`AddRequestHeader` 過濾器

AddRequestHeader 是一個 "before" 過濾器，它接受一個 name 和一個 value 引數。以下示例配置了 AddRequestHeader 過濾器：

application.yml

spring:
  cloud:
    gateway:
      mvc:
        routes:
        - id: add_request_header_route
          uri: https://example.org
          predicates:
          - Path=/red
          filters:
          - AddRequestHeader=X-Request-red, blue

GatewaySampleApplication.java

import static org.springframework.cloud.gateway.server.mvc.filter.BeforeFilterFunctions.uri;
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("add_request_header_route")
            .GET("/red", http())
            .before(uri("https://example.org"))
            .before(addRequestHeader("X-Request-red", "blue"));
    }
}

此配置會將 X-Request-red:blue 請求頭新增到所有匹配請求的下游請求頭中。

AddRequestHeader 能夠識別用於匹配路徑或主機的 URI 變數。URI 變數可以在值中使用，並在執行時進行擴充套件。以下示例配置了一個使用變數的 AddRequestHeader 過濾器：

GatewaySampleApplication.java

import static org.springframework.cloud.gateway.server.mvc.filter.BeforeFilterFunctions.uri;
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("add_request_header_route")
            .GET("/red/{segment}", http())
            .before(uri("https://example.org"))
            .before(addRequestHeader("X-Request-red", "blue-{segment}"));
    }
}

AddRequestHeader 過濾器

`AddRequestHeader` 過濾器