Spring Cloud Gateway 内置过滤器 filter

https://docs.spring.io/spring-cloud-gateway/docs/2.2.6.RELEASE/reference/html/#gatewayfilter-factories

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

为原始请求添加名为 X-Request-red，值为 blue 的请求头。

- AddRequestHeader=X-Request-color, blue

server:
  port: 8060
spring:
  application:
    name: api-gateway
  cloud:
    # gateway的配置
    gateway:
      # 路由规则
      routes:
        - id: order_route # 路由的唯一标识， 路由到 order
          #          uri: http://localhost:8020 # 需要转发的地址
          uri: lb://order-nacos-service # 需要转发的地址  lb：使用nacos中的本地负载均衡策略
          # 断言规则 用于路由规则的匹配
          predicates:
            - Path=/order-serv/**
              # http://localhost:8060/order-serv/order/add 路由转到
            # http://localhost:8020/order-serv/order/add
           - After=2017-01-20T17:42:47.789-07:00[Asia/Shanghai]
           - Header=X-Request-Id,\d+
           - Method=GET
           - Query=name,zhangsan|lisi
           - CheckAuth=lisi
          filters:
            - StripPrefix=1  # 转发之前去掉第一层路径
              # http://localhost:8020/order-serv/order/add 过虑成
            # http://localhost:8020/order/add
            - AddRequestHeader=X-Request-color, blue
    # 配置 Nacos
    nacos:
      server-addr: 127.0.0.1:8848
      discovery:
        #        server-addr: 127.0.0.1:8848
        username: nacos
        password: nacos
        namespace: public

package com.wsm.order.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.swing.*;

@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    RestTemplate restTemplate;

    @RequestMapping("/add")
    public String add(){
        System.out.println("aaaaaaaaaaaaa");
//        String msg = restTemplate.getForObject("http://localhost:8011/stock/reduct", String.class);
        String msg = restTemplate.getForObject("http://stock-service/stock/reduct", String.class);
        return "hello world "+msg;
    }

    @RequestMapping("/header")
    public String header(@RequestHeader("X-Request-color") String color){
        return color;
    }
}

- AddRequestParameter=color, red

package com.wsm.order.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.swing.*;

@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    RestTemplate restTemplate;

    @RequestMapping("/add")
    public String add(){
        System.out.println("aaaaaaaaaaaaa");
//        String msg = restTemplate.getForObject("http://localhost:8011/stock/reduct", String.class);
        String msg = restTemplate.getForObject("http://stock-service/stock/reduct", String.class);
        return "hello world "+msg;
    }

    @RequestMapping("/header")
    public String header(@RequestHeader("X-Request-color") String color){
        return color;
    }

    @RequestMapping("/param")
    public String param(@RequestParam("color") String color){
        return color;
    }
}

server:
  port: 8020
  #应用名称  （nacos 会将该名称当作服务名称）
  servlet:
    context-path: /mall-order
spring:
  application:
    name: order-nacos-service
  cloud:
    nacos:
      server-addr: 127.0.0.1:8848
     server-addr: 192.168.133.128:8847  #集群 nginx 负载均衡访问 nacos
      discovery:
        username: nacos
        password: nacos
        namespace: public

- PrefixPath=/mall-order    #添加前缀， 对应微服务需要配置context-path

server:
  port: 8060
spring:
  application:
    name: api-gateway
  cloud:
    # gateway的配置
    gateway:
      # 路由规则
      routes:
        - id: order_route # 路由的唯一标识， 路由到 order
          #          uri: http://localhost:8020 # 需要转发的地址
          uri: lb://order-nacos-service # 需要转发的地址  lb：使用nacos中的本地负载均衡策略
          # 断言规则 用于路由规则的匹配
          predicates:
            - Path=/order-serv/**
              # http://localhost:8060/order-serv/order/add 路由转到
            # http://localhost:8020/order-serv/order/add
           - After=2017-01-20T17:42:47.789-07:00[Asia/Shanghai]
           - Header=X-Request-Id,\d+
           - Method=GET
           - Query=name,zhangsan|lisi
           - CheckAuth=lisi
          filters:
            - StripPrefix=1  # 转发之前去掉第一层路径
              # http://localhost:8020/order-serv/order/add 过虑成
            # http://localhost:8020/order/add
           - AddRequestHeader=X-Request-color, blue
           - AddRequestParameter=color, red
            - PrefixPath=/mall-order    #添加前缀， 对应微服务需要配置context-path
    # 配置 Nacos
    nacos:
      server-addr: 127.0.0.1:8848
      discovery:
        #        server-addr: 127.0.0.1:8848
        username: nacos
        password: nacos
        namespace: public

- RedirectTo=302, https://www.baidu.com/ #重定向到百度

- SetStatus=404

Original: https://www.cnblogs.com/mingforyou/p/15820419.html
Author: 残星
Title: Spring Cloud Gateway 内置过滤器 filter