
}
此过滤器会替换(而不是添加)所有具有给定名称的请求头。因此,如果下游服务器响应了 X-Request-Red:1234
,它将被替换为 X-Request-Red:Blue
,下游服务将收到此请求头。
SetRequestHeader
知道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 SetRequestHeader
过滤器
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.filter.BeforeFilterFunctions.uri;
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> gatewayRouterFunctionsSetRequestHeader() {
return route("setrequestheader_route")
.route(host("{segment}.myhost.org"), http())
.before(uri("https://example.org"))
.before(setRequestHostHeader("X-Request-Red", "Blue-{segment}"))
.build();
}
}